Thermal conductivity of epoxy resin composites filled with combustion‐synthesized AlN powder

Abstract

The thermal conductivity of epoxy resin composites filled with combustion‐synthesized aluminum nitride (AlN) particles was investigated. The mixing of the composite constituents was carried out by either a dry method (involving no use of solvent) for low filler contents or a solvent method (using acetone as solvent) for higher filler contents. It was found that surface treatment of the AlN particles using a silane, 3‐aminopropyltriethoxysilane (APTES), increases the thermal conductivity of the resultant composites by a less amount compared to most of the values reported in other studies. This was explained by that the combustion‐synthesized AlN particles contain less OH or active sites on the surface, thus adsorbing less amounts of APTES. However, the thermal conductivity of the composites filled with the combustion‐synthesized AlN was found to be within the range of the values reported in other studies where commercially available AlN was used. Effects of several factors on the thermal conductivity of the epoxy resin composites were investigated including filler content (10‐60 vol%), particle size (2.5‐22.4 μm), oxygen content (0.22‐2.20 wt%) and with or without surface treatment. Within the ranges of the factors investigated in this study, it was found that the filler content has the greatest effect on the thermal conductivity of the composites. The effects of the other three factors on the thermal conductivity of the composites increase roughly with increasing filler content. Among the three factors, the effect of particle size on the thermal conductivity was found to be greater than that of the other two. POLYM. COMPOS., 39:E2125–E2133, 2018. © 2017 Society of Plastics Engineers

D-GQDs Modified Epoxy Resin Enhances the Thermal Conductivity of AlN/Epoxy Resin Thermally Conductive Composites

“…When the amount of added AlN was between 10–20 wt%, the sheets’ thermal conductivities increased rapidly, because AlN particles are evenly dispersed in the matrix ER and 9-DG-ER, respectively, forming a continuous thermally conductive network structure. When the amount of added AlN was 20 wt%, the λ values of the AlN/DG-ER sheet and the AlN/ER sheet reached 1.31 and 0.83 W·m −1 ·K −1 , respectively, and the λ value of the AlN/DG-ER sheet was higher than previously reported [ 43 , 44 ]. When the amount of AlN was further increased, the λ values of both the AlN/DG-ER sheet and the AlN/ER sheet increased more slowly.…”

“…Jiao et al [ 43 ] have achieved λ values in an epoxy composite of 0.42 W·m −1 ·K −1 by adding 17.6 vol% of AlN. Chung and Lin [ 44 ] have reported that, after adding 20 vol% of AlN to their epoxy composite, the λ value of the composite was about 0.6 W·m −1 ·K −1 . Figure 6 a presents a comparison of thermal conductivities for the AlN/DG-ER sheet and the AlN/ER sheet at the same amounts of added AlN addition.…”

Flexible Composite Phase-Change Material with Shape Recovery and Antileakage Properties for Battery Thermal Management

“…Wang et al 35 proposed a CPCM combined with poly(ethylene glycol), silica gel, and β-AlN powder to enhance the thermal conductivity further. Chung et al 36 increased the thermal conductivity of epoxy resin composites with AlN powers; the experimental results revealed that AlN fillers played a virtual role in enhancing the thermal conductivity of composites.…”

Preparation of thermally conductive polycarbonate/boron nitride composites with balanced mechanical properties

“…[1][2][3] Most polymers are both thermally and electrically insulative and the incorporation of thermally conductive fillers into polymers is thought to be a cost-effective method to suit the increasing needs of efficient thermal dissipation materials in the aeras of power electronics, heat exchangers and heat sinks among others. [4][5][6] The commonly employed fillers include: carbonaceous fillers such as graphite, [7,8] carbon nanotubes (CNT), [9] graphene, [10] carbon fibers [6,11,12] ; metallic fillers such as copper, [13] silver, [14] aluminum [15] and steel fibers [16,17] ; ceramics fillers such as hexagonal boron nitride (BN), [18,19] aluminum nitride, [20] and silicon nitride, [21] alumina. [22] Ceramic fillers have been widely employed to fabricate both thermally conductive and electrically insulating polymer composites, which exhibits potential applications in the fields of packaging and battery units for electronics as well as alternative fuel vehicles.…”