Preparation and Tribological Properties of Multiply-alkylated Cyclopentane/(3-Aminopropyl)triethoxylsilane Double-layer Film on Silicon

Multiply-alkylated cyclopentanes film, (3-Aminopropyl)triethoxylsilane self-assembled monolayers and a double-layer lubricant film consisting of a multiply-alkylated cyclopentane mobile lubricant on (3-Aminopropyl)triethoxylsilane self-assembled monolayers (SAMs) were prepared. Contact angle, thickness, surface topography and friction properties of these films were investigated.The results indicated that the multiply-alkylated cyclopentane/(3-Aminopropyl)triethoxylsilane double-layer film exhibited low friction coefficient and extended durability ability compared with multiply-alkylated cyclopentane film and (3-Aminopropyl)triethoxylsilane SAMs at a normal load of 0.1 N and a sliding frequency of 1 Hz. And there was on obvious wear scar on the surface before the failure of the double-layer film. It is highly suggested that the mobile hydrocarbon MACs in the double-layer lubricant film was trapped and maintained among the APS-SAMs network and yield the best combination of tribological properties.