Home A novel fabrication method of slippery lubricant-infused porous surface by thiol-ene click chemistry reaction for anti-fouling and anti-corrosion applications
Article Open Access

A novel fabrication method of slippery lubricant-infused porous surface by thiol-ene click chemistry reaction for anti-fouling and anti-corrosion applications

  • Xuezhun Gu , Hao Jiang , Xiaotong Chen , Yu Li and Guoqing Wang EMAIL logo
Published/Copyright: November 6, 2023
Become an author with De Gruyter Brill

Abstract

A novel and simple way for efficiently preparing stable and non-toxic slippery lubricant-infused porous surface (SLIPS) will expand its anti-fouling and anti-corrosion applications in marine environments. Herein, vinyl-terminated polydimethylsiloxane was covalently grafted on the surface of nano-SiO2 by a thiol-ene click chemistry reaction. After that, SLIPS was efficiently prepared at room temperature via the spraying method on various substrate surfaces. Surface wettability results showed that a water droplet (10 μL) can slip on the surface with an inclination of 10° and a stained water droplet can slip without stain during the slide process, which proved that SLIPS displayed excellent slippery performance. The existence of molecular-level slippery silicone oil film on the rough surface. Anti-fouling and anti-corrosion tests showed that the prepared SLIPS exhibited stable and excellent anti-fouling and anti-corrosion performance after immersion in Pseudoalteromonas sp. culture solution for 14 days. The SLIPS exhibited a value of more than 98% of bacterial attachment inhibition efficiency and a value of 99.9% of corrosion inhibition efficiency. This facile method provides guidance to fabricate SLIPS for its anti-fouling and anti-corrosion applications in marine environments.

Graphical abstract

1 Introduction

Metallic materials are widely used in marine engineering due to their high mechanical strength and hardness. However, metal corrosion and biofouling occur in marine environments, especially for various marine buildings and projects that cannot be moved for a long time, biofouling and corrosion are more serious under the static state (1,2). Generally, the activity or metabolites of microorganisms often accelerate corrosion, which is called microbial-influenced corrosion (MIC). MIC causes serious economic and security problems for marine engineering and transportation. It is estimated that metal corrosion resulting from MIC accounts for 20% of the total cost of corrosion in marine environments (3,4). Therefore, it is urgent and important to mitigate MIC in practical applications.

Currently, several strategies have been developed to control MIC in the marine environment, such as organic coatings (5,6), biocides (7,8), sacrificial anodes (9,10), and hydrogel (11). However, these conventional methods fail to meet the environmental and energy-saving requirements. From the perspective of the mechanism, MIC is a phenomenon that occurs at the metal/solution interface. The surface properties of metal substrates influence bacterial sedimentation and subsequent corrosion behavior (12,13). Therefore, actively inhibiting the attachment of bacteria on the metal/solution interface is one of the more effective means to solve MIC.

Inspired by Nepenthes, Aizenberg’s group first reported the slippery lubricant-infused porous surface (SLIPS) in 2011 (14). Over the past decade, SLIPS has garnered extensive research interest in various fields. SLIPS can inhibit the attachment of bacteria on the metal/solution interface as a result of the excellent ultra-slippery property of the surface, thereby opening up a novel avenue for the inhibition of MIC. Studies have confirmed that SLIPS can suppress bacterial attachment and inhibit the occurrence of MIC in seawater (1520).

Generally, the conventional fabrication process of SLIPS is a synergetic cooperation of the surface rough surface structure, low surface energy materials, and lubricating oils, which satisfies the following three steps: (1) construction of the surface micro-nano rough structure, (2) low surface energy chemical modification of rough structures, and (3) injection of low surface energy lubricants. Among them, the construction of the rough surface structure is fundamental to fabricating SLIPS. Currently, many methods have been developed to fabricate rough surface structures on various substrates, such as the chemical etching method, self-assembling method, electrochemical deposition method, and spray method (21,22). Wang et al. constructed SLIPS on the surfaces of glass and zinc sheets by a hydrothermal method, and the as-prepared SLIPS exhibited an excellent inhibiting effect on the corrosion behavior of sulfate-reducing bacteria (SRB) (23,24). Li et al. reported a simple hydrothermal method and modification process to fabricate a superhydrophobic surface (SHS) on a magnesium alloy substrate, and the preparation of SLIPS can be achieved by injecting lubricant into SHS by the spin-coating method (25). Xiang et al. successfully fabricated a slippery zinc phosphate coating composed of homogeneous pores by the electrochemical deposition method on the substrate, and the as-prepared SLIPS displayed an efficient and sustainable anti-corrosion performance (26). However, these methods have significant restrictions on the base material, such as the type and size of the metal. Besides, these methods usually require high-temperature and high-pressure conditions to complete the process of surface chemical modification. These two aspects limit the applications of SLIPS on various metal materials with complex shapes in marine engineering. In comparison, the spraying method can be used as a general method on the surface of various base materials. For example, Liang et al. sprayed hydrophobic nano-SiO2 particles on the surface of Q235 carbon steel to construct a stable and wear-resistant SLIPS. The bacteria settlement and electrochemical experiments proved that as-prepared SLIPS exhibited a stable and excellent anti-fouling and anti-corrosion performance after immersion in SRB culture solution for 14 days (27). Despite the great advances in the fabrication of rough structures on various base materials, it is still a challenge to complete the chemical modification of the surface to obtain stable hydrophobic properties. Additionally, the commonly used fluorine-containing silane coupling agents and lubricants have potential harm to the environment with long-term use (28).

Silicone oil can be used as an optimal choice for environmentally non-toxic low surface energy lubricants (29). However, its compatibility with fluorine-containing silane coupling agents used during the low surface energy modification process needs to be improved. Therefore, a new surface modification method is needed to improve the compatibility between silicone oil lubricants and hydrophobic-modified surface porous structures (14,30).

In this article, vinyl-terminated polydimethylsiloxane (Vi-PDMS) was covalently grafted on the surface of nano-SiO2 by a thiol-ene click chemistry reaction. The molecular structure of Vi-PDMS is similar to silicone oil, which could improve the compatibility between silicone oil lubricants and hydrophobic-modified surface porous structures, and then SLIPS was prepared at room temperature via the spraying method. Surface wettability results proved that SLIPS displayed excellent slippery performance. Anti-fouling and anti-corrosion tests showed that the prepared SLIPS exhibited stable and excellent anti-fouling and anti-corrosion performance after immersion in Pseudoalteromonas sp. culture solution. Under the static and dynamic conditions, the bacterial coverage on the SLIPS surface was only 0.56% and 0.23%, respectively. The electrochemical impedance spectroscopy (EIS) test results showed that the |Z|0.01 Hz value of SLIPS after 14 days of immersion is 4.89 × 1010 Ω·cm2, indicating that the SLIPS had a stable anti-corrosion performance. This work provides a simple way for efficiently preparing stable and non-toxic slippery surfaces, which expands the anti-fouling and anti-corrosion applications of SLIPS in marine engineering.

