On the investigation of thermal/cooling-gel biphasic systems based on hydroxypropyl methylcellulose and hydroxypropyl starch
On the investigation of thermal/cooling-gel biphasic systems based on hydroxypropyl methylcellulose and hydroxypropyl starch
复制标题
基于羟丙基甲基纤维素和羟丙基淀粉的热/冷凝胶双相体系的研究
DOI：
10.1016/j.indcrop.2018.08.010
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发表时间：
2018-11
影响因子：
5.9
通讯作者：
Chen Ling
中科院分区：
文献类型：
--
作者：
Wang Yanfei;Yu Long;Xie Fengwei;Li Sheng;Sun Qingjie;Liu Hongsheng;Chen Ling
本文研究了由羟丙基甲基纤维素（HPMC）作为热凝胶和羟丙基淀粉（HPS）作为冷却凝胶的混合物形成的新型热/冷凝胶两相体系的流变学、结构和性能。由于凝胶化性质的不同，在低温下HPS成为另一连续相中的分散相，而在高温下HPMC也是如此。然而，分散相可以发挥主导作用的粘度，触变性，和共混物的凝胶性能，并随后影响的结晶结构，分形结构，力学性能，氧渗透性，和共混物膜的热稳定性。此外，通过对淀粉进行化学改性，还可以改变其流变性能、膜的结构和性能。羟丙基化可以破坏淀粉分子间氢键，破坏其有序结构，抑制分子重排，从而导致更柔软的凝胶质地，与HPMC更相容。羟丙基取代度越高，所得共混物膜越无定形，越柔韧，但力学性能和透氧性降低。从这项工作中获得的知识可以为进一步开发具有所需性能和功能的各种热/冷却凝胶多相系统提供指导。
This work investigates the rheology, structure, and properties of novel thermal/cooling-gel biphasic systems formed by hybridization of hydroxypropyl methylcellulose (HPMC) as a thermal gel and hydroxypropyl starch (HPS) as a cooling gel. Due to the different gelation properties, HPS became the dispersed phase in the other continuous phase at low temperatures, and so did HPMC at high temperatures. However, the dispersed phase could play a dominant role in the viscosity, thixotropy, and gel properties of the blends, and subsequently affect the crystalline structure, fractal structure, mechanical properties, oxygen permeability, and thermal stability of the blend films. Moreover, the rheological properties and the film structure and performance could also be varied by the chemical modification of starch. Hydroxypropylation could break the starch intermolecular hydrogen bonding, disrupt its ordered structure, inhibit the molecular rearrangement, and result in a softer gel texture that was more compatible with HPMC. With a higher degree of hydroxypropyl substitution, the resultant blend films were more amorphous and flexible but exhibited decreased mechanical properties and oxygen permeability. The knowledge obtained from this work could provide guidance to further developing various thermal/cooling-gel multi-phasic systems with desired properties and functionality.
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影响因子：
10.7
作者：
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通讯作者：
Sothornvit, Rungsinee
影响因子：
6
作者：
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通讯作者：
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影响因子：
3.8
作者：
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通讯作者：
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影响因子：
11.2
作者：
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通讯作者：
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DOI：
10.1016/j.ijbiomac.2017.07.109
发表时间：
2017-12
影响因子：
8.2
作者：
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通讯作者：
Abeera Moin;T. M. Ali;A. Hasnain