Wettability of glass

Surface modification reactions are used to improve the wettability of glass surfaces by polar stationary phases and to Improve the extent of deactivation by sllylation" [138-146,166]. Miaaiuua procedures have been investigated but only a few are in use. Of these, the most important reactions are etching by hydrogen chloride, leaching with aqueous hydrochloric acid, formation of whiskers and solution deposition of a layer of solid particles. Because of the high purity and thinness of the... 

The protein binding to substrate via hydrogen bonding or via hydro-phobic bonding has been discussed by Vroman (26, 27). In his study on the effect of protein adsorption on the wettability of a surface, he noted that adsorption decreased the wettability of glass but increased the wettability of Lucite. This difference in the behavior is dependent... 

Poor wettability of glass columns was a major obstacle to the reliable column technology in the past. With the advent of surface corrosion techniques [11,97,98], it has become feasible to coat uniform stationary films of even polar liquids on the inner column surface. Similarly, coated dispersions of solids [99] can aid in a uniform distribution of the stationary liquids for efficient separations. 

Surface modification reactions used to improve the wettability of glasses by the stationary phase and to deionize some glasses, result in an increase in the activity of the glass surface. Without subsequent deactivation, colunms coated with nonpolar and moderately polar stationary phases exhibit undesirable chromatographic properties, such as tailing, incomplete elution of polar solutes and in extreme cases, sample... 

Fig. 5. Wettability of glass fibers in water and epoxy as a function of silane concentration in solution.

Mount, G. J. (1989). The wettability of bonding resins used in the composite resin/glass-ionomer sandwich technique. Australian Dental Journal, 34,... 

Dirt can also be removed chemically by washing the ware with a chromium mixture. This ensures good wettability of the glass. After washing the ware, pour the chromium mixture back into its bottle (but not into a sink), thoroughly wash the ware with tap water. 

Wettability of Elastomers and Copolymers. The wettability of elastomers (37, 38) in terms of critical surface tension was reported previously. The elastomers commonly used for the reinforcement of brittle polymers are polybutadiene, styrene-butadiene random and block copolymers, and butadiene-acrylonitrile rubber. Critical surface tensions for several typical elastomers are 31 dyne/cm. for "Diene rubber, 33 dyne/cm. for both GR-S1006 rubber and styrene-butadiene block copolymer (25 75) and 37 dyne/cm. for butadiene-acrylonitrile rubber, ( Paracril BJLT nitrile rubber). The copolymerization of butadiene with a relatively polar monomer—e.g., styrene or acrylonitrile—generally results in an increase in critical surface tension. The increase in polarity is also reflected in the increase in the solubility parameter (34,39, 40) and in the increase of glass temperature (40). We also noted a similar increase in critical surface tensions of styrene-acrylonitrile copolymers with the... 

This allows us to derive the wettability simply from 8 and the surface tension of the liquid. This method was used for instance by Whalen and Lai (1977) in their systematic study of the wetting of modified surfaces of glass. 

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