Cd. Rugge et Rc. Ahlert, CONTACT-ANGLE HYSTERESIS IN CHLORINATED-HYDROCARBON WATER MIXTURES, Journal of physical chemistry, 97(34), 1993, pp. 8776-8779
Variations of two-phase capillary rise were conducted with water and a
number of chlorinated hydrocarbons in glass capillaries cleaned with
chromic-sulfuric acid. Contact angle hysteresis due to the advance or
recession of a water-organic interface was investigated, relative to t
he water phase. When water advanced, contact angles of 47.3-62.1-degre
es were calculated. When water receded, equations based on the balance
of interfacial and gravity forces within the capillary failed to yiel
d single estimates of the interfacial angle. It was hypothesized that
water-receding angles were approaching 0-degrees due to a film of wate
r. This hysteresis was minimized in the smallest capillaries.