纳米MoS_2在润滑脂中的分散稳定性研究

研究了月桂酰胺丙基氧化胺分子改性纳米MoS2在润滑脂中的分散稳定性,采用红外光谱和扫描电镜表征改性后的纳米MoS2在润滑脂中的结构和存在方式。结果表明,采取月桂酰胺丙基氧化胺分子包裹MoS2的方式对纳米MoS2进行改性,使得纳米MoS2在润滑脂中的离心分油率从64%降低到25%,说明月桂酰胺丙基氧化胺改变了纳米MoS2分子的表面性质,可使其更稳定存在润滑脂中,从而更好地起到润滑作用。

STUDY OF DISPERSION STABILITY OF NANO-MOLYBDENUM DISULFIDE IN GREASE

As a solid lubricant, nano-molybdenum disulfide has an excellent tribological performance, and is applied widely in grease. However, besides its small amount, the larger specific surface area and the higher specific surface energy leads nanoparticle to reunite, then forming a larger particles and precipitation, losing the lubrication effect. This paper studied the dispersion stability of lauramidopropylamine modified nano-MoS2 in grease. The structure and state of the modified nano-MoS2 in grease was characterized by IR and SEM techniques. The results showed that the modification of wrapping MoS2 by lauramidopropylamine makes the centrifugal oil separation rate of MoS2 reduce from 64% in blank grease to 25% in modified grease, proving that the surface properties are changed by lauramidopropylamine modification, resulting in better dispersion stability in modified grease.