Surfactant adsorption kinetics in microfluidics
نویسندگان
چکیده
منابع مشابه
Surfactant adsorption kinetics in microfluidics.
Emulsions are metastable dispersions. Their lifetimes are directly related to the dynamics of surfactants. We design a microfluidic method to measure the kinetics of adsorption of surfactants to the droplet interface, a key process involved in foaming, emulsification, and droplet coarsening. The method is based on the pH decay in the droplet as a direct measurement of the adsorption of a carbox...
متن کاملKinetics of Surfactant Adsorption at Fluid-Fluid Interfaces: Surfactant Mixtures
The adsorption at the interface between an aqueous solution of several surface-active agents and another fluid (air or oil) phase is addressed theoretically. We derive the kinetic equations from a variation of the interfacial free energy, solve them numerically, and provide an analytic solution for the simple case of a linear adsorption isotherm. Calculating asymptotic solutions analytically, w...
متن کاملKinetics of Surfactant Adsorption at Fluid-Fluid Interfaces
We present a theory for the kinetics of surfactant adsorption at the interface between an aqueous solution and another fluid (air, oil) phase. The model relies on a free-energy formulation. It describes both the diffusive transport of surfactant molecules from the bulk solution to the interface, and the kinetics taking place at the interface itself. When applied to non-ionic surfactant systems,...
متن کاملKinetics of Surfactant Adsorption: The Free Energy Approach
We review the free energy approach to the kinetics of surfactant adsorption at fluid/fluid interfaces. The formalism is applied to several systems. For non-ionic surfactant solutions the results coincide with previous models while indicating their limits of validity. We study the case of surfactant mixtures, focusing on the relation between the mixture kinetics and the properties of its individ...
متن کاملAdsorption Kinetics of Surfactant Used in CO2-Foam Flooding onto Berea Sandstone
This paper was selected for presentation by an SPE Program Committee following review of information contained in a proposal submitted by the author(s).
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2016
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1604307113