淀粉
吸水率
支链淀粉
直链淀粉
保水性
化学工程
化学
嫁接
丙烯酰胺
材料科学
变性淀粉
自愈水凝胶
高分子化学
肿胀 的
马铃薯淀粉
结晶度
差示扫描量热法
单体
聚合物
有机化学
复合材料
土壤水分
土壤科学
工程类
环境科学
作者
Huiyuan Luo,Fuping Dong,Qian Wang,Yihang Li,Yuzhu Xiong
出处
期刊:Molecules
[MDPI AG]
日期:2021-06-30
卷期号:26 (13): 3999-3999
被引量:4
标识
DOI:10.3390/molecules26133999
摘要
The performance of hydrogels prepared with traditional natural starch as raw materials is considerable; the fixed ratio of amylose/amylopectin significantly limits the improvement of hydrogel structure and performance. In this paper, starch hydrogels were prepared by physical blending and chemical grafting, with the aid of ultrasonic heating. The effects of different amylose/amylopectin ratios on the microstructure and water retention properties of starch hydrogels were studied. The results show that an increase in amylopectin content is beneficial to improve the grafting ratio of acrylamide (AM). The interaction between the AM grafted on amylopectin and amylose molecules through hydrogen bonding increases the pores of the gel network and thins the pore walls. When the amylopectin content was 70%, the water absorption (swelling 45.25 times) and water retention performance (16 days water retention rate 44.17%) were optimal. This study provides new insights into the preparation of starch-based hydrogels with excellent physical and chemical properties.
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