Preparation and performance improvement of a dual-component microcapsule self-healing system for silicone rubber insulating material  

作　　者：Mingzhe Li Bin Cao Fanghui Yin Hongwei Mei Liming Wang 

机构地区：[1]Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen,China

出　　处：《High Voltage》2024年第2期453-465,共13页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:51977118。

摘　　要：A key factor limiting the development of silicone rubber insulating materials is their short service life in harsh operating environments.The establishment of a self-healing system is desired to improve the long-term operational performance of silicone rubber and effectively extend its service life.In this study,poly(urea-formaldehyde)microcapsules containing polydimethylsiloxane healing agents are prepared and a dual-component microcapsule self-healing system for silicone rubber material is established and opti-mised.In addition,the key factors affecting the self-healing performance(such as microcapsule size,rupture rate,and microcapsule doping amount)are investigated.It is found that when SYLGARDTM 184 is used as the healing agent and matrix,with a 4:6(A:B)doping ratio of dual-component microcapsules and 20 phr doping amount,the self-healing efficiency is approximately 51%.Furthermore,increasing the microcapsule rupture rate and the interface strength between the healing agent and the matrix can effectively improve the self-healing performance.The relationships between key factors and self-healing performance are theoretically revealed.Based on the relationships,the microcapsule self-healing system can be appropriately designed.The results of this paper can provide a reference for the development of long-life silicone rubber insulating materials.

关 键 词：SERVICE RUBBER performance 

分 类 号：TM216[一般工业技术—材料科学与工程]