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Citació: Ferreira, C. [et al.]. Transport of Metallic Ions through Polyaniline-containing composite membranes. "Journal of chemical and engineering data", 30 Setembre 2010, vol. 55, núm. 1, p. 4801-4807.
Títol: Transport of Metallic Ions through Polyaniline-containing composite membranes
Autor: Ferreira, Carlos; Casanovas, Jordi; Rodrigues, Marco A. S.; Muller, Francielli; Armelín Diggroc, Elaine Aparecida Veure Producció científica UPC; Alemán Llansó, Carlos Veure Producció científica UPC
Data: 30-set-2010
Tipus de document: Article
Resum: The extraction of Na+, Ni2+, and Cr3+ using six different membranes made of polyaniline composited with high-impact polystyrene, which differ in the doping agent and/or the preparation method, has been investigated. The swelling and ion-exchange capacities of the six polyaniline composited with high-impact polysterene (HIPS/PAni) membranes have been determined and compared with that of the commercial Selemion membrane. Electrodialysis tests using a five-compartment cell evidenced that the extraction of ions depends on the electronic structure of the SO3 - groups, which is modulated by the doping agent, and on both microstructure and electrical resistance of the membrane, which are regulated by the preparation method. The transport of ions through HIPS/PAni and Selemion membranes was found to be comparable. Quantum mechanical calculations on model complexes have been performed to characterize the electronic structure of the dopants. Results indicate that the strength of the interaction between the different doping agents and the polyaniline is inversely proportional to the concentration of negative charge in the SO3 - group of the former. Moreover, both the binding energy and the distribution of charges calculated for dopant · · · PAni complexes have been compared with those predicted for dopant · · · metallic ion complexes.
ISSN: 0021-9568
URI: http://hdl.handle.net/2117/10929
DOI: 10.1021/je1004033
Versió de l'editor: http://pubs.acs.org/doi/pdfplus/10.1021/je1004033
Apareix a les col·leccions:IMEM - Innovació, Modelització i Enginyeria en (BIO) Materials. Articles de revista
Departament d'Enginyeria Química. Articles de revista
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