Adsorption and wetting

Dekany, I. and Nagy, L. G. Immersional wetting and adsorption displacement on hydrophilic/hydrophobic surfaces.. Colloid Interface Sci. 147(1) 119—28, 1991. 

HUA Huang, Y. and Forciniti, D., Ethylene oxide and propylene oxide random copolymer/sodium chloride aqueous two-phase systems Wetting and adsorption on dodecylagarose and polystyrene, Biotechnol. Bioeng., 77, 786, 2002. 

Welding processes are of two main types thermal and solvent. By careful application of heat or solvent to a thermoplastic substrate, one may liquefy the surface resin and use it to form the bond. The bond strength is determined by diffusion of polymer from one snr-face into another instead of by the wetting and adsorption of an adhesive layer. It is possible to weld plastics of different types. However, for both thermal and solvent welding, the success of the process will be heavily determined by the compatibility of the polymers being joined. 

The incipient wetness and adsorption drying allow to narrow the particle size distribution (see Fig. 1). Most probably, this results from a very fast water removal from the porous space. 

An example of a series of evacuation, wetting and adsorptions/desorptions from solution is shown in Figure 2 for an active carbon immersed in n-heptane and n—butanol solutions. 

Recent contributions of the French school on diffusion, wetting, and adsorption have certainly made some impact in the field of adhesion. However, the entire field is still wide open for new ideas to germinate. 

Wetting and adsorption on chemically structured substrates can be analyzed macroscopically in terms of Cassie s and Wenzel s rules. " They introduce position-dependent contact angles 0 (R) and respectively. In the case of a chemically inhomogeneous... 

Planar but chemically inhomogeneous substrates are encountered in various practical application, in particular those related to open nanofluidics. One tries to understand the wetting and adsorption properties of such systems in terms of the wetting properties of separate, chemically homogeneous regions. A simple chemical step consists of two semi-infinite planes, each composed of a different material, say, (1) for x < 0 and (2) for... 

In this chapter we have proposed a unified thermodynamic approach to the analysis of melting/freezrng phenomena in confined systems. The approach is based on the Clausius-Clapeyron relations for coexistence of solid and liquid phases jointly with equations relating the vapor pressures above bulk (with plane interfaces) and confined states of a substance. For illustration we have applied our analysis to three types of confinement plane interfaces, small particles and pores. The analysis for other types of confinement like free, wetting and adsorption films, emulsions, and so on is straightforward. Notably, the logic of derivation allows us to better understand the influence and physical content of the parameters involved in the key equations. 

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