title: Wear Protection without Surface Modification Using a Synergistic Mixture of Molecular Brushes and Linear Polymers.
abstract: We describe the design of lubricating and wear protecting fluids based on mixtures of bottle-brushes (BB) and linear polymer solutions. To illustrate this concept, we used hyaluronic acid (HA), a naturally occurring linear polyelectrolyte, and a water-soluble synthetic BB polymer. Individually, these two polymers exhibit poor wear protecting capabilities compared to that of saline solutions. Mixture of the two polymers in pure water or in saline allows the wear protection of surfaces over a wide range of shearing conditions to drastically increase. We demonstrate that this synergy between the BB and HA polymers emerges from a strong cohesion between the two components forming the boundary film due to entanglements between both polymers. We show that this concept can be applied to other types of linear polymers and surfaces and is independent of the chemical and mechanical properties of the surfaces.
authors.affiliation: Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal , Montréal, QC H3T 1J4, Canada.|Université de Lyon, Université Claude Bernard Lyon 1 , CNRS, Ingénierie des Matériaux Polymères (IMP-UMR 5223), 15 Boulevard Latarjet, 69622 Cedex Villeurbanne, France.
authors.forename: Jimmy
authors.initials: J
authors.lastname: Faivre
authors.affiliation: Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal , Montréal, QC H3T 1J4, Canada.
authors.forename: Buddha R
authors.initials: BR
authors.lastname: Shrestha
authors.affiliation: Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States.
authors.forename: Joanna
authors.initials: J
authors.lastname: Burdynska
authors.affiliation: Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States.
authors.forename: Guojun
authors.initials: G
authors.lastname: Xie
authors.affiliation: Department of Stomatology, Faculty of Dentistry, CHU Sainte Justine Research Center , Montréal QC H3T 1C5, Canada.
authors.forename: Florina
authors.initials: F
authors.lastname: Moldovan
authors.affiliation: Université de Lyon, Université Claude Bernard Lyon 1 , CNRS, Ingénierie des Matériaux Polymères (IMP-UMR 5223), 15 Boulevard Latarjet, 69622 Cedex Villeurbanne, France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Delair
authors.affiliation: Laboratoire de Tribologie et Dynamique des Systèmes, UMR 5513 CNRS, Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, 69134 Cedex Ecully, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Benayoun
authors.affiliation: Université de Lyon, Université Claude Bernard Lyon 1 , CNRS, Ingénierie des Matériaux Polymères (IMP-UMR 5223), 15 Boulevard Latarjet, 69622 Cedex Villeurbanne, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: David
authors.affiliation: Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University , Pittsburgh, Pennsylvania 15213, United States.
authors.forename: Krzysztof
authors.identifier: 0000-0003-1960-3402
authors.initials: K
authors.lastname: Matyjaszewski
authors.affiliation: Canadian Research Chair in Bioinspired Materials, Faculty of Pharmacy, Université de Montréal , Montréal, QC H3T 1J4, Canada.
authors.forename: Xavier
authors.identifier: 0000-0002-3342-3179
authors.initials: X
authors.lastname: Banquy
keywords: biolubrication; bottle-brush polymer; hyaluronic acid; surface forces; wear resistance