Silicone Rubber Composites with High Breakdown Strength and Low Dielectric Loss Based on Polydopamine Coated Mica
1
School of Electric Power, South China University of Technology, Guangzhou 510640, China
2
Electric Power Research Insititute, China Southern Power Grid Co., Ltd., Guangzhou 510080, China
3
Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing 100048, China
4
School of Renewable Energy, North China Electric Power University, Beijing 102206, China
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(12), 2030; https://doi.org/10.3390/polym11122030
Received: 14 November 2019 / Revised: 23 November 2019 / Accepted: 27 November 2019 / Published: 7 December 2019
(This article belongs to the Special Issue Advances in Rubber Composites)
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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Keywords:
silicone rubber; mica; polydopamine; vinyl tri-methoxysilane; dielectric loss; breakdown strength
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MDPI and ACS Style
Liao, Y.; Weng, Y.; Wang, J.; Zhou, H.; Lin, J.; He, S. Silicone Rubber Composites with High Breakdown Strength and Low Dielectric Loss Based on Polydopamine Coated Mica. Polymers 2019, 11, 2030. https://doi.org/10.3390/polym11122030
AMA Style
Liao Y, Weng Y, Wang J, Zhou H, Lin J, He S. Silicone Rubber Composites with High Breakdown Strength and Low Dielectric Loss Based on Polydopamine Coated Mica. Polymers. 2019; 11(12):2030. https://doi.org/10.3390/polym11122030
Chicago/Turabian StyleLiao, Yifan; Weng, Yunxuan; Wang, Jiaqi; Zhou, Hongfu; Lin, Jun; He, Shaojian. 2019. "Silicone Rubber Composites with High Breakdown Strength and Low Dielectric Loss Based on Polydopamine Coated Mica" Polymers 11, no. 12: 2030. https://doi.org/10.3390/polym11122030
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