2 Materials and methods

2.1 Materials

Nano-SiO2, benzoin dimethyl ether (DMPA), yeast powder, and tryptone were purchased from Shanghai Maclin Biochemical Technology Co., Ltd. Epoxy resin and polyamide curing agent were purchased from Shanghai Xuanyang Chemical Materials Co., Ltd. 3-Mercaptopropyltrimethoxysilane (MPTS) was purchased from Anhui Zesheng Technology Co., Ltd. Ethanol, n-hexane, and ferric sulfate (FeSO4·7H2O) were purchased from Xilong Scientific Co., Ltd. Silicone oil (100 cst) was purchased from Xiya Reagent Company. Vi-PDMS was purchased from Lijun Silicone Materials Co., Ltd. All chemical reagents are analytically pure and used without further purification. The Q235 steel sheets and glasses are commercially available. The Q235 steel sheets were polished to 2,000 grit with dry SiC sandpaper. Then, the Q235 steel sheets and glasses were washed with ethanol in an ultrasonic bath and dried with a blower.

2.2 Fabrication of SLIPS via thiol-ene click chemistry reaction

2.2.1 Preparation process of SiO2@MPTS@PDMS

The modification process of nano-SiO2 is shown in Figure 1. To graft sulfhydryl groups on the surface of nano-SiO2, 1.5 g nano-SiO2 and 1 mL MPTS were added to 20 mL ethanol solution under seal and ultrasonication for 5 min and then kept constant stirring at 200 rpm for 3 h. Subsequently, the products were centrifuged at 8,000 rpm for 10 min washed with ethanol three times and dried at 60℃ until a constant weight was achieved for further examination. After that, the sulfhydryl group modified nano-SiO2 (SiO2@MPTS) was obtained.

Figure 1 
                     Schematic diagram of the preparation process of SiO2@MPTS@PDMS.
Figure 1

Schematic diagram of the preparation process of SiO2@MPTS@PDMS.

Afterward, Vi-PDMS was dissolved in n-hexane completely to obtain a 15 wt% Vi-PDMS solution, and 1.5 g SiO2@MPTS was added to the above solution with stirring until it was evenly dispersed. As the photoinitiator, DMPA (0.01:1 w/w% initiator/Vi-PDMS) was added to the solution and irradiated for 1 h under UV light to form Vi-PDMS modified nano-SiO2 (SiO2@MPTS@PDMS). The products were centrifuged at 8,000 rpm for 10 min, washed with n-hexane three times, and dried at 60℃ until a constant weight was achieved.

2.2.2 Fabrication of SLIPS

To prepare the SHS, the epoxy resin and polyamide curing agent (1:1 w/w%) were first mixed and uniformly coated on the substrate with a brush. Then, it was put on a 60℃ heater plate for pre-curing. Subsequently, the SiO2@MPTS@PDMS ethanol solution was sprayed on the epoxy surface with a spray gun under 0.4 MPa air at a spraying distance of 30 cm. Finally, it was placed on a heater plate until it was cross-linked and cured to obtain a SHS. To prepare the SLIPS, the silicone oil was injected into the tilted SHS until the silicone oil infiltrated the rough surface completely.

2.3 Surface characterization

Field-emission scanning electron microscopy (FE-SEM, Verios G4 UC, Thermo Fisher Scientific) was performed to characterize the surface morphology of the samples and energy dispersive spectrometer (EDS) characterization. X-ray photoelectron spectrometers (XPS; Axis Supra, KRATOS) were performed to characterize the chemical composition of the samples. The chemical bonds and functional groups of the samples were investigated by the Fourier transform infrared spectroscopy (FT-IR; T27, Bruker). Contact angles (CAs) and sliding angles were measured on the CA system (SDC-100H; Shengding Precision Instrument Co., Ltd.) at room temperature.

2.4 Bacterial settlement experiment

The Pseudoalteromonas sp. was used as the model bacteria for the bacterial settlement experiment. The bacterial culture medium was prepared by adding 1,000 g yeast powder, 5,000 g tryptone, and 0.017 g FeSO4·7H2O to 1,000 L seawater. Before use, the bacterial culture medium was sterilized at 121℃ by an autoclave for 20 min. After that, Pseudoalteromonas sp. was inoculated in the culture medium and cultivated for 3 days. After sterilizing under UV radiation for 40 min, the samples were adhered to the inner wall of the beaker by hot melt adhesive and immersed in the bacterial solution. To simulate the static and dynamic marine environments, the beaker was sealed with kraft paper and conducted in a 30°C incubator and orbital shaker with a shaking speed of 120 rpm, respectively.

During the bacterial settlement test, the bacterial culture medium was replaced by the freshly equivalent volume of sterilized culture medium every 3 days to keep the bacteria alive. At every predetermined time, the samples were washed with sterilized PBS solution and stained by DAPI stain at a concentration of 100 ng·mL−1 for 15 min. The stained samples were observed by a fluorescence microscope (DM5000B, LEICA). The bacterial surface coverage was analyzed by ImageJ software.

2.5 Electrochemical test

The corrosion behavior of different samples in the Pseudoalteromonas sp. bacterial culture medium was measured by EIS and potentiodynamic polarization experiments through the computer-controlled electrochemical system (DH7000) at room temperature. The electrochemical test was performed in a three-electrode system, including the different samples with a test area of 1 × 1 cm2 as a working electrode, a platinum electrode as a counter electrode, and an Ag/AgCl (3 M KCl) electrode as a reference electrode. The EIS experiment was carried out with a frequency range of 105–10−2 Hz at an open circuit potential and a perturbation voltage of 50 mV amplitude. The EIS results were analyzed by ZsimpWin software.

3 Results and discussion

3.1 Chemical characterization of modified nano-SiO2

The foundational condition of fabricating SLIPS was to design a hydrophobic micro/nano rough structure. As shown in Figure 2a, the sulfhydryl group was grafted on the surface of nano-SiO2 and MPTS by the hydrolytic condensation reaction between the hydroxyl groups. The sulfhydryl-ene click chemical reaction was triggered under UV light to achieve the modification process of nano-SiO2. Figure 2b illustrates the FT-IR spectrum of the SiO2, SiO2@MPTS, and SiO2@MPTS@PDMS. The absorption peak at 476 cm−1 of the three samples was the characteristic peak of Si–O–Si symmetric contraction vibration. The absorption peaks at 800 and 1,092 cm−1 were corresponding to the symmetric and asymmetric stretching of Si–O–Si, respectively (31). The absorption peak corresponding to the SH group in the spectrum of the SiO2@MPTS sample was not observed due to the relatively low content of thiol and poor sensitivity of FT-IR (32). However, the absorption peaks at 2,933 and 2,850 cm−1 of MPTS can be detected, which can be attributed to the C–H stretch of methylenes of the alkyl chain. This proved that the MPTS was successfully grafted on the nano-SiO2 surface (33,34). In the spectrum of SiO2@MPTS@PDMS, the absorption peak at 1,263 cm−1 was attributed to the deformation vibration of Si–CH3, and the absorption peaks at 2,963 and 2,904 cm−1 resulted from the asymmetric stretching vibration and symmetric stretching vibration of –CH3, respectively (35). These characteristic peaks of PDMS indicated that the Vi-PDMS was successfully coated on the surfaces of the SiO2@MPTS particles. The hydrophobic modification process was further verified by the chemical composition analysis through XPS spectra. As shown in Figure 2c, the area of the C 1s peak in the XPS spectra was observed to be gradually increasing due to the MPTS and Vi-PDMS being grafted individually on the SiO2 surface.

