长链羧酸单分子层膜的制备和性能  

PREPARATION AND TRIBOLOGY STUDIES OF ALKYL CARBOXYLIC ACID MONOLAYER FILMS ON PEI-COATED GLASS SUBSTRATE

作　　者：任嗣利[1] 杨生荣[1] 王博[1] 赵亚溥[2] 刘维民[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室 [2]中国科学院力学研究所非线性力学国家重点实验室

出　　处：《材料研究学报》2002年第1期46-50,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金重点资助项目50023001

摘　　要：首次在涂敷ＰＥＩ的玻璃表面上制备了癸酸及全氟癸酸的单分子层膜，研究了成膜机理及摩擦特性．结果表明，脱水剂ＤＣＣＤ促进了癸酸或全氟癸酸与ＰＥＩ酰胺化的反应，导致两种羧酸在ＰＥＩ表面产生了靠化学键（酰胺键）连接的稳定的单分子层膜，摩擦、磨损实验表明，单分子层有机膜的摩擦特性受膜的组成、表面能及有序性和堆积密度的重要影响．表面能越低，有序性和堆积密度越高，摩擦系数越低，与碳氢化合物相比，碳氟化合物形成的有序膜具有更高的强度和抗磨性能．Monolayer film of n-Alkanoic acid expected to be an excellent lubricant for micromachines was successfully prepared on PEI-coated glass substrate. The results of Contact-angle measurement and X-ray photoelectron spectroscopy (XPS) show that n-Alkanoic acid chemically attaches to the functional surface of PEI coatings. As a result, steady monolayer film of n-Alkanoic acid is prepared in the presence of a covalent amide bond between carboxylic group in n-Alkanoic acid and the primary or secondary amine groups in PEI. The lower surface energy generates lower friction forces and well-ordered and high packing densities of organic films correspond to excellent properties of tribology.

关 键 词：长链羧酸 单分子层膜 制备 性能 摩擦特性 脂肪酸 聚乙烯亚胺 成膜机理 结构 

分 类 号：O484[理学—固体物理]