Abstract Molecular dynamic simulations based on a coarse-grained, bead-spring model are adopted to investigate the spreading of both nonfunctional and functional perfluoropolyether (PFPE) on solid substrates. For nonfunctional PFPE, the spreading generally exhibits a smooth profile with a precursor film. The spreading profiles on different substrates are compared, which indicate that the bead-substrate interaction has a significant effect on the spreading behaviour, especially on the formation of the precursor film. For functional PFPE, the spreading generally exhibits a complicated terraced profile. The spreading profiles with different endbeads are compared, which indicate that the endbead-substrate interaction and the endbead--endbead interaction, especially the latter, have a significant effect on the spreading behaviour.
Received: 24 November 2005
Revised: 26 December 2005
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 50390060) and the State Key Development Program for Basic Research of China (Grant No 2003CB716201).
Cite this article:
Li Xin (李欣), Hu Yuan-Zhong (胡元中), Wang Hui (王慧), Yang Dong (杨冬) Molecular dynamic simulation of lubricant spreading: effect from the substrate and endbead 2006 Chinese Physics 15 818
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