Wu Xinhu, Gong Kuiliang, Zhao Gaiqing, Lou Wenjing, Wang Xiaobo, Liu Weimin
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 PR China
University of Chinese Academy of Sciences Beijing 100049 PR China.
RSC Adv. 2018 Jan 25;8(9):4595-4603. doi: 10.1039/c7ra11691h. eCollection 2018 Jan 24.
Red phosphorus (P) was covalently attached to graphene nanosheets (Gr) using high-energy ball-milling under a nitrogen atmosphere. Benefiting from the formation of phosphate and P-O-C bonds on graphene surfaces, the resulting phosphorus-graphene (P-Gr) hybrids exhibited excellent dispersion stability in polyalkylene glycol (PAG) base oil compared with graphene. Moreover, tribological measurement indicated that addition of 1.0 wt% P-Gr into PAG resulted in significant reduction in friction coefficient (up to about 12%) and wear volume (up to about 98%) for steel/steel contact at 100 °C, which was likely due to the formation of a boundary lubrication film on the sliding surfaces during the friction and wear processes. XPS analysis demonstrated that the tribofilm is composed of FeO, FeO, FeOOH, FePO, and the compounds containing C-O-C and P-O bonds.
在氮气气氛下，通过高能球磨将红磷（P）共价连接到石墨烯纳米片（Gr）上。得益于石墨烯表面形成的磷酸盐和P-O-C键，与石墨烯相比，所得的磷-石墨烯（P-Gr）杂化物在聚亚烷基二醇（PAG）基础油中表现出优异的分散稳定性。此外，摩擦学测量表明，在100℃下，向PAG中添加1.0 wt%的P-Gr可使钢/钢接触的摩擦系数显著降低（高达约12%），磨损体积显著降低（高达约98%），这可能是由于在摩擦和磨损过程中，滑动表面上形成了边界润滑膜。XPS分析表明，摩擦膜由FeO、FeO、FeOOH、FePO以及含有C-O-C和P-O键的化合物组成。
