Wetting of Textured Surfaces

SOUD/UQVID BOUNDARY CONDITIONS AND WETTING OF TEXTURED SURFACES... 

Balashov, S. P, Imasheva, E. S., Govindjee, R., Ebrey, T. G. (1996). Titration of aspartate-85 in bacteriorhodopsin what it says about chromophore isomerization and proton release. Biophysical Journal, 70, 473 81. http //dx.doi.org/10.1016/S0006-3495(96)79591-7. Becker, W. G., Bard, A. J. (1983). Photoluminescence and photoindnced oxygen adsorption of colloidal zinc sulfide dispersions. The Journal of Physical Chemistry, 87,4888-4893. Bico, J., Thiele, U., Quere, D. (2002). Wetting of textured surfaces. Colloids and Surfaces A Physicochemical Engineering Aspects, 206, 41—46. 

Bico, J., Thiele, U., Queie, D. (2002). Wetting of textured surfaces. Colloids and Surfaces A Physicochemical Engineering Aspects, 206,41-46. 

Surface features. The surfaces of a few structured packings are smooth (e.g., Fig. 8.10a,g). Most structured packings have a roughened or enhanced surface that assists the lateral spread of liquid, promotes film turbulence, and enhances the area available for mass transfer. Laboratory measurements of absorption rates showed that both mass transfer efficiency and wetted area are enhanced by texturing metal surfaces (28). The extent to which mass transfer was improved varied with the type of texturing used. Texturing employed by... 

It is also important to have an understanding of the microstructure of the substrate, and of its surface texture. Thus preferential wetting of thermal grainboundary grooves (Figure 3.2) can distort the triple line (see Appendix H) and the... 

Workers concerned with liquid/solid systems with exceptionally good wettability, such as some braze/metal workpiece systems, find that the drops do not preserve a perfectly circular area of contact because of the sensitivity of the liquid to changes in capillary attraction caused by minor variations in the surface texture of the workpiece. Because of such irregularity, some workers have used the contact area of a small volume of braze as a measure of wettability. Thus Feduska used area measurements to differentiate between the wetting of different stainless steels by a wide range of metals and alloys (Feduska 1959). 

The surface of pavements with PA has very good macro-texture and a good anti-skidding coefficient, even if the surface is wet. What is more, because of its surface texture, driver glare by light beam reflection of vehicles on the pavement surface is reduced. 

The noise generated from moving vehicles on open-textured surfaces, similar to PA, has been found to be reduced when compared with conventional surfacing materials of the same macro-texture and skid resistance coefficient. The reduction measured was 3 to 4 dB(A), when the pavement surface was dry, and 7 to 8 dB(A), when the surface was wet (Nelson and Ross 1981). Similar results were also found by the Belgium Road Research Centre (Decoene 1989) and by Phillips et al. (1995). At a later study, resurfacing an old concrete pavement with PA led to wind-normalised reductions in noise exposure of the order of 4.5 to 6 dB(A) L/ io,i8h at villages approximately 0.5 km from the motorway (Baughan et al. 2002). 

I) Macroscopically, a textile has a coarse, textured surface, which may have similar effects on the wetting behavior of a sessile droplet as was discussed for the Wenzel or Cassie-Baxter cases. 

Despite their potential application, the wetting properties of aqueous surfactant solutions on superhydrophobic (SH) solid surfaces have been rarely investigated. In this work single surfactant solutions and binary mixtures of non-ionic and ionic surfactants have been studied in contact with textured and non-textured surface coatings obtained utilizing nanoparticles and a fluorinated polymer. 

Macroscopic droplets of oil (the less wetting phase) are contained within one or more interconnected pore bodies that are formed by solid phases of the porous medium. These immobilized portions of the oil phase, which can be referred to as ganglia or blobs, are surrounded with continuously connected reservoir brine (the more wetting phase). At the three-phase contact lines which are formed on the solid surfaces where the two immiscible liquids meet, the apparent contact angles reflect the relative affinities of the three phases for each other, surface textures, surface compositions, and solid surface saturation histories. 

The wetting of the boron nitride phases by molten metal mixtures containing Ag, Cu, Sn, Pb is not only affected by the BN phase (a, p, y) but also by the texture (e.g., the grain size) of the boron nitride samples. From 900°C the dense phases start to form a-BN and three-phase solid surfaces can be studied [42]. 

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