Enhancement of the heat conduction performance of boron nitride/cellulosic fibre insulating composites

PloS One
Zhihuai YuHongqi Dai

Abstract

The continuous development of high electrical equipment towards high power output requires better heat dissipation performance of internal insulation structure. It challenges the traditional paper-based insulating materials, with poor thermal conductivity. Introducing thermally conductive and electrically insulating filler into cellulose-based insulating material can enhance heat conduction performance. This work provided a method to prepare thermally conductive and electrically insulating BN/cellulosic fibre composites. And the thermal conductivity of the composites was remarkably increased via grafting APTES and adding dual-sized fillers. The thermal conductivity of the composite reached 0.682 W/(m•k) that increased by 387% with h-BN loading of 41.08 wt%. Simultaneously, BN fillers improved the insulating properties of the resultant composites. The dielectric constant, breaking strength of and volume resistivity of the composites reached 4.75, 9.2 kV/mm-1 and 4.72×10(14) Ω•m, respectively. The resultant insulating material which has better heat conduction property may have a vast potential for future development in electrical equipment.

References

May 26, 2006·The Journal of Physical Chemistry. B·Chengchun TangDmitri Golberg
Oct 6, 2016·ACS Applied Materials & Interfaces·Lihui ZhouLiangbing Hu

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Citations

Oct 10, 2021·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Mohammed J MezianiYa-Ping Sun

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