Issue 59, 2017

Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

Abstract

In order to improve the compatibility between barium titanate (BT) particles and a brominated butyl rubber (BIIR) matrix, a silane coupling agent γ-methacryloxy propyl trimethoxysilane (KH570) was used to modify the BT particles. Subsequently, BT and the BT-KH570 particles were added into the BIIR matrix to form BT/BIIR and BT-KH570/BIIR dielectric composites. The BT-KH570/BIIR composite has a higher dielectric constant, better mechanical properties, and larger actuated strain compared with the BT/BIIR composite with the same filler content. The 10 phr BT-KH570/BIIR composite achieved the largest actuated strain. To further increase the actuated strain of the BT-KH570/BIIR composite, the polar plasticizer tri-n-butyl phosphate (TBP) was added into the composite. Due to the polar groups of TBP, the dielectric constant of the TBP/BT-KH570/BIIR composite was improved and the elastic modulus decreased at the same time. As a result, we obtained a gain in actuated strain of 4.46% at an electric field of 22.5 kV mm−1, which corresponds to an increase of about 500% in comparison with that of pure BIIR. This represents a significant improvement in actuated strain performance.

Graphical abstract: Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
19 May 2017
Accepted
14 Jul 2017
First published
26 Jul 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 37148-37157

Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

M. Ruan, D. Yang, W. Guo, S. Huang, Y. Wu, H. Wang, H. Wang and L. Zhang, RSC Adv., 2017, 7, 37148 DOI: 10.1039/C7RA05667B

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