Influence of pre-irradiation atmosphere on the properties of polymer electrolyte membranes prepared using radiation grafting method

Septiani, Upita; Chen, Jin Hua; Asano, Masaharu; Maekawa, Yasunari; Yoshida, Minoru; Kubota, Hitoshi

doi:10.1007/s10853-006-1196-z

Cited by 18 publications

(9 citation statements)

References 12 publications

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“…Therefore, a variety of surface modification methods have been reported for a large number of different applications . Considerable efforts have been made to the modification of PVDF by different methods such as via grafting technology using UV light, gamma and X‐ray irradiation, the ozone method, atom transfer radical polymerization (ATRP), and alkaline treatment . However, there are a number of studies about its usage as proton conducting membranes and only few studies are related with anhydrous PEMs …”

Section: Introductionmentioning

confidence: 99%

Investigation of proton conductivity of anhydrous proton exchange membranes prepared via grafting vinyltriazole onto alkaline-treated PVDF

Sinirlioglu

Müftüoğlu

Gölcük

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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This work uses a simple “grafting through” approach in the preparation of anhydrous poly(vinylidene fluoride) (PVDF)‐g‐PVTri polymer electrolyte membranes (PEMs). Alkaline‐treated PVDF was used as a macromolecule in conjunction with vinyltriazole in the graft copolymerization. The obtained polymer was subsequently doped with triflic acid (TA) at different stoichiometric ratios with respect to triazole units and the anhydrous PEMs (PVDF‐g‐PVTri‐(TA)x) were prepared. All samples were characterized by FTIR and 1H NMR. The composition of PVDF‐g‐PVTri was determined by energy dispersive spectroscopy. Thermal properties of the membranes were examined by thermogravimetric analysis and differential scanning calorimetry. The surface roughness and morphology of the membranes were studied using atomic force microscopy, X‐ray diffraction, and scanning electron microscopy. PVDF‐g‐PVTri‐(TA)3 (C3‐TA3) with a degree of grafting of 47.22% showed a maximum proton conductivity of 0.09 S cm−1 at 150 °C and anhydrous conditions. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 1885–1897

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Section: Introductionmentioning

confidence: 99%

Investigation of proton conductivity of anhydrous proton exchange membranes prepared via grafting vinyltriazole onto alkaline-treated PVDF

Sinirlioglu

Müftüoğlu

Gölcük

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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“…Engineering plastics have become the subject of many studies of developing proton exchange membranes used in fuel cells, which involve polytetrafluoroethylene (PTFE), poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP), poly(tetrafluoroethylene-co-perfluoropropylvinylether) (PFA), poly(ethylene-alt-tetrafluoroethylene) (ETFE), poly(ether ether ketone) (PEEK), and poly(vinylidene fluoride) (PVDF) films. In these studies, the base film was modified via 2 Journal of Chemistry grafting using UV-light, -rays, electron beam, X-ray, and gamma radiation techniques [3,9,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Previously, Asano et al reported on the development of proton-conducting membranes generated by the -ray radiation grafting of styrene and its derivatives onto fluorine-containing base films and subsequent sulfonation [12,15,22,27].…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Proton Conductivity of Vinyltriazole-Grafted PVDF Proton Exchange Membranes Prepared via Photoinduced Grafting

Sezgin

Sinirlioglu

Müftüoğlu

et al. 2014

Journal of Chemistry

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Proton exchange membrane fuel cells (PEMFCs) are considered to be a promising technology for clean and efficient power generation in the twenty-first century. In this study, high performance of poly(vinylidene fluoride) (PVDF) and proton conductivity of poly(1-vinyl-1,2,4-triazole) (PVTri) were combined in a graft copolymer, PVDF-g-PVTri, by the polymerization of 1-vinyl-1,2,4-triazole on a PVDF based matrix under UV light in one step. The polymers were doped with triflic acid (TA) at different stoichiometric ratios with respect to triazole units and the anhydrous polymer electrolyte membranes were prepared. All samples were characterized by FTIR and1H-NMR spectroscopies. Their thermal properties were examined by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). TGA demonstrated that the PVDF-g-PVTri and PVDF-g-PVTri-(TA)x membranes were thermally stable up to 390°C and 330°C, respectively. NMR and energy dispersive X-ray spectroscopy (EDS) results demonstrated that PVDF-g-PVTri was successfully synthesized with a degree of grafting of 21%. PVDF-g-PVTri-(TA)3showed a maximum proton conductivity of6×10-3 Scm−1at 150°C and anhydrous conditions. CV study illustrated that electrochemical stability domain for PVDF-g-PVTri-(TA)3extended over 4.0 V.

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“…On the other hand, the degree of grafting of about 30% can be prepared in a long grafting time when a low pre-irradiation dose was carried out. In the case of longer grafting time, the longer graft chains can be obtained [12][13][14] . In this work, we studied the effect of graft conditions, particularly radiation dose and grafting time on the durability of the sulfonated polystyrene-grafted