Zhu Bo, Sun Hao, Zhu Yaqi, He Shengkun, Han Ximu
MOE Key Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology, Harbin 150080, China.
Polymers (Basel). 2024 Jan 4;16(1):155. doi: 10.3390/polym16010155.
To investigate the effect of the structure of microcapsules on the properties of cross-linked polyethylene (XLPE) composites, three XLPE specimens filled with multilayered shell-core-structured microcapsules are designed. In this paper, the microcapsules are first analyzed morphologically and chemically. In addition, the effect of the microcapsule structure on the typical electrical properties of the composites is explored. Finally, the self-healing ability of XLPE specimens filled with microcapsules is verified. The results show that the SiO on the surface of the trilayer shell-core microcapsules can make the microcapsules and the XLPE matrix have a better mechanical interlocking ability, which makes the typical properties of the trilayer shell-core microcapsules slightly better than those of the bilayer shell-core microcapsules. Moreover, when the bilayer shell-core or trilayer shell-core microcapsules rupture under the action of an electric field, the repair material reacts with the water tree under capillary action to consume the residual water while generating organic matter to fill in the cavity, thus repairing the damaged area of the water tree and ultimately achieving the self-healing of the composite water tree.
为了研究微胶囊结构对交联聚乙烯（XLPE）复合材料性能的影响，设计了三种填充有多层核壳结构微胶囊的XLPE试样。本文首先对微胶囊进行了形态和化学分析。此外，还探讨了微胶囊结构对复合材料典型电学性能的影响。最后，验证了填充微胶囊的XLPE试样的自修复能力。结果表明，三层核壳微胶囊表面的SiO能使微胶囊与XLPE基体具有更好的机械互锁能力，这使得三层核壳微胶囊的典型性能略优于双层核壳微胶囊。此外，当双层核壳或三层核壳微胶囊在电场作用下破裂时，修复材料在毛细作用下与水树反应，消耗残留水分，同时生成有机物填充空洞，从而修复水树的受损区域，最终实现复合水树的自修复。
