摘要
用分光光度法定量评定润滑油中石墨烯的浓度,根据石墨烯的浓度(0.0125～0.075 mg/mL)与润滑油吸光度之间的正相关特性考察了石墨烯的初始浓度、超声处理时间以及表面活性剂掺量等因素对石墨烯改性润滑油悬浮分散特性的影响和最佳工艺参数范围,并将优化出的分散性良好、长期稳定悬浮的石墨烯改性润滑油用于摩擦学性能测试。结果表明,适当的超声分散和表面改性可提高石墨烯改性润滑油的分散悬浮效果。石墨烯浓度为0.025 mg/mL时石墨烯改性润滑油的摩擦系数降低74.78%,磨斑尺寸减小了28.33%。
The concentration of graphene in lubricant oil was measured by means of spectrophotometric method, in terms of an apparent linear relationship between the absorbance and the graphene concentration(0.0125~0.100 mg/mL) of lubricant oils. By making use of such linear relationship, the effect of the initial concentration of graphene, ultrasonic treatment time and surfactant content on the suspensibility and dispersibility of the graphene-modified lubricant oil were assessed, and thereby, the preparation processing was optimized. The as-prepared graphene-modified lubricant oil showed typically outstanding suspension dispersibility for long-term, which should be attributed to the optimization of ultrasonic time and surfactant concentration. The graphene-modified lubricant oil also presented excellent performance in friction reduction and wear resistance, namely the friction coefficient was found to decrease by74.78% for the lubricant oil intermingled with 0.025 mg/mL graphene in comparison with the blank oil, correspondingly the wear scar diameter reduced by 28.33%.
作者
佟钰
李宛鸿
董嘉
宋学君
王函
曾尤
TONG Yu;LI Wanhong;DONG Jia;SONG Xuejun;WANG Han;ZENG You(School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2019年第1期59-64,共6页
Chinese Journal of Materials Research
基金
辽宁省高等学校基本科研项目(LJZ2017016)
沈阳材料科学国家实验室项目(2017RP10)
沈阳市科技局项目(17-231-1-66)~~
关键词
无机非金属材料
石墨烯
改性
悬浮分散
摩擦磨损
inorganic non-metallic materials
graphene
surface modification
suspensibility and dispersibility
friction and wear
作者简介
佟钰,男,1972年生,副教授;通讯作者:曾尤,研究员,yzeng@imr.ac.cn,研究方向为碳纳米结构及其复合材料
