论文部分内容阅读
采用正丁基锂直接插入法制备出不同插层程度的LixMoS2,并考察了插层反应温度、反应物摩尔量比和反应时间等因素对插层效果的影响。结果发现,控制反应物n-C4H9Li与MoS2的摩尔比为5～9、插层反应温度为30℃左右,在机械搅拌下反应36～48h制得LixMoS2,在水中剥层后能制得不同插层程度的MoS2悬浮液。采用XRD对该悬浮液中的MoS2颗粒进行了表征。结果发现,在LixMoS2中的x值越大制得的MoS2衍射峰宽化越严重,晶粒越小,晶形越差。在四球摩擦磨损试验机考察了不同插层程度的MoS2悬浮液的摩擦学性能。结果表明,x值在0.618～1.39范围的摩擦系数和磨斑直径均随着x值的变化先减小后增加,在x为0.75左右时,抗磨减摩性能达到最佳。
LixMoS2 with different intercalation degree was prepared by direct insertion of n-butyllithium, and the effects of intercalation reaction temperature, molar ratio of reactants and reaction time on the intercalation effect were investigated. The results showed that the molar ratio of n-C4H9Li to MoS2 was 5 ~ 9 and the intercalation reaction temperature was about 30 ℃. The reaction was carried out under mechanical agitation for 36 ~ 48h to obtain LixMoS2. Layer of MoS2 suspension. The MoS2 particles in this suspension were characterized by XRD. It is found that the larger the value of x in LixMoS2, the more severe the diffraction peak of MoS2 is. The smaller the crystal grain, the poorer the crystal form. Tribological properties of MoS2 suspensions with different intercalation levels were investigated in a four-ball friction and wear tester. The results show that the friction coefficient and the diameter of the worn spots with the value of x in the range of 0.618 ~ 1.39 both decrease and then increase with the change of x value. When x is about 0.75, the antiwear and antifriction properties reach the best.