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Tribological Performance of an Imidazolium Ionic Liquid-Functionalized SiO2@Graphene Oxide as an Additive
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-10-14 , DOI: 10.1021/acsami.1c16030 Wei Song 1 , Jincan Yan 1, 2 , Hongbing Ji 1, 3
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-10-14 , DOI: 10.1021/acsami.1c16030 Wei Song 1 , Jincan Yan 1, 2 , Hongbing Ji 1, 3
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A graphene oxide (GO)-wrapped SiO2 nanosphere was modified with a 1-methylimidazolium bis(salicylato)borate (MEIMBScB) ionic liquid to form a SiO2@GO@MEIMBScB nanocomposite. The SiO2@GO@MEIMBScB nanocomposite exhibited a core–shell structure, which was characterized by Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy, photoluminescence spectroscopy, dynamic light scattering, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The SiO2@GO@MEIMBScB nanocomposite was dispersed into poly(ethylene glycol) 400 (PEG400) as a lubricant additive, and its tribological performance was evaluated with a four-ball tribometer under 392 N at 1450 rpm for 30 min. The results showed that the SiO2@GO@MEIMBScB nanocomposite can reduce the friction coefficient by 57.27% and reduce the wear scar diameter by 16.98% at an optimized concentration. Its tribological performance was much better than the individual SiO2@GO and MEIMBScB ionic liquid and the SiO2@GO/MEIMBScB mixture. The SiO2@GO@MEIMBScB nanocomposite exhibited a synergistic effect, which was confirmed by surface analysis on a wear track. It showed that SiO2@GO@MEIMBScB can be adsorbed on the rubbing surface and form a tribo-boundary film to reduce friction and wear. A possible lubrication mechanism was proposed, which might guide the development of a novel nanolubricant additive.
中文翻译：
咪唑鎓离子液体功能化 SiO2@氧化石墨烯作为添加剂的摩擦学性能
用1-甲基咪唑鎓双（水杨酸根）硼酸盐（MEIMBScB）离子液体修饰氧化石墨烯（GO）包裹的SiO 2纳米球，形成SiO 2 @GO@MEIMBScB纳米复合材料。SiO 2 @GO@MEIMBScB 纳米复合材料表现出核壳结构，其特征在于傅里叶变换红外光谱、紫外-可见光谱、光致发光光谱、动态光散射、X 射线光电子能谱、扫描电子显微镜和透射电子显微镜. SiO 2将@GO@MEIMBScB 纳米复合材料分散到作为润滑剂添加剂的聚（乙二醇）400（PEG400）中，并使用四球摩擦计在 392 N、1450 rpm 下持续 30 分钟评估其摩擦学性能。结果表明，SiO 2 @GO@MEIMBScB纳米复合材料在优化浓度下可降低摩擦系数57.27%，磨痕直径降低16.98%。其摩擦学性能远优于单独的 SiO 2 @GO 和 MEIMBScB 离子液体以及 SiO 2 @GO/MEIMBScB 混合物。SiO 2 @GO@MEIMBScB 纳米复合材料表现出协同效应，这通过磨损轨迹的表面分析得到证实。表明 SiO 2@GO@MEIMBScB 可以吸附在摩擦表面并形成摩擦边界膜以减少摩擦和磨损。提出了一种可能的润滑机制，这可能会指导新型纳米润滑剂添加剂的开发。
更新日期：2021-10-27
中文翻译：
咪唑鎓离子液体功能化 SiO2@氧化石墨烯作为添加剂的摩擦学性能
用1-甲基咪唑鎓双（水杨酸根）硼酸盐（MEIMBScB）离子液体修饰氧化石墨烯（GO）包裹的SiO 2纳米球，形成SiO 2 @GO@MEIMBScB纳米复合材料。SiO 2 @GO@MEIMBScB 纳米复合材料表现出核壳结构，其特征在于傅里叶变换红外光谱、紫外-可见光谱、光致发光光谱、动态光散射、X 射线光电子能谱、扫描电子显微镜和透射电子显微镜. SiO 2将@GO@MEIMBScB 纳米复合材料分散到作为润滑剂添加剂的聚（乙二醇）400（PEG400）中，并使用四球摩擦计在 392 N、1450 rpm 下持续 30 分钟评估其摩擦学性能。结果表明，SiO 2 @GO@MEIMBScB纳米复合材料在优化浓度下可降低摩擦系数57.27%，磨痕直径降低16.98%。其摩擦学性能远优于单独的 SiO 2 @GO 和 MEIMBScB 离子液体以及 SiO 2 @GO/MEIMBScB 混合物。SiO 2 @GO@MEIMBScB 纳米复合材料表现出协同效应，这通过磨损轨迹的表面分析得到证实。表明 SiO 2@GO@MEIMBScB 可以吸附在摩擦表面并形成摩擦边界膜以减少摩擦和磨损。提出了一种可能的润滑机制，这可能会指导新型纳米润滑剂添加剂的开发。
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