TY - JOUR
T1 - Modification of a Nafion membrane by n-dodecyltrimethylammonium cation inclusion for potential application in DMFC
AU - de Yuso, María Del Valle Martínez
AU - Cuberes, Maria Teresa
AU - Romero, Virginia
AU - Neves, Luísa
AU - Coelhoso, Isabel Maria Rola
AU - Crespo, João Paulo Serejo Goulão
AU - Rodriguez-Castellon, Enrique
AU - Benauente, Juana
N1 - We thank to CICYT (Project CTQ2011-27770, FEDER Funds) for financial support. V. Romero acknowledges to MICINN, Spain, her FPU scholarship.
PY - 2014/3/6
Y1 - 2014/3/6
N2 - Changes in a protonated Nafion-112 membrane as a result of the incorporation of the cation n-dodecyltrimethylammonium (DTA(+)) by proton exchange mechanism are studied. Membrane surface modifications were analysed by AFM, XPS and contact angle measurements in order to obtain information about changes in the membrane surface roughness, chemical nature and hydrophobic character, while electrochemical impedance spectroscopy (EIS) and methanol permeation measurements were carried out to establish changes in the bulk membrane. The reduction obtained for the surface roughness and the hydrophobic character of Nafion-112/DTA(+) equilibrated membrane as well as for the fluorine atomic concentration percentage and the increase in nitrogen percentage indicates modification of Nafion-112 membrane surface, while the increase of electrical resistance and the decrease of methanol permeability give information on bulk membrane changes. The higher thermal stability and lower water loss of the Nafion-112/DTA(+) membrane are points of interest for applications such as PEMFC or DMFCs, respectively. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
AB - Changes in a protonated Nafion-112 membrane as a result of the incorporation of the cation n-dodecyltrimethylammonium (DTA(+)) by proton exchange mechanism are studied. Membrane surface modifications were analysed by AFM, XPS and contact angle measurements in order to obtain information about changes in the membrane surface roughness, chemical nature and hydrophobic character, while electrochemical impedance spectroscopy (EIS) and methanol permeation measurements were carried out to establish changes in the bulk membrane. The reduction obtained for the surface roughness and the hydrophobic character of Nafion-112/DTA(+) equilibrated membrane as well as for the fluorine atomic concentration percentage and the increase in nitrogen percentage indicates modification of Nafion-112 membrane surface, while the increase of electrical resistance and the decrease of methanol permeability give information on bulk membrane changes. The higher thermal stability and lower water loss of the Nafion-112/DTA(+) membrane are points of interest for applications such as PEMFC or DMFCs, respectively. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
KW - AFM
KW - Impedance spectroscopy
KW - Methanol permeation
KW - n-Dodecyltrimethylammonium cation
KW - Nafion
KW - XPS
U2 - 10.1016/j.ijhydene.2013.05.046
DO - 10.1016/j.ijhydene.2013.05.046
M3 - Article
VL - 39
SP - 4023
EP - 4029
JO - International Journal Of Hydrogen Energy
JF - International Journal Of Hydrogen Energy
SN - 0360-3199
IS - 8
ER -