Effect on interfacial properties

Dauphas, S., Mouhous-Riou, N., Metro, B., Mackie, A.R., Wilde, P.J., Anton, M., Riau-blanc, A. (2005). The supramolecular organization of p-casein effect on interfacial properties. Food Hydrocolloids, 19, 387-393. 

The purification of surfactants has to be performed in a way that addresses their specific effects on interfacial properties. Thus, chemical purification procedures, such as recrystallisation, distillation, flocculation, and washing with organic solvents, are important steps (Czichocki et al. 1981) but usually do not lead to a sufficient purity, i.e. surface-chemical purity. Therefore, efficient purification methods are based on interfacial principles. 

Compositional Effects on Interfacial Properties in Contaminated Systems Implications for Organic Liquid Migration and Recovery... 

S. Mukherjee and A. P. Kushnick. Effect of demulsifiers on interfacial properties governing crude oil demulsification. In Proceedings Volume. Annu AICHE Mtg (New York, 11/15-11/20), 1987. 

Effect of Demulsifiers on Interfacial Properties Governing Crude Oil Demulsification... 

Particle/particle interactions induce aggregation, while matrix/filler interaction leads to the development of an interphase with properties different from those of both components. Both influence composite properties significantly. Secondary, van der Waals forces play a crucial role in the development of these interactions. Their modiflcation is achieved by surface treatment. Occasionally reactive treatment is also used, although its importance is smaller in thermoplastics than in thermoset matrices. In the following sections of this chapter attention is focused on interfacial interactions, their modification and on their effect on composite properties. 

In considering the impact of thermodynamically favourable interactions between biopolymers on the formation and stabilization of food colloids, a number of regular trends can be identified. One of the most important aspects is the effect of complexation on interfacial properties, including rates of adsorption and surface rheological behaviour. 

In the following paragraphs an overview of damage due to thermal shock and its effect on the mechanical properties of CMCs with different fibre architectures is provided for a number of different reinforcement architectures. Subsequently, the effect of thermal shock on interfacial properties is discussed, followed by a description of attempts to analyse and model the thermal shock behaviour of these materials. 

Mukherjee, S. Kushnick, A.P. Effects of Demulsifiers on Interfacial Properties Governing Crude Oil Demulsification in Oil-Field Chemistry, Enhanced Recovery and Production Stimulation, Borchardt, J.K. Yen, T.F. (Eds.), American Chemical Society Washington,... 

Ringard-Lefebvre, C., Bochot, A., Mcmigoglu, E., Charon, D., Duchene, D., and Baszkin, A. (2002), Effect of spread amphiphilic P-cyclodextrins on interfacial properties of the oil/water system, Coll. Surf. B Biointerf, 25,109-117. 

The overall objective of this research program is to determine the effect of mixed emulsifiers on interfacial properties in relation to miniemulsion formation and stabilization. Based on the previously discussed affects, the immediate objective of this phase of the research program was aimed at understanding the interactions that occur between mixed emulsifier molecules and miniemulsion oil droplets. 

Equilibration Studies, Because the formation of an interfacial layer is a dynamic phenomenon, experiments were conducted to study the effect of oil-water phase equilibria on interfacial properties. Two experiments were carried out where aqueous solutions of 1 1 SLS/LA were equilibrated with both styrene and toluene in sealed containers, without agitation for five weeks. Several important observations were made (a) Despite the presence of mixed emulsifiers,... 

An evaluation of the effects of natural macromolecules with reactive functional groups on the structure, speciation, and electrical properties of solid-water interfaces and of the influence of major divalent ions on interfacial properties is a necessary and underdeveloped component of a quantitative conceptual formulation of the kinetics of particle-particle interactions in aquatic systems. 

The small differences in the Glc data for equivalent 3LA and 3LAI materials show that the increased level of interfacial graft-linking in the 3LAI particles has no significant effect on impact properties. 

Rosen, M.J. and Murphy, D.S. (1991) Effect ofthe nonaqueos phase on interfacial properties of surfactants. 2. Individual and mixed non-ionic surfactants in hydrocarbon/water systems. Langmuir, 7, 2630-2635. 

Effects of Alcohols. Alcohols are common additives to many surfactant formulations being considered for oil recovery. Wade (12) has studied the effect of alcohol additions on interfacial properties and phase behavior for pure alkyl benzene sulfonates. 

One of the main objectives of this study has been to determine the effect of interfacial properties on coalescence, emulsion stability and oil recovery efficiency for various surfactant and caustic systems. We have recently reported (6, 19) that for a petroleum sulfonate system there is no direct correlation between rates of coalescence and interfacial tension or interfacial charge. However, a qualitative correlation has been found between coalescence rates and interfacial viscosities. 

For the above sparingly soluble minerals, the effect of dissolved species on interfacial properties can be marked. Results obtained for the zeta-potential of apatite and calcite in water and in 2 x 10 M KNO3 solutions are given in Fig. 3.7. It can be seen that the isoelectric points of calcite and apatite in both water and KNO3 solutions are about 10.5 and 7.4, respectively. The effect of the supernatant of calcite on the zeta-potential of apatite is also shown in Fig. 3.8. 

The literature concerning the quartz crystal microbalance (QCM) and its electrochemical analog, the electrochemical EQCM, is wide and diverse. Many reviews are available in the Uterature, discussing the fundamental properties of this device and its numerous appUcations, including its use in electrochemistry [1-7]. In this chapter we focus on the effect of interfacial properties on the QCM response, specifically when the device is immersed in a fiquid. 

Mysels Florence (1970, 1973) were the first to study the effect of surface active impurities on interfacial properties systematically. They demonstrated the importance of the grade of purity of a surfactant solution, especially for dynamic interfacial investigations, and derived a... 

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