多官能单体交联丙烯酸长链烷基酯共聚物基MicroPCMs的囊壁调控与储能性能

项目名称： 多官能单体交联丙烯酸长链烷基酯共聚物基MicroPCMs的囊壁调控与储能性能

项目编号： No.51503084

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 丘晓琳

作者单位： 江南大学

项目金额： 20万元

中文摘要： 丙烯酸酯单体因其构筑聚合物的多样性及环保性，近年来在相变材料（PCMs）微胶囊化领域备受关注。本项目以丙烯酸长链烷基酯为单体合成聚合物囊壁，包封正烷烃类PCMs制备相变材料微胶囊（MicroPCMs），赋予囊壁柔韧性与易成膜性，提高其与正烷烃类PCMs的亲和性；引入多官能丙烯酸酯对囊壁进行交联以形成韧、硬、刚相均衡的囊壁材料，并通过囊壁调控实现高密度安全储能的集成化。从单体与交联剂组成与结构入手，阐明成囊过程中MicroPCMs精细微观内部相组成与结构的形成机理，明确囊壁聚合物交联网络结构与表面化学特征在PCMs包封中的作用，获得良好的包封结构以提高储能密度；揭示反复热交换-储能循环过程中MicroPCMs微观力学适应性能的演变规律，分析分子结构-力学性能-工作条件的相互关系，通过囊壁刚柔性调控优化储能可靠性，为开发新颖、安全、高效的高分子基复合相变材料提供新思路与理论依据。

中文关键词： 相变材料；微胶囊化；储能性能；丙烯酸长链烷基酯

英文摘要： Phase change materials (PCMs) are very attractive energy storage materials attributed to their characteristic of storing thermal energy nearly isothermally via phase transition and their abilities to provide high energy storage densities. Acrylate monomers are promising for microencapsulated phase change materials (MicroPCMs) since they can synthesis various environmental-friendly polymer with diversity properties as shell materials. In this research, n-alkanes would be microencapsulated by long-chain methacrylate polymer shells due to their better affinities to n-alkane and good film-forming abilities. Multifuctional crosslinkers would be introduced to afford better mechanical strength of the polymeric microcapsules. Since the polymer shells play an important role in controlling the properties of the MicroPCMs, the chemical composition and structure of the polymer shells would be modulated to improve the thermal storage abilities and thermal reliabilities of the MicroPCMs. The formation of the internal composition and structure of the MicroPCMs and the structure feature of crosslinking network would be investigated and optimized to obtain a great thermal storage ability of the MicroPCMs. Besides, the stiffness and flexibility of the polymer shell would be altered to improve the mechanical strength of the MicroPCMs, thus to acquire a better thermal reliability of the MicroPCMs. Furthermore, the evolvement rule of the mechanical strength of the MicroPCMs in the process of thermal cycling test would be explored.

英文关键词： Phase change materials;Microencapsulation;Thermal energy storage;Long-chain methacrylate