光及pH双重响应的多形状记忆材料研究

多重形状记忆高分子材料是当今的智能材料科学领域的研究热点方向之一。针对目前多重形状记忆高分子材料响应方式较为单一（多为热刺激）、形变记忆性能有待加强的问题，本项目拟利用环糊精与偶氮苯的可逆包合和丹磺酰氯的pH响应聚集行为作为分子开关，构筑一种可分别响应光和pH刺激、记忆不同的形状的多重形状记忆高分子材料。研究工作中将深入研究材料的形状记忆工作机理、优化制备方法，探讨制备方法、材料结构组成与各项性能（特别是形状记忆性能）之间的关系，并建立分子水平模型。这种光和pH双重响应的形状记忆材料在响应方式上实现了创新，可在常温下完成三种形状之间的转换，可望为形状记忆材料的新原理和新应用研究开辟出一条新的途径。

The important branch and hot field of the smart materials is the research about multiple shape memory polymer. This project designs a photo- and pH-responsive multiple shape memory polymer using the reversible host-guest inclusion between cyclodextrin and azobenzene and the pH-responsive aggregation of dansyl group as molecular switch. The obtained material could remember different shape in respond to photo and pH respectively. The relationship between the structure and the property of the material, the shape memory mechanism would be investigated, and a molecular-level pattern would be established. The gentle, effective and diverse stimulus-responsive material will open new avenues for new principles and applications of the multiple shape memory polymers.