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Dilational visco-elasticity of BLG adsorption layers at the solution/tetradecane interface – Effect of pH and ionic strength
- Source :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects. 521:204-210
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
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 0.01–0.2 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 and 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. Refereed/Peer-reviewed
- Subjects :
- Aqueous solution
beta-lactoglobulin
Drop (liquid)
Analytical chemistry
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
Colloid and Surface Chemistry
Isoelectric point
Adsorption
drop profile analysis tensiometry
chemistry
Ionic strength
water-tetradecane interface
Profile analysis
Elasticity (economics)
0210 nano-technology
Tetradecane
Subjects
Details
- ISSN :
- 09277757
- Volume :
- 521
- Database :
- OpenAIRE
- Journal :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects
- Accession number :
- edsair.doi.dedup.....b1b74b544af264e5b57a0800b6d663e3