有机小分子染料和聚阳离子分子超薄膜的制备及其摩擦学性能研究

制备了以有机小分子染料酸性红 1 8为阴离子、以聚烯丙基氯化铵和聚乙烯亚胺为聚阳离子的分子沉积膜 ,用紫外可见分光光度计、接触角测定仪和椭圆偏振光测厚仪对所制备的超薄膜进行了表征 .用DF PM型动 静摩擦系数精密测定装置考察了超薄膜的摩擦学性能 ,采用扫描电子显微镜对薄膜的磨痕表面进行了观察 .结果表明 ,所制备的超薄复合沉积膜具有良好的减摩和耐磨性能

PREPARATION AND INVESTIGATION OF THE TRIBOLOGICAL BEHAVIOR OF SMALL MOLECULAR WEIGHT ORGANIC DYE AND POLYCATION ULTRA THIN FILMS

Polyelectrolyte ultra-thin multilayers were prepared on single crystal silicon by alternative deposition of acid red 18 as anion and poly(ethylenimine)and poly(allylamine hydrochloride) as polycations.The films were characterized by means of ultra violet-visible light absorption spectrometry and contact angle measurement.The thickness of the ultra-thin self-assembled films was determined with an ellipsometric thickness tester.The friction and wear behavior of the ultra-thin films under one-way dry sliding against AISI-52100 steel was examined on a DF-PM friction coefficient measurement apparatus in a ball-on-block configuration.As the results,the deposition of the ultra-thin films on the single crystal Si leads to alternate variation in the contact angles of distilled water thereon.Both the two kind of ultra-thin films show good friction-reducing and antiwear behavior in sliding against the steel at a relatively low load,while the tribological behavior of the films is dependent on the bilayer numbers of the films.The ultra-thin film of eight bilayers made from poly(ethylenimine) and acid red 18 records a low friction coefficient in sliding against the steel even above a sliding cycle of 2000.Thus it might be a potential candidate as the friction-reducing and wear-resistant ultra-thin film material for some micro devices.