Journal
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
Volume 25, Issue 6-7, Pages 761-779Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1163/016942410X525993
Keywords
Surface spreading; ink-jet paper; hydrodynamic model; molecular-kinetic model
Funding
- UPM-Kymmene Ltd
- Academy of Finland through the Center of Excellence for Functional Materials (FunMat)
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The dynamic surface wetting kinetics of sessile water and ethylene glycol droplets deposited on ink-jet papers was studied. The hydrodynamic and molecular-kinetic models were used for data analysis and the results were compared with each other. Hoffman-Tanner plots gave good linear fits with experimental data, but only the low velocity linear data fit correlated well with experimentally determined pseudo-equilibrium contact angles. The molecular-kinetic model gave a good non-linear fit with experimental data and produced physically meaningful values for the molecular parameters. A high rate wetting phase was found for some liquid-paper sample systems, which was correlated to capillary flow in 'micro-crack' surface structures. Deviation in low rate wetting behaviour from the hydrodynamic and molecular-kinetic models cannot solely be explained by surface structure and roughness. Consequently, it can be assumed that surface chemistry has a significant effect on wetting dynamics. (C) Koninklijke Brill NV, Leiden, 2011
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