Journal article
The effect of alkane tail length of CiE8 surfactants on transport to the silicone oil-water interface
Journal of colloid and interface science, v 355(1), pp 231-236
01 Mar 2011
PMID: 21208623
Abstract
Detailed surfactant transport studies have typically been restricted to the air-water interface. This is mainly due to the lack of experimental devices and techniques available to study liquid-liquid interfaces. As a result, there is a lack of relevant data and understanding of surfactant behavior in microfluidic studies and emulsion applications. Using a novel shape fitting algorithm for a pendant drop capable of handling fluids of similar densities, i.e. low Bond numbers, we measure the dynamic surface tension as a function of bulk surfactant concentration at the silicone oil-water interface for a homologous series of CiE8 nonionic surfactants. We show that the isotherms governing equilibrium at the oil-water and air-water interfaces are very different. Using a scaling analysis comparing two governing mass transport timescales, we demonstrate that there exists a transition from diffusion-limited to kinetic-limited dynamics at the silicone oil-water interface. Adsorption rate constants are determined from a one parameter nonlinear fit to dynamic surface tension data. These results demonstrate that the dynamics of interfacial transport are highly dependent on the immiscible fluids that form the interface. (C) 2010 Elsevier Inc. All rights reserved.
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Details
- Title
- The effect of alkane tail length of CiE8 surfactants on transport to the silicone oil-water interface
- Creators
- Nicolas J. Alvarez - Carnegie Mellon UniversityWingki Lee - Carnegie Mellon UniversityLynn M. Walker - Carnegie Mellon UniversityShelley L. Anna - Carnegie Mellon University
- Publication Details
- Journal of colloid and interface science, v 355(1), pp 231-236
- Publisher
- Elsevier
- Number of pages
- 6
- Grant note
- CBET-0730727 / NSF; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000286570900030
- Scopus ID
- 2-s2.0-78651072123
- Other Identifier
- 991019292226004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical