三氟化镧纳米微粒在两种基础油中的摩擦学性能研究
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摘要
采用沉淀法制备了油胺修饰的LaF_3(OAm-LaF_3)纳米微粒,并对纳米微粒的结构、形貌及组成进行分析.在摩擦试验机上评价了OAm-LaF_3在矿物油液体石蜡(LP)和合成酯类油中的摩擦学性能,分析其减摩抗磨作用机制.结果表明,纳米微粒OAm-LaF_3在两种基础油中均具有较好的减摩抗磨性能;在LP中的摩擦学性能最优,是由于基础油的理化性质影响添加剂在摩擦副表面的吸附,从而影响了添加剂的性能.
Lanthanum fluoride nanoparticles with surface modified by oleylamine( OAm-La F3) were prepared by precipitation method,whose structure,shape and components were analyzed. The lubrication performance of the synthesized La F3 nanoparticles as additive in mineral oil liquid paraffin( LP) and synthetic ester oil( DIOS) were investigated with the help of a four – ball machine,and the mechanisms of friction-reducing and anti-wear were discussed. The results showed that the synthesized OAm-La F3 has good friction-reducing and anti-wear in both base oils. Furthermore,the tribological properties in LP is better than that in DIOS,this is because the physical and chemical properties of the base oil affect the adsorption of additive on the surface of the friction pair,thereby affecting the performance of the additive in base oil.
Lanthanum fluoride nanoparticles with surface modified by oleylamine( OAm-La F3) were prepared by precipitation method,whose structure,shape and components were analyzed. The lubrication performance of the synthesized La F3 nanoparticles as additive in mineral oil liquid paraffin( LP) and synthetic ester oil( DIOS) were investigated with the help of a four – ball machine,and the mechanisms of friction-reducing and anti-wear were discussed. The results showed that the synthesized OAm-La F3 has good friction-reducing and anti-wear in both base oils. Furthermore,the tribological properties in LP is better than that in DIOS,this is because the physical and chemical properties of the base oil affect the adsorption of additive on the surface of the friction pair,thereby affecting the performance of the additive in base oil.
引文
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[2]Hou X,He J,Yu L,et al.Preparation and Tribological Properties of Fluorosilane Surface-Modified Lanthanum Trifluoride Nanoparticles as Additive of Fluoro Silicone Oil[J].Applied Surface Science,2014,316:515-523.
[3]Zhou J,Wu Z,Zhang Z,et al.Study on an Antiwear and Extreme Pressure Additive of Surface Coated La F3Nanoparticles in Liquid Paraffin[J].Wear,2001,249:333-337.
[4]陶小军,周静芳,张治军,等.表面修饰La F3纳米微粒的制备及表征[J].化学研究,2000,11(3):8-11.
[5]余国贤,周晓龙,李志良,等.表面修饰剂的亲油链长度对纳米氟化镧摩擦学性能的影响[J].润滑与密封,2007,32(6):50-53.
[6]余国贤,周晓龙,李志良,等.不同极性基团表面修饰剂对纳米氟化镧摩擦学性能的影响[J].润滑与密封,2007,32(7):9-12.
[7]都行,李屹,吴兵.油酸修饰氟化镧纳米添加剂对润滑脂摩擦学性能的影响[J].非金属矿,2014,37(2):79-82.
[8]张杰,朱保利,侯延超,等.水溶性La F3纳米颗粒的制备及其摩擦学行为研究[J].润滑与密封,2012,37(5):48-51.
[9]乔玉林,赵海朝,臧艳,等.石墨烯负载纳米La F3复合材料的摩擦学性能[J].稀有金属材料与工程,2017,46(5):1 293-1 298.
[10]周惠娣,岳美娥,陈建敏,等.纳米La F3微粒对聚酰亚胺粘结固体润滑涂层摩擦学性能及抗腐蚀性能的影响[J].摩擦学学报,2004,24(3):225-229.
[11]Yang G,Zhao J,Cui L,et al.Tribological Characteristic and Mechanism Analysis of Borate Ester as a Lubricant Additive in Different Base Oils[J].RSC Advances,2017,7:7 944-7 953.
[12]Jin F,Yang G,Peng Y,et al.Preparation of Borate Ester and Evaluation of Its Tribological Properties as an Additive in Different Base Oils[J].Lubrication Science,2016,28:505-519.