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Influence of Volume Drop on Surface Free Energy of Glass

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Rymuszka D., Terpiłowski K., Hołysz L.
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EN
The aim of the research was to determine how the drop size affects the contact angle values and determine its optimal size for further contact angle measurements and comparison of the contact angle values measured for three probe liquids (water, formamide, diiodomethane) on the glass surface using the: sessile drop and tilting plate methods. Next, using the measured contact angles, the total surface free energy and its components were determined from the van Oss et al. (Lifshitz-van der Waals acid- base component, LWAB), Owens-Wendt, Neumann and contact angle hysteresis (CAH) approaches. The studies showed, that drop size is very important for contact angle measurements and consequently, for surface free energy estimation.
2

Changes in surface properties of polymethylmethacrylate (PMMA) treated with air plasma

100%
Rymuszka D., Terpiłowski K., Hołysz L., Chibowski E.
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
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2015
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vol. 70
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issue 1
EN
Artykuł nie zawiera abstraktu.
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Comparison of contact angle measurement methods of liquids on metal alloys

100%
Terpiłowski K., Hołysz L., Rymuszka D., Banach R.
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
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2016
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vol. 71
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issue 1
EN
The paper presents the studies of metal wettability using two methods: the sessile droplet and immersion ones. Based on the measured contact angles, there was calculated apparent surface free energy from the acidic–basic approach and the contact angle hysteresis. The advancing contact angles measured using the immersion method exhibit a little higher values than those measured by the sessile droplet method. The application of the immersion method leads to obtaining higher contact angle hysteresis. Both methods give different values of contact angles but they can be applied independently for estimation of metal surface wettability.
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