Hybrid three-dimensional graphene fillers and graphite platelets to improve the thermal conductivity and wear performance of epoxy composites
Hybrid three-dimensional graphene fillers and graphite platelets to improve the thermal conductivity and wear performance of epoxy composites
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混合三维石墨烯填料和石墨片改善环氧复合材料的导热性和耐磨性能
DOI：
10.1016/j.compositesa.2019.05.016
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发表时间：
2019-08
期刊：
影响因子：
--
通讯作者：
Hong-Yuan Liu
中科院分区：
文献类型：
--
作者：
Helezi Zhou;Hongjian Wang;Xusheng Du;Youtian Mo;Hong Yuan;Hong-Yuan Liu
在三维石墨烯（3DGF）增强环氧树脂（EP）复合材料研究的基础上，将市售的石墨片（GP）与3DGF一起对EP进行改性，以进一步提高EP复合材料的导热性和耐磨性。值得注意的是，仅需要0.14体积%的3DGF就可以将EP的导热性提高170%，而事实上需要37倍含量的石墨填料才能实现几乎相同的增强。此外，在5.38体积%的GP和0.14体积%的3DGF的存在下，EP的热导率进一步提高了258%。同时，摩擦学试验结果表明，3DGF优于GP。用0.28vol%3DGF和5.38vol%GP改性的三元EP复合材料比用3DGF或GP改性的二元复合材料具有更低的比磨损率和摩擦系数。
Based on our recent work on the three-dimensional graphene fillers (3DGF) reinforced epoxy (EP) composite, here commercially available graphite platelets (GP) were incorporated together with 3DGF to modify EP in order to further improve the thermal conduction and wear resistance of the EP composites. Remarkably, only 0.14 vol% 3DGF was needed to enhance the thermal conduction of EP by 170%, in contrast with the fact that 37 times content of graphite fillers were required to achieve almost the same enhancement. Moreover, in the presence of both 5.38 vol% GP and 0.14 vol% 3DGF, the thermal conductivity of EP was further enhanced by 258%. Meanwhile, the tribological test results revealed the advantage of 3DGF over GP. The ternary EP composite modified with both 0.28 vol% of 3DGF and 5.38 vol% GP had much lower specific wear rate and coefficient of friction than those binary composites with either 3DGF or GP.
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