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合成β-环糊精与油酸的包合物,以包合物作为一种润滑添加剂,用四球法研究了载荷、摩擦时间及添加量对其摩擦学性能的影响,并分析了润滑机理。结果表明,在196、294和392 N载荷下,添加包合物的润滑液的摩擦系数均随时间的增加逐渐减小。在各种含量下,包合物的抗磨性能都优于β-CD和油酸的,含量为0.9%时,添加包合物的润滑液具有最佳的减摩效果。在摩擦过程中,包合物主体β-环糊精被分解,释放客体油酸,油酸通过化学吸附形成羧酸皂膜起主要润滑作用,β-环糊精的分解片段形成羟基吸附膜和碳沉积膜起辅助促进作用,二者共同作用形成的复合润滑膜具有良好的摩擦学性能。
The inclusion complex of β-cyclodextrin and oleic acid was synthesized. The inclusion complex was used as a lubricant additive. The tribological properties of the β-cyclodextrin inclusion complex were studied by four-sphere method. The tribological properties were also studied. The lubrication mechanism was also analyzed. The results show that under the loading of 196, 294 and 392 N, the friction coefficient of lubricating fluid with inclusion compound decreases gradually with the increase of time. At various contents, the anti-wear property of the inclusion compound is better than that of β-CD and oleic acid. When the content is 0.9%, the inclusion complex lubricant has the best anti-friction effect. During the rubbing process, β-cyclodextrin, an inclusion complex, is decomposed and the guest oleic acid is released. Oleic acid plays a major role in lubricating the carboxylic acid soap film formed by chemical adsorption. The β-cyclodextrin decomposition fragment forms a hydroxyl adsorption film and Carbon deposition film plays an auxiliary role in promoting the formation of the composite lubricating film has good tribological properties.