Henkensmeier, Dirk Ben Youcef, Hicham Wallasch, Frank Gubler, Lorenz 2024-01-20T11:04:12Z 2024-01-20T11:04:12Z 2021-09-05 2013-11 0376-7388 https://pubs.kist.re.kr/handle/201004/127490 A new membrane material for polymer electrolyte fuel cells (PEFC), ETFE-graft-poly(alpha-methylstyrene-sulfonic acid-co-methacrylonitrile), is presented, Its preparation by radiation-induced grafting and the dependence of the reaction kinetics on the irradiation dose (3 and 15 kGy) and crosslinker concentration are reported. A series of divinylbenzene crosslinked and uncrosslinked membranes is characterised with respect to ion exchange capacity (IEC) (up to 2.1 mmol/g), proton conductivity (up to 92 mS/cm at room temperature), and water uptake (10-67%). Furthermore, the correlation between the dimensional stability of the membrane and the graft level is presented. The ex situ hydrolytic stability of the membranes was tested and analysed by infrared (IR) spectroscopy. In a hydrogen/oxygen PEFC at 80 degrees C, Nafion 212 and a 35 mu m thick grafted membrane showed the same performance, whereas the hydrogen permeability of the grafted membrane is only one third compared to that of Nafion 212, (c) 2013 Elsevier B.V. All rights reserved English Elsevier BV Radiation grafted ETFE-graft-poly(alpha-methylstyrenesulfonic acid-co-methacrylonitrile) membranes for fuel cell applications Article 10.1016/j.memsci.2013.07.034 1 Journal of Membrane Science, v.447, pp.228 - 235 Journal of Membrane Science 447 228 235 N scie scopus 000324526500026 2-s2.0-84881500324 Engineering, Chemical Polymer Science Engineering Polymer Science Article POLYMER ELECTROLYTE MEMBRANES PROTON-CONDUCTING MEMBRANES POLY(ARYLENE ETHER SULFONE) EXCHANGE MEMBRANES CROSS-LINKER ALPHA-METHYLSTYRENE PERFORMANCE FEP POLY(TETRAFLUOROETHYLENE-CO-HEXAFLUOROPROPYLENE) STYRENE/DIVINYLBENZENE Proton exchange membrane Radiation grafting ETFE Alpha-methylstyrene (AMS) Polymer electrolyte fuel cell (PEFC)