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.

Surface active agents, Surface Active Agent Manufacturing, Protein research, Chemical reaction, Rate of, Chemical kinetics, Properties

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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.

Adsorption, Enthalpy, Rheology, Entropy (Physics), Entropy (Thermodynamics)

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

Article Abstract:

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.

Research, Surface tension

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