Influence of poly(3-octylthiophene) on the water transport through methacrylic-acrylic based polymer membranes

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Fredrik Sundfors, Lajos Höfler, Róbert E. Gyurcsányi, Tom Lindfors
Publisher: WILEY-BLACKWELL
Publication year: 2011
Journal: Electroanalysis
Journal acronym: ELECTROANAL
Volume number: 23
Issue number: 8
Start page: 1769
End page: 1772
Number of pages: 4
ISSN: 1040-0397
eISSN: 1521-4109


Abstract

Accumulation of water in ion-selective membranes, can lead to inconsistent potentiometric responses with solid-contact ion-selective electrode (SC-ISE) formats, and hence it is essential to restrain their water uptake. We have used FTIR-ATR spectroscopy to study how the water uptake is influenced by the intermixing of a poly(3-octylthiophene) (POT) SC and a poly(methyl methacrylate):poly(n-decyl methacrylate) (PMMA:PDMA) based polymeric membrane matrix, the only SC-ISE system for which direct evidence was provided on the aqueous layer elimination. Numerical simulations of the FTIR-ATR spectra of 1 or 5 wt% POT containing PMMA:PDMA membranes showed that the addition of 5 wt% POT to the membrane lowered the equilibrium water uptake, whereas the diffusion coefficients of water in the membrane were found to be less affected. Consequently, POT is beneficial for preventing the formation of detrimental water layers in the SC-ISE structure.


Keywords

Acrylate polymer, Conducting polymer, FTIR-ATR spectroscopy, Ion-selective membranes, Water transport

Last updated on 2019-18-10 at 03:42