CUI Baofeng1,2, ZHOU Huidi1, ZHANG Junyan1*, CHEN Jianmin1
(1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China 2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China)
Abstract: Composite self-assembled monolayers (SAMs) of poly (amide amine) generation 4.0 (PAMAM) and fatty acid on silicon were prepared. SAMs were characterized by ellipsometry, X-ray photoelectron spectroscopy and atomic force microscopy. The nano-tribological properties and micro-tribological properties were tested. Results showed that fatty acids (C18 and C12) were inserted successfully to the blank of PAMAM molecule in PAMAM SAMs. As a result, the friction force and friction coefficients of composite SAMs were decreased while the load-carrying capacity of the composite films was increased. The difference in molecular length of C18 and C12 fatty acids did not produce obvious difference in friction coefficients and load-carrying capacity
Key words: PAMAM; stearic acid; SAMs; AFM; LFM;
E-mail: chenjm@licp.cas.cn
Tribology, Vol. 31, Issue 1, 2011, 1~6
