Kinetics of the desorption of surfactants and proteins from adsorption layers at the solutions/air interface

Article Abstract:

The study shows that the DeSNa desorption kinetics is governed by a pure diffusion mechanism while the desorption of more surface-active surfactants such as C13 DMPO and Triton X-100 obeys a mixed mechanism. The analysis of the study indicates that the temperature dependence of the beta-lactoglobulin (BLG) desorption kinetics it is possible to calculate the activation energy of this process, which is quite close to the free energy of BLG adsorption.

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Adsorption behavior and dilational rheology of the cationic alkyl trimethylammonium bromides at the water/air interface

Article Abstract:

The dynamic and equilibrium surface tensions of the cationic alkyl trimethylammonium bromides (C(sub n)TAB) solutions for n =12, 14 and 16 are studied using ring and bubble pressure tensiometry. A new theoretical model is used, which assumes intrinsic compressibility of the surfactant molecules in the adsorption layer and accounts for the nonideality of the surface layer enthalpy and entropy.

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Adsorption of protein layers at the water/air interface as studied by axisymmetric drop and bubble shape analysis

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The use of bubbles makes it possible to obtain real equilibrium surface tension values of protein solutions. The establishment of equilibrium takes quite a long time.

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