Hierarchical structure and thermal behavior of hydrophobic starch-based films with different amylose contents

文献类型： 外文期刊

第一作者： Fu, Lingling

作者： Fu, Lingling;Li, Xiaoxi;Fu, Lingling;Zhu, Jie;Zhang, Shuyan;Li, Lin;Zhang, Binjia;Pu, Huayin;Wang, Qiang

作者机构：

关键词： Amylose;Starch-based;Hierarchical structure;Thermal behavior

期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：9.381； 五年影响因子：8.678 ）

ISSN： 0144-8617

年卷期： 2018 年 181 卷

页码：

收录情况： SCI

摘要： This work discloses the multi-level structure and thermal behaviors of hydrophobic, propionylated starch-based films as affected by the amylose contents of starch materials used. Scanning electron microscopy results showed that amylose promoted the formation of more compact structure within the film matrices. Also, small and wide angle X-ray scattering analysis revealed that higher amylose content was preferable for the formation of new orders on nanoscale and crystallites. With these structural changes, the viscoelasticity of amorphous short chains was enhanced and the glass transition temperature was reduced by the increased amylose content; but the depolymerization of macromolecules and the decomposition of molecular bonds were postponed, since the increase in starch crystallites restricted the motion of adjacent amorphous regions. Hence, this work provides valuable information for rational design of hydrophobic starch-based films with desired thermal features by simply regulating the amylose content of starch raw materials.

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