摘要
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。
Li-intercalated MoS2 compounds（ LixMoS2 ） were prepared by intercalating MoS2 with lithium in a solution of n-butyl lithium in hexane. The effects of reaction temperature, mass ratio of the reactants and reaction time were studied. It was found that LixMoS2 could be obtained when the molar ratio of n-C4H9 Li and MoS2 was 5 - 9, temperature 30℃, and time 36-48 h under mechanical stirring. The MoS2 suspensions with different intercalation degrees were produced after LixMoS2 was exfoliated in water. MoS2 with different intercalation contents were characterized with XRD, and it was concluded that the bigger the x value in LixMoS2, the broader the diffraction peaks of MoS2, the smaller the grain, and the worse the crystal lattice. The effect of variation of x in LiMoS2 on the lubricity of the aqueous suspension of exfoliated LixMoS2 was studied via fourball tribometer. It was found that both friction coefficient and wear scar diameter decreased initially, and then increased with x value within a range of 0. 618 - 1.39, and the best wear resistance and friction reduction were presented when the x in LixMoS2 was 0. 75.
出处
《应用化学》
CAS
CSCD
北大核心
2008年第2期181-184,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金资助项目(50475071)
关键词
插层
MOS2
摩擦学性能
intercalation, MoS2, tribological performance
