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Highly thermally conductive PVDF-based ternary dielectric composites via engineering hybrid filler networks

机译：基于高度导热的PVDF基三元电介质复合材料，通过工程杂交填充网络

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摘要

Thermally conductive ternary poly (vinylidene fluoride) (PVDF)-based dielectric materials were fabricated via engineering the filler networks using hexagonal boron nitride (hBN) nanosheets and surface functionalized silicon carbide (f-SiC) nanowires. The hBN nanosheets and f-SiC nanowires synergistically improved the thermal conductivity of the composites, in a way that parallelly oriented f-SiC nanowires bridged by the hBN nanosheet networks. The ternary composites with 20 wt% hBN nanosheets and 26 wt% f-SiC nanowires exhibited a high thermal conductivity of 1.41 W/mK, about 5.9 times of that of neat PVDF. In addition, the ternary composites showed superior dielectric permittivity, while maintaining a low loss at 1 kHz. The presence of f-SiC nanowires contributed to the interfacial polarization between the fillers and PVDF matrix, resulting in the increased dielectric permittivity. Meanwhile, low dielectric loss could be maintained due to the isolation of f-SiC nanowires by insulating hBN nanosheets and PVDF matrix.
机译：通过使用六边形氮化硼（HBN）纳米晶片和表面官能化碳化硅（F-SiC）纳米线通过工程填充网络制造导热三元聚（偏二氟乙烯）基介电材料。 HBN纳米片和F-SiC纳米线协同提高复合材料的导热率，以平行定向由HBN纳米液网络桥接的F-SiC纳米线。具有20wt％HBN纳米片和26wt％F-SiC纳米线的三元组合材料表现出1.41W / mK的高导热率，齐全PVDF的约5.9倍。另外，三元复合材料显示出优异的介电常数，同时保持1kHz的低损耗。 F-SiC纳米线的存在有助于填料和PVDF基质之间的界面偏振，导致介电常数增加。同时，由于通过绝缘HBN纳米晶片和PVDF基质分离F-SiC纳米线，可以保持低介电损耗。

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  • 来源
    《Composites》 |2020年第15期|107978.1-107978.8|共8页
  • 作者

    Wang Bin; Yin Xiaohong; Peng Dan; Zhang Yu; Wu Wei; Gu Xiaobin; Na Bing; Lv Ruihua; Liu Hesheng;

  • 作者单位

    East China Univ Technol Sch Chem Biol & Mat Sci Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev Nanchang 330013 Jiangxi Peoples R China;

    Shenzhen Technol Univ Coll Urban Transportat & Logist Shenzhen 518118 Peoples R China;

    East China Univ Technol Sch Chem Biol & Mat Sci Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev Nanchang 330013 Jiangxi Peoples R China;

    East China Univ Technol Sch Chem Biol & Mat Sci Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev Nanchang 330013 Jiangxi Peoples R China;

    South China Univ Technol Natl Engn Res Ctr Novel Equipment Polymer Proc Key Lab Polymer Proc Engn Minist Educ Guangdong Prov Key Lab Tech & Equipme Guangzhou 510640 Peoples R China;

    East China Univ Technol Sch Chem Biol & Mat Sci Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev Nanchang 330013 Jiangxi Peoples R China;

    East China Univ Technol Sch Chem Biol & Mat Sci Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev Nanchang 330013 Jiangxi Peoples R China;

    East China Univ Technol Sch Chem Biol & Mat Sci Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev Nanchang 330013 Jiangxi Peoples R China;

    East China Univ Technol Sch Chem Biol & Mat Sci Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev Nanchang 330013 Jiangxi Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Polymer-matrix composites; Thermal conductivity; Dielectric property;

    机译：聚合物 - 基质复合材料;导热率;介电性能;

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