Preparation of Three-Dimensional Carbon Network Reinforced Epoxy Composites and Their Thermal Conductivity
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RESEARCH ARTICLE
Preparation of Three‑Dimensional Carbon Network Reinforced Epoxy Composites and Their Thermal Conductivity Jing Li1 · Kai Song1 · Hetong Zhang1 · Yue Guo1 · Fang He1,2 · Naiqin Zhao1,2 · Chunsheng Shi1,2 Received: 16 January 2020 / Revised: 13 March 2020 / Accepted: 23 March 2020 © Tianjin University and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract As a thermosetting resin with excellent properties, epoxy resin is used in many areas such as electronics, transportation, aerospace, and other fields. However, its relatively low thermal conductivity limits its wide application in more demanding fields. Here, a three-dimensional carbon (3DC) network was prepared through NaCl template-assisted in situ chemical vapor deposition (CVD) and used to reinforce epoxy resin for enhancing its thermal conductivity. The 3DC was prepared with a molar ratio of sodium atom to carbon atom of 100:20, and argon atmosphere in CVD led to an optimal improvement in the thermal conductivity of epoxy resin. The thermal conductivity of epoxy resin increased by 18% when the filling content was 3 wt.% of 3DC network because of the high contact area, uniform dispersion, and enhanced formation of conductive paths with epoxy resin. As the amount of 3DC addition increases, the thermal conductivity of composites also increases. As an innovative exploration, the work presented in this paper is of great significance for the thermal conductivity application of epoxy resin in the future. Keywords Three-dimensional carbon · NaCl template · Epoxy resin · Composites · Thermal conductivity
Introduction With the rapid development of industrial modernization in recent decades, instrumentations and equipment tend to be integrated and miniaturized, resulting in a large amount of heat generated during the operation of the equipment. Such serious heat will affect the operation performance and working life of the equipment if they are not eliminated in time, leading to additional economic losses [1]. Therefore, many researchers are focusing on the field of thermally conductive materials [2, 3]. Compared with traditional metal-based thermally conductive materials, polymers have attracted extensive attention because of their advantages such as lightweight, good chemical stability, and easy fabrication [4, 5]. However, poor thermal conductivity and low thermal * Fang He [email protected] 1
Tianjin Key Laboratory of Composite and Functional Materials, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin 300072, China
2
stability (especially thermoplastic polymers) limit their demanding applications [6]. In general, two methods can be adopted to improve the thermal conductivity of polymer-based thermally conductive composites. One is to orient the thermally conductive fillers in the matrix and endow the composites with good thermal conductivity along a certain direction [7–
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