High Thermally Conductive Graphite Nanoplatelet/Polyetherimide Composite by Precoating: Effect of Percolation and Particle Size
High Thermally Conductive Graphite Nanoplatelet/Polyetherimide Composite by Precoating: Effect of Percolation and Particle Size
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DOI：
10.1002/pc.22624
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发表时间：
2013-12-01
影响因子：
5.2
通讯作者：
Drzal, Lawrence T.
中科院分区：
文献类型：
--
作者：
Wu, Huang;Drzal, Lawrence T.
采用熔融共混和预涂的方法将不同尺寸的石墨纳米片（GNP）与聚醚酰亚胺（PEId）复合，研究了GNP对复合材料导电性和导热性的影响。预涂配混成功地产生了具有1重量%的电渗流阈值的增稠的GNP网络，而熔融共混的样品需要超过5重量%的浓度来实现渗流。预涂样品也显示出比熔融共混样品更高的热导率。较小的GNP粒度导致较低的热导率。与纯聚合物相比，预涂覆的10重量% GNP-15/PEId复合材料记录到热导率的1，600%的改善，并且发现对GNP浓度的多项式依赖性可预测热导率。Polym.比较器：34：2148-2153，2013. (c)2013年塑料工程师学会
Graphite nanoplatelets (GNPs) with different sizes were compounded with polyetherimide (PEId) by melt-blending and precoating in order to investigate their effect on the electrical and thermal conductivity of the composites. Precoating compounding successfully created a percolated GNP network with an electrical percolation threshold at 1 wt%, while melt-blended samples required concentrations over 5 wt% to achieve percolation. The precoated samples also show higher thermal conductivity than the melt-blended ones. Smaller GNP particle size results in lower thermal conductivity. An improvement of 1,600% in thermal conductivity was recorded for precoated 10 wt% GNP-15/PEId composite as compared to the neat polymer and a polynomial dependence on GNP concentration was found to predict thermal conductivity. POLYM. COMPOS., 34:2148-2153, 2013. (c) 2013 Society of Plastics Engineers