文献类型：期刊文献

中文题名：含纳米LaF_3液体润滑油添加剂的制备及其润滑性能

英文题名：PREPARATION OF LIQUID LUBRICANT ADDITIVE CONTAINING LaF_3 NANO-PARTICLES AND ITS LUBRICATING PERFORMANCE

作者：周晓龙[1];李志良[1];余国贤[1];金亚清[1];李承烈[1]

机构：[1]华东理工大学石油加工研究所,上海200237

年份：2008

卷号：24

期号：3

起止页码：325

中文期刊名：石油学报（石油加工）

外文期刊名：Acta Petrolei Sinica(Petroleum Processing Section)

收录：CSTPCD;;EI(收录号：20082911385647);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD_E2011_2012】；

基金：国家重大基础研究前期研究专项项目(2004CCA05400);上海市科研计划项目(0352nm027)资助

语种：中文

中文关键词：纳米LaF3;液体润滑油添加剂;制备;摩擦学性能

外文关键词：nano LaF3; liquid lubricant additive; preparation; tribological properties

摘要：在乙醇-水体系中,以氟化铵、氯化镧为原料,以二辛基二硫代磷酸双(β-)羟乙基十八胺盐(DOPA)为表面修饰剂,制备了表面修饰纳米LaF3,通过不同的后续处理分别得到纳米LaF3干粉和含纳米LaF3的液体润滑油添加剂。采用X射线衍射仪(XRD)、透射电镜(TEM)、傅里叶变换红外光谱仪(FT-IR)及热重仪(TG)表征了DOPA表面修饰纳米LaF3的结构及形貌,采用离心沉降法和升温法考察了在常温和高温下纳米LaF3干粉和含纳米LaF3的液体润滑油添加剂在500SN基础油中的分散稳定性,利用四球试验机考察了这2种添加剂以及表面修饰剂DOPA的摩擦学性能,并采用扫描电镜(SEM)分析了钢球表面磨斑形貌。结果表明,纳米LaF3的平均粒径为10nm左右,液体添加剂中的纳米LaF3在基础油中的常温和高温分散稳定性均大大优于干粉的纳米LaF3;与DOPA及纳米LaF3干粉添加剂相比,含纳米LaF3液体添加剂的摩擦学性能最好,当500SN基础油中加入含纳米LaF3液体添加剂,LaF3质量分数为0.8%时,可使最大无卡咬负荷(PB)值由510N提高到1069N,钢球磨斑直径(WSD)减小为0.352mm。
Surface modified LaF3 nano-particles were prepared in a water-ethanol system with NH4 F and LaCl3 as the raw materials, dioctyl dithiophosphoric acid di（β-ethoxyl） stearamine salt （DOPA） as surface modifier. A nano-LaF3 powder additive and a liquid additive containing LaF3 nanoparticles were then obtained by different post-treatment methods. Morphology and structure of LaF3 nano-particles were investigated by XRD, TEM, FTIR and TG methods. The dispersion stabilities at room temperature and at high temperature of the two nano-LaF3 additives in 500SN base oil were respectively measured by the centrifugal setting method and temperature-increasing method. The tribological properties of DOPA, nano-LaF3 powder and liquid additives were investigated by four-ball machine. Wear scars on the steel ball surfaces were observed by SEM. Results showed that the average size of LaF3 nano-particles was 10 nm; The dispersion stabilities at room temperature and at high temperature of nano-LaF3 liquid additive were both better than that of nano-LaF3 powder additive; Compared with DOPA and nano-LaF3 powder additive, the nano-LaF3 liquid additive possessed the best tribological properties; When the nano-LaF3 liquid additive was added in 500SN base oil with LaF3 mass fraction of 0. 8%, the PB value of the oil sample was increased from 510N to 1069N, and the WSD was reduced to 0. 352 mm.