Membranes based on Nation (trademark of E. I. du pont de Nemours & Company), a copolymer of tetrafluorethylene and a vinylsulfonic acid, have received to date a great deal of experimental work (1-6) because of their very interesting characteristics for use in electrolysis (7, 8), fuel cells (9), and batteries (10, 11). Experimental results on mechanical (2), structural (4), chemical (6, 10), and transport properties (5, 8) of Nation membranes demonstrate that their peculiarity depends mainly on the ion sequestering structure (clusters) and swelling properties. The water content and salt up-take of the membrane exposed to electrolyte solutions are of fundamerital importance for the membrane transport properties (7, 12). Among the transport coefficients, the hydraulic permeability and filtration coefficient have been less extensively studied despite the useful correlations which can be stated between them and the electroosmotic permeability, pore diameter, and solvation (13). In this paper experimental results on the hydraulic and filtration coefficients of Nation 125, an homogeneous 5 mils thick membrane of 1200 equivalent weight, are presented. The dependence of these parameters on the applied pressure difference, salt concentration, and counterion nature is discussed.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 157.182.150.22 Downloaded on 2015-03-10 to IP
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.