Graphene size-dependent modulation of graphene frameworks contributing to the superior thermal conductivity of epoxy composites

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	Graphene size-dependent modulation of graphene frameworks contributing to the superior thermal conductivity of epoxy composites
	Yang, Minghui; Hou, Hao; Dai, Wen; Yan, Qingwei; Lv, Le; Alam, Fakhr E.; Yao, Yagang; Zeng, Xiaoliang; Xu, Jian-Bin; Yu, Jinhong
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2018
卷号	6 期号:25 页码:12091-12097
关键词	Polyimide Composites Transport-properties Polymer Composites Layer Graphene Nanocomposites Oxide Foam Nanotubes Hybrid Filler
英文摘要	Vacuum filtration is a highly effective and easy scale-up approach and has been widely used to fabricate graphene monoliths, such as graphene paper and graphene frameworks for various applications. In general, the microstructure of filtrated monoliths exhibits layer-by-layer stacking of graphene sheets due to the directional flow-induced assembly process. In this work, we found that the horizontally oriented structure of filtrated graphene frameworks can be modulated to an approximately isotropic arrangement by lowering the lateral size of graphene sheets. This size-dependent microstructure transition from anisotropic to isotropic was further confirmed by measuring the in- and through-plane thermal conductivity of the graphene/epoxy composites with different arrangements of graphene frameworks as a filler. Optimally, we obtained an epoxy composite embedded with a quasi-isotropic graphene framework (QIGF) by a simple two-step process: vacuum filtration of small graphene sheets to obtain the framework followed by the infiltration of epoxy resin. Based on the interconnected graphene sheets with an approximately isotropic arrangement, QIGF provides heat channels of graphene-graphene along both the in- and through-plane directions within epoxy. With a low graphene loading of 5.5 wt%, QIGF/epoxy (QIGF/EP) presents in- and through-plane thermal conductivities of 10.0 and 5.4 W mK(-1), respectively, which are equivalent to approximate to 55 and 29 times higher than those of neat epoxy. As compared to the current graphene/epoxy composites prepared by various methods, our QIGF/EP has the highest thermal conductivity value with this level of filler loading. Our findings provide an insight for the development of polymer composites for thermal management applications in industry.
学科主题	Materials Science ; Physics
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/17324]
专题	2018专题
推荐引用方式 GB/T 7714	Yang, Minghui,Hou, Hao,Dai, Wen,et al. Graphene size-dependent modulation of graphene frameworks contributing to the superior thermal conductivity of epoxy composites[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(25):12091-12097.
APA	Yang, Minghui.,Hou, Hao.,Dai, Wen.,Yan, Qingwei.,Lv, Le.,...&Lin, Cheng-Te.(2018).Graphene size-dependent modulation of graphene frameworks contributing to the superior thermal conductivity of epoxy composites.JOURNAL OF MATERIALS CHEMISTRY A,6(25),12091-12097.
MLA	Yang, Minghui,et al."Graphene size-dependent modulation of graphene frameworks contributing to the superior thermal conductivity of epoxy composites".JOURNAL OF MATERIALS CHEMISTRY A 6.25(2018):12091-12097.