Electrophoresis-deposition construction of covalently bonded interface material with enhanced thermal conductivity

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-03-25 DOI:10.1007/s42823-024-00717-1

Hao Fu, Guang Chen, Junchang Gao, Yadong Wu, Xin Tao, Youguo Huang

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Abstract

The thermal conductivity (TC) of graphene-based/metal composites is currently not satisfactory because of the existence of large interfacial thermal resistance between graphene and metal originating from the strong scattering of phonons. In this work, 6063Al-alloy-based reduced graphene oxide (rGO) composite with strong covalent bonds interface was prepared via self-assembly, reduction, and electrophoresis-deposition processes by using 3-aminopropyl triethoxysilane (APTS) as a link agent. Structural characterizations confirmed the successful construction of strong Al-O-Si-O-C covalent bonds in the as-prepared 6063Al-Ag-APTS-rGO composite, which can promote the transfer of phonons in the interface. Benefiting from the unique structure, 6063Al-Ag-APTS-rGO (214.1 W/mK) showed obviously higher cross-plane TC than 6063Al (195.6 W/mK). Comparative experiments showed that 6063Al-Ag-APTS-rGO has better cross-plane TC than 6063Al/Ag/APTS/rGO (196.6 W/mK) prepared via physical mixing of stirring process, evidencing the significance of electrophoresis-deposition (EPD) process on constructing strong covalent bonds for improving the heat dissipation performance. Besides, the effects of different rGO contents and test temperature on the TC of the composites and their corrosion resistance were also discussed. This work demonstrated a feasible strategy for the construction of metal–carbon interface composite with improved thermal performance.

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电泳沉积构建具有增强导热性能的共价键合界面材料

目前，石墨烯基/金属复合材料的热导率（TC）并不令人满意，这是因为石墨烯与金属之间存在较大的界面热阻，其原因是声子的强烈散射。本研究以 3-aminopropyl triethoxysilane (APTS) 为连接剂，通过自组装、还原和电泳沉积工艺制备了具有强共价键界面的 6063Al-alloy 基还原氧化石墨烯 (rGO) 复合材料。结构表征证实，在制备的 6063Al-Ag-APTS-rGO 复合材料中成功构建了强 Al-O-Si-O-C 共价键，从而促进了声子在界面中的传递。得益于独特的结构，6063Al-Ag-APTS-rGO（214.1 W/mK）的横向 TC 明显高于 6063Al（195.6 W/mK）。对比实验表明，6063Al-Ag-APTS-rGO 比通过搅拌物理混合工艺制备的 6063Al/Ag/APTS/rGO（196.6 W/mK）具有更好的跨面 TC，这证明了电泳沉积（EPD）工艺在构建强共价键以提高散热性能方面的重要意义。此外，还讨论了不同 rGO 含量和试验温度对复合材料 TC 及其耐腐蚀性能的影响。这项工作证明了构建具有更佳热性能的金属-碳界面复合材料的可行策略。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.