Cited by 103Adhesion, Friction, and Surface InteractionsPolymer Surface Interaction StudiesForce Microscopy Techniques and Applications

Shear and Frictional Interactions between Adsorbed Polymer Layers in a Good Solvent

Raviv, Uri, Tadmor, Rafael, Klein, Jacob·2001·The Journal of Physical Chemistry B

Abstract

The forces between layers of poly(ethylene oxide) (PEO), of molecular weights M = 37 × 10 3 (PEO37) and M = 112 × 10 3 (PEO112) adsorbed onto smooth, curved solid (mica) surfaces across the good solvent toluene have been determined using a surface force balance (SFB). The SFB used is capable of measuring both normal interactions F n ( D ) as a function of surface separation D and, with extreme sensitivity, shear or frictional forces F s ( D, v s ) between them as they slide past each other at velocity v s . The F n ( D ) profiles are closely similar to those measured in earlier studies between adsorbed PEO layers. The shear or frictional forces between the sliding PEO-bearing surfaces are very low up to moderate compressions of the adsorbed layers (local pressures up to ca. 10 5 N m -2 ), corresponding to effective friction coefficients μ eff = ( F s / F n ) of order 0.003 or less. This is attributed to the fluid interfacial layer between the adsorbed layers resulting from their weak mutual interpenetration. At higher loads F s increases markedly, and two forms of behavior are found depending on the PEO molecular weight. For PEO37, a sharp increase in F s is followed by removal of polymer from within the intersurface gap during sliding, high friction, and adhesion between the surfaces. For the longer PEO112, the initial increase in F s and in μ eff saturates at the highest loads (for the case of μ eff even decreasing), indicating that the slip plane has moved from the polymer/polymer midplane to the polymer/solid interface. The dependence of F s on the sliding velocity in the high-friction regime is weak, suggesting that at low compressions there is a thinning of the mutual adsorbed-layer-interpenetration region at high v s that offsets the higher viscous dissipation in that region. At the highest loads, when the slip plane has shifted to the mica surface, the weak F s ( v s ) dependence is characteristic of sliding friction at solid substrates.

Integrity signals

Registry

Crossref · 10.1021/jp0041860

Cites

41 of 41 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Bridging occurs when a chain from one adsorbed layer adsorbs to the opposing surface; sliding drags bridging chains, leading to energy dissipation and higher friction.

    “Such bridging occurs when a chain from one adsorbed layer adsorbs also to the opposing surface: When the surfaces slide past each other, the bridging chains are dragged past the surfaces onto which they are adsorbed, leading to energy dissipation and thus to higher friction [30, 77, 78].”

    From Hydration lubrication (2013) · cites this paper as [30]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Raviv, U., Tadmor, R., & Klein, J.
Affiliations
Weizmann Institute of Science (IL)
Venue
The Journal of Physical Chemistry B
Published
2001-08-01
Volume
105
Issue
34
Pages
8125-8134
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W2079681497
Cited by
103
References
41
Citations by year
2026: 2 · 2025: 3 · 2024: 5 · 2023: 1 · 2022: 1 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 5 · 2016: 4 · 2015: 9 · 2014: 3 · 2013: 4 · 2012: 4
FWCI
14.48
Type
journal article
Language
en
Open access
closed
Locations
The Journal of Physical Chemistry B (publishedVersion)
Topics
  • Physical Sciences › Engineering › Mechanics of Materials › Adhesion, Friction, and Surface Interactions
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Polymer Surface Interaction Studies
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Force Microscopy Techniques and Applications
Keywords
poly(ethylene oxide), adsorbed polymer layers, shear force, friction, good solvent, toluene, mica, interlayer interaction, effective friction coefficient, slip planes, molecular weight effects, sliding velocity, adhesion, surface force balance

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review