摘要
使用不同于传统的合成方法原位合成法在油性介质中直接合成出了油溶性的纳米颗粒。将自制的有机镍盐以分子级水平溶解于基础油之中,在常温条件下通过气液反应进行原位合成油酸修饰NiS纳米颗粒。研究表明,该方法所制备的纳米颗粒具有较好的油溶性,久置不会发生团聚和沉淀,同时可以与基础油比任意比例混合,这很好解决了增强纳米颗粒的油溶性的问题。红外光谱分析表明油酸在NiS表面发生了化学吸附,并非简单的物理吸附,—COOH的特征吸收峰明显消失。摩擦学性能研究表明所合成的纳米颗粒可以较好地提高润滑油的抗磨减摩性,在添加浓度为0.3%(质量分数)时摩擦系数和磨斑直径均达到最小,此时的抗磨减摩性能达到最佳。
We directly prepared oil soluble nanopartieles in lubricating oil medium by the means of In-situ method which was traditionally different from what had been used before. We first had organic nickel salt which was synthesized by ourselves in advance dissolved in base oil at molecular level,and prepared oleie acid-modified NiS nanopartieles in a gas-liquid reaction with the method of In-situ synthesis at room temperature. Studies showed that as-prepared nanopartieles not only had a better oil solubility, and could not aggregate and precipitate in a long time,but also could be mixed with base oil at any rates. This synthesis method greatly improve the oil solubility of nanopartieles. IR spectra study showed oleie acid did not have a physical adsorption with the surface of NiS nanopartieles but a chemical one, since characteristic absorption peak of earboxyl group disappeared in the spectrogram. Tribologieal behavior study showed that base oil added with some surfaee-modified nanopartieles had a better antiwear and friction reducing property. When the concentration of surface-modified nanopartieles was up to 0.3wt% ,the friction coefficient and wear sear diameter got to the lowest point,and at this time the antiwear and friction reducing property of base oil was optimum.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第1期154-157,161,共5页
Journal of Functional Materials
基金
国家高技术研究发展计划(863计划)资助项目(2006AA03Z226)
关键词
表面修饰
纳米颗粒
润滑油添加剂
摩擦学行为
surface modification
nanoparticles
lubricating oil additives
tribological behavior
