基于动态热可逆共价键的自修复型高分子及其复合材料

项目名称： 基于动态热可逆共价键的自修复型高分子及其复合材料

项目编号： No.51333008

项目类型： 重点项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 章明秋

作者单位： 中山大学

项目金额： 300万元

中文摘要： 为了在分子水平赋予结构用高分子及其复合材料反复多次微损伤自修复能力，本项目拟在代表性高分子材料中引入新型热可逆共价键自修复机制，分别利用C-ON和双硫键的动态热可逆反应，构筑两类本征型自修复材料。通过分子与网络结构的设计，合成分别含烷氧胺基团和双硫键的交联聚合物，制备自修复型环氧树脂及其纤维增强复合材料、自修复型硫化橡胶等，深入研究可逆动态共价键的热可逆特性与分子结构和材料宏观性能的关系，揭示材料合成、制备技术、分子链断裂—结合动态可逆行为、以及化学、物理性能等因素对自修复的影响，阐明材料中微裂纹的热可逆自修复过程，解决在固态可逆化学反应发生时，如何保障分子链具有足够运动能力以及材料修复过程仍保持承载能力的关键共性科学问题，为自修复型高分子材料的理论发展和实际应用提供依据。本项目研究思路和工作方案具有较扎实的理论依据和前期探索支撑，创新性明显，同时充分考虑了材料应用的需求，可行性较高。

中文关键词： 自修复;热可逆键;高分子及其复合材料;;

英文摘要： To provide structural polymers and polymer composites with multiple self-healability on molecular scale, the present project is going to introduce novel healing mechanisms based on thermally reversible covalent bonds into representative polymeric materials. Accordingly, two types of intrinsic self-healing materials will be developed taking advantage of dynamic reversibility of C-ON and disulfide bonds. On the basis of molecular design and network design, crosslinked polymers respectively containing alkoxyamine groups and disulfide linkages are synthesized, producing self-healing epoxy and its fiber reinforced composites, self-healing vulcanized rubber, etc. Substantial research efforts will be laid on the relationship among thermal reversibility of the dynamic reversible covalent bonds, molecular structure, and macroscopic properties of the materials. It is hoped that the influences of synthesis and preparation techniques, reversible breakage-recombination of macromolecules, chemical and physical properties on healing efficiency will be carefully revealed. This will help to clarify the mechanisms involved in thermal remendability of the materials. More importantly, the dilemma that how to ensure sufficient movability of the macromolecules and load-bearing capability during crack repairing of the materials might be solved. The outcomes of this project are believed to serve as solid basis for development of theories of self-healing polymers and their applications. In summary, the present proposal is reasonably worked out and supported by the pilot explorations. The innovative technical routes have considered the demands of practical usage. In this context, the proposal is coupled with high feasibility.

英文关键词： Self-healing;Thermally Reversible Bonds;Polymer and Polymer Composite