Mono-micellar films

Figure 1. TEM micrographs of regular mono micellar films (a) loaded with (a) LiAuCU, and (b) where the aurate ions were converted to a single Au cluster per micelle prior to film casting. The scheme illustrates that in both cases a single gold particle remains at the place of the micelle.

The work presented in this paper shows the usefulness of the mono-layer technique to determine the interfacial properties of caseins. Characterization of casein Fractions at the air-water interface contributed to a better understanding of the nature of casein interactions in micellar organization. Preparation of NaCas/GMS mixed films provided relevant information about the manner in which proteins might be involved in the structure of fat globule membrane. 

As already mentioned, the surfactants are used to stabilize the liquid films in foams, in emulsions, on solid surfaces, and so forth. We will first consider the equilibrium and kinetic properties of surfactant adsorption monolayers. Various two-dimensional equations of state are discussed. The kinetics of surfactant adsorption is described in the cases of dijfusion and barrier control. Special attention is paid to the process of adsorption from ionic surfactant solutions. Theoretical models of the adsorption from micellar surfactant solutions are also presented. The rheological properties of the surfactant adsorption mono-layers, such as dilatational and shear surface viscosity and suiface elasticity, are introduced. The specificity of the proteins as high-molecular-weight surfactants is also discussed. 

The effect of alkanolamides (hand dishwashing liquids and shampoos) is difhcult to explain because they are, in fact, mixtures of free fatty acids, alkanolamine soaps, and fatty acid esters of the alkanolamine and of the alkanolamide. Nevertheless, it is reported that dialkanolamides are effective because of their ability to complex with the anionic, leading to stronger micellar interaction and, consequently, higher foam film viscosity as well as lowering the anionic s CMC [76]. The most often used are lauric/myristic mono-ethanolamides and coco diethanolamide. 

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