纳米二硫化钼的水热法可控制备及极压性能研究

发布时间：2018-01-06 01:16

本文关键词：纳米二硫化钼的水热法可控制备及极压性能研究　出处：《润滑与密封》2017年09期 　论文类型：期刊论文

【摘要】：为获得产率高、重复性好的纳米二硫化钼制备工艺,提出纳米级二硫化钼的水热法可控制备方法。以钼酸钠、硫代乙酰胺为前驱体,分别以聚乙二醇(PEG-20 000)、十六烷基三甲基氯化铵(CTAC)、无水乙醇为表面活性剂,利用水热法制备出球状和花状纳米二硫化钼粒子。通过X射线衍射仪、扫描电子显微镜对产物特性进行表征,通过四球摩擦磨损试验机考察2%纳米二硫化钼在N46润滑油中的极压性能测试。结果表明:酸性环境下,添加表面活性剂PEG-20 000和CTAC可得到球状结构的纳米二硫化钼颗粒,粒径均匀,粒径约为100 nm;而添加无水乙醇时可得到花状结构的纳米二硫化钼颗粒,在硫酸和盐酸环境下粒径分别为190和70 nm;在硫酸环境下,以聚乙二醇为表面活性剂时二硫化钼产率最高,可达78.82%;制备的纳米球状二硫化钼作为润滑油添加剂显著提高了润滑油的极压性能,与工业二硫化钼相比,最大无卡咬负荷最大可提高42%左右。
[Abstract]:In order to obtain the preparation process of nanometer molybdenum disulfide with high yield and good reproducibility, a method of hydrothermal controlled preparation of nanometer molybdenum disulfide was proposed. Sodium molybdate and thioacetamide were used as precursors. Polyethylene glycol (PEG-20), hexadecyltrimethylammonium chloride (CTAC) and anhydrous ethanol were used as surfactants, respectively. Spherical and flower-shaped nano-molybdenum disulfide particles were prepared by hydrothermal method and characterized by X-ray diffraction and scanning electron microscopy. The extreme pressure properties of 2% nanometre molybdenum disulfide in N46 lubricating oil were investigated by a four-ball friction and wear tester. The nano-molybdenum disulfide particles with spherical structure can be obtained by adding surfactant PEG-20 000 and CTAC. The particle size is uniform and the particle size is about 100nm. The flower-like molybdenum disulfide nanoparticles were obtained by adding anhydrous ethanol. The particle sizes of molybdenum disulfide nanoparticles in sulfuric acid and hydrochloric acid were 190 and 70 nm, respectively. In sulfuric acid environment, molybdenum disulfide yield is the highest when polyethylene glycol is used as surfactant, which can reach 78.82%. The prepared nano-ball molybdenum disulfide as a lubricating oil additive can significantly improve the extreme pressure performance of the lubricating oil. Compared with the industrial molybdenum disulfide, the maximum nip free load can be increased by about 42%.
【作者单位】：华北理工大学机械工程学院;燕山大学材料科学与工程学院;
【基金】：河北省自然科学基金项目(E2016209331)
【分类号】：TB383.1;TQ136.12
【正文快照】： 具有层状结构的过渡金属二元化合物在润滑、催化和光电器件等领域拥有独特的性能,是国内外研究热点。二硫化钼(Mo S2)常态为黑色固体粉末,具有金属光泽,是一种具有抗磁性和半导体性质的典型的过渡金属二元化合物,因其独特的结构特点而具有优异的减摩、抗磨性能以及极强的亲金

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