1. Construction of Porous Starch-Based Hydrogel via Regulating the Ratio of Amylopectin/Amylose for Enhanced Water-Retention
- Author
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Qian Wang, Yihang Li, Luo Huiyuan, Fuping Dong, and Yuzhu Xiong
- Subjects
Absorption of water ,Starch ,Pharmaceutical Science ,Organic chemistry ,02 engineering and technology ,010402 general chemistry ,ultrasonic chemistry ,01 natural sciences ,Article ,Analytical Chemistry ,water-retaining ,chemistry.chemical_compound ,QD241-441 ,Amylose ,Drug Discovery ,medicine ,Physical and Theoretical Chemistry ,porous structure ,starch ,food and beverages ,021001 nanoscience & nanotechnology ,Grafting ,0104 chemical sciences ,carbohydrates (lipids) ,chemistry ,Chemical engineering ,Chemistry (miscellaneous) ,Amylopectin ,Acrylamide ,Self-healing hydrogels ,Molecular Medicine ,Swelling ,medicine.symptom ,hydrogel ,0210 nano-technology - Abstract
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.
- Published
- 2021
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