Copolymerization of lactic acid for cost-effective PLA synthesis and studies on its improved characteristics

被引：22

作者：

Bishai, Moumita ^{[1
]}

De, Swarnalok ^{[1
]}

Adhikari, Basudam ^{[2
]}

Banerjee, Rintu ^{[1
]}

机构：

[1] Indian Inst Technol, Agr & Food Engn Dept, Microbial Biotechnol & Downstream Proc Lab, Kharagpur 721302, W Bengal, India

[2] Indian Inst Technol, Ctr Mat Sci, Kharagpur 721302, W Bengal, India

来源：

FOOD SCIENCE AND BIOTECHNOLOGY | 2013年 / 22卷 / 01期

关键词：

polylactic acid; fermented broth; humic acid; toughening; biodegradability; crystallinity; DIRECT MELT POLYCONDENSATION; POLYLACTIDE; BEHAVIOR;

D O I：

10.1007/s10068-013-0051-7

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

The present study involves synthesis of polylactic acid (PLA) using purified lactic acid from fermented broth of Jackal jujube (Zizyphus oenophlia). A polyphenolic compound, humic acid (HA) of biological origin was incorporated to the PLA in order to reinforce the PLA chain without compromising its biodegradability and biocompatibility. Under optimized conditions of polymerization, modified L-PLA yield improved up to 93%. The molecular weight was found to be 6.4x10(5). Different physicochemical properties of the polymer were explored for its further application in different fields. Incorporation of intermolecular bond between PLA and HA was confirmed by FT-IR spectroscopy technique. Addition of HA not only reduced the crystallinity of PLA, but also had increased flexibility and elasticity to much greater extent. The results showed that, apart from enhancing the physicochemical properties of PLA, the process also had reduced the production cost of the polymer, while mitigating the demands of environmental protection agencies.

引用

页码：73 / 77

页数：5

共 22 条

[1]

Bishai M, 2012, BIORESOURCE TECHNOL

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