English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/61525
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Gas transport and ionic transport in membranes based on polynorbornenes with functionalized imide side groups

AuthorsVargas, Joel; Santiago, Arlette A.; Tlenkopatchev, Mikhail A.; Gaviño, Rubén; Laguna, Maria Fe ; López-González, Mar; Riande, Evaristo
Issue Date2007
PublisherAmerican Chemical Society
CitationMacromolecules 40 (3) : 563–570 (2007)
AbstractThis work reports the synthesis and hydrogenation of polynorbornenes with functionalized imide side groups, specifically, poly(N-phenyl-exo,endo-norbornene-5,6-dicarboximide), as well as the sulfonation of the hydrogenated polymer. The gas transport characteristics and permselectivity of membranes prepared from the three separated polymers were thoroughly investigated. The results show that hydrogenation of the starting polymer promotes packaging efficiency, which is even enhanced by further sulfonation of the hydrogenated chains. The economy of free volume is reflected in the permeation and permselectivity coefficients of membranes prepared from the polymers. The study of electromotive forces of concentration cells with the sulfonated membrane separating hydrochloric solutions of different concentration suggests that the membranes exhibit high permselectivity to protons that decreases as concentration increases. However, a sharp increase in the electromotive force occurs at high concentrations. The fact that this increase is not observed in the electromotive forces of concentration cells with sodium chloride in the compartment cells suggests the formation of pair ions between protonated imide groups and chloride ions at high concentration that restrains co-ions mobility in the membrane. The membranes exhibit pretty good permselectivity to protons and sodium ions which makes them useful for ionic separation applications, such as electrodialysis. However, owing to the low water uptake, the protonic conductivity of the membranes equilibrated with water is nearly 2 orders of magnitude below that reported for Nafion membranes
Publisher version (URL)http://dx.doi.org/10.1021/ma062522q
Appears in Collections:(ICTP) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.