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Open AccessArticle

Effect of Particle Sizes of Nickel Powder on Thermal Conductivity of Epoxy Resin-Based Composites under Magnetic Alignment

School of Optics and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
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Polymers 2019, 11(12), 1990; https://doi.org/10.3390/polym11121990
Received: 12 November 2019 / Revised: 28 November 2019 / Accepted: 28 November 2019 / Published: 2 December 2019
(This article belongs to the Special Issue Photo-Enhanced Functional Polymer Composites)
Magnetically oriented three-phase composite systems of epoxy resin, aluminum nitride, and nickel have been prepared, the thermal conductivity of composites filled with nickel powder with different particle sizes and content under different applied magnetic fields was studied. The vibrating scanning magnetometer (VSM) and scanning electron microscopy (SEM) were applied to investigate the dispersion of nickel powder in the composites. The results showed that the anisotropic thermal conductivity of the composites treated by applied magnetic field forming chain structure is obtained. The epoxy resin-based composites filled with 30 vol% aluminum nitride with particle size of 1 μm and 2 vol% nickel powder with particle size of 1 μm and aligned with vertical magnetic field have the highest thermal conductivity (1.474 W/mk), which increases the thermal conductivity of the composites by 737% and 58% compared to the pure epoxy resin (0.2 W/mk) and the composites filled with 30 vol% aluminum nitride (0.933 W/mk). In addition, we simulated the influence of nickel powder particles with different particle sizes and arrangements on the thermal conductivity of the composite material in COMSOL Multiphysics software, and the results were consistent with the experimental results.
Keywords: polymer-matrix composites (PMCs); anisotropy; thermal properties; analytical modelling polymer-matrix composites (PMCs); anisotropy; thermal properties; analytical modelling
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MDPI and ACS Style

Jin, Z.; Liang, F.; Lu, W.; Dai, J.; Meng, S.; Lin, Z. Effect of Particle Sizes of Nickel Powder on Thermal Conductivity of Epoxy Resin-Based Composites under Magnetic Alignment. Polymers 2019, 11, 1990.

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