用不同溶剂通过两步法制备MoS2填充芳香和半脂肪聚醚酰亚胺(PEI)复合膜,采用乙酸酐和三氟乙酸酐(TFAA)封端.利用IR Prestige-21红外光谱仪表征纯PEI亚胺化程度;采用SDT Q600测试纯PEI的热转变与热稳定性能;用M-200型环块摩擦试验机考察干摩条件下分子柔顺性、封端剂、填料比例对PEI润滑膜摩擦因数一时间(μ-t)曲线的影响,以及载荷、填料比例对稳定服役阶段μ平均值(μ)的影响;采用扫描电镜观察磨损表面形貌,分析磨损机制.结果表明,半脂肪族PEI分子设计在不明显降低热稳定性能的前提下,显著降低了聚合物的Tg.PEI润滑膜的μ值随着摩擦时间的增加先上升后下降,但波动时间较短,μ随后逐渐升高直至润滑失效.柔性结构、三氟乙酸酐封端和适当的填料比有利于改善摩擦性能,填充70 wt%MoS2的氟化酸酐封端PEI-2具有最低为0.027的(μ)值.PEI润滑膜的(μ)值还与载荷、MoS2填料比有关.
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