Wetting capacity

Resin type and nominal percent cross-linkage Minimum wet capacity, mequiv mL Density (nominal), g mL Comments... 

Wetting capacity The amount or volume of water a chemical can hold. 

The contact between a liquid catalyst and a soot particle is schematically drawn in Figure lb. Because of the wetting capacity of the liquid catalyst, the contact area between soot and catalyst can be significantly higher than in the case with solid catalysts. 

A typical cation-exchange resin of the sulfonated styrene-divinylbenzene (DVB) type, such as Dowex 50, has an exchangeable ion capacity of 5.0 meq/g of dry resin. As shipped, the water-wet resin might contain 41.4 wt% water. Thus, the wet capacity is 2.9 meq/g of wet resin. If the bulk density of a drained bed of wet resin is 0.83 g/cm3, the bed capacity is 2.4 eq/L of resin bed (Seader and Henley, 2006). 

In Table 9.9-1 both the dry and the wet capacity for some ion exchange resins are given. As can be seen there are no dramatic differences of the capacities dry for strongly or weakly acidic cation resins on the one hand and strongly or weakly basic anion resins on the other hand. The exact capacity is a function of maity parameters (cross-linking, homogeneous gel or macropore stracture, macroreticu-larity) and has to be measured for any resin. As a rule a variety of ions with the concentration in equiv./dm of the species i is present in a solution to be treated by ion exchange, for instance, the cations Na, , N7/4,, ... 

Air Products has recently launched a class of prodncts known as EnviroGem snrfactants, having excellent defoaming and wetting capacities. Air Products has described, in the patent literatnre, low HLB surfactants in this vein, including esters of dicarboxylic acids snch as the tartaric diesters shown in Figure 29.28 [17]. The esters are produced via acid-catlyzed esterification, where the catalyst can be an acid ion exchange resin or p-toluenesnlfonic acid (PTSA), and the reaction is further... 

Good wetting capacity to maximise mechanical properties. 

According to De Bruyne s rule, the greater the difference in the wetting capacity of the contiguous surfaces, the smaller is the adhesion, A difference in wetting power may be achieved not only by hydrophobization but also by hydrophilization of the surface, i,e, adhesion may also be reduced by changing the hydrophilic properties. 

Surface-active substances raising the spreading and wetting capacities of pesticide liquids may at the same time reduce the adhesive qualities of the particles, particularly under the influence of atmospheric deposits. With increasing concentration of the SAS the adhesion usually diminishes. It is therefore important to introduce the optimum quantity of SAS into the spraying compositions... 

Like other EO/PO nonionics, they exhibit an inverse %ater-solubility behavior versus temperature (cloud point). Silicone surfactants show excellent wetting capacity on low-energy surfaces. Also, their diluted solutions can considerably decrease the surface tension to below 20 dyn/cm. 

Interferences in electrothermal evaporation may stem from differences in the physical properties between the liquid samples. Indeed, these properties influence the wetting capacities of the graphite or the metal of the electrothermal device. 

Uses Low foaming detergent suitable for rinse aids to improve dispersing capacity and dispersion of rinse aid in stream of hot water improves wetting capacity of low foam cleaners on hard surfaces... 

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