胶囊外植型自修复高分子复合材料的设计与实现.docVIP

 胶囊外植型自修复高分子复合材料的设计 与实现# 5 10 15 20 25 30  摘要：自修复高分子材料利用仿生智能材料的设计思想，赋予材料自诊断、自愈合的能力， 以达到消除材料中的微裂纹、延长其使用寿命的目的。针对聚合物的外植式自修复技术中存 在的诸多问题，本课题组设计、合成了一系列双胶囊、单胶囊型自修复高分子材料及其复合 材料，深入研究了相关的修复剂体系设计、微胶囊的制备工艺、配方优化、材料结构与性能、 自修复的微观机制及其影响因素、使用稳定性等，达到了提高自修复速度、改善胶囊存储的 稳定性、以及减小胶囊对聚合物本身力学性能的影响等目标，并将此方法扩展至热塑性活性 聚合物的修复，促进了此类自修复技术的发展。 关键词：自修复；胶囊型；环氧树脂基体；热塑性活性聚合物基体 中图分类号：O631.1+1 Designed and realization of extrinsic self-healing polymer composites by embedded microcapsules RONG Minzhi, ZHANG Mingqiu (Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, GuangZhou 510275) Abstract: Self-healing polymers utilize bio-inspired ideas to impart polymer with self-diagnosing and self-repairing capability, so that micro-cracks in the material can be eliminated and service lifetime of polymers is prolonged. In order to solve the problems existing in the extrinsic self-healing techniques, several extrinsic self-healing polymer composites containing double or single embedded microcapsules were developed and characterized. Accordingly, topics including design of healing agents, synthesis techniques of microcapsules, formulation optimization, structure and properties relationship, healing mechanisms and influencing factors, stability and durability were carefully investigated. Through these works, some objects were attained, like acceleration of self-healing speed, improve stableness of microcapsules, reduction of influence of capsule addition on the mechanical properties, etc. Besides, self-healing of thermoplastic polymer based on single microcapsules and reactive polymer matrix was also developed. All these have promoted the development of extrinsic self-healing routes. Keywords: Self-healing; microcapsule; epoxy resin matrix; reactive thermoplastic polymer matrix 35 0 引言 高分子复合材料在其成型加工和使用过程中不可避免地会产生局部损伤和微裂纹, 进 而引发宏观裂缝而发生破坏, 影响相关产品的正常使用和缩短使用寿命，而往往这些微损伤 在开始的时候难以发现，或者即使被发现也因产品形状等限制无法得到及时修复。因此，