Using boron nitride (BN) and aluminum nitride (AlN) as thermally conductive fillers,BN and AlN are dispersed in polyamide 6(PA6) by solution ultrasonic stripping,and then melt blended with polyvinylidene fluoride (PVDF),PVDF/(PA6/BN/AlN) thermal conductive composites with double percolation structure was prepared.The effect of BN/AlN loading on the thermal conductivity and dielectric properties of PVDF/PA6 composite were investigated.The results showed that BN/AlN selectively distributed in the PA6 phase.With the increase of BN/AlN loading,the thermal conductivity of the composite increases,which are beneficial to improve the heat absorption and heat dissipation ability of the composite.When the BN/AlN loading is 5wt%,the thermal conductivity of the composite is 0.564W/(m·K),and the thermal conductivity is increased by 164.8% compared with the pure PVDF/PA6 composite.The addition of BN/AlN is also beneficial to improve the dielectric properties of PVDF/PA6 composite.When BN/AlN is 5wt% and the frequency is 100Hz,the dielectric constant value is 11923,which was 917 times that of pure PA6/PVDF composite.
Zhang Zhen, Zhao Jun, Cao Ming, Chen Peng, Qian Jiasheng, Wu Bin, Xia Ru
. Preparation and property of PVDF/(PA6/BN/AlN) thermal conductive composite with double percolation structure[J]. New Chemical Materials, 2020
, 48(7)
: 60
-63
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.07.014
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