Figure 2 
                  (a) SiO2-modified chemical reaction process. (b) FT-IR spectrum of SiO2, SiO2@MPTS, and SiO2@MPTS@PDMS. (c) XPS spectrum of SiO2, SiO2@MPTS, and SiO2@MPTS@PDMS.
Figure 2

(a) SiO2-modified chemical reaction process. (b) FT-IR spectrum of SiO2, SiO2@MPTS, and SiO2@MPTS@PDMS. (c) XPS spectrum of SiO2, SiO2@MPTS, and SiO2@MPTS@PDMS.

The high-resolution spectra of C 1s, O 1s, and S 2p of SiO2@MPTS are shown in Figure 3a. The fitting curves in the C1s spectrum were divided into three peaks at 284.7, 284.2, and 286.5 eV, which could be assigned to the C–C, C–Si, and C–S bonds of MPTS, respectively. The peaks at 532.9 and 532.3 eV in the O 1 s spectrum correspond to the Si–O and C–O bonds in the MPTS, respectively. The peak at 532.6 eV in the O 1s spectrum was attributed to the SiO2 (36). The peak at 163.8 eV corresponded to the S 2p, indicating that the MPTS was successfully modified on the surface of SiO2. The EDS mapping of the SiO2@MPTS is shown in Figure 3b. The distribution of S elements further indicated that MPTS was successfully modified on the original SiO2 surface. The results of the XPS and EDS analysis were identical to the FT-IR test, indicating that sulfhydryl groups were successfully grafted to the SiO2 surface after the modification process of MPTS. The sulfhydryl groups can further react with the vinyl groups of the Vi-PDMS molecular chains to obtain SiO2@MPTS@PDMS products.

Figure 3 
                  (a) XPS spectra of C 1s, O 1s, and S 2p peak profiles. (b) The element distribution mappings of SiO2@MPTS.
Figure 3

(a) XPS spectra of C 1s, O 1s, and S 2p peak profiles. (b) The element distribution mappings of SiO2@MPTS.

3.2 Surface structure and wettability analysis

A porous micro/nano-rough structure surface was constructed by spraying hydrophobic nano-SiO2 particles on the surface of a sandblasting steel substrate. As shown in Figure 4a, the FE-SEM images showed a large number of irregular porous structures on the substrate surface, which could be used as a reservoir for lubricating oil through capillary force action. The surface wettability of the prepared samples is presented in Figure 4b. The original SiO2 exhibits a superhydrophilic property with a water contact angle (WCA) of 0°, which is due to the porous micro/nanostructure with an inherent hydrophilic character. The SHS fabricated on the substrate through spraying hydrophobic SiO2 particles exhibit superhydrophobic properties with a WCA of 151.4°. As shown in Figure 4c, the stained water droplets stood on the SHS without infiltration, whereas the original surface can be completely wetted by the droplet. The hydrophobicity of the porous structure ensured that the surface was preferentially wetted by the lubricant. After the hydrophobic silicone lubricant was injected and stored in the porous structure of the SHS due to the similar surface energy and chemical composition, SLIPS was successfully prepared, as confirmed by the WCA decreased from 151.4° to 102.3°.

Figure 4 
                  (a) SEM images of rough structure surface. (b) Water CA of different samples. (c) The surface state of the stained droplet before and after SiO2 modification.
Figure 4

(a) SEM images of rough structure surface. (b) Water CA of different samples. (c) The surface state of the stained droplet before and after SiO2 modification.

As shown in Figures 5a, 10 μL of water droplets could easily slip off the SLIPS at a low inclination angle (∼10°) under a small amount of gravity, indicating the formation of a continuous and stable lubricating oil layer on a porous surface. As can be seen in Figure 5b, the stained droplets could rapidly slip off the surface without staining traces during the slip process, indicating that the prepared SLIPS had an excellent ultra-slippery property. The ultra-slippery property of the SLIPS is the basis for the wide applications for anti-fouling and anti-corrosion.

Figure 5 
                  (a) The sliding process of the droplet (10 μL) on the SLIPS. (b) The stained droplet sliding process on the SLIPS.
Figure 5

(a) The sliding process of the droplet (10 μL) on the SLIPS. (b) The stained droplet sliding process on the SLIPS.

3.3 Mechanical stability

As we all know, the SLIPS was usually fabricated by infusing lubricant oil into the hydrophobic porous structure. So, the mechanical stability of the hydrophobic porous structure played a crucial role in storing lubricant oil. As expected, the fabricated SHS exhibited excellent mechanical stability through the sandpaper abrasion test. As shown in Figure 6, the WCA of the SHS showed no obvious change after 50 abrasion cycles under 1,000 mesh sandpaper. Furthermore, the WCA of the SHS gradually decreased to a WCA of 130° after 50 abrasion cycles.

Figure 6 
                  Variation of WCA on SHS after different sandpaper abrasion cycles.
Figure 6

Variation of WCA on SHS after different sandpaper abrasion cycles.

We further investigated the impact of wear cycles on the electrochemical performance of SLIPS. As depicted in Figure 7, following 50 wear cycles, the impedance value of SLIPS at 0.01 Hz decreased from an initial magnitude of 11 to approximately 6 orders of magnitude. Despite a reduction by five orders of magnitude after friction cycling, it remained nearly four orders of magnitude higher than that observed for the control sample, demonstrating exceptional corrosion resistance.

Figure 7 
                  Variation of EIS results of SLIPS after different sandpaper abrasion cycles.
Figure 7

Variation of EIS results of SLIPS after different sandpaper abrasion cycles.

3.4 Anti-fouling performance of SLIPS

Using Q235 carbon steel as the bare substrate, SHS and SLIPS as the target samples, and Pseudoalteromonas sp. as the model bacteria, the anti-fouling performance of the different surfaces under simulated static and dynamic marine environment was analyzed by fluorescence microscopy. As shown in Figure 8, during a 14-day immersion in the Pseudoalteromonas sp. culture medium (Figure 8a1–a3) under a simulated static marine environment, a large amount of Pseudoalteromonas sp. aggregated and attached to the surface of the bare Q235 carbon steel. However, only a very small amount of Pseudoalteromonas sp. was attached to the SLIPS after the 14 days of immersion (Figure 8c1–c3), which demonstrated excellent anti-fouling performance of the SLIPS. The lubricating layer infused in the porous rough structure can act as a vital component in inhibiting the adhesion of Pseudoalteromonas sp. (37). On the one hand, it is difficult for bacteria to attach and gather on the slippery lubricating layer due to the slippery properties of the surfaces. On the other hand, it is difficult for bacteria to penetrate the hydrophobic lubricating layer and settle on the metal surface (23). Interestingly, Figure 8b1–b3 shows that the bacterial adhesion is more severe on SHS than that on the Q235 carbon steel and SLIPS as a result of the unstable air layer trapped in the rough structure, which was infiltrated by seawater during the immersion process. The porous rough structure of SHS can provide a larger specific surface area for Pseudoalteromonas sp. attachment, thus resulting in a more severe bacterial adhesion.

Figure 8 
                  Fluorescence photographs of bacterial adhesion on the surface of different samples after immersion in bacterial solution under static conditions (a: BS, b: SHS, c: SLIPS; 1: soak 3 days, 2: soak 7 days, 3: soak 14 days).
Figure 8

Fluorescence photographs of bacterial adhesion on the surface of different samples after immersion in bacterial solution under static conditions (a: BS, b: SHS, c: SLIPS; 1: soak 3 days, 2: soak 7 days, 3: soak 14 days).

