Biodegradable composites with improved barrier properties and transparency from the impregnation of PLA to bacterial cellulose membranes

被引：31

作者：

Urbina, Leire ^{[1
]}

Algar, Itxaso ^{[1
]}

Garcia-Astrain, Clara ^{[1
]}

Gabilondo, Nagore ^{[1
]}

Gonzalez, Alba ^{[2
]}

Angeles Corcuera, Ma ^{[1
]}

Eceiza, Arantxa ^{[1
]}

Retegi, Alona ^{[1
]}

机构：

[1] Univ Basque Country, Dept Chem & Environm Engn, Mat Technol Grp, Europa Plaza 1, Donostia San Sebastian 20018, Spain

[2] Univ Basque Country, UPV EHU, POLYMAT, Dept Polymer Sci & Technol, POB 1072, Donostia San Sebastian 20080, Spain

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2016年 / 133卷 / 28期

关键词：

biodegradable; biopolymers and renewable polymers; biosynthesis of polymers; membranes; packaging; HYDROLYTIC DEGRADATION; NANOCOMPOSITES; POLYLACTIDE;

D O I：

10.1002/app.43669

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(lactic acid) (PLA) was impregnated in bacterial cellulose (BC) membranes. BC/PLA films were prepared by solvent casting and mechanical, optical and barrier properties, and biodegradation process were investigated. The transparency of processed films was higher than that of neat BC and increased with PLA content. Moreover, the incorporation of PLA to BC enhanced significantly the water vapor barrier properties of the BC membranes. The bionanocomposites contained a high percentage of cellulose due to the impregnation method that leads to the film with a BC content of 94%, which practically maintains the excellent mechanical properties of BC. However, when increasing the PLA content in the bionanocomposites the mechanical properties decreased slightly with respect to BC. Biodegradation under real soil conditions was determined indirectly through the study of the visual degradation and disintegration, demonstrating that the bionanocomposites were degraded faster than the neat PLA. The successful production of BC/PLA bionanocomposites suggested the possible application of them for active food packaging. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43669.

引用

页数：10

共 40 条

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