Dynamic wettability

Dynamic Wettability In electrophotography, the toner spreading process has been characterized by the following shift factor (3) ... 

Dynamic Wettability" Tappi 1981 Sizing Short Course Chicago, 1981. 

M.J. Owen, T.M. Gentle, T. Orbeck and D.E. Williams, Dynamic wettability of hydrophobic polymers,... 

Huang, F., et al.. Dynamic Wettability and Contact Angles of Poly (Vinylidene Fluoride) Nanofiber Membranes Grafted with Acrylic Acid. Express Polymer Letters, 2010,4(9), 551-558. 

Huang, F.L., Wang, Q.Q., Wei, Q.R, Gao, W.D., Shou, H.Y, Jiang, S.D., 2010, Dynamic wettability and contact angles of poly(vinylidene fluoride) nanofiber membranes grafted with acrylic acid. Express Polym Letters 4(9) 557-558. 

Tackifying resins enhance the adhesion of non-polar elastomers by improving wettability, increasing polarity and altering the viscoelastic properties. Dahlquist [31 ] established the first evidence of the modification of the viscoelastic properties of an elastomer by adding resins, and demonstrated that the performance of pressure-sensitive adhesives was related to the creep compliance. Later, Aubrey and Sherriff [32] demonstrated that a relationship between peel strength and viscoelasticity in natural rubber-low molecular resins blends existed. Class and Chu [33] used the dynamic mechanical measurements to demonstrate that compatible resins with an elastomer produced a decrease in the elastic modulus at room temperature and an increase in the tan <5 peak (which indicated the glass transition temperature of the resin-elastomer blend). Resins which are incompatible with an elastomer caused an increase in the elastic modulus at room temperature and showed two distinct maxima in the tan <5 curve. 

Blake TD (1993) Dynamic contact angles and wetting kinetics. In Berg JC (ed) Wettability. Dekker, New York, pp 251-309... 

While the above refers mainly to the static limit, new effects come into play when a moving contact line, i.e. spreading, is considered. It has been observed experimentally that the contact angle of a moving contact line 0, the dynamic contact angle, deviates from the corresponding static value 0. As an example, for a completely wettable surface (i.e. 6(, = 0), a relationship of the form... 

Formation Wettability Studies that Incorporate the Dynamic Wilhelmy Plate Technique... 

The Wilhelmy hanging plate method (13) has been used for many years to measure interfacial and surface tensions, but with the advent of computer data collection and computer control of dynamic test conditions, its utility has been greatly increased. The dynamic version of the Wilhelmy plate device, in which the liquid phases are in motion relative to a solid phase, has been used in several surface chemistry studies not directly related to the oil industry (14- 16). Fleureau and Dupeyrat (17) have used this technique to study the effects of an electric field on the formation of surfactants at oil/water/rock interfaces. The work presented here is concerned with reservoir wettability. 

Dynamic Wilhelmy wettability tests on single component systems, such as hexadecane/water/glass, can be done quickly in open beakers. 

Lee, W.J., Seferis, J.C. and Berg, J.C. (1988). Characterizing high performance composite processability with dynamic fiber wettability measurements. Polym. Composites 9, 36-41. 

In this chapter, the development of a mesoscopic modeling formalism is presented in order to gain fundamental insight into the structure-wettability influence on the underlying liquid water transport and interfacial dynamics in the PEFC CL and GDL. 

These comments should not be interpreted to mean that measures of wettability are useless at predicting adhesion. They do seem clearly to indicate that contact angles and critical surface tensions reported for wood are not necessarily thermodynamic quantities or well-defined material parameters. Because most contact angles are dynamic values, they should be interpreted with caution and considered as relative measures of adhesion, for which the absolute scale is yet unknown. Further, we need to keep in mind that although wetting is necessary for adhesion, it may not be the limiting factor in many real situations. 

Wettability Contact angle tensiometer Moisture sorption Dynamic moisture/vapor sorption analysis... 

Knowledge of the surface dynamics of a solid has recently allowed significant progress in many academic and scientific fields adsorption (gas-solid interaction), wettability (liquid-solid), adhesion (solid-solid), and in applications catalysis [1,2], membrane [3,4], friction [5-8], blending [9,10],... 

In this chapter, we concentrate on the role of the intermolecular interactions at interfaces based on the surface dynamics, the surface free energy at a given temperature and the surface energy (or enthalpy) of a solid. Contact angle and gas chromatographic techniques are respectively chosen for the studies of wettability and adsorption phenomena because of their simplicity and clearness. The degree of adhesion at interfaces between unlike solid substances is also discussed from a viewpoint of intermolecular interactions. 

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