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.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
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
