Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell
Chitosan/poly(vinyl sulfonic acid) (PVS) films have been prepared on Nafion® membranes by the layer-by-layer (LbL) method for use in direct methanol fuel cell (DMFC). Computational methods and Fourier transform infrared (FTIR) spectra suggest that an ionic pair is formed between the sulfonic group of PVS and the protonated amine group of chitosan, thereby promoting the growth of LbL films on the Nafion® membrane as well as partial blocking of methanol. Chronopotentiometry and potential linear scanning experiments have been carried out for investigation of methanol crossover through the Nafion® and chitosan/PVS/Nafion® membranes in a diaphragm diffusion cell. On the basis of electrical impedance measurements, the values of proton resistance of the Nafion® and chitosan/PVS/Nafion® membranes are close due to the small thickness of the LbL film. Thus, it is expected an improved DMFC performance once the additional resistance of the self-assembled film is negligible compared to the result associated with the decrease in the crossover effect.
Main Authors: | , , , , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Química
2012
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000300021 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
oai:scielo:S0103-50532012000300021 |
---|---|
record_format |
ojs |
spelling |
oai:scielo:S0103-505320120003000212012-04-04Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cellVinhola,LeonardoFacci,TiagoDias,Luis G.Azevedo,Dayse C. deBorissevitch,GalinaHuguenin,Fritz chitosan direct methanol fuel cell proton exchange membrane crossover effect methanol permeability Chitosan/poly(vinyl sulfonic acid) (PVS) films have been prepared on Nafion® membranes by the layer-by-layer (LbL) method for use in direct methanol fuel cell (DMFC). Computational methods and Fourier transform infrared (FTIR) spectra suggest that an ionic pair is formed between the sulfonic group of PVS and the protonated amine group of chitosan, thereby promoting the growth of LbL films on the Nafion® membrane as well as partial blocking of methanol. Chronopotentiometry and potential linear scanning experiments have been carried out for investigation of methanol crossover through the Nafion® and chitosan/PVS/Nafion® membranes in a diaphragm diffusion cell. On the basis of electrical impedance measurements, the values of proton resistance of the Nafion® and chitosan/PVS/Nafion® membranes are close due to the small thickness of the LbL film. Thus, it is expected an improved DMFC performance once the additional resistance of the self-assembled film is negligible compared to the result associated with the decrease in the crossover effect.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society v.23 n.3 20122012-03-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000300021en10.1590/S0103-50532012000300021 |
institution |
SCIELO |
collection |
OJS |
country |
Brasil |
countrycode |
BR |
component |
Revista |
access |
En linea |
databasecode |
rev-scielo-br |
tag |
revista |
region |
America del Sur |
libraryname |
SciELO |
language |
English |
format |
Digital |
author |
Vinhola,Leonardo Facci,Tiago Dias,Luis G. Azevedo,Dayse C. de Borissevitch,Galina Huguenin,Fritz |
spellingShingle |
Vinhola,Leonardo Facci,Tiago Dias,Luis G. Azevedo,Dayse C. de Borissevitch,Galina Huguenin,Fritz Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell |
author_facet |
Vinhola,Leonardo Facci,Tiago Dias,Luis G. Azevedo,Dayse C. de Borissevitch,Galina Huguenin,Fritz |
author_sort |
Vinhola,Leonardo |
title |
Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell |
title_short |
Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell |
title_full |
Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell |
title_fullStr |
Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell |
title_full_unstemmed |
Self-assembled films from chitosan and poly(vinyl sulfonic acid) on Nafion® for direct methanol fuel cell |
title_sort |
self-assembled films from chitosan and poly(vinyl sulfonic acid) on nafion® for direct methanol fuel cell |
description |
Chitosan/poly(vinyl sulfonic acid) (PVS) films have been prepared on Nafion® membranes by the layer-by-layer (LbL) method for use in direct methanol fuel cell (DMFC). Computational methods and Fourier transform infrared (FTIR) spectra suggest that an ionic pair is formed between the sulfonic group of PVS and the protonated amine group of chitosan, thereby promoting the growth of LbL films on the Nafion® membrane as well as partial blocking of methanol. Chronopotentiometry and potential linear scanning experiments have been carried out for investigation of methanol crossover through the Nafion® and chitosan/PVS/Nafion® membranes in a diaphragm diffusion cell. On the basis of electrical impedance measurements, the values of proton resistance of the Nafion® and chitosan/PVS/Nafion® membranes are close due to the small thickness of the LbL film. Thus, it is expected an improved DMFC performance once the additional resistance of the self-assembled film is negligible compared to the result associated with the decrease in the crossover effect. |
publisher |
Sociedade Brasileira de Química |
publishDate |
2012 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000300021 |
work_keys_str_mv |
AT vinholaleonardo selfassembledfilmsfromchitosanandpolyvinylsulfonicacidonnafionfordirectmethanolfuelcell AT faccitiago selfassembledfilmsfromchitosanandpolyvinylsulfonicacidonnafionfordirectmethanolfuelcell AT diasluisg selfassembledfilmsfromchitosanandpolyvinylsulfonicacidonnafionfordirectmethanolfuelcell AT azevedodaysecde selfassembledfilmsfromchitosanandpolyvinylsulfonicacidonnafionfordirectmethanolfuelcell AT borissevitchgalina selfassembledfilmsfromchitosanandpolyvinylsulfonicacidonnafionfordirectmethanolfuelcell AT hugueninfritz selfassembledfilmsfromchitosanandpolyvinylsulfonicacidonnafionfordirectmethanolfuelcell |
_version_ |
1756403471716712448 |