Silicone Rubber Composites with High Breakdown Strength and Low Dielectric Loss Based on Polydopamine Coated Mica

被引：38
|
作者：
Liao, Yifan [1 ,2 ]
Weng, Yunxuan [3 ]
Wang, Jiaqi [4 ]
Zhou, Hongfu [3 ]
Lin, Jun [4 ]
He, Shaojian [4 ]
机构：
[1] South China Univ Technol, Sch Elect Power, Guangzhou 510640, Peoples R China
[2] China Southern Power Grid Co Ltd, Elect Power Res Insititute, Guangzhou 510080, Peoples R China
[3] Beijing Key Lab Qual Evaluat Technol Hyg & Safety, Beijing 100048, Peoples R China
[4] North China Elect Power Univ, Sch Renewable Energy, Beijing 102206, Peoples R China
来源：
POLYMERS | 2019年 / 11卷 / 12期
基金：
中国国家自然科学基金;
关键词：
silicone rubber; mica; polydopamine; vinyl tri-methoxysilane; dielectric loss; breakdown strength; OUTDOOR INSULATION; MEMBRANES; FILLERS; POLY(DOPAMINE); NANOCOMPOSITES; CONDUCTIVITY; IMPROVEMENT;
D O I：
10.3390/polym11122030
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
High breakdown strength and low dielectric loss are necessary for the outdoor insulator using silicone rubber (SR) composites. In this work, polydopamine coated mica (mica-PDA) was synthesized via bioinspired dopamine self-polymerization, and mica-PDA-filled SR composite (SR/mica-PDA-VTMS) was prepared using vinyl tri-methoxysilane (VTMS) as a silane coupling agent which serves as the molecular bridges between the organic rubber and the inorganic filler. The SR/mica-PDA-VTMS composite demonstrated dense and uniform morphology where the filler was well dispersed. Due to the strong interfacial interactions between filler and rubber, the SR/mica-PDA-VTMS composite exhibits much lower dielectric loss compared to the other mica-filled SR composites, which was comparable to the prepared alumina-tri-hydrate-filled SR composites. Moreover, the breakdown strength of 31.7 kV/mm and tensile strength of 5.4 MPa were achieved for the SR/mica-PDA-VTMS composite, much higher than those of the other as-prepared SR composites.
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页数：9
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