以多重氢键复合构筑自愈合型液晶弹性体

液晶弹性体兼具有液晶的有序性、流动性和弹性体的高弹性，在功能材料和高级复合材料等领域具有广阔的应用前景。然而，该类材料在成型、加工和使用中均易产生局部微损伤，使得其力学性能和寿命将受到较大影响。在本项目中，我们将自愈合的功能引入该类液晶弹性体，期望能弥补该类材料在使用过程中的不足。本体系中，通过合理的分子设计将多重氢键的概念引入液晶弹性体中，设计并将制备侧链型、刚性主链型、嵌段型等多种不同拓扑结构的自愈合型液晶弹性体，研究其化学结构、拓扑结构和凝聚态结构的变化与液晶弹性体相关性能和愈合性能的之间的关系，考察外场作用对其弹性性能和自愈合性能及其他相关功能性质的影响。通过对该类液晶弹性体的分子设计、合成、结构与性能的系统全面的研究，从而对该类自愈合型液晶弹性做出更为深刻和全面的理解，为其进一步的功能材料的制备提供理论和实验依据，最终制备出具有应用前景的自愈合型液晶弹性体。

Due to the combined properties of ordering, fluidity and elasticity, liquid crystalline elastomers (LCEs) have a wide range of applications in functional and complex materials. However, the kind of materials are susceptible to damage and injure in the form of cracks in the process of the use, and this damage gives rise to their decrease of the mechanical property and lifetime. In this project, we try to import the self-healing feature into the LCEs inspired by nature, and expect this LCEs have the ability to spontaneously heal the injury and damage, which will improve the property and increase the lifetime in the using process. In order to realize the idea, a serial of novel LCEs will be reasonably designed through the introduction of the multiple hydrogen bonding. We will intend to design and prepare three kind of self-healing LCEs with different topological structures, namely, side-chain LCEs, rigid main-chain LCEs and block copolymer LCEs. Then, we are going to focus on the relationship of their chemical structures, topological structures, aggregated structures and their relative properties including self-healing character. Furthermore, the effect of external field such as force field, electric field and magnetic field on their mechanical and liquid crystalline properties and self-healing character will be investigated. We think that we can obtain the comprehensive and thorough understand the properties of the self-healing LCEs via the systematic studying on the design, synthesis, structure and properties. Based on such works, we will provide not only technological guidance but also theoretical basis for the preparation of new functional materials. Moreover, we wish we will obtain a kind of perspective and practicability self-healing LCEs at last.