In practice, marine engineering is often used in dynamic environments where water flow generates high shear forces on the surface of the materials, affecting the adhesion of fouling microorganisms to the surfaces. Therefore, we further performed the bacterial anti-fouling tests in simulated dynamic marine environments. As shown in Figure 9, after 14 days of dynamic testing, Pseudoalteromonas sp. was still easy to attach to the bare Q235 carbon steel and SHS, which is similar to the results under static conditions. However, it is difficult for Pseudoalteromonas sp. to attach to the SLIPS, indicating that SLIPS still has an excellent ability to efficiently inhibit the attachment of bacteria under a dynamic environment.

Figure 9 
                  Fluorescence photographs of bacterial adhesion on the surface of different samples after immersion in bacterial solution under dynamic conditions (a: BS, b: SHS, c: SLIPS; 1: soak 3 days, 2: soak 7 days, 3: soak 14 days).
Figure 9

Fluorescence photographs of bacterial adhesion on the surface of different samples after immersion in bacterial solution under dynamic conditions (a: BS, b: SHS, c: SLIPS; 1: soak 3 days, 2: soak 7 days, 3: soak 14 days).

To make a more quantitative comparison, the anti-biofouling performance of the bare Q235 carbon steel, SHS, and SLIPS under static and dynamic environments is evaluated by bacterial surface coverage. As shown in Figure 10a, after 14 days of static immersion, the bacterial surface coverage of bare Q235 carbon steel and SHS increased from 1.47% and 7.23% to 38.84% and 41.99%, respectively. The bacterial surface coverage of SLIPS after 14 days of immersion was only 0.56%, corresponding to the bacterial attachment inhibition rate of 98.56%. The bacterial surface coverages of the three samples under the dynamic conditions are shown in Figure 10b. The bacterial surface coverage of the bare Q235 carbon steel and SHS reached 17.75% and 37.27% after 14 days of immersion. However, the bacterial surface coverage of SLIPS was only 0.23% after 14 days of immersion with an adhesion inhibition rate of 98.69%, which was lower than that of the static conditions. This is because the shear force generated by the water flow on the SLIPS under the dynamic environments can easily wash away the attached Pseudoalteromonas sp., thus enhancing the effect of inhibiting bacterial adhesion. The static and dynamic anti-fouling results showed that SLIPS has an excellent anti-fouling performance with an adhesion inhibition efficiency of more than 98%.

Figure 10 
                  Histogram of bacterial coverage rate on the surface of different samples after immersion in bacterial solution for 3, 7, and 14 days under static conditions (a) and dynamic conditions (b).
Figure 10

Histogram of bacterial coverage rate on the surface of different samples after immersion in bacterial solution for 3, 7, and 14 days under static conditions (a) and dynamic conditions (b).

3.5 Anti-corrosion performance of SLIPS

Q235 carbon steel is easy to corrode in marine environments due to the erosion of corrosive media and the settlement of marine organisms. Herein, EIS was used to characterize the corrosion protection performance of the bare Q235 carbon steel, SHS, and SLIPS after immersion in Pseudoalteromonas sp. culture solution. Figure 11 shows the EIS results of the bare sample (BS), SHS, and SLIPS after immersion in Pseudoalteromonas sp. culture solution for 2 h. Generally, the larger the capacitive reactance arc radius in the Nyquist plots, the better the corrosion resistance of the surfaces. As can be seen in Figure 11a and b, the capacitive reactance arc radius of SLIPS is much larger than that of the SHS and BS, indicating better anti-corrosion performance of the SLIPS.

Figure 11 
                  EIS results and fitted plots of the BS, SHS, and SLIPS after immersion in Pseudoalteromonas sp. culture solution for 2 h: Nyquist plots (a and b); Bode-|Z| versus frequency plots (c); and Bode-phase angle plots (d).
Figure 11

EIS results and fitted plots of the BS, SHS, and SLIPS after immersion in Pseudoalteromonas sp. culture solution for 2 h: Nyquist plots (a and b); Bode-|Z| versus frequency plots (c); and Bode-phase angle plots (d).

Usually, the |Z|0.01 Hz value in the Bode plots is a semi-quantitative indicator of corrosion resistance, and a higher |Z|0.01 Hz value indicates a superior anti-corrosion performance (3840). Figure 11c shows that the |Z|0.01 Hz value of SLIPS was 8.74 × 1010 Ω·cm2, which was eight orders of magnitude higher than that of bare Q235 carbon steel (|Z|0.01 Hz = 7.12 × 102 Ω·cm2), and two orders of magnitude higher than that of SHS (|Z|0.01 Hz = 3.83 × 108 Ω·cm2). These results indicated that SLIPS had the best corrosion protection performance as compared with the bare Q235 carbon steel and SHS. The bare Q235 carbon steel exhibited the lowest slope in the low-frequency region in the Bode plots (Figure 11c), indicating a small interfacial charge transfer occurred at the solution–metal interface. In this case, the corrosive medium can easily corrode the bare Q235 carbon steel (41). The increase in the slope of the bare Q235 carbon steel in the intermediate frequency region in the Bode plots is caused by surface-attached biofilms and corrosion products (42). As shown in Figure 9d, BS showed the lowest phase angle in the high-frequency region and SLIPS showed a wide and high phase angle in the high-medium frequency regions, indicating that the corrosive media was difficult to invade the SLIPS interface (43). This result showed the SLIPS had an excellent anti-corrosion performance.

The EIS results were further evaluated by equivalent circuit models to make a more quantitative comparison. For the BS, SHS, and SLIPS, two-time constants can be observed in the Bode phase angle vs frequency plot; namely, the formation of the corrosion layer (corrosion products and biofilm layer, SHS or SLIPS layer) at the high-medium frequency ranges and the corroded interface at the low-frequency ranges (44). Therefore, the EIS results of BS can be fitted by the equivalent circuit model shown in Figure 12a, and the EIS results of SHS and SLIPS can be fitted by the equivalent circuit model shown in Figure 12b. In these two circuits, R s represents the solution resistance, R f represents the resistance of the film layer (corrosion products and biofilm layers, SHS or SLIPS film layer), R ct is the charge transfer resistance of the corroded interface, and CPEf and CPEdl are used to simulate the constant phase elements of the film layers and the electric double layer, respectively (40).

Figure 12 
                  Equivalent circuit diagram of BS (a), SHS and SLIPS (b) used to simulate EIS test results.
Figure 12

Equivalent circuit diagram of BS (a), SHS and SLIPS (b) used to simulate EIS test results.

The fitted electrochemical parameters of the BS, SHS, and SLIPS after immersion in Pseudoalteromonas sp. culture solution for 2 h are shown in Table 1. Besides the values of |Z|0.01 Hz, R ct is an important parameter that directly reflects the anti-corrosion performance of the materials. Generally, a larger R ct represents fewer electron transfers, which corresponds to better anti-corrosion performance. The R ct value of SLPIS is 3.31 × 109 Ω·cm2, which is about seven orders of magnitude higher than that of BS (7.63 × 102 Ω·cm2), indicating that the SLIPS exhibits excellent anti-corrosion performance. Typically, the R ct analysis of SLPIS is consistent with the results of the semi-quantitative comparison of |Z|0.01 Hz values.

