Contact angle and film jumps

Abstract

The disjoining pressure 4.3 Indirect methods of calculating 9 4.3.1 Critical surface tension 4.3.2 Calculation from the work of adhesion 4.3.3 Calculation from adsorption isotherms 4.4 Contact angles on polystyrene 4.5 Contact angle glass-water 4.6 Contact angle glass-toluene/hexane 4.6.1 Introduction 4.6.2 Critical surface tension of glass 4.6.3 Autophobic liquids 4.6.4 Impurities 4.6.5 Calculation of 6 4.6.6 Non-duplex films 4.7 Possible mechanisms causing lib behaviour 4.7.1 Introduction 4.7.2 Increasing liquid surface tension 4.7.3 Decrease of effective meniscus circumference 4.8 Decreasing contact angles 100 4.8.1 General remarks 100 4.8.2 Liquid penetrates solid or film 101 4.8.3 Dissolving surface 4.8.4 De-or replacement of adsorbed films 4.8.5 Evaporation from the film 4.8.6 Film jumps 4.9 Interpretation lib behaviour 4.9.1 General remarks 4.9.2 Polystyrene 4.9.3 Glass-water 4.9.4 Glass -apolar liquids 4.10 Concluding remarks 104 5 CONCAVE AND ANTICLASTIC MENISCI 107 5

Mesoporous adsorbent for competitive adsorption of fluoride ions in zinc sulfate solution

“…Furthermore, the isotherm showed a trend almost perpendicular to the X axis in the dilute solution area, which should be attributed to capillary action appearing from the initial stage of adsorption. 35,36 …”

Capillary rise in porous media

“…This fact explains why it is reported [89,293] that different liquids give, in a suction experiment with the same porous medium, different results for C (u), where C = pgY/YCOsO, but also [292] that different liquids give the same C'(u). (It should be noted that there IS no a priori reason that C is not a function of 9 [294] . )…”

“…Apart from the validity of eq (1.33) and the presence of a saturation gradient, it is also mentioned whether the correct permeability was observed (correct = correct order of magnitude). This IS included because, when only three or four observations Porhaev [84] Koida [145] Tanaeva [135] Kuz'min [146] Smith [303] Schindler [304] McLaughlin [305] Luikov [132] Sommer [176] Braslavskii [171] Cammerer [172] Heizmann [72] Pun [36] Krawkow [306] Bell [81] Attenberg [307] Wadsworth [308] Peck [309] Youngs [109] laboratory [294,310] have been made during one experiment, it is dangerous to draw a conclusion concerning the linearity of dh/dt -\/h. For systems such as sand and glass beads, the value of fe, as a function of the particle size, is firmly established.…”

“…However, it should be noted that there is an important difference between the eq (1.33) problem and the saturation gradient problem. The first is due to other transport phenomena being rate determining (which may also happen in cylindrical capillaries) while the second is a direct consequence of the mechanism of capillary rise [294] . The reason that all models fail in describing the mechanism of capillary rise is twofold.…”