Fabrication of PEFC membrane based on PTFE/FEP polymer-alloy using radiation-grafting

Evaluation of PEFC Membrane based on Cross-linked PTFE by EB Grafting: Effect of Thickness for FC Performance

“…The three thicknesses of thin PTFE membranes were prepared by wire-bar coater at atmospheric circumstances (wire-bar No. 9,12,16, coating speed: 16 mm/s, drying time by Halogen heater: 30 s), and were subjected to heat treatment at 80 C for 20 h and 150 C for 24 h. After sintering treatment, cross-linked PTFE (RX PTFE) membranes, and PTFE film (Naflon ® tape, NICHIAS) with the thickness of 50μm, which was used for comparison, were fabricated by EB (CURETRON ® , acceleration voltage: 200 kV, current: 1 mA, installed at RISE, Waseda University, NHV Corp.) irradiation under the nitrogen atmosphere at 335±5 C [9][10][11]. The irradiated RX PTFEs were grafted with styrene by EB irradiation at 15 kGy in the nitrogen atmosphere at room temperature (EB grafting method).…”

“…The less cost PEM is expected. In our previous study, PEMs were prepared by EB grafting of styrene onto base fluorinated polymer films, such as PTFE, FEP, etc., followed by sulfonation is designed as an alternative route to the preparation of relatively low cost [3].…”

Improvement of Dyeability of Para–-Aramid Fibers Using Electron–Beam–Induced Graft Polymerization

“…To improve the dyeability of para-aramid fibers, we therefore suggested modification of the fibers via electron-beam (EB)-induced graft polymerization [2][3][4][5][6][7][8]. EB is high-energy particle radiation.…”

Radiation-induced grafting of styrene onto ultra-high molecular weight polyethylene powder for polymer electrolyte fuel cell application

“…Almost all commercially available fluorinated polymers, such as polytetrafluoroethylene (PTFE) [14,15], Teflon-FEP [16,17] fluorinated ethylene propylene copolymer (FEP) [18,19], tetrafluoroethylene perfluoro(propyl vinyl ether) copolymer (PFA) [20,21], poly(vinylidene fluoride) (PVDF) [22,23], ethylenetetrafluoroethylene copolymer (ETFE) [24,25], polychlorotrifluoroethylene (PCTFE) [26], etc., have been reported as being used for radiation-induced grafting with styrene using either simultaneous irradiation or pre-irradiation methods. Irradiation of polymer with ionization radiation produces several other chemical effects such as degradation, crosslinking, and co-polymerization, along with the desired grafting reaction in the presence of monomer [27].…”