Tunable transition from hydration to monomer-supported lubrication in zwitterionic monolayers revealed by molecular dynamics simulation

Christoph Klein, Christopher R. Iacovella, Clare McCabe, Peter T. Cummings*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The tribology of 2-methacryloyloxyethyl phosphorylcholine monolayers in water is studied using molecular dynamics simulations. Our results show two distinct shear regimes where the first is dominated by hydration lubrication, exhibiting near zero friction coefficients, and the second by chain-chain interactions, resembling monomer-supported lubrication. These results provide insight into the hydration lubrication mechanism - a phenomena thought to underlie the extremely efficient lubrication provided by surfaces functionalized with polyzwitterionic polymer brushes and the mammalian synovial joint.

Original languageEnglish
Pages (from-to)3340-3346
Number of pages7
JournalSoft Matter
Volume11
Issue number17
DOIs
Publication statusPublished - 7 May 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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