Design of dual hydrophobic–hydrophilic polymer networks for highly lubricious polyether-urethane coatings

Peter T.M. Albers, Stefan P.W. Govers, Jozua Laven, Leendert G.J. van der Ven, Rolf A.T.M. van Benthem, Gijsbertus de With (Corresponding author), A. Catarina C. Esteves (Corresponding author)

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Bio-lubricated surfaces found in nature have inspired the design of low friction polymer coatings for biomedical
applications. This work presents a systematic study of the relation between the network structure parameters
and the macroscopic friction properties of highly lubricious dual hydrophobic/hydrophilic polyurethane (PU)
coatings in an aqueous environment. Chemically cross-linked PU coatings were prepared by adding poly(ethylene
glycol) mono-methyl ether (mPEG) as hydrophilic dangling chains, or poly(ethylene glycol) (PEG)-diol as
hydrophilic elastically active network chains, to poly(propylene glycol) (PPG)-PU coating formulations. The
friction behaviour of the water swollen coatings was measured using a custom-made water immersed tribology
setup. Addition of the PEG segments or mPEG dangling chains to hydrophobic PPG coatings greatly enhances the
lubricious properties of the coatings. These dual hydrophobic/hydrophilic diol PU network exhibit a surface with
a lower coefficient of friction compared to reference coatings from either individual precursors, demonstrating a
large synergistic effect between the hydrophobic PPG and the hydrophilic PEG in the coatings. Based on network
structure and surface chain considerations it is hypothesized that the existence of a thin and softer hydrated
surface layer on top of a less hydrated, more rigid, coating bulk layer gives rise to the observed enhanced
lubricious properties, hereby mimicking to some extent bio-lubricated systems, such as cartilage.
Originele taal-2Engels
Pagina's (van-tot)82-94
Aantal pagina's13
TijdschriftEuropean Polymer Journal
Volume111
DOI's
StatusGepubliceerd - 1 feb 2019

Vingerafdruk

urethanes
Polyethers
Polymers
coatings
Coatings
Propylene Glycol
polymers
glycols
Glycols
propylene
Polyurethanes
Propylene
Polyethylene glycols
Friction
friction
polyetherurethane
Active networks
Methyl Ethers
cartilage
Ethylene Glycol

Citeer dit

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title = "Design of dual hydrophobic–hydrophilic polymer networks for highly lubricious polyether-urethane coatings",
abstract = "Bio-lubricated surfaces found in nature have inspired the design of low friction polymer coatings for biomedicalapplications. This work presents a systematic study of the relation between the network structure parametersand the macroscopic friction properties of highly lubricious dual hydrophobic/hydrophilic polyurethane (PU)coatings in an aqueous environment. Chemically cross-linked PU coatings were prepared by adding poly(ethyleneglycol) mono-methyl ether (mPEG) as hydrophilic dangling chains, or poly(ethylene glycol) (PEG)-diol ashydrophilic elastically active network chains, to poly(propylene glycol) (PPG)-PU coating formulations. Thefriction behaviour of the water swollen coatings was measured using a custom-made water immersed tribologysetup. Addition of the PEG segments or mPEG dangling chains to hydrophobic PPG coatings greatly enhances thelubricious properties of the coatings. These dual hydrophobic/hydrophilic diol PU network exhibit a surface witha lower coefficient of friction compared to reference coatings from either individual precursors, demonstrating alarge synergistic effect between the hydrophobic PPG and the hydrophilic PEG in the coatings. Based on networkstructure and surface chain considerations it is hypothesized that the existence of a thin and softer hydratedsurface layer on top of a less hydrated, more rigid, coating bulk layer gives rise to the observed enhancedlubricious properties, hereby mimicking to some extent bio-lubricated systems, such as cartilage.",
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author = "Albers, {Peter T.M.} and Govers, {Stefan P.W.} and Jozua Laven and {van der Ven}, {Leendert G.J.} and {van Benthem}, {Rolf A.T.M.} and {de With}, Gijsbertus and Esteves, {A. Catarina C.}",
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AU - Albers, Peter T.M.

AU - Govers, Stefan P.W.

AU - Laven, Jozua

AU - van der Ven, Leendert G.J.

AU - van Benthem, Rolf A.T.M.

AU - de With, Gijsbertus

AU - Esteves, A. Catarina C.

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AB - Bio-lubricated surfaces found in nature have inspired the design of low friction polymer coatings for biomedicalapplications. This work presents a systematic study of the relation between the network structure parametersand the macroscopic friction properties of highly lubricious dual hydrophobic/hydrophilic polyurethane (PU)coatings in an aqueous environment. Chemically cross-linked PU coatings were prepared by adding poly(ethyleneglycol) mono-methyl ether (mPEG) as hydrophilic dangling chains, or poly(ethylene glycol) (PEG)-diol ashydrophilic elastically active network chains, to poly(propylene glycol) (PPG)-PU coating formulations. Thefriction behaviour of the water swollen coatings was measured using a custom-made water immersed tribologysetup. Addition of the PEG segments or mPEG dangling chains to hydrophobic PPG coatings greatly enhances thelubricious properties of the coatings. These dual hydrophobic/hydrophilic diol PU network exhibit a surface witha lower coefficient of friction compared to reference coatings from either individual precursors, demonstrating alarge synergistic effect between the hydrophobic PPG and the hydrophilic PEG in the coatings. Based on networkstructure and surface chain considerations it is hypothesized that the existence of a thin and softer hydratedsurface layer on top of a less hydrated, more rigid, coating bulk layer gives rise to the observed enhancedlubricious properties, hereby mimicking to some extent bio-lubricated systems, such as cartilage.

KW - Aqueous lubrication

KW - Dual hydrophobic/hydrophilic

KW - Hydrophilic coating

KW - Lubricious polymer coating

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