自愈水凝胶
淀粉
流变学
聚合物
化学工程
材料科学
分子动力学
生物相容性
限制
纳米技术
化学
高分子化学
复合材料
有机化学
计算化学
工程类
机械工程
作者
Todor Koev,Juan C. Muñoz–García,Dinu Iuga,Yaroslav Z. Khimyak,Frederick J. Warren
标识
DOI:10.1016/j.carbpol.2020.116834
摘要
Hydrogels have a complex, heterogeneous structure and organisation, making them promising candidates for advanced structural and cosmetics applications. Starch is an attractive material for producing hydrogels due to its low cost and biocompatibility, but the structural dynamics of polymer chains within starch hydrogels are not well understood, limiting their development and utilisation. We employed a range of NMR methodologies (CPSP/MAS, HR-MAS, HPDEC and WPT-CP) to probe the molecular mobility and water dynamics within starch hydrogels featuring a wide range of physical properties. The insights from these methods were related to bulk rheological, thermal (DSC) and crystalline (PXRD) properties. We have reported for the first time the presence of highly dynamic starch chains, behaving as solvated moieties existing in the liquid component of hydrogel systems. We have correlated the chains' degree of structural mobility with macroscopic properties of the bulk systems, providing new insights into the structure-function relationships governing hydrogel assemblies.
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