Title: Comparison of contact angles calculated from the diameter of sessile drops and submerged air bubbles in contact with a solid surface
Abstract: A method for the determination of solid surface wettability involving diameter measurements of sessile water drops and calculation of advancing contact angles was developed earlier. This method has now been modified to include receding contact angle calculations, based on diameter measurements of the contact area of submerged air bubbles in contact with solid surfaces. We found differences between the values of the contact angles calculated from water drop diameters in air and from the contact area of air bubbles with a solid surface in water. An adsorbed layer of a biopolymer, e.g. a protein, caused, however, much larger differences between the contact angles measured with the two techniques. The bubble contact angle technique allows measurements on polymer surfaces without drying and in the aqueous phase which is analogous to many biological systems of interest.
Publication Year: 1986
Publication Date: 1986-03-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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