Adjustable micro-structure, higher-level mechanical behavior and conductivities of preformed graphene architecture/epoxy composites via RTM route

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• 作者：Kunyue Teng ; Ya Ni ; Wei Wang ; Haibo Wang ; Zhiwei Xu ; ^{xuzhiwei@tjpu.edu.cn} ; Lei Chen ; Liyun Kuang ; Meijun Ma ; Hongjun Fu ; Jing Li
• 关键词：Preformed graphene architecture/epoxy composites ; Resin transfer molding ; Adjustable micro-structure ; Mechanical behavior
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：94
• 期：Complete
• 页码：178-188
• 全文大小：4076 K
• 卷排序：94

文摘

With respect to the requirement for good dispersibility and ordered arrangement for graphene in three dimensional graphene architecture (3DGA) and the performance for epoxy-based composites, 3DGA was synthesized in various pore diameters and RTM was introduced into the fabrication of 3DGA/epoxy composites compared to the graphene/composites in direct-mixing method. Mechanical modulus and strength of 3DGA/epoxy composites increased by one or two times compared with pure epoxy. Relative to composites in direct-mixing method, the increase in compressive and flexural strength of 3DGA/epoxy composites was at least twofold to tenfold. On account of the decreased pore size for 3DGA, the compressive and flexural strength was in noticeable improvement of 41% and 78%, respectively. With distinct network connecting structure of 3DGA, over 5 orders of magnitude enhancement took place in electrical conductivities of thermal reduced 3DGA/epoxy composites. It was conducive to prepare high performance composites by adjusting the internal structure of graphene/epoxy composites.