Banana fiber-reinforced biodegradable soy protein composites |
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Authors: | Rakesh Kumar Veena Choudhary Saroj Mishra Ik Varma |
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Institution: | (1) Centre for Polymer Science and Engineering, Indian Institute of Technology, Delhi, Hauz Kha, New Delhi, 110016, India;(2) Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology, Delhi, Hauz Khas, New Delhil, 10016, India;(3) Department of Chemistry, Wuhan University, Wuhan, 430072, China |
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Abstract: | Banana fiber, a waste product of banana cultivation, has been used to prepare banana fiber reinforced soy protein composites.
Alkali modified banana fibers were characterized in terms of density, denier and crystallinity index. Fourier transformed
infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) were also performed
on the fibers. Soy protein composites were prepared by incorporating different volume fractions of alkali-treated and untreated
fibers into soy protein isolate (SPI) with different amounts of glycerol (25%–50%) as plasticizer. Composites thus prepared
were characterized in terms of mechanical properties, SEM and water resistance. The results indicate that at 0.3 volume fraction,
tensile strength and modulus of alkali treated fiber reinforced soy protein composites increased to 82% and 963%, respectively,
compared to soy protein film without fibers. Water resistance of the composites increased significantly with the addition
of glutaraldehyde which acts as cross-linking agent. Biodegradability of the composites has also been tested in the contaminated
environment and the composites were found to be 100% biodegradable. |
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Keywords: | Banana fibers soy protein composites glycerol water uptake |
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