TY - JOUR
T1 - Highly Exfoliated Reduced Graphite Oxide Powders as Efficient Lubricant Oil Additives
AU - Li, Yingru
AU - Zhao, Jun
AU - Tang, Cheng
AU - He, Yongyong
AU - Wang, Yongfu
AU - Chen, Ji
AU - Mao, Junyuan
AU - Zhou, Qinqin
AU - Wang, Baoyuan
AU - Wei, Fei
AU - Luo, Jianbin
AU - Shi, Gaoquan
N1 - Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2016/11/18
Y1 - 2016/11/18
N2 - Highly exfoliated reduced graphite oxide (heRGO) is prepared by thermal reduction of crude graphite oxide (GO) powders with the assistance of KOH. By using the mixtures of KOH and GO with different weight ratios (n) as the starting materials, the resulting heRGO-n powders show different microstructures and lubrication properties. The optimized heRGO-4 powders have an average particle size around 1 μm, a “loose book”-like layered microstructure, and a large specific surface area of 829.5 m2 g−1. The unique microstructure and tiny particle sizes have made this graphene material to be an extraordinary high-performance additive of poly(α-olefin) lubricant oil (type 6, PAO-6). By adding 0.5% (by weight, wt%) heRGO-4, the coefficient of friction of PAO-6 is decreased by 44% and the wear scar depth is reduced by more than 90%. The lubrication effect of heRGO-4 is much superior to that of thermally reduced graphite oxide. Given its facile, cheap, and scalable preparation process, heRGO-4 has a great potential for industrial applications.
AB - Highly exfoliated reduced graphite oxide (heRGO) is prepared by thermal reduction of crude graphite oxide (GO) powders with the assistance of KOH. By using the mixtures of KOH and GO with different weight ratios (n) as the starting materials, the resulting heRGO-n powders show different microstructures and lubrication properties. The optimized heRGO-4 powders have an average particle size around 1 μm, a “loose book”-like layered microstructure, and a large specific surface area of 829.5 m2 g−1. The unique microstructure and tiny particle sizes have made this graphene material to be an extraordinary high-performance additive of poly(α-olefin) lubricant oil (type 6, PAO-6). By adding 0.5% (by weight, wt%) heRGO-4, the coefficient of friction of PAO-6 is decreased by 44% and the wear scar depth is reduced by more than 90%. The lubrication effect of heRGO-4 is much superior to that of thermally reduced graphite oxide. Given its facile, cheap, and scalable preparation process, heRGO-4 has a great potential for industrial applications.
KW - high-efficient
KW - highly exfoliated reduced graphene oxide
KW - lubricant oil additives
KW - tribology properties
UR - http://www.scopus.com/inward/record.url?scp=84990932205&partnerID=8YFLogxK
U2 - 10.1002/admi.201600700
DO - 10.1002/admi.201600700
M3 - Article
AN - SCOPUS:84990932205
SN - 2196-7350
VL - 3
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
IS - 22
M1 - 1600700
ER -