'Green' crosslinking of native starches with malonic acid and their properties

被引：99

作者：

Dastidar, Trina Ghosh ^{[2
]}

Netravali, Anil N. ^{[1
]}

机构：

[1] Cornell Univ, Dept Fiber Sci & Apparel Design, Ithaca, NY 14853 USA

[2] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

来源：

CARBOHYDRATE POLYMERS | 2012年 / 90卷 / 04期

关键词：

Starch resins; Green crosslinking; Esterification; Moisture sensitivity; Mechanical properties; CORN STARCH; BLEND FILMS; POTATO; SUBSTITUTION; DERIVATIVES; ACETATES; FIBERS; SHEETS;

D O I：

10.1016/j.carbpol.2012.07.041

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Starch is a highly hydrophilic biomaterial with weak mechanical properties rendering it useless for commercial applications. A fully 'green' water based process is presented to crosslink corn (cereal) and potato (tuber) starch to enhance mechanical properties as well as lower hydrophilicity. In addition, malonic acid, a green, plant based water soluble and relatively inexpensive polycarboxylic acid, was used as the crosslinker. The reactivity of potato starch toward esterification and crosslinking was found to be higher than that of corn starch owing to the inherent differences in the granule morphology and internal structure of the two starches. It was observed that potato starch granules had a higher degree of substitution (DS) of 0.19 than corn starch granules (DS = 0.1) under similar reaction conditions. Chemical, thermal and mechanical test results confirmed the crosslinking as well as reduced moisture sensitivity. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1620 / 1628

页数：9

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