Table 1

EIS fitting results of three samples soaked in bacterial solution for 2 h

Samples CPEf CPEdl
Y−1·s n ·cm−2) n R f Y−1·s n ·cm−2) n R ct (Ω·cm−2)
BS 2.18 × 10−5 0.7582 7.18 1.73 × 10−3 0.7625 7.63 × 102
SHS 6.52 × 10−11 1 3.62 × 107 1.22 × 10−8 0.6604 7.87 × 108
SLIPS 8.07 × 10−11 0.9859 1.68 × 1011 9.23 × 10−11 0.9801 3.31 × 109

Durability is one of the key factors that restrict SLIPS for practical application. To study the durability of applying SLIPS for corrosion protection, EIS measurements of SLIPS immersed in the bacterial culture solution for 2 h, 3, 7, and 14 days were evaluated, as shown in Figure 13. The |Z|0.01 Hz values of SLIPS exhibit a slight decrease with the increased time of immersion. The |Z|0.01 Hz value of SLIPS after 14 days of immersion is 4.89 × 1010 Ω·cm2, indicating that the SLIPS had a stable anti-corrosion performance. The EIS results were further fitted by the equivalent circuit model shown in Figure 13d due to the same electrochemical character of SLIPS, and the fitted electrochemical parameters of SLIPS at different days of immersion are shown in Table 2. The R ct value of SLIPS after 14 days of immersion slightly dropped to 1.57 × 109 Ω·cm2, which corresponds to the corrosion inhibition efficiency of 99.99%, indicating that the SLIPS had an excellent and stable anti-corrosion performance after the long-term immersion.

Figure 13 
                  Results and fitted plots of the BS, SHS, and SLIPS after immersion in Pseudoalteromonas sp. culture solution for 2 h, 3 days, 7 days, and 14 days: Nyquist plots (a); Bode-|Z| versus frequency plots (b); Bode-phase angle plots (c); and equivalent circuit (d).
Figure 13

Results and fitted plots of the BS, SHS, and SLIPS after immersion in Pseudoalteromonas sp. culture solution for 2 h, 3 days, 7 days, and 14 days: Nyquist plots (a); Bode-|Z| versus frequency plots (b); Bode-phase angle plots (c); and equivalent circuit (d).

Table 2

EIS fitting results of three samples soaked in bacterial solution for 2 h

Samples CPEf CPEdl
Y−1·s n ·cm−2) n R f Y−1·s n ·cm−2) n R ct (Ω·cm−2)
BS 2.18 × 10−5 0.7582 7.18 1.73 × 10−3 0.7625 7.63 × 102
SHS 6.52 × 10−11 1 3.62 × 107 1.22 × 10−8 0.6604 7.87 × 108
SLIPS 8.07 × 10−11 0.9859 1.68 × 1011 9.23 × 10−11 0.9801 3.31 × 109

In addition to the EIS experiment, the potentiodynamic polarization experiment was also utilized to quantitatively evaluate the corrosion resistance behavior of SLIPS. The polarization curve described the relationship between corrosion current density (I corr.) and corrosion potential (E corr.). Generally, the coating with higher corrosion potential and lower corrosion current density possessed superior anti-corrosion performance. After immersion for 14 days in Pseudoalteromonas sp. culture solution, as shown in Figure 14, the E corr. of bare Q235 carbon steel and SLIPS was −0.67 and −0.48 V, respectively, indicating that the bare Q235 carbon steel is more tend to be corroded compared with SLIPS surface coated substrate. Besides, the I corr. of bare Q235 carbon steel and SLIPS was 4.37  ×  10−6 and 1.15  ×  10−8 A·cm−2, respectively. It was obvious that the I corr. of SLIPS was two orders of magnitude lower than that of Q235 carbon steel. This result further demonstrated that SLIPS could effectively mitigate the corrosion rate of the underlying substrate in Pseudoalteromonas sp. culture solution.

Figure 14 
                  Polarization curves of bare Q235 and SLIPS samples after immersion in Pseudoalteromonas sp. culture solution for 14 days.
Figure 14

Polarization curves of bare Q235 and SLIPS samples after immersion in Pseudoalteromonas sp. culture solution for 14 days.

4 Conclusion

In summary, we developed a novel and efficient method for fabricating SLIPS on the surface of base materials. The hydrophobic modification of nano-SiO2 can be quickly completed under mild conditions by thiol-ene click chemical reaction, and then SLIPS was successfully prepared by injecting silicone oil as a lubricant into the superhydrophobic rough structure. Through the universal spraying method, SLIPS can be quickly constructed on different shapes and material surfaces. The surface wettability results show that 10 μL water droplets can slip on the SLIPS and stained water droplets can slip without any stain mark, which proves that the SLIPS has an excellent slippery property. In addition, the anti-fouling test shows that the SLIPS has a value of 98.56% and 98.69% of bacterial attachment inhibition efficiency under static and dynamic conditions, respectively. This is due to the slippery lubricating oil film forms a molecular-level slippery surface that can effectively hinder the attachment and infiltration of bacteria during immersion in Pseudoalteromonas sp. culture solution. The EIS test showed that SLIPS possess stable and excellent anti-corrosion properties after immersion in Pseudoalteromonas sp. culture solution, the |Z|0.01 Hz value is 4.89 × 1010 Ω·cm2 and the corrosion inhibition efficiency is 99.99%. This study offers a practical and simple method to prevent the MIC of steel in marine environment. Meanwhile, the conclusions in this work provide rational guidelines for the optimization of slippery surface for long-term anti-corrosion and anti-fouling applications.


# Xuezhun Gu and Hao Jiang contributed equally to this work.


Acknowledgments

The authors thank China’s National Natural Science Foundation for its research funding.

  1. Funding information: This work was supported by the National Natural Science Foundation of China (52261045, 51963008).

  2. Author contributions: Xuezhun Gu: data curation, formal analysis, methodology, writing – original draft, writing – review & editing; Hao Jiang: data curation, formal analysis, methodology, validation, writing – review & editing; Xiaotong Chen: writing – review & editing; Yu Li: writing – review & editing; Guoqing Wang: funding acquisition, supervision, writing – review & editing.

  3. Conflict of interest: The authors state no conflict of interest.

  4. Data availability statement: The raw/processed data are available from the corresponding author on a reasonable request.

References

(1) Jiang H, Wang W, Li J, Zhu L, Zhang D, Wang P, et al. Fabrication of novel self-healable ultraslippery surface for preventing marine microbiologically influenced corrosion. J Ind Eng Chem. 2022;109:320–9.10.1016/j.jiec.2022.01.040Search in Google Scholar

(2) Ma Y, Zhang Y, Zhang R, Guan F, Hou B, Duan J. Microbiologically influenced corrosion of marine steels within the interaction between steel and biofilms: a brief view. Appl Microbiol Biotechnol. 2020;104:515–25.10.1007/s00253-019-10184-8Search in Google Scholar PubMed

(3) Zhang P, Xu D, Li Y, Yang K, Gu T. Electron mediators accelerate the microbiologically influenced corrosion of 304 stainless steel by the Desulfovibrio vulgaris biofilm. Bioelectrochem. 2015;101:14–21.10.1016/j.bioelechem.2014.06.010Search in Google Scholar PubMed

(4) Fang Z, Wang G, Xiong Y, Li J, Yang Y, Huang L, et al. Anti-corrosion performance of polyaniline coated basalt rockwool wastes/epoxy resin coatings. Coat. 2021;11:463.10.3390/coatings11040463Search in Google Scholar

