Abstract
Antimicrobial films were prepared by incorporating nano-titanium dioxide (TiO2) modified by silane into soy protein isolate (SPI) films. The effects of different concentrations of modified nano-TiO2 (TiO2-NM) on the physical properties, antimicrobial properties, and microstructure of the SPI-based films were investigated. Attenuated total reflectance Fourier-transform infrared spectroscopy indicated that the interaction between the SPI and TiO2-NM was via hydrogen bonds. Scanning electron microscopy and atomic force microscopy both showed that the microstructure of SPI-based films with TiO2-NM was compact. Moreover, as the content of TiO2-NM increased from 0 to 1.5 g/100 mL, the water vapor permeability and oxygen permeability were decreased from 5.43 to 4.62 g· mm/m2d· kPa and 0.470 to 0.110 g· cm−2· d−1, respectively. An increase from 6.67 MPa to 14.56 MPa in tensile strength and a decrease from 36.53% to 27.62% in elongation at break indicate the optimal mechanical properties of all groups. TiO2-NM films had excellent UV barrier properties, with a whiter surface with increasing TiO2-NM content. In addition, the SPI-based films with TiO2-NM showed antimicrobial activity, as evidenced by an inhibitory zone increasing from 0 to 27.34 mm. Therefore, TiO2-NM can be used as an antimicrobial agent in packaging films.
Acknowledgements
This study was supported by the Postdoctoral research project in Heilongjiang Natural Science Fund Project (C2018026). The author also gratefully acknowledges the financial support from Heilongjiang province (No.LBH-Q16019); Postdoctoral research project in 2016 Northeast Agricultural University Academic Key Project (No.16XG21); Colleges and university scientific and technological achievement industrialization of National Natural Science Fund Project (No.31101386);Heilongjiang (Breeding program No.1253CGZH26); Northeast Agricultural University Ph.D. Startup Fund Project (2012RCB02)
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Articles in the same Issue
- Numerical and Experimental Investigation on Forced-Air Cooling of Commercial Packaged Strawberries
- Preparation and Characterization of Soy Protein Isolate Films Incorporating Modified Nano-TiO2
- Identification and Evaluation of Probiotic Potential in Yeast Strains Found in Kefir Drink Samples from Malaysia
- Effect of pH on Protein Extraction from Mahaleb Kernels and Functional Properties of Resulting Protein Concentrate
- Detection of Sesame Oil Adulteration Using Low-Field Nuclear Magnetic Resonance and Chemometrics
- Modelling of Moisture Content, β-Carotene and Deformation Variation during Drying of Carrot
- Production and Storage Properties of Spray-Dried Red Beet Extract Using Polysaccharide-Based Carrier Systems
- Modified Supercritical Carbon Dioxide Extraction of Biologically Active Compounds from Feijoa Sellowiana Leaves
Articles in the same Issue
- Numerical and Experimental Investigation on Forced-Air Cooling of Commercial Packaged Strawberries
- Preparation and Characterization of Soy Protein Isolate Films Incorporating Modified Nano-TiO2
- Identification and Evaluation of Probiotic Potential in Yeast Strains Found in Kefir Drink Samples from Malaysia
- Effect of pH on Protein Extraction from Mahaleb Kernels and Functional Properties of Resulting Protein Concentrate
- Detection of Sesame Oil Adulteration Using Low-Field Nuclear Magnetic Resonance and Chemometrics
- Modelling of Moisture Content, β-Carotene and Deformation Variation during Drying of Carrot
- Production and Storage Properties of Spray-Dried Red Beet Extract Using Polysaccharide-Based Carrier Systems
- Modified Supercritical Carbon Dioxide Extraction of Biologically Active Compounds from Feijoa Sellowiana Leaves