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以硅烷偶联剂KH-570为表面改性剂,采用机械球磨法制备了不同粒径的锑纳米颗粒。将不同粒径的锑纳米颗粒添加到900SN基础油中作为试验润滑油。通过测试润滑油的吸光度考察了锑纳米颗粒在润滑油中的分散稳定性;利用往复式摩擦实验研究锑纳米颗粒作为润滑油添加剂的摩擦学性能。研究结果表明:表面改性的锑纳米颗粒由于具有空间位阻效应,表现出良好的分散性。粒径越小,分散性越好;由于锑纳米颗粒可填补到磨损表面的微坑处,其在900SN润滑油中具有优良的减摩润滑效果。粒径越小,其对磨损表面的修复效果越好。当锑纳米颗粒粒径为40 nm时,其在试验润滑油中具有很好的分散性,并表现出优异的减摩抗磨性能。
Silane coupling agent KH-570 as a surface modifier, prepared by mechanical milling antimony nanoparticles with different particle size. Antimony nanoparticles with different particle sizes were added to 900SN base oil as the test lubricant. The dispersion stability of antimony nanoparticles in lubricating oil was investigated by measuring the absorbance of lubricating oil. The tribological properties of antimony nanoparticles as a lubricating oil additive were studied by reciprocating friction experiment. The results show that the surface-modified antimony nanoparticles exhibit good dispersibility due to steric hindrance. The smaller the particle size, the better the dispersibility; antimony nano particles can wear to the micro-pits on the wear surface, which has excellent anti-friction lubrication effect in the 900SN lubricating oil. The smaller the particle size, the better the repair effect on the worn surface. When the particle size of antimony nanoparticles is 40 nm, it has good dispersibility in the test lubricating oil and exhibits excellent anti-friction and anti-wear properties.