Abstract
MEASUREMENTS of static contact angles for alcohol/water mixtures on pretreated copper surfaces are presented in Fig. 1. The results indicate that, for ethyl alcohol concentrations up to 8 per cent by weight, a constant contact angle of 72° is attained. Analogous behaviour has been, observed by Franke1 when measuring mutual diffusivities where a minimum value was reported at 10 per cent concentration. Hoffman et al.2 have shown a maximum value of the temperature coefficient of the surface tension of ethyl alcohol/water mixtures at 8 per cent weight.
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References
Franke, G., Ann. Physik, 5te Folge, 14, 675 (1932).
Hoffman, W., Schoeneck, H., and Wanniger, W., Z. Physik. Chemie., Neue Folge, 2, 56 (1957).
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PONTER, A., DAVIES, G. & THORNLEY, P. Anomalies in Contact Angle Behaviour for Ethyl Alcohol–Water Mixtures. Nature 209, 504–505 (1966). https://doi.org/10.1038/209504b0
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DOI: https://doi.org/10.1038/209504b0
