Super-Toughed PLA Blown Film with Enhanced Gas Barrier Property Available for Packaging and Agricultural Applications

被引：40

作者：

Jiang, Yuanping ^{[1
]}

Yan, Cong ^{[1
]}

Wang, Kai ^{[1
]}

Shi, Dawei ^{[1
]}

Liu, Zhengying ^{[1
]}

Yang, Mingbo ^{[1
]}

机构：

[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China

来源：

MATERIALS | 2019年 / 12卷 / 10期

基金：

中国国家自然科学基金;

关键词：

PLA; biodegradable films; toughness; film blowing; POLY(LACTIC ACID); STEREOCOMPLEX CRYSTALLITES; NANOCOMPOSITES; PERFORMANCE; PEG;

D O I：

10.3390/ma12101663

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polylactic acid (PLA) holds enormous potential as an alternative to the ubiquitous petroleum-based plastics to be used in packaging film and agricultural film. However, the poor viscoelastic behavior and its extremely low melt strength means it fails to meet the requirements in film blowing processing, which is the most efficient film processing method with the lowest costs. Also, the PLA's brittleness and insufficient gas barrier properties also seriously limit PLA's potential application as a common film material. Herein, special stereocomplex (SC) networks were introduced to improve the melt strength and film blowing stability of PLA; polyethylene glycol (PEG) was introduced to improve PLA's toughness and gas barrier properties. Compared with neat poly(l-lactide) acid (PLLA), modified PLA is stable in the film blowing process and its film elongation at break increases more than 18 times and reaches over 250%, and its O-2 permeability coefficient decreased by 61%. The resulting film material also has good light transmittance, which has great potential for green packaging applications, such as disposable packaging and agricultural films.

引用

页数：10

共 29 条

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