Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0376-7388(99)00285-9
Title: Coupled H+/anion transport through polyaniline membranes
Authors: Wen, L.
Kocherginsky, N.M. 
Keywords: Anion transport
H+ ions transport
Membrane
Polyaniline
Issue Date: 14-Mar-2000
Citation: Wen, L.,Kocherginsky, N.M. (2000-03-14). Coupled H+/anion transport through polyaniline membranes. Journal of Membrane Science 167 (1) : 135-146. ScholarBank@NUS Repository. https://doi.org/10.1016/S0376-7388(99)00285-9
Abstract: Direct measurements of the H+ transport through polyaniline (PAN) membrane separating two aqueous solutions were conducted. It was demonstrated that Fick's law could not describe the H+ transport through PAN membrane. It was found that the transport of H+ from acidic to neutral solution through PAN membrane (~30 μm thickness) reaches its maximum steady state value after relatively long time. Time lag was 400 min at pH = 2 in the donor solution. This time lag value showed a strong dependence on the donor H+ concentration and decreased at lower pH. The steady state transport rate was less than 1.0 x 10-9 mol/s cm2 if the H+ concentration in the donor solution was less than 0.5 M, but then it increased sharply at higher [H+] to the level above 1.0 x 10-8 mol/s cm2. A kinetic model, taking into account coupled H+/anion transport, ion interactions with PAN polymer chains and their structural changes, is proposed. The large value of the time lag is explained on the basis of the idea about slow structural changes in the film during the H+ induced doping. (C) 2000 Elsevier Science B.V.
Source Title: Journal of Membrane Science
URI: http://scholarbank.nus.edu.sg/handle/10635/91913
ISSN: 03767388
DOI: 10.1016/S0376-7388(99)00285-9
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

16
checked on Nov 16, 2018

Page view(s)

33
checked on Nov 9, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.