title: Tunable transition from hydration to monomer-supported lubrication in zwitterionic monolayers revealed by molecular dynamics simulation.
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.
authors: Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA. peter.cummings@vanderbilt.edu.
authors: Christoph
authors: C
authors: Klein
authors: Christopher R
authors: CR
authors: Iacovella
authors: Clare
authors: C
authors: McCabe
authors: Peter T
authors: PT
authors: Cummings
mesh_terms: D008689:Methacrylates / Q000737:chemistry*; D056004:Molecular Dynamics Simulation; D010767:Phosphorylcholine / Q000031:analogs & derivatives* / Q000737:chemistry; D012821:Silanes / Q000737:chemistry*
chemical_list: D008689:Methacrylates; D012821:Silanes; D010767:Phosphorylcholine; C070638:2-methacryloyloxyethyl phosphorylcholine