The Effect of Citric Acid on Physicochemical Properties of Hydrophilic Carboxymethyl Starch-Based Films

被引：0
|
作者：
Katarzyna Wilpiszewska
Adrian Krzysztof Antosik
Magdalena Zdanowicz
机构：
[1] West Pomeranian University of Technology,Faculty of Chemical Technology and Engineering, Polymer Institute
[2] West Pomeranian University of Technology,Faculty of Chemical Technology and Engineering, Institute of Organic Chemical Technology
来源：
Journal of Polymers and the Environment | 2019年 / 27卷
关键词：
Carboxymethyl starch; Citric acid; Polysaccharide film;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The carboxymethyl starch-based films in a presence of citric acid were prepared by casting technique. The influence of citric acid content on physicochemical properties of obtained hydrophilic films were evaluated (solubility in water, moisture absorption, mechanical and thermal properties). The crosslinking of starch derivative chains has been confirmed by FTIR spectroscopy, however, an excess of citric acid could cause hydrolysis of carboxymethyl starch chains. The best mechanical performance has been noted for the system containing 30 wt% (the highest tensile strength as well Young modulus 160 kPa and 650 kPa, respectively) as well as the highest Tg (ca. 58 °C). Additionally for the mentioned system the lowest solubility in water has been determined.
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页码：1379 / 1387
页数：8
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