Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Contact angle Wenzel

Some clarification of this problem resulted after Wenzel [103] developed a relation between the macroscopic roughness of a solid surface and the contact angle. Wenzel discussed the roughness factor, r (defined as the ratio of the true area of the solid to the apparent area or envelope), and its relation to the apparent or measured contact angle, 0 , between the liquid and the envelope to the surface of the solid and to the true contact angle, 0, between the liquid and the surface at the air-liquid-solid contact boundary. He derived the well known relation... [Pg.5]

Wetting, Lotus effect, super-hydrophobicity, water repellence, contact angle, Wenzel equation, Cassie-Baxter equation, roU-off angle... [Pg.39]

Wentworth process, for ethanol separation from water, 8 834-835 Wenzel s equation, 22 111-112 Wenzel contact angle, 22 111 Werner nomenclature scheme, 17 391-392 Werner-Pfleiderer (WP) Compounder, 22 44 Werner-type inclusion compounds, 14 171-172... [Pg.1019]

Good, R.J, (1952). A thermodynamic derivation of Wenzel s modification of Young s equation contact angles Together with a theory of hysteresis. J. Am. Chem. Soc. 74, 5041-5042. [Pg.39]

The effect of roughness on the apparent contact angle of a solid surface has been given quantitative form by R. N. Wenzel.8 If r, the roughness factor , is the ratio between the real and the apparent area of the surface, then... [Pg.413]

Then, the Young contact angle is calculated combining equation (3.21) and the equation of Wenzel, yielding ... [Pg.137]

WolanskyG, Marmur A. (1999) Apparent contact angles on rough surfaces the wenzel equation revisited. Colloids Surf A 156 381-388. [Pg.54]

The effect of roughness on the wettability of an idealized sinusoidal surface has been studied with a digital computer. The equations of Wenzel and of Cassie and Baxter are discussed in relation to the model. The heights of the energy barriers between metastable states of a drop are seen to be of utmost importance in determining the magnitude of contact angle hysteresis. [Pg.112]

Maximum and minimum possible angles Most probable contact angles, 0 Lower. Calculated from Wenzel s equation Upper. Calculated from Cassie and Baxter s equation Possible curve of receding angles Possible curve of advancing angles... [Pg.132]

B. Most probable contact angles,, calculated from Wenzel s equation... [Pg.133]

Fig. 6. Effect of roughness on contact angle A, maximum and minimum angle B, Wenzel equation (lower) and Cassie and Baxter equation (upper) 6, and 6 possible receding and advancing angles (Ref. )... Fig. 6. Effect of roughness on contact angle A, maximum and minimum angle B, Wenzel equation (lower) and Cassie and Baxter equation (upper) 6, and 6 possible receding and advancing angles (Ref. )...
Surface Tension, Capillarity, and Contact Angle, Fig. 8 Effect of surface structures on wetting behavior, (a) Wenzel model where the liquid penetrates between the... [Pg.3144]

In the Wenzel model, the apparent contact angle 0w is obtained by correcting the Young s contact angle 0 with a roughness correction factor r... [Pg.3144]

See other pages where Contact angle Wenzel is mentioned: [Pg.29]    [Pg.74]    [Pg.74]    [Pg.75]    [Pg.72]    [Pg.78]    [Pg.79]    [Pg.80]    [Pg.80]    [Pg.80]    [Pg.195]    [Pg.28]    [Pg.30]    [Pg.35]    [Pg.38]    [Pg.137]    [Pg.409]    [Pg.52]    [Pg.183]    [Pg.7]    [Pg.326]    [Pg.326]    [Pg.6]    [Pg.112]    [Pg.127]    [Pg.131]    [Pg.156]    [Pg.287]    [Pg.108]    [Pg.108]    [Pg.105]    [Pg.84]    [Pg.186]    [Pg.761]    [Pg.2710]    [Pg.3144]    [Pg.3144]    [Pg.21]   
See also in sourсe #XX -- [ Pg.168 , Pg.308 , Pg.309 ]



SEARCH



Contact angle Wenzel state

© 2024 chempedia.info