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Mixed adsorption mechanism for the kinetics of BLG interfacial layer formation at the solution/tetradecane interface

MPG-Autoren
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Won,  J. Y.
Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Gochev,  G.
Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Ulaganathan,  V.
Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Krägel,  J.
Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Miller,  R.
Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Zitation

Won, J. Y., Gochev, G., Ulaganathan, V., Krägel, J., Aksenenko, E. V., Fainerman, V. B., et al. (2017). Mixed adsorption mechanism for the kinetics of BLG interfacial layer formation at the solution/tetradecane interface. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 519, 146-152. doi:10.1016/j.colsurfa.2016.08.024.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002B-45AA-4
Zusammenfassung
The adsorption kinetics of β-lactoglobulin (BLG) at the water/tetradecane (W/TD) interface as studied by drop profile analysis tensiometry is significantly controlled by the diffusional transport in the aqueous solution bulk. However, due to the contact with the hydrophobic oil phase the protein molecules change their conformation in order to adapt to the interfacial environment. This conformational change can be expressed via the adsorption activity constant. The analysis of the dynamic interfacial tensions leads to much lower activities at short adsorption times and low surface coverages. This allows to conclude that in the early stage of the adsorption layer formation the structure of the BLG adsorption layer at the W/TD interface is similar to that at the water/air (W/A) interface.