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Construction of Porous Starch-Based Hydrogel via Regulating the Ratio of Amylopectin/Amylose for Enhanced Water-Retention

Huiyuan LuoDepartment of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaFuping DongDepartment of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaQian WangDepartment of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaYihang LiDepartment of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaYuzhu XiongDepartment of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China

2021en

ABI

Annotatsiya

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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Identifikatorlar

DOI: 10.3390/molecules26133999

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