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Application of the JKR method to the measurement of adhesion to Langmuir-Blodgett cellulose surfaces
KTH, Superseded Departments, Chemistry.
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2000 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 230, no 2, 441-447 p.Article in journal (Refereed) Published
Abstract [en]

The JKR method has been applied for studying adhesion between poly(dimethylsiloxane) (PDMS) caps and Langmuir-Blodgett cellulose surfaces including the substrate, hydrophobized mica, and two flat mineral surfaces, bare mica and glass, The self-adhesion of PDMS caps and oxidized PDMS caps are included as a reference to compare with literature data. The results of the measurements have been compared with previous studies using the surface force apparatus and similar systems. A satisfactory agreement is obtained for simple systems showing no, or very limited, hysteresis between loading and unloading curves, In several cases, however, a large hysteresis is found between loading and unloading curves, with a larger adhesion measured from the pull-off force than from the JKR-curve determined on loading. This is, for instance, the case for PDMS against cellulose. The situation is analogous to that found in wetting studies showing a large hysteresis between advancing and receding contact angles.

Place, publisher, year, edition, pages
2000. Vol. 230, no 2, 441-447 p.
Keyword [en]
JKR method, adhesion, cellulose, PDMS, adhesion hysteresis, contact-angle hysteresis, silicone-rubber, films, polymers, deformation, dynamics, forces, solids
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-20126DOI: 10.1006/jcis.2000.7108ISI: 000090070000025OAI: oai:DiVA.org:kth-20126DiVA: diva2:338819
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2010-08-31Bibliographically approved

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Wågberg, Lars

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