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  Dilational visco-elasticity of BLG adsorption layers at the solution/tetradecane interface – Effect of pH and ionic strength

Won, J. Y., Gochev, G., Ulaganathan, V., Krägel, J., Aksenenko, E. V., Fainerman, V. B., et al. (2017). Dilational visco-elasticity of BLG adsorption layers at the solution/tetradecane interface – Effect of pH and ionic strength. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 521, 204-210. doi:10.1016/j.colsurfa.2016.08.054.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-45A8-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-BFBD-C
Genre: Journal Article

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 Creators:
Won, J. Y.1, Author              
Gochev, G.1, Author              
Ulaganathan, V.1, Author              
Krägel, J.1, Author              
Aksenenko, E. V., Author
Fainerman, V. B., Author
Miller, R.1, Author              
Affiliations:
1Reinhard Miller, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863501              

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Free keywords: Beta-lactoglobulin; Water-tetradecane interface; Drop profile analysis tensiometry; Oscillating drop method; Dilational visco-elasticity; pH effect; Ionic strength effect
 Abstract: Drop profile analysis tensiometry is applied to measure the dilational visco-elasticity of BLG at the buffered aqueous solution/tetradecane (W/TD) interface using oscillating drops of TD immersed in W at frequencies between 0.01 to 0.2 Hz. The buffered solutions were investigated at pH 3, pH 5 (isoelectric point) and pH 7 at different buffer concentrations (1 mM, 10 mM and 100 mM). The real part of the complex visco-elasticity shows a maximum when plotted as a function of the interfacial pressure Π. In contrast to the water/air surface (W/A) where we observe maximum elasticity values between 15–20 mN/m, at the W/TD interface these maximum values are up to 65–70 mM/m, which is in parallel with the much higher interfacial pressure values at the W/TD interface when compared to the W/A surface.

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 Dates: 2016-08-242017-05-20
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1016/j.colsurfa.2016.08.054
BibTex Citekey: Won2016
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Title: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 521 Sequence Number: - Start / End Page: 204 - 210 Identifier: ISSN: 0927-7757