Abstract
Herein, a cigarette filter-templated graphene/epoxy composite was prepared with enhanced thermal conductive properties. The through-plane thermal conductivity of the epoxy composite was up to 1.2 W mK−1, which was 4 times that of it in the in-plane (0.298 W mK−1) after only 5 filtration cycles. The thermal conductive anisotropy and improvement in the through-plane thermal conductivity of the epoxy composite were attributed to the particular structure of cigarette filter-templated graphene in the epoxy matrix. The unique structure formed effective conductive pathways in the composite to improve the thermal transportation properties. The excellent thermal transportation properties allow the epoxy composite to be used as an efficient heat dissipation material for thermal management applications.
Highlights
With the development of modern electronic and electrical industries, cooling has become the main factor that affects the working stability and lifetime of devices.[1,2] aided by the miniaturization of electronic devices, there is a growing demand for high thermal conductive materials for electronic components
Commercial graphene nanoplatelet (GNP) powders were produced by the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (China)
An obvious precipitation was observed in the GNP dispersion before washing and tip sonication due to the distinct agglomeration of graphene
Summary
With the development of modern electronic and electrical industries, cooling has become the main factor that affects the working stability and lifetime of devices.[1,2] aided by the miniaturization of electronic devices, there is a growing demand for high thermal conductive materials for electronic components. Polymer materials are generally good candidate materials.[3] Due to its excellent chemical resistance, high mechanical strength, and insulation, epoxy is considered an ideal material for electronic packing.[4] its thermal conductivity is only 0.2 W mKÀ1, which enormously limits its widespread use as an electronic packing material.[5] multiple high thermal conductivity nanomaterials, such as boron nitride nanosheets, alumina, and graphene, have been introduced into epoxy resin to enhance its thermal transport properties.[6,7,8,9,10,11] simple blendingprocessed epoxy-based composites commonly cannot achieve high thermal conductivity with a low nano ller loading.[12,13,14] the design and fabrication of effective heat conductive paths in the composites are crucial for the next-generation of electronic packing materials. We have developed a strategy to build 3D graphenebased composites, cigarette lter-templated graphene/epoxy (CFTG/Ep) composites, with anisotropic thermal diffusivity. The preparation process of the epoxy composite with cigarette lter-templated graphene (CFTG) is illustrated in Scheme 1
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