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

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Abstract

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 °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.

Graphical abstract: A core@double shell-structured PBO composite with excellent dielectric properties and high heat resistance

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Publication details

The article was received on 07 Dec 2018, accepted on 02 Apr 2019 and first published on 16 Apr 2019


Article type: Paper
DOI: 10.1039/C8TA11796A
Citation: J. Mater. Chem. A, 2019, Advance Article

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

    Q. Liu, Z. Cheng, J. Qian, X. Chen, Y. Zhang and Q. Zhuang, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA11796A

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