文献类型：期刊文献

英文题名：A core@double shell-structured PBO composite with excellent dielectric properties and high heat resistance

作者：Liu, Qiang[1];Cheng, Zhipeng[1];Qian, Jun[1];Chen, Xuexue[1];Zhang, Yitong[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Polymer Mat Shanghai, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：7

期号：18

起止页码：11195

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20192006916532);WOS:【SCI-EXPANDED(收录号:WOS:000472225200035)】；

基金：This work was financially supported by the National Natural Science Foundation of China (51573045, 51773060) and the International Collaboration Research Program of Science and Technology Commission of Shanghai (16520722000).

语种：英文

外文关键词：Tensile strength - Dielectric losses - Electric fields - Dielectric properties of solids - Heat resistance - Shells (structures) - Magnetite

摘要：Herein, a new high dielectric performance composite was prepared, which contained a core@double shell structure filler. The fillers consisted of an Fe3O4 core, a carbon (C) inner shell and a PANI outer shell. This core@double shell structure contributed to the homogeneous dispersion of fillers. Under the influence of an external electric field, a huge number of dipoles appeared in the region near the interfaces, which deeply influenced the dielectric behavior of the composite. At 1 kHz and room temperature, the Fe3O4@C@PANI/PBO composite retained a high dielectric constant (164), an ultralow dielectric loss (0.047) and a high breakdown strength (195.2 +/- 9.5 kV mm(-1)). In addition, we inserted a PANI shell between the inorganic C shell and the organic matrix; this increased the compatibility of the fillers and endowed the nanocomposite with a high tensile strength (at 103 MPa) and tensile modulus (at 7.1 GPa). To achieve high thermal stability (at 670 degrees C), we synthesized poly-p-phenylene benzobisoxazole (PBO) and used it as a matrix. This new structure composite retained excellent comprehensive performance and could be used as an electronic component in a high temperature, corrosive, and huge mechanical strength working environment.