温度梯度下SAMs膜对油滴迁移行为控制及减摩效果试验研究  

Control of Oil Droplet Migration Behavior and Friction Reduction Effect of SAMs Film under Temperature Gradient

作　　者：纪学成 刘长松 吴安琪 栗心明 JI Xuecheng;LIU Changsong;WU Anqi;LI Xinming(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Shandong Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520

出　　处：《摩擦学学报（中英文）》2024年第8期1043-1049,共7页Tribology

基　　金：山东省高等学校青创科技支持计划项目(2019KJB010);国家自然科学基金项目(51875299)资助。

摘　　要：采用自组装单分子膜技术以及局部紫外光刻技术相结合的方法,制备了条形润湿性表面,用于解决由温度梯度作用造成的油滴热毛细迁移而导致的接触区域乏油问题.使用高速摄像机以及接触角测量仪,对温度梯度下,液体石蜡在所制备表面与原始不锈钢表面上的迁移速度、迁移距离及接触角进行了对比.结果表明:在不锈钢表面设计的条形图案能够有效地抑制油滴的热毛细迁移现象.将制备表面进一步应用于摩擦磨损试验中,发现所制备表面能使液体石蜡在摩擦的过程中始终汇聚在摩擦接触区,减缓了接触区乏油,能够明显减少摩擦磨损.此研究为解决由油滴热毛细迁移而引起的接触区乏油问题提供了新思路和新方法.Self-assembled monolayers(SAMs)and local ultraviolet lithography were used to prepare the wettable strip surface,which was used to solve the problem of oil starvation in the contact area caused by the thermocapillary migration of oil droplets due to the temperature gradient.Using a high speed camera and a contact angle measuring instrument,the migration speed,migration distance and contact angle of liquid paraffin on the prepared surface and the original stainless steel surface were compared under a temperature gradient.The results showed that the thermocapillary migration of oil droplets could be effectively inhibited by the stripe pattern designed on the stainless steel surface.In addition,friction and wear tests were then carried out on the prepared area,which showed that the prepared area was able to keep the liquid paraffin in the friction contact area during friction,which slowed down oil starvation in the contact areas and significantly reduced the friction and wear.This study provided a new idea and method for the solution of the problem of oil starvation in the contact area due to the thermocapillary migration of oil droplets.

关 键 词：自组装单分子膜(SAMs) 温度梯度 热毛细迁移 乏油 减摩 

分 类 号：TH117.2[机械工程—机械设计及理论]