材料科学
环氧树脂
复合材料
消散
兴奋剂
电介质
介电强度
纳米复合材料
表面电荷
光电子学
热力学
物理
物理化学
化学
作者
Huasong Xu,Congzhen Xie,Bin Gou,Rong Wang,Yancheng Li,Yan Du,Jiangang Zhou,Licheng Li
标识
DOI:10.1016/j.mssp.2021.106430
摘要
Polymeric materials doped with wide-bandgap semiconductors exhibit intriguing nonlinear conductivity and rapid charge dissipation characteristics. However, excessive doping to accelerate charge dissipation occurs at the expense of breakdown strength. In this work, a sandwich topological structure is proposed to realize synergetic optimization of charge transport and breakdown strength. SiC nanoparticles decorated with insulation shell SiO 2 were prepared, which served as fillers in the two surface layers of sandwich structured epoxy composites with exfoliated and functionalized m-BNNS doped into epoxy as the insert layer. The significantly improved breakdown strength approaches 65.8 kV/mm (44% higher than pristine epoxy resin) for sandwich structured composites due to local electric field redistribution while maintaining excellent charge dissipation ability owing to surface charge dissipation and charge decay along the bulk. Moreover, the dielectric loss still retains a low value of 0.02. These novel sandwich structured composites present promising potential in electrical and electronic insulation systems. Excellent charge dissipation performance and high breakdown strength were realized through sandwich topological structure.
科研通智能强力驱动
Strongly Powered by AbleSci AI