Chemical Polymerization of Aniline on a Poly(styrene sulfonic acid) Membrane: Controlling the Polymerization Site Using Different Oxidants
- 1 July 2005
- journal article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry B
- Vol. 109 (29), 14085-14092
- https://doi.org/10.1021/jp051278m
Abstract
Poly(styrene sulfonic acid) membranes (Neosepta CMX, Tokuyama Corp.) have been modified by in situ polymerization of aniline. (NH4)2S2O8, FeCl3, H2O2, and KIO3 were used as oxidizing agents, and two different modification methods (single-step versus two-step) were studied. The composite membranes were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, elemental analysis, electrodialysis, ion-exchange capacity, and conductivity measurements. Our results demonstrate that it is possible to control the polymerization site of aniline which in turn affects the membrane selectivity properties. Hence, composite membranes having a very thin and homogeneous surface polyaniline layer lead to a very low transport of Zn2+ without increasing significantly the resistance to H+ conductivity. On the other hand, membranes containing about the same quantity of PANI but inside the membrane do not block the transport of Zn2+.Keywords
This publication has 27 references indexed in Scilit:
- Simultaneous occurrence of polymerization and decomposition of polyaniline filmsElectrochimica Acta, 2005
- Partitioning and Polymerization of Pyrrole into Perfluorosulfonate (Nafion) Membranes under Neutral ConditionsThe Journal of Physical Chemistry B, 2003
- The Use of Conducting Polymers in Membrane‐Based SeparationsAnnals of the New York Academy of Sciences, 2003
- Characterization of a Cation-Exchange/Polyaniline Composite MembraneLangmuir, 2003
- Degradation mechanism of polystyrene sulfonic acid membrane and application of its composite membranes in fuel cellsPhysical Chemistry Chemical Physics, 2002
- Chemical Modification of a Sulfonated Membrane with a Cationic Polyaniline Layer to Improve its PermselectivityElectrochemical and Solid-State Letters, 2002
- XPS Study of Highly Sulfonated PolyanilineMacromolecules, 1999
- Composite Membranes Prepared from Cation Exchange Membranes and Polyaniline and Their Transport Properties in ElectrodialysisJournal of the Electrochemical Society, 1999
- X-ray Photoelectron Spectroscopic Studies of Interactions between Poly(4-vinylpyridine) and Poly(styrenesulfonate) SaltsMacromolecules, 1998
- An ion gate membrane: electrochemical control of ion permeability through a membrane with an embedded electrodeJournal of the American Chemical Society, 1982