沉积时间对MPTS自组装膜摩擦学性质的影响  

The Effect of Sedimentary Time on Tribological Properties for Self-assembled Films

作　　者：周志丹[1] 徐磊华[1] 刘金龙[1] 

机构地区：[1]中国矿业大学材料科学与工程,江苏徐州221116

出　　处：《润滑与密封》2011年第9期51-54,共4页Lubrication Engineering

基　　金：973国家重点基础研究发展计划(2007CB607605)

摘　　要：利用分子自组装技术在羟基化后的单晶硅硅片表面制备(3-巯基丙基)三甲氧基硅烷(MPTS)自组装膜,用X射线光电子能谱仪(XPS)对薄膜的表面结构进行表征,用JGW-360a型接触角测量仪测量硅片表面的接触角,用UMT-200型微观摩擦磨损实验机测量硅片的摩擦因数,探讨沉积时间对自组装膜的摩擦学性能的影响。结果表明:MPTS自组装膜具有亲水疏水性能,其对水的接触角超过60°;硅片表面沉积MPTS可以大幅度降低硅片的摩擦因数,使硅基片表面的摩擦因数由无膜时的0.6降至0.25左右,且具有很好的耐磨性;沉积时间对硅表面自组装膜的摩擦学性能影响较大,在本实验条件下,0.5 h沉积时间所制备的MPTS-SAM硅片的耐磨性最佳,1 h沉积时间制得的硅片表面最为光滑。Self-assembled monolayer （ SAM ） of （ 3-Mercaptopropyl ） trimethoxysilane （ MPTS ） was fabricated on silicon surface by molecular self-assembly process. The surface configuration of monolayer was analyzed using X-ray photoelectron spectrometry, and the contact angle was estimated by JGW-36Da test system. The tribological properties of the as-prepared thin films were estimated by UMT-2. The test results show that MPTS SAM is hydrophobic and the water contact angle is more than 60~, and the monolayer prepared on silicon surface can reduce the friction coefficient and increase antiwear per- formance of the substrate. The sedimentary time influences the tribological properties.

关 键 词：MPTS 沉积时间 XPS 接触角 摩擦因数 自组装膜 

分 类 号：O647.9[理学—物理化学]