(5) Ye Y, Yang D, Zhang D, Chen H, Zhao H, Li X, et al. POSS-tetraaniline modified graphene for active corrosion protection of epoxy-based organic coating. Chem Eng J. 2020;383:123160.10.1016/j.cej.2019.123160Search in Google Scholar

(6) Aguirre J, Daille L, Fischer DA, Galarce C, Pizarro G, Vargas I, et al. Study of poly(3,4-ethylendioxythiphene) as a coating for mitigation of biocorrosion of AISI 304 stainless steel in natural seawater. Prog Org Coat. 2017;113:175–84.10.1016/j.porgcoat.2017.09.009Search in Google Scholar

(7) Manoharan RK, Ayyaru S, Ahn Y-H. Auto-cleaning functionalization of the polyvinylidene fluoride membrane by the biocidal oxine/TiO 2 nanocomposite for anti-biofouling properties. New J Chem. 2020;44:807–16.10.1039/C9NJ05300JSearch in Google Scholar

(8) Che Z, Purushotham S, Cho K, Sontag D, Liu Y. Recurrent neural networks for multivariate time series with missing values. Sci Rep. 2018;8:6085.10.1038/s41598-018-24271-9Search in Google Scholar PubMed PubMed Central

(9) Park I-C, Kim S-J. Determination of corrosion protection current density requirement of zinc sacrificial anode for corrosion protection of AA5083-H321 in seawater. Appl Surf Sci. 2020;509:145346.10.1016/j.apsusc.2020.145346Search in Google Scholar

(10) Sun H, Liu L, Li Y, Ma L, Yan Y. The performance of Al–Zn–In–Mg–Ti sacrificial anode in simulated deep water environment. Corros Sci. 2013;77:77–87.10.1016/j.corsci.2013.07.029Search in Google Scholar

(11) Xiong Y, Fang Z, Hu D, Jiang H, Huang L, Mao Q, et al. Nano-CeO2-loaded polyzwitterionic double-network high-strengh hydrogel for highly enhanced synergistic marine antifouling. ACS Appl Mater Interfaces. 2023;15:38795–807.10.1021/acsami.3c06741Search in Google Scholar PubMed

(12) Pringle JH, Fletcher M. Influence of Substratum Wettability on Attachment of Freshwater Bacteria to Solid Surfaces. Appl Environ Microbiol. 1983;45:811–7.10.1128/aem.45.3.811-817.1983Search in Google Scholar PubMed PubMed Central

(13) Huggett MJ, Nedved BT, Hadfield MG. Effects of initial surface wettability on biofilm formation and subsequent settlement of Hydroides elegans. Biofouling. 2009;25:387–99.10.1080/08927010902823238Search in Google Scholar PubMed

(14) Wong T-S, Kang SH, Tang SK, Smythe EJ, Hatton BD, Grinthal A, et al. Bioinspired self-repairing slippery surfaces with pressure-stable omniphobicity. Nature. 2011;477:443–7.10.1038/nature10447Search in Google Scholar PubMed

(15) Tesler AB, Kim P, Kolle S, Howell C, Ahanotu O, Aizenberg J. Extremely durable biofouling-resistant metallic surfaces based on electrodeposited nanoporous tungstite films on steel. Nat Commun. 2015;6:8649.10.1038/ncomms9649Search in Google Scholar PubMed PubMed Central

(16) Wang N, Xiong D, Lu Y, Pan S, Wang K, Deng Y, et al. Design and Fabrication of the Lyophobic Slippery Surface and Its Application in Anti-Icing. The Journal of Physical Chemistry C. 2016;120:11054–59.10.1021/acs.jpcc.6b04778Search in Google Scholar

(17) Epstein AK, Wong T-S, Belisle RA, Boggs EM, Aizenberg J. Liquid-infused structured surfaces with exceptional anti-biofouling performance. Proc Natl Acad Sci 2012;109:13182–7.10.1073/pnas.1201973109Search in Google Scholar PubMed PubMed Central

(18) Kim P, Wong T-S, Alvarenga J, Kreder MJ, Adorno-Martinez WE, Aizenberg J. Liquid-infused nanostructured surfaces with extreme anti-ice and anti-frost performance. ACS Nano. 2012;6:6569–77.10.1021/nn302310qSearch in Google Scholar PubMed

(19) Shi Z, Ouyang Y, Qiu R, Hu S, Zhang Y, Chen M, et al. Bioinspired superhydrophobic and oil-infused nanostructured surface for Cu corrosion inhibition: A comparison study. Prog Org Coat. 2019;131:49–59.10.1016/j.porgcoat.2019.02.004Search in Google Scholar

(20) Li B, Xue S, Mu P, Li J. Robust self-healing graphene oxide-based superhydrophobic coatings for efficient corrosion protection of magnesium alloys. ACS Appl Mater Interfaces. 2022;14:30192–204.10.1021/acsami.2c06447Search in Google Scholar PubMed

(21) Xue S, Li B, Mu P, Li J. Designing attapulgite-based self-healing superhydrophobic coatings for efficient corrosion protection of magnesium alloys. Prog Org Coat. 2022;170:106966.10.1016/j.porgcoat.2022.106966Search in Google Scholar

(22) Li J, Guo Q, Lu Y, Nie G. Polyindole vertical nanowire array based electrochromic-supercapacitor difunctional device for energy storage and utilization. Eur Polym J. 2019;113:29–35.10.1016/j.eurpolymj.2019.01.011Search in Google Scholar

(23) Wang P, Zhang D, Lu Z, Sun S. Fabrication of slippery lubricant-infused porous surface for inhibition of microbially influenced corrosion. ACS Appl Mater Interfaces. 2016;8:1120–7.10.1021/acsami.5b08452Search in Google Scholar PubMed

(24) Wang P, Zhang D, Sun S, Li T, Sun Y. Fabrication of slippery lubricant-infused porous surface with high underwater transparency for the control of marine biofouling. ACS Appl Mater Interfaces. 2017;9:972–82.10.1021/acsami.6b09117Search in Google Scholar PubMed

(25) Li H, Feng X, Peng Y, Zeng R. Durable lubricant-infused coating on a magnesium alloy substrate with anti-biofouling and anti-corrosion properties and excellent thermally assisted healing ability. Nanoscale. 2020;12:7700–11.10.1039/C9NR10699ESearch in Google Scholar PubMed

(26) Xiang T, Zheng S, Zhang M, Sadig HR, Li C. Bioinspired slippery zinc phosphate coating for sustainable corrosion protection. ACS Sustain Chem Eng. 2018;6:10960–8.10.1021/acssuschemeng.8b02345Search in Google Scholar

(27) Liang Y, Li C, Wang P, Zhang D. Fabrication of a robust slippery liquid infused porous surface on Q235 carbon steel for inhibiting microbiologically influenced corrosion. Colloids Surf A: Physicochem Eng Aspects. 2021;631:127696.10.1016/j.colsurfa.2021.127696Search in Google Scholar

(28) Yao W, Wu L, Sun L, Jiang B, Pan F. Recent developments in slippery liquid-infused porous surface. Prog Org Coat. 2022;166:106806.10.1016/j.porgcoat.2022.106806Search in Google Scholar

(29) Niu XZ, Peng SL, Liu LY, Wen WJ, Sheng P. Characterizing and patterning of PDMS-based conducting composites. Adv Mater. 2007;19:2682–6.10.1002/adma.200602515Search in Google Scholar

