油溶性纳米铜的制备、表征及其对SF15W/40汽油机油摩擦性能的影响  

Preparation,Characterization of Oil-soluble Copper Nanoparticles and the Tribological Property as Additive in SF15W/40 Lubricating Oil

作　　者：严冲[1] 张锡凤[2] 程晓农[1] 袁剑[2] 曹志娟[2] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]江苏大学化学化工学院,江苏镇江212013

出　　处：《润滑与密封》2009年第11期27-30,共4页Lubrication Engineering

基　　金：江苏省摩擦学重点实验室项目(kjsmcx07004);江苏大学高级人才启动基金项目(08JDG049)

摘　　要：采用界面生长法,以醋酸铜为母体,抗坏血酸(Vc)为还原剂,吐温-85为修饰剂,正丁醇为生长剂,合成了粒径约15.5nm的油溶性球形纳米铜粉;通过X-射线衍射(XRD)和透射电子显微镜(TEM)对纳米铜粉进行了表征;将其作为润滑油添加剂分散于SF15W/40汽油机油中制得纳米润滑油;通过高浓度激光粒度仪考察了纳米润滑油的分散稳定性;通过UMT-Ⅱ摩擦磨损实验机考察了纳米润滑油的摩擦学性能;采用扫描电子显微镜(SEM)分析了磨损表面形貌。结果表明:纳米铜粉在润滑油中具有优异的分散稳定性;纳米铜粉显著改善了SF15W/40汽油机油的润滑性能,其最佳添加量为0.8%。分析认为纳米铜在摩擦表面的划痕和犁沟处沉积并铺展成膜,从而改善了摩擦磨损性能。15.5 nm diameter oil-soluble sphere nano-copper was prepared by oil-water interface growth method,using copper acetate tetrahydrate as precursor, ascorbic acid as reductant, polyethylene sorbitan monooleate （ Tween-85 ） as modifier, and 1-butanol as growth agent. The as-prepared copper nanopieces were characterized by XRD, and TEM. The dispersion stabilization and tribological behavior of the oil-soluble copper nanoparticles as SF15W/40 lubricating oil additive were investigated on high-concentration laser granularity scatter analyzer and ball-on-disk UMT-Ⅱ tribometer. The worn surface morphology was analyzed by means of SEM. Experimental results show that the oil-soluble nano-Cu is wetting effect in SF15W/40 lubricating oil and keeps long-term finely dispersed, and SF15W/40 lubricating oil＇ s tribologicai property is markedly enhanced with the oil-soluble nano-copper as its additive. The synthetic additive at 0. 8% has the lowest friction coefficient and wear loss. The oil-soluble Cu nanoparticles agglomerate discontinuous deposited, extrude, melt, spread, and form a film in micro-defects on the worn surfaces, then improve the friction-reducing ability and antiwear ability of SF15W/ 40 lubricating oil.

关 键 词：油溶性 纳米铜 界面生长法 润滑油添加剂 摩擦学性能 

分 类 号：TB383[一般工业技术—材料科学与工程] O614.121[理学—无机化学]