A Raman spectro-microscopic investigation of ETFE-based radiation-grafted anion-exchange membranes
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چکیده
منابع مشابه
A Raman spectro-microscopic investigation of ETFE-based radiation-grafted anion-exchange membranes
This study used Raman spectro-microscopy to investigate the synthesis and degradation of radiationgrafted anion-exchange membranes (RG-AEM) made using 50 mm thick poly(ethylene-cotetrafluoroethylene) (ETFE) films, vinylbenzyl chloride (VBC) monomer, and 1-methylpyrrolidine (MPY) amination agent. The data obtained confirmed the operation of the grafting-front mechanism. VBC grafting times of 1 a...
متن کاملInvestigations of Conductivity in FEP-Based Radiation-Grafted Alkaline Anion-Exchange Membranes
A series of radiation-grafted alkaline anion-exchange membranes (AAEMs) with degrees of grafting (by mass) in the range 20 – 26% were produced and characterised. Conductivities (from impedance spectroscopy) up to 0.023 ± 0.001 S cm at 50 ± 1°C were demonstrated, which are between 20 – 50% of values for the commercial acidform membrane Nafion-115 (σ = 0.045 ± 0.004 (65°C) – 0.104 ± 0.008 (50 ± 1...
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Vinylbenzyl chloride was grafted onto PVDF and FEP polymer films using the radiation-grafting methodology. Subsequent reaction with trimethylamine and ion-exchange with potassium hydroxide yields alkaline anion-exchange membranes that are capable of conducting hydroxide ions; such membranes may be suitable for use in low temperature direct methanol fuel cells for portable devices. The PVDF base...
متن کاملRadiation–Grafted Alkaline Anion–Exchange Membranes Prepared with Reduced Monomer Quantities
Alkaline anion–exchange membranes (AAEM) for alkaline polymer electrolyte fuel cells (APEFC) were successfully prepared using electron beam irradiated poly(ethylene–co– tetrafluoroethylene) precursor films grafted with vinylbenzyl chloride (VBC) monomer. The resulting chloromethyl groups were subsequently reacted with trimethylamine to form quaternary ammonium anion–exchange functional head–gro...
متن کاملRadiation Grafted Membranes
The development of proton-exchange membranes for fuel cells has generated global interest in order to have a potential source of power for stationary and portable applications. The membrane is the heart of a fuel cell and the performance of a fuel cell depends largely on the physico-chemical nature of the membrane and its stability in the hostile environment of hydrogen and oxygen at elevated t...
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ژورنال
عنوان ژورنال: RSC Adv.
سال: 2017
ISSN: 2046-2069
DOI: 10.1039/c7ra09650j