Abstract
Superhydrophobic surfaces have high potential in self-cleaning and oil-water separation applications. We developed a three-step method for the preparation of superhydrophobic filter paper. It involved citric acid (CA) pretreatment to activate cellulose fibers, coating with cellulose nanofibrils/functionalized silica (CNFs/m-SiO2) slurry to increase surface roughness, and grafting of hexadecyltrimethoxysilane (HDTMS) to enhance water resistance. The water contact angle (WCA) and siding angle (SA) of the prepared filter paper reached 151.5° and 7.5°, respectively. The results showed that, compared to the coated filter paper without the added CNFs, the coated paper with CNFs had higher retention of m-SiO2, thus roughness required for superhydrophobic surface was achieved. Further test under frequent abrasion and acid or alkali conditions showed that CA pretreatment improved the durability of superhydrophobic filter paper due to chemical crosslinking between the modified substrate and m-SiO2. Besides, the prepared superhydrophobic filter paper had outstanding self-cleaning property and high oil-water separation efficiency for various oil-water mixtures. Therefore, it is expected to be used for the treatment of oily wastewater.
Funding statement: This work was supported by the key research and development plan of Zhejiang province (Grant No. 2021C01094).
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Conflict of interest: The authors declare no conflicts of interest.
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Supplemental Material
The online version of this article offers supplementary material (https://doi.org/10.1515/npprj-2021-0010).
© 2021 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Chemical pulping
- Visualization of multiscale ring formation in a rotary kiln
- Chemical and morphological characterization and pulping of Casuarina equisetifolia
- Effect of polysulfide pulping process on the energy balance of softwood and hardwood kraft pulp mills
- Bleaching
- Assessment of Q(OP)D(PO) bleachability of softwood kraft pulp
- Mechanical pulping
- The effect of process design on refiner pulp quality control performance
- Paper technology
- Carboxylated bleached kraft pulp from maleic anhydride copolymers
- Sustainable coatings on paper for enhancing barrier properties based on hemicellulose
- Coating
- Fold cracking of coated papers: investigation on automated computer-aided visual assessment method
- The effect of paper coatings containing biopolymer binder and different natural pigments on printability
- Nanotechnology
- Adsorption of biopolymers onto nanocelluloses for the fabrication of hollow microcapsules
- Facile fabrication of superhydrophobic filter paper with improved durability and water repellency
- Evaluation of mulberry branch waste as raw material for nanocellulose synthesis: effects of the synthesis method on product properties
- Chemical technology/modifications
- Tailoring the physical characteristics of solution blown cellulosic nonwovens by various post-treatments
- Miscellaneous
- Refining pulp for tensile strength
- Application of sequencing batch biofilm reactor (SBBR) to recycled paper mill effluent treatment
- Bar forces in pulp refiners
Articles in the same Issue
- Frontmatter
- Chemical pulping
- Visualization of multiscale ring formation in a rotary kiln
- Chemical and morphological characterization and pulping of Casuarina equisetifolia
- Effect of polysulfide pulping process on the energy balance of softwood and hardwood kraft pulp mills
- Bleaching
- Assessment of Q(OP)D(PO) bleachability of softwood kraft pulp
- Mechanical pulping
- The effect of process design on refiner pulp quality control performance
- Paper technology
- Carboxylated bleached kraft pulp from maleic anhydride copolymers
- Sustainable coatings on paper for enhancing barrier properties based on hemicellulose
- Coating
- Fold cracking of coated papers: investigation on automated computer-aided visual assessment method
- The effect of paper coatings containing biopolymer binder and different natural pigments on printability
- Nanotechnology
- Adsorption of biopolymers onto nanocelluloses for the fabrication of hollow microcapsules
- Facile fabrication of superhydrophobic filter paper with improved durability and water repellency
- Evaluation of mulberry branch waste as raw material for nanocellulose synthesis: effects of the synthesis method on product properties
- Chemical technology/modifications
- Tailoring the physical characteristics of solution blown cellulosic nonwovens by various post-treatments
- Miscellaneous
- Refining pulp for tensile strength
- Application of sequencing batch biofilm reactor (SBBR) to recycled paper mill effluent treatment
- Bar forces in pulp refiners