石墨烯改性润滑油的悬浮分散特性和摩擦学性能

doi:10.11901/1005.3093.2017.798

材料研究学报

2019, Vol. 33

Issue (1): 59-64 DOI: 10.11901/1005.3093.2017.798

研究论文

本期目录 | 过刊浏览

石墨烯改性润滑油的悬浮分散特性和摩擦学性能

佟钰¹,李宛鸿¹,董嘉¹,宋学君¹,王函^2,³,曾尤^2,³(

)

1. 沈阳建筑大学材料科学与工程学院沈阳 110168
2. 中国科学院金属研究所沈阳材料科学国家研究中心沈阳 110016
3. 中国科学技术大学材料科学与工程学院沈阳 110016

Suspension Dispersibility and Tribological Properties of Graphene-modified Lubricant Oil

Yu TONG¹,Wanhong LI¹,Jia DONG¹,Xuejun SONG¹,Han WANG^2,³,You ZENG^2,³(

)

1. School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China
2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

引用本文:

佟钰,李宛鸿,董嘉,宋学君,王函,曾尤. 石墨烯改性润滑油的悬浮分散特性和摩擦学性能[J]. 材料研究学报, 2019, 33(1): 59-64.
Yu TONG, Wanhong LI, Jia DONG, Xuejun SONG, Han WANG, You ZENG. Suspension Dispersibility and Tribological Properties of Graphene-modified Lubricant Oil[J]. Chinese Journal of Materials Research, 2019, 33(1): 59-64.

全文: PDF(2921 KB) HTML

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%。

关键词 ：无机非金属材料, 石墨烯, 改性, 悬浮分散, 摩擦磨损

Abstract：

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 by 74.78% 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%.

Key words： inorganic non-metallic materials graphene surface modification suspensibility and dispersibility friction and wear

收稿日期: 2018-01-11

ZTFLH:

TH117

基金资助: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)

作者简介: 佟钰，男，1972年生，副教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.798 或 https://www.cjmr.org/CN/Y2019/V33/I1/59

图1 GNS石墨烯的微观结构表征

图2 石墨烯改性润滑油的紫外-可见光吸收光谱和吸光度-浓度关系

图3 超声处理对石墨烯-润滑油分散体系吸光度的影响

图4 十二烷基苯磺酸钠SDBS用量对石墨烯改性润滑油吸光度的影响

表1 在不同浓度条件下GNS石墨烯改性润滑油的推荐分散工艺参数

图5 石墨烯掺量对改性润滑油摩擦性能的影响

图6 0.025 mg/mL浓度GNS石墨烯引入对磨斑表面形貌的影响

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