Abstract
An experimental method for measuring the permeability coefficient K for the permeation of air through black foam films is described. A series of measurements of K for sodium dodecyl sulfate plus sodium chloride aqueous solutions have been performed. Experimental results concerning the dependences of K on surfactant concentration C, NaCl concentration C e1 and temperature T are reported. A stepwise decrease in permeability K at the transition from common black film (CBF) to Newton black film (NBF) has been found, the K values of the thinnest NBF being 2–3 times lower than those of the essentially thicker CBE. The results show that gas permeation through black foam films is mainly determined by the properties of the surfactant layers: monolayers in the case of CBFs and a bilayer in the case of NBFs. The experimental results concerning the permeability of CBFs are discussed on the basis of theories of gas permeation through monomolecular layers.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
