Journal
ADVANCES IN COLLOID AND INTERFACE SCIENCE
Volume 168, Issue 1-2, Pages 167-178Publisher
ELSEVIER
DOI: 10.1016/j.cis.2011.06.001
Keywords
Dynamic surface tension; Dilational rheology; Oscillating drop method; Maximum bubble pressure method; Drop profile analysis tensiometry; Capillary pressure tensiometry; Surfactants; Langmuir isotherm; Diffusion controlled adsorption
Categories
Funding
- DFG SPP 1506 [Mi418/18-1]
- European Space Agency (ESA) [FASES MAP AO-99-052]
- German Space Agency [DLR 50WM0941]
Ask authors/readers for more resources
Each experimental method has a certain range of application, and so do the instruments for measuring dynamic interfacial tension and dilational rheology. While the capillary pressure tensiometry provides data for the shortest adsorption times starting from milliseconds at liquid/gas and tens of milliseconds at liquid/liquid interfaces, the drop profile tensiometry allows measurements in a time window from seconds to many hours. Although both methods together cover a time range of about eight orders of magnitude (10(-3) s to 10(5) s), not all surfactants can be investigated with these techniques in the required concentration range. The same is true for studies of the dilational rheology. While drop profile tensiometry allows oscillations between 10(-3) Hz and 0.2 Hz, which can be complemented by measurements with capillary pressure oscillating drops and the capillary wave damping method (up to 10(3) Hz) these six orders of magnitude in frequency are often insufficient for a complete characterization of interfacial dilational relaxations of surfactant adsorption layers. The presented analysis provides a guide to select the most suitable experimental method for a given surfactant to be studied. The analysis is based on a diffusion controlled adsorption kinetics and a Langmuir adsorption model. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available