(30) Preston DJ, Song Y, Lu Z, Antao DS, Wang EN. Design of lubricant infused surfaces. ACS Appl Mater Interfaces. 2017;9:42383–92.10.1021/acsami.7b14311Search in Google Scholar PubMed

(31) Yu M, Liu M, Zhang L, Li M, Hou Y, Wang D, et al. Liquid-repellent and self-repairing lubricant-grafted surfaces constructed by thiol-ene click chemistry using activated hollow silica as the lubricant reservoir. J Colloid Interface Sci. 2021;586:279–91.10.1016/j.jcis.2020.10.091Search in Google Scholar PubMed

(32) Khdary NH, Howard AG. New solid-phase-nanoscavenger for the analytical enrichment of mercury from water. Analyst. 2011;136:3004–9.10.1039/c1an15075hSearch in Google Scholar PubMed

(33) Song BY, Eom Y, Lee TG. Removal and recovery of mercury from aqueous solution using magnetic silica nanocomposites. Appl Surf Sci. 2011;257:4754–9.10.1016/j.apsusc.2010.12.156Search in Google Scholar

(34) Zhang S, Zhang Y, Liu J, Xu Q, Xiao H, Wang X, et al. Thiol modified Fe3O4@SiO2 as a robust, high effective, and recycling magnetic sorbent for mercury removal. Chem Eng J. 2013;226:30–8.10.1016/j.cej.2013.04.060Search in Google Scholar

(35) Wang X, Ding H, Sun S, Zhang H, Zhou R, Li Y, et al. Preparation of a temperature-sensitive superhydrophobic self-cleaning SiO2-TiO2@PDMS coating with photocatalytic activity. Surf Coat Technol. 2021;408:126853.10.1016/j.surfcoat.2021.126853Search in Google Scholar

(36) Yu M, Liu M, Hou Y, Fu S, Zhang L, Li M, et al. Covalently grafted liquids for transparent and omniphobic surfaces via thiol-ene click chemistry. J Mater Sci. 2020;55:12811–25.10.1007/s10853-020-04929-4Search in Google Scholar

(37) Wang P, Lu Z, Zhang D. Slippery liquid-infused porous surfaces fabricated on aluminum as a barrier to corrosion induced by sulfate reducing bacteria. Corros Sci. 2015;93:159–66.10.1016/j.corsci.2015.01.015Search in Google Scholar

(38) Ouyang Y, Cao Q, Li B, Miller RHB, Qiu R, Yang X, et al. Nanofluid-infused slippery surface: Bioinspired coating on Zn with high corrosion inhibition performance. Colloids Surf A: Physicochem Eng Aspects. 2021;608:125492.10.1016/j.colsurfa.2020.125492Search in Google Scholar

(39) Chen X, Wang P, Zhang D. Designing a superhydrophobic surface for enhanced atmospheric corrosion resistance based on coalescence-induced droplet jumping behavior. ACS Appl Mater Interfaces. 2019;11:38276–84.10.1021/acsami.9b11415Search in Google Scholar PubMed

(40) Sun H, Lei F, Li T, Han H, Li B, Li D, et al. Facile fabrication of novel multifunctional lubricant-infused surfaces with exceptional tribological and anticorrosive properties. ACS Appl Mater Interfaces. 2021;13:6678–87.10.1021/acsami.0c21667Search in Google Scholar PubMed

(41) Xiang T, Liu J, Liu Q, Wei F, Lv Z, Yang Y, et al. Self-healing solid slippery surface with porous structure and enhanced corrosion resistance. Chem Eng J. 2021;417:128083.10.1016/j.cej.2020.128083Search in Google Scholar

(42) Moradi M, Ye S, Song Z. Dual role of Psudoalteromonas piscicida biofilm for the corrosion and inhibition of carbon steel in artificial seawater. Corros Sci. 2019;152:10–9.10.1016/j.corsci.2019.02.025Search in Google Scholar

(43) Xiang T, Zhang M, Sadig HR, Li Z, Zhang M, Dong C, et al. Slippery liquid-infused porous surface for corrosion protection with self-healing property. Chem Eng J. 2018;345:147–55.10.1016/j.cej.2018.03.137Search in Google Scholar

(44) Wang P, Zhang D, Qiu R, Wu J. Super-hydrophobic metal-complex film fabricated electrochemically on copper as a barrier to corrosive medium. Corros Sci. 2014;83:317–26.10.1016/j.corsci.2014.02.028Search in Google Scholar

Received: 2023-08-08
Revised: 2023-09-25
Accepted: 2023-09-25
Published Online: 2023-11-06

© 2023 the author(s), published by De Gruyter

This work is licensed under the Creative Commons Attribution 4.0 International License.

