自愈水凝胶
山梨醇
肿胀 的
化学
化学工程
溶剂
高分子化学
卡拉胶
傅里叶变换红外光谱
材料科学
核化学
有机化学
复合材料
生物化学
工程类
作者
Yichuan Wang,X Zhang,Yanxiang Gao,Fang Yuan,Like Mao
标识
DOI:10.48130/fia-2023-0031
摘要
Strong κ-carrageenan (KC) hydrogels were fabricated via solvent replacement with sorbitol, and the effects of KC mass fraction and solvent replacement on the structural characteristics encapsulation capability of the hydrogels were evaluated. Microstructural observation showed that the 3D network structures of hydrogels exhibited a complete and continuous skeleton. FTIR spectra of KC hydrogels revealed the formation of intermolecular hydrogen bonds after sorbitol replacement. The stability against heating and freeze-thawing of hydrogels was enhanced due to the addition of sorbitol and the rise in KC mass fraction. The hydrogel with 1.5 wt% KC after sorbitol replacement presented the best stability. Frequency sweep tests suggested that storage modulus of the samples were influenced by sorbitol replacement and KC concentration. Swelling tests revealed that the hydrogels after replacement with a higher KC content (1.25, 1.50 wt%) presented higher swelling capacity, and they were more stable in alkaline and acidic solutions. When epigallocatechin gallate (EGCG) was incorporated within the hydrogels, the hydrogels after sorbitol replacement offered higher protection capability. The information obtained in this study indicated that sorbitol replacement strengthened KC hydrogels, and they could act more appropriately as accountable carriers for bioactives.
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