Application of the JKR Method to the Measurement of Adhesion to Langmuir-Blodgett Cellulose Surfaces |
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| Authors: | Rundlöf Karlsson Wågberg Poptoshev Rutland Claesson |
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| Affiliation: | a SCA Graphic Research AB, P.O. Box 716, Sundsvall, SE-851 21, Sweden;b PRV, P.O. Box 5055, Stockholm, SE-102 42, Sweden;c Mid Sweden University, Sundsvall, SE-851 70, Sweden;d Department of Chemistry, Surface Chemistry, Royal Institute of Technology, Stockholm, SE-100 44, Sweden;e Institute of Surface Chemistry, P.O. Box 5607, Stockholm, SE-114 86, Sweden |
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| Abstract: | 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. |
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| Keywords: | Abbreviations: JKR methodAbbreviations: adhesionAbbreviations: celluloseAbbreviations: PDMSAbbreviations: adhesion hysteresis |
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