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
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
