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Preparation and Applications of Soybean Residue CNF Films
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Author NameAffiliation
Peiyi Li College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021, China
State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640, China
Key Laboratory of Paper Based Functional Materials of China National Light Industry, Xi’an, Shaanxi Province, 710021, China
Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Xi’an, Shaanxi Province, 710021, China 
Hezhen Liu College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021, China 
Qingqing Hou College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021, China 
Yumeng Wang College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021, China 
Xinping Li College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an, Shaanxi Province, 710021, China
Key Laboratory of Paper Based Functional Materials of China National Light Industry, Xi’an, Shaanxi Province, 710021, China
Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Xi’an, Shaanxi Province, 710021, China 
 
Abstract:In this study, soybean residues were treated with HCl and soybean residue cellulose was extracted, which was used to prepare cellulose nanofiber (CNF) using the high-pressure homogenization method. The maximum yield of CNF, the reaction temperature, reaction time, and HCl concentration were optimized. The optimum HCl concentration for acid treatment was 6%, the reaction time was 60 min, the reaction temperature was 80℃, and the maximum yield of soybean residue cellulose was 78.8%. The different CNF films were then prepared; the color, mechanical property, and light transmittance of the CNF films were studied. Compared to the properties of the CNF film prepared with the soybean residue cellulose by high-pressure homogenization 15 times (HGT-15 film), the mechanical properties of the CNF film with soybean residue cellulose by decolorizing treatment decreased, but the light transmittance increased. The film prepared by adding HGT-15 CNF to whey protein was investigated for its mechanical property, light transmittance, and solubility. Unlike the pure whey protein film, addition of 2.0% CNF to the whey protein enhanced the mechanical property and water vapor transmission rate (WVT) of the film. With the increase in CNF content, the solubility of the whey protein film decreased, and then stabilized.
keywords:acid treatment  soybean residues  CNF  whey protein film
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