The random distribution of graphene in epoxy matrix hinders the further applications of graphene-epoxy composites in the field of tribology.Hence,in order to fully utilize the anisotropic properties of graphene,highly aligned graphene-epoxy composites(AGEC)with horizontally oriented structure have been fabricated via an improved vacuum filtration freeze-drying method.The frictional tests results indicated that the wear rate of AGEC slowly increased from 5.19×10-6 mm3/(N·m)to 2.87×10-5 mm3/(N·m)with the increasing of the normal load from 2 to 10 N,whereas the friction coefficient(COF)remained a constant of 0.109.Compared to the neat epoxy and random graphene-epoxy composites(RGEC),the COF of AGEC was reduced by 87.5％and 71.2％,and the reduction of wear rate was 86.6％and 85.4％at most,respectively.Scanning electron microscope(SEM)observations illustrated that a compact graphene self-lubricant film was formed on the worn surface of AGEC,which enables AGEC to possess excellent tribological performance.Finally,in light of the excellent tribological properties of AGEC,this study highlights a pathway to expand the tribological applications of graphene-epoxy composites.

Yuefeng DU;Zhenyu ZHANG;Dong WANG;Lezhen ZHANG;Junfeng CUI;Yapeng CHEN;Mingliang WU;Ruiyang KANG;Yunxiang LU;Jinhong YU;Nan JIANG

Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education,Dalian University of Technology,Dalian 116024,China;Beijing Spacecrafts Manufacturing Factory Co.,Ltd.,China Academy of Space Technology,Beijing 100094,China;Weichai Power Co.,Ltd.,Weifang 261061,China;Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology and Engineering(NIMTE),Chinese Academy of Sciences,Ningbo 315201,China

摩擦（英文）

[1]Yuefeng DU;Zhenyu ZHANG;Dong WANG;Lezhen ZHANG;Junfeng CUI;Yapeng CHEN;Mingliang WU;Ruiyang KANG;Yunxiang LU;Jinhong YU;Nan JIANG-.Enhanced tribological properties of aligned graphene-epoxy composites)[J].摩擦（英文）,2022(06):854-865

AGEC,RGEC

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