Boundary lubricants with exceptionally low friction coefficients based on 2D close-packed phosphatidylcholine liposomes

Ronit Goldberg; Avi Schroeder; Gilad Silbert; Keren Turjeman; Yechezkel Barenholz; Jacob Klein

doi:10.1002/adma.201101053

Boundary lubricants with exceptionally low friction coefficients based on 2D close-packed phosphatidylcholine liposomes

Ronit Goldberg, Avi Schroeder, Gilad Silbert, Keren Turjeman, Yechezkel Barenholz, Jacob Klein^*

^*Corresponding author for this work

Department of Biochemistry and Molecular Biology

Research output: Contribution to journal › Article › peer-review

149 Scopus citations

Abstract

Liposomes of hydrogenated soy phosphatidylcholine (PC) lipids spontaneously self-assemble in close-packed layers on solid surfaces to form boundary lubricants that reduce the coefficient μ of sliding friction between them down to μ ≈ 10 ^-4 - 2 × 10 ^-5, at pressures up to ca. 12 MPa. This strikingly low value is attributed to hydration-lubrication by the PC headgroups exposed at the surfaces of the gel-phase vesicles.

Original language	English
Pages (from-to)	3517-3521
Number of pages	5
Journal	Advanced Materials
Volume	23
Issue number	31
DOIs	https://doi.org/10.1002/adma.201101053
State	Published - 16 Aug 2011

Keywords

hydration
lipids
liposomes
lubrication
surface forces

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10.1002/adma.201101053

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abstract = "Liposomes of hydrogenated soy phosphatidylcholine (PC) lipids spontaneously self-assemble in close-packed layers on solid surfaces to form boundary lubricants that reduce the coefficient μ of sliding friction between them down to μ ≈ 10 -4 - 2 × 10 -5, at pressures up to ca. 12 MPa. This strikingly low value is attributed to hydration-lubrication by the PC headgroups exposed at the surfaces of the gel-phase vesicles.",

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AU - Schroeder, Avi

AU - Silbert, Gilad

AU - Turjeman, Keren

AU - Barenholz, Yechezkel

AU - Klein, Jacob

PY - 2011/8/16

Y1 - 2011/8/16

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AB - Liposomes of hydrogenated soy phosphatidylcholine (PC) lipids spontaneously self-assemble in close-packed layers on solid surfaces to form boundary lubricants that reduce the coefficient μ of sliding friction between them down to μ ≈ 10 -4 - 2 × 10 -5, at pressures up to ca. 12 MPa. This strikingly low value is attributed to hydration-lubrication by the PC headgroups exposed at the surfaces of the gel-phase vesicles.

KW - hydration

KW - lipids

KW - liposomes

KW - lubrication

KW - surface forces

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Boundary lubricants with exceptionally low friction coefficients based on 2D close-packed phosphatidylcholine liposomes

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Keywords

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