摘要
将纳米材料作为润滑添加剂已经成为当前摩擦学研究的热点。为了制备具有良好抗磨性和分散性的纳米添加剂,对油酸修饰PbS纳米微粒的合成方法与润滑性能进行了研究。在液体石蜡中原位合成了油酸修饰的PbS纳米微粒,将其在离心机中离心后可获得稳定的溶液。采用红外光谱、透射电子显微镜(TEM)对产物结构和形貌进行了表征,利用四球摩擦磨损试验机对其作为润滑油添加剂的抗磨性能进行了评价,并用扫描电子显微镜(SEM)对磨斑表面形貌进行了观察。在试验基础上,探讨了纳米微粒在溶液中的稳定机制。结果表明,原位合成的PbS微粒表面有油酸修饰层存在,从而使其在液体石蜡中具有良好的分散性能,粒度小于15nm,油酸修饰的PbS纳米微粒作为添加剂在液体石蜡中的添加量为0.3%(质量分数)时的磨斑直径最小,磨斑表面光滑平整。
Oleic acid-coated PbS nanoparticles were in-situ synthesized in liquid paraffin. The chemical structure and morphology of the resulting surface-capped nanoparticles were characterized by means of infrared spectrometry (IR) and transmission electron microscopy (TEM). The tribological properties of the surface-capped nanoparticles as an antiwear additive were evaluated using a four-ball friction and wear test machine, while the wear scar surface was observed using a scanning electron microscope. Results showed that oleic acid capped PbS nanoparticleshad good dispersion capacity in organic solvents, and they had an average diameter of less than 15 nm. The surface-capped PbS nanoparticles as an additive in liquid paraffin showed good antiwear ability. Namely, the smallest wear scar diameter on steel balls was registered at an additive concentration of 0. 3 % (mass fraction) , and the wear scar surface in this case was smooth.
出处
《材料保护》
CAS
CSCD
北大核心
2008年第12期17-20,共4页
Materials Protection
关键词
PbS原位合成
油酸修饰
添加剂
抗磨性能
PbS
oleic acid capping
insitu synthesis
additive
antiwear behavior
