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在 2 0 0 SN矿物基础油中 ,用原位合成法、复分解法以及微波辅助合成法分别合成了月桂酸铅、油酸铅、环烷酸铅、硬脂酸铅和烷基水杨酸铅 .用四球摩擦磨损试验机 ,在高速低负荷及低速高负荷两组试验条件下评价了其摩擦学性能 .结果表明 :不同结构羧酸铅的油溶性、抗磨减摩性能以及抗极压性能存在较大差异 ,其摩擦学性能与羧基结构密切相关 ,环烷酸铅和烷基水杨酸铅的油溶性最好 ;月桂酸铅的抗磨性能和抗极压性能最好 ,油酸铅的减摩性能最好 .通过对铅盐分子结构及相应钢球磨斑表面进行扫描电子显微镜和 X射线光电子能谱分析 ,发现铅盐对基础油摩擦学性能的改善归因于摩擦过程中有机铅盐在摩擦副表面形成一定强度的吸附膜以及部分吸附膜转化为铅氧化物膜的摩擦化学反应 .铅盐烷基链结构的不同使其在摩擦副表面的吸附量和吸附强度不同 ,从而影响润滑油膜的化学组成和物理性能 ,并进而产生摩擦学性能差异
In 2000 SN mineral base oil, lead laurate, lead oleate, lead naphthenate, lead stearate and lead alkyl salicylate were synthesized by in situ synthesis, metathesis and microwave assisted synthesis respectively The tribological properties of the lead carboxylates were evaluated by four-ball friction and wear testing machine under the conditions of high speed, low load and low speed and high load.The results showed that the oil-soluble, antiwear and antifriction properties of lead carboxylate with different structures and the anti-extreme pressure performance The tribological properties are closely related to the carboxyl structure, lead naphthenate and alkyl salicylate lead oil solubility is best; the anti-wear properties and anti-extreme pressure performance of lead laurate lead the best, lead oleate Of the best friction reduction performance.By scanning electron microscopy and X-ray photoelectron spectroscopy analysis of lead salt molecular structure and the corresponding ball surface, it is found that the improvement of the tribological properties of lead salt on the base oil is attributed to the organic lead Salt in the friction surface of the formation of a certain strength of the adsorption film and part of the adsorption film into the lead oxide film friction chemical reaction lead alkyl alkyl chain structure so that the friction surface of the adsorption amount and adsorption strength are different, Thus affecting the lubricant film chemical composition and physical properties, and thus produce tribological properties difference