Articles in the same Issue

  1. Research Articles
  2. Chitosan nanocomposite film incorporating Nigella sativa oil, Azadirachta indica leaves’ extract, and silver nanoparticles
  3. Effect of Zr-doped CaCu3Ti3.95Zr0.05O12 ceramic on the microstructure, dielectric properties, and electric field distribution of the LDPE composites
  4. Effects of dry heating, acetylation, and acid pre-treatments on modification of potato starch with octenyl succinic anhydride (OSA)
  5. Loading conditions impact on the compression fatigue behavior of filled styrene butadiene rubber
  6. Characterization and compatibility of bio-based PA56/PET
  7. Study on the aging of three typical rubber materials under high- and low-temperature cyclic environment
  8. Numerical simulation and experimental research of electrospun polyacrylonitrile Taylor cone based on multiphysics coupling
  9. Experimental investigation of properties and aging behavior of pineapple and sisal leaf hybrid fiber-reinforced polymer composites
  10. Influence of temperature distribution on the foaming quality of foamed polypropylene composites
  11. Enzyme-catalyzed synthesis of 4-methylcatechol oligomer and preliminary evaluations as stabilizing agent in polypropylene
  12. Molecular dynamics simulation of the effect of the thermal and mechanical properties of addition liquid silicone rubber modified by carbon nanotubes with different radii
  13. Incorporation of poly(3-acrylamidopropyl trimethylammonium chloride-co-acrylic acid) branches for good sizing properties and easy desizing from sized cotton warps
  14. Effect of matrix composition on properties of polyamide 66/polyamide 6I-6T composites with high content of continuous glass fiber for optimizing surface performance
  15. Preparation and properties of epoxy-modified thermosetting phenolic fiber
  16. Thermal decomposition reaction kinetics and storage life prediction of polyacrylate pressure-sensitive adhesive
  17. Effect of different proportions of CNTs/Fe3O4 hybrid filler on the morphological, electrical and electromagnetic interference shielding properties of poly(lactic acid) nanocomposites
  18. Doping silver nanoparticles into reverse osmosis membranes for antibacterial properties
  19. Melt-blended PLA/curcumin-cross-linked polyurethane film for enhanced UV-shielding ability
  20. The affinity of bentonite and WO3 nanoparticles toward epoxy resin polymer for radiation shielding
  21. Prolonged action fertilizer encapsulated by CMC/humic acid
  22. Preparation and experimental estimation of radiation shielding properties of novel epoxy reinforced with Sb2O3 and PbO
  23. Fabrication of polylactic acid nanofibrous yarns for piezoelectric fabrics
  24. Copper phenyl phosphonate for epoxy resin and cyanate ester copolymer with improved flame retardancy and thermal properties
  25. Synergistic effect of thermal oxygen and UV aging on natural rubber
  26. Effect of zinc oxide suspension on the overall filler content of the PLA/ZnO composites and cPLA/ZnO composites
  27. The role of natural hybrid nanobentonite/nanocellulose in enhancing the water resistance properties of the biodegradable thermoplastic starch
  28. Performance optimization of geopolymer mortar blending in nano-SiO2 and PVA fiber based on set pair analysis
  29. Preparation of (La + Nb)-co-doped TiO2 and its polyvinylidene difluoride composites with high dielectric constants
  30. Effect of matrix composition on the performance of calcium carbonate filled poly(lactic acid)/poly(butylene adipate-co-terephthalate) composites
  31. Low-temperature self-healing polyurethane adhesives via dual synergetic crosslinking strategy
  32. Leucaena leucocephala oil-based poly malate-amide nanocomposite coating material for anticorrosive applications
  33. Preparation and properties of modified ammonium polyphosphate synergistic with tris(2-hydroxyethyl) isocynurate for flame-retardant LDPE
  34. Thermal response of double network hydrogels with varied composition
  35. The effect of coated calcium carbonate using stearic acid on the recovered carbon black masterbatch in low-density polyethylene composites
  36. Investigation of MXene-modified agar/polyurethane hydrogel elastomeric repair materials with tunable water absorption
  37. Damping performance analysis of carbon black/lead magnesium niobite/epoxy resin composites
  38. Molecular dynamics simulations of dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate (TKX-50) and TKX-50-based PBXs with four energetic binders
  39. Preparation and characterization of sisal fibre reinforced sodium alginate gum composites for non-structural engineering applications
  40. Study on by-products synthesis of powder coating polyester resin catalyzed by organotin
  41. Ab initio molecular dynamics of insulating paper: Mechanism of insulating paper cellobiose cracking at transient high temperature
  42. Effect of different tin neodecanoate and calcium–zinc heat stabilizers on the thermal stability of PVC
  43. High-strength polyvinyl alcohol-based hydrogel by vermiculite and lignocellulosic nanofibrils for electronic sensing
  44. Impacts of micro-size PbO on the gamma-ray shielding performance of polyepoxide resin
  45. Influence of the molecular structure of phenylamine antioxidants on anti-migration and anti-aging behavior of high-performance nitrile rubber composites
  46. Fiber-reinforced polyvinyl alcohol hydrogel via in situ fiber formation
  47. Preparation and performance of homogenous braids-reinforced poly (p-phenylene terephthamide) hollow fiber membranes
  48. Synthesis of cadmium(ii) ion-imprinted composite membrane with a pyridine functional monomer and characterization of its adsorption performance
  49. Impact of WO3 and BaO nanoparticles on the radiation shielding characteristics of polydimethylsiloxane composites
  50. Comprehensive study of the radiation shielding feature of polyester polymers impregnated with iron filings
  51. Preparation and characterization of polymeric cross-linked hydrogel patch for topical delivery of gentamicin
  52. Mechanical properties of rCB-pigment masterbatch in rLDPE: The effect of processing aids and water absorption test
  53. Pineapple fruit residue-based nanofibre composites: Preparation and characterizations
  54. Effect of natural Indocalamus leaf addition on the mechanical properties of epoxy and epoxy-carbon fiber composites
  55. Utilization of biosilica for energy-saving tire compounds: Enhancing performance and efficiency
  56. Effect of capillary arrays on the profile of multi-layer micro-capillary films
  57. A numerical study on thermal bonding with preheating technique for polypropylene microfluidic device
  58. Development of modified h-BN/UPE resin for insulation varnish applications
  59. High strength, anti-static, thermal conductive glass fiber/epoxy composites for medical devices: A strategy of modifying fibers with functionalized carbon nanotubes
  60. Effects of mechanical recycling on the properties of glass fiber–reinforced polyamide 66 composites in automotive components
  61. Bentonite/hydroxyethylcellulose as eco-dielectrics with potential utilization in energy storage
  62. Study on wall-slipping mechanism of nano-injection polymer under the constant temperature fields
  63. Synthesis of low-VOC unsaturated polyester coatings for electrical insulation
  64. Enhanced apoptotic activity of Pluronic F127 polymer-encapsulated chlorogenic acid nanoparticles through the PI3K/Akt/mTOR signaling pathway in liver cancer cells and in vivo toxicity studies in zebrafish
  65. Preparation and performance of silicone-modified 3D printing photosensitive materials
  66. A novel fabrication method of slippery lubricant-infused porous surface by thiol-ene click chemistry reaction for anti-fouling and anti-corrosion applications
  67. Development of polymeric IPN hydrogels by free radical polymerization technique for extended release of letrozole: Characterization and toxicity evaluation
  68. Tribological characterization of sponge gourd outer skin fiber-reinforced epoxy composite with Tamarindus indica seed filler addition using the Box–Behnken method
  69. Stereocomplex PLLA–PBAT copolymer and its composites with multi-walled carbon nanotubes for electrostatic dissipative application
  70. Enhancing the therapeutic efficacy of Krestin–chitosan nanocomplex for cancer medication via activation of the mitochondrial intrinsic pathway
  71. Variation in tungsten(vi) oxide particle size for enhancing the radiation shielding ability of silicone rubber composites
  72. Damage accumulation and failure mechanism of glass/epoxy composite laminates subjected to repeated low velocity impacts
  73. Gamma-ray shielding analysis using the experimental measurements for copper(ii) sulfate-doped polyepoxide resins
  74. Numerical simulation into influence of airflow channel quantities on melt-blowing airflow field in processing of polymer fiber
  75. Cellulose acetate oleate-reinforced poly(butylene adipate-co-terephthalate) composite materials
  76. Radiation shielding capability and exposure buildup factor of cerium(iv) oxide-reinforced polyester resins
  77. Recyclable polytriazole resins with high performance based on Diels-Alder dynamic covalent crosslinking
  78. Adsorption and recovery of Cr(vi) from wastewater by Chitosan–Urushiol composite nanofiber membrane
  79. Comprehensive performance evaluation based on electromagnetic shielding properties of the weft-knitted fabrics made by stainless steel/cotton blended yarn
  80. Review Articles
  81. Preparation and application of natural protein polymer-based Pickering emulsions
  82. Wood-derived high-performance cellulose structural materials
  83. Flammability properties of polymers and polymer composites combined with ionic liquids
  84. Polymer-based nanocarriers for biomedical and environmental applications
  85. A review on semi-crystalline polymer bead foams from stirring autoclave: Processing and properties
  86. Rapid Communication
  87. Preparation and characterization of magnetic microgels with linear thermosensitivity over a wide temperature range
  88. Special Issue: Biodegradable and bio-based polymers: Green approaches (Guest Editors: Kumaran Subramanian, A. Wilson Santhosh Kumar, and Venkatajothi Ramarao)
  89. Synthesis and characterization of proton-conducting membranes based on bacterial cellulose and human nail keratin
  90. Fatigue behaviour of Kevlar/carbon/basalt fibre-reinforced SiC nanofiller particulate hybrid epoxy composite
  91. Effect of citric acid on thermal, phase morphological, and mechanical properties of poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide)/thermoplastic starch blends
  92. Dose-dependent cytotoxicity against lung cancer cells via green synthesized ZnFe2O4/cellulose nanocomposites
Downloaded on 10.9.2025 from https://www.degruyterbrill.com/document/doi/10.1515/epoly-2023-0116/html
Scroll to top button