镍纳米线的制备及其对液体石蜡摩擦学的改性-《郑州大学学报(工学版)》

文章信息/Info

Title:: Preparation of Nickel Nanowires and Their Modification of Liquid Paraffin Tribology

作者:: 张锡凤; 严冲; 程晓农; 等.; 江苏大学,化学化工学院,江苏,镇江,212013, 江苏大学,材料科学与工程学院,江苏,镇江,212013

Author(s):: ZHANG Xifeng; YAN Chong; CHENG Xiaonong; etc; 1．School ofChemistry and Chemical Engineering，Jiangsu University，Zhenjiang 212013。China；2．School ofMa；erial Scienceand Engineering，Jiangsu University，Zhenjiang 212013，China

Keywords:: Nickel; nanowires; Chemical reduction method; microwave; Tribology

摘要:: 采用液相化学还原法,在水体系中以醋酸镍为前驱体,聚乙二醇6000为修饰剂,水合肼为还原剂,氢氧化钠为pH调节剂,引入微波辐照,合成长1～3 μm、直径为30～50 nm的镍纳米线.通过X-射线衍射(XRD)、透射电子显微镜(TEM)对镍纳米线进行表征.将镍纳米线、球形纳米镍作为基础油液体石蜡(LP)添加剂添加到LP中,分别在UMT-Ⅱ摩擦磨损实验机和M-2000型环/块式摩擦磨损实验机上考察添加前、后LP的摩擦磨损性能,采用扫描电子显微镜(SEM)和能谱仪(EDS)分析磨损表面形貌和表面膜元素组成及含量.结果表明:与基础油LP相比,添加纳米镍后的LP形成自修复膜,较大程度降低了摩擦系数,并获得较为平整的磨斑磨痕,显著改善LP的摩擦性能;与球形纳米镍相比,镍纳米线的添加可增加其改善LP润滑性能的程度.

Abstract:: Using liquid phase chemical reduction method, nickel acetate was used as the precursor, polyethylene glycol 6000 as modifier, hydrazine hydrate as reducing agent, sodium hydroxide as pH adjuster in the aqueous system, microwave irradiation was introduced to synthesize nickel nanowires with a length of 1~3 μm and a diameter of 30~50 nm. Nickel nanowires were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Nickel nanowires and spherical nano-nickel were added as base oil liquid paraffin (LP) additives to LP, and the friction and wear properties of LP before and after addition were investigated on UMT-II. friction and wear testing machine and M-2000 ring/block friction and wear testing machine, and the surface morphology and surface film element composition and content were analyzed by scanning electron microscope (SEM) and energy spectrometer (EDS). The results show that compared with the base oil LP, the LP after adding nano-nickel forms a self-healing film, which greatly reduces the friction coefficient, obtains relatively flat grinding marks and significantly improves the friction performance of LP. Compared with spherical nickel nanowires, the addition of nickel nanowires can increase the degree to which they improve the lubrication performance of LP.