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Issue 13, 2019
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Tough, strong, and biodegradable composite film with excellent UV barrier performance comprising soy protein isolate, hyperbranched polyester, and cardanol derivative

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Abstract

The preparation of strong, tough, and biodegradable soy protein isolate (SPI)-based composite films remains challenging. The simulation of natural structures is highly desirable in the manufacture of synthetic polymer materials because it may significantly improve their mechanical properties and extend their applicability. Herein, we report a facile strategy for preparing a biodegradable SPI-based composite film by incorporating a biomass-derived, water-soluble hyperbranched polyester (HBPE) and a polyfunctional cardanol derivative. The fabricated SPI-based composite film has high tensile strength (11.6 MPa) and an excellent breaking strain (123%). This outstanding performance may be attributed to: the fractional free volume increase arising from the introduction of nanosized cavities into the matrix; the strain-induced orientation crystallization of the SPI-based composite film following incorporation of the polyfunctional cardanol derivative; and the strong intermolecular sacrificial hydrogen bonds and stable covalent bonds confined within the matrix. Furthermore, the biodegradable SPI-based composite film has excellent UV-barrier performance owing to the inclusion of the cardanol derivative.

Graphical abstract: Tough, strong, and biodegradable composite film with excellent UV barrier performance comprising soy protein isolate, hyperbranched polyester, and cardanol derivative

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Article information


Submitted
03 Apr 2019
Accepted
31 May 2019
First published
12 Jun 2019

Green Chem., 2019,21, 3651-3665
Article type
Paper

Tough, strong, and biodegradable composite film with excellent UV barrier performance comprising soy protein isolate, hyperbranched polyester, and cardanol derivative

W. Gu, X. Liu, F. Li, S. Q. Shi, C. Xia, W. Zhou, D. Zhang, S. Gong and J. Li, Green Chem., 2019, 21, 3651
DOI: 10.1039/C9GC01081E

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