Surfactant model

The usefulness of the bond density surface is more apparent in the following model o diborane. The surface shows that diborane is not flat. It also shows that there is relatively little electron density between the two borons. Apparently there is no boron-boron bonr in this molecule. This is information that we can extract from the bond density surfact model. We do not have to assume this information in order to construct a model. We would need it in order to construct a conventional model. 

As a surfactant model for vitamin B Tagaki and Hara (1973) synthesized N-dodecylthiazolium salt [19]. The dissociation of the 2-proton in the micellar... 

Alkyl polyglycosides have long been known but only now, following several years research, has it been possible to develop reaction conditions that allow manufacture on a commercial scale. The structure on which these compounds are based corresponds exactly to the surfactant model described above. The hydro-phobic (or lipophilic) hydrocarbon chain is formed by a fatty alcohol (dodecanol/ tetradecanol) obtained from palm kernel oil or coconut oil. The hydrophilic part of the molecule is based on glucose (dextrose) obtained from starch (Fig. 4.14). 

Naire, S., Braun, R.J. andSnow, S.A. (2001) An insoluble surfactant model for a vertical draining free film with variable surface viscosity. Phys. Fluids, 13(9), 2492-502. 

The structures obtained with the surfactants modeled have a significant amount of micropores as observed from the PSD. The micro/mesopore distribution can be tuned by changing the solid sphere size. 

Jawitz, J.W., Dai, D., Rao, P.S.C., Annable, M.D. and Rhue, R.D. (2003) Rate-limited solubilization of multicomponent nonaqueous-phase Hquids by flushing with cosolvents and surfactants Modeling data from laboratory and field experiments. Environ. Sci. Technol., 37(9), 1983-1991. 

Effect of Ethoxylated Anionic Surfactants. Model system results for a series of sodium lauryl polyoxyethylene sulfates and sulfonates are presented in Table III. Surprisingly, the PLMA MW does not vary with the degree of ethoxylation However, the sulfonate results have larger M Ws than the sulfate results. 

Hu, Y, Wang, S. Q., and Jamieson, A. M., Rheological and flow birefringence studies of a shear-thickening complex fluid a surfactant model system, /. RheoL, 37,531-546 (1993b). 

S. Naire, R. J. Braun and S. A. Snow, An Insoluble Surfactant Model for a Vertical Draining Free Film II. Film Plus Meniscus in preparation, 2000. 

Saleem, M., Galla, H.-J. (2010) Surface view of the lateral organization of lipids and proteins in lung surfactant model systems—A ToF-SIMS approach. Biochim. Biophys. Acta, 1798,730-740. 

Table 1 Potential parameters for the non-polarizable and polarizable surfactant models...

Table 2 Na -surfactant Lennard-Jones parameters for the polarizable surfactant model...

For a given thickness of the falling film the number and type of instability modes in it substantially depend on the surfactant transfer model adopted. For the systems described by the insoluble surfactant model solutions of the explosive-growth wave type exist. In the systems in which the complete model of the adsorption-desorption processes is taken into account the instability is described only by solutions with finite amplification coefficients. 

Medronho B, Brown J, Miguel MG, Schmidt C, Olsson U, Galvosas P (2011) Planar lamellae and onions a spatially resolved rheo-NMR approach to the shear-induced structural transformations in a surfactant model system. Soft Matter 7 4938-4947... 

The mixed surfactant model could be generalised if a better definition of the surfactants present in the nSOW system could be foimd. The location of the nonionic surfactant during the different stages of phase inversion is also important. 

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