Effect of coupling agents on the electrical performance of BN/ meta-aramid composite paper

Abstract

Coupling agents can be key for the electrical performance of BN/ meta-aramid paper. In this article, triethoxy-silane coupling agents with different organophilic groups, including mercapto-propyl (MP), glycidylether-propyl (GP), amino-propyl (AP) and trideca-fluoro-octyl (TFO) were studied. The structural and electrical properties of modified papers were compared, and the molecular simulation was conducted to reveal the interface interaction of modified BN and aramid. The results show that AP and TFO have a better enhancing effect of insulation performance of composite paper than GP and MP. By choosing TFO and 15 wt% filler content, the optimal breakdown strength of paper was obtained as 28.17 kV /mm, 1.8 times that of the hydroxylated BN/ aramid paper.