多层复合聚乳酸薄膜的阻隔性和力学性能  

Barrier and Mechanical Properties of Poly( L-Lactide) Multilayer Films

作　　者：董同力嘎 王爽爽[1] 孙文秀[1] 成培芳[1] 靳烨[1] 

机构地区：[1]内蒙古农业大学食品科学与工程学院,内蒙古呼和浩特010018

出　　处：《高分子材料科学与工程》2015年第8期177-181,共5页Polymer Materials Science & Engineering

基　　金：留学回国人员科研启动基金(46);国家自然科学基金资助项目(51163010)

摘　　要：将聚乙烯醇(PVA)作为中间层与聚乳酸(PLLA)复合,制备生物可降解三层复合膜,以提高PLLA薄膜的阻隔性。通过测试PLLA复合膜的热学性质、力学性能、氧气阻隔性和水蒸气阻隔性,分析了三层复合膜的包装特性。结果表明,当PVA层占复合膜的比例为10%时,PLLA/PVA/PLLA的氧气透过率(OTR)值为1.01 cm3/m2·d,阻氧性提高了近110倍。且中间层占复合膜比例越大,阻隔性提高越明显。同时,PVA中间层也增强了PLLA复合膜的强度、韧性和刚性。Poly（ L-Lactide）（ PLLA） and poly（ vinly alcohol）（ PVA） were used to prepare biodegradable three-layer PPC / PVA / PPC films with high barrier and tensile properties,and its thermostability,mechanical and barrier properties were evaluated respectively. A small oxygen transmission rate of 1. 01 cm^3/ m^2·d is observed for the PLLA/PVA（ 10%） /PLLA film,showing that the oxygen barrier property of the PLLA film is enhanced by almost 110 times. With increasing the PVA concentration,the higher barrier property of the films is obtained. Meanwhile,the mechanical properties of the multilayer films are enhanced obviously.

关 键 词：阻隔性 聚乳酸 聚乙烯醇 生物可降解 力学性能 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业]