明胶基水敏感形状记忆共混材料的研究

发布时间：2018-07-02 13:44

本文选题：形状记忆聚合物 + 水敏感　；参考：《石油化工》2017年06期

【摘要】：基于亲水性天然高分子明胶为记忆开关、聚氨酯弹性体为网络节点,通过共混技术,制得水敏感型形状记忆材料,开发了一种具有水响应形状记忆功能、制备简单易得的智能材料。采用SEM和DMA表征材料的形貌和热性质。表征结果显示,明胶与聚氨酯具有良好相容性,有利于共混体系的稳定,同时明胶的玻璃化转变温度在水分子作用下可降至室温,是其作为水响应记忆开关的关键因素。实验结果表明,通过记忆程序设计研究发现该材料的形状回复时间和回复率可在一定范围内进行调节,且形状固定率都超过70%;经动态机械行为研究发现明胶的加入可显著提高弹性体基材的储能模量(E′),而记忆驱动力正来源于材料的E′在水作用前后的急剧变化。
[Abstract]:Based on hydrophilic natural macromolecule gelatin as memory switch and polyurethane elastomer as network node, a water-sensitive shape memory material was prepared by blending technology, and a water-responsive shape memory material was developed. A simple and readily available smart material is prepared. SEM and DMA were used to characterize the morphology and thermal properties of the materials. The results show that the gelatin has good compatibility with polyurethane, which is beneficial to the stability of the blend system, and the glass transition temperature of gelatin can be reduced to room temperature under the action of water molecule, which is the key factor for the water response memory switch. The experimental results show that the shape recovery time and the recovery rate of the material can be adjusted in a certain range by memory programming. The dynamic mechanical behavior study shows that the addition of gelatin can significantly increase the energy storage modulus (E') of the elastomer substrate, while the memory driving force is due to the sharp change of the E'of the material before and after the water action.
【作者单位】：中山大学材料科学与工程学院;香港理工大学应用科学与纺织系;
【基金】：国家自然科学基金项目(51373147)
【分类号】：TB381

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