Biodegradable Biocomposite of Starch Films Cross-Linked with Polyethylene Glycol Diglycidyl Ether and Reinforced by Microfibrillated Cellulose

被引:1
作者
Gonzalez-Perez, Maria M. [1 ]
Lomeli-Ramirez, Maria G. [1 ]
Robledo-Ortiz, Jorge R. [1 ]
Silva-Guzman, Jose A. [1 ]
Manriquez-Gonzalez, Ricardo [1 ]
机构
[1] Univ Guadalajara, Univ Ctr Exact Sci & Engn, Dept Wood Cellulose & Paper, Km 15 5 Guadalajara Nogales Highway, Zapopan 45220, Mexico
关键词
films; biocomposite; microfibrillated cellulose; OCC cardboard; PEGDE cross-linking agent; THERMOPLASTIC STARCH; CASSAVA STARCH; NATURAL FIBERS; PHYSICAL-PROPERTIES; BIO-COMPOSITES; CRYSTALLINITY; LIGNIN; NANOFIBERS; GLYCEROL; ACID;
D O I
10.3390/polym16091290
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Biopolymers are biodegradable and renewable and can significantly reduce environmental impacts. For this reason, biocomposites based on a plasticized starch and cross-linker matrix and with a microfibrillated OCC cardboard cellulose reinforcement were developed. Biocomposites were prepared by suspension casting with varied amounts of microfibrillated cellulose: 0, 4, 8, and 12 wt%. Polyethylene glycol diglycidyl ether (PEGDE) was used as a cross-linking, water-soluble, and non-toxic agent. Microfibrillated cellulose (MFC) from OCC cardboard showed appropriate properties and potential for good performance as a reinforcement. In general, microfiber incorporation and matrix cross-linking increased crystallization, reduced water adsorption, and improved the physical and tensile properties of the plasticized starch. Biocomposites cross-linked with PEGDE and reinforced with 12 wt% MFC showed the best properties. The chemical and structural changes induced by the cross-linking of starch chains and MFC reinforcement were confirmed by FTIR, NMR, and XRD. Biodegradation higher than 80% was achieved for most biocomposites in 15 days of laboratory compost.
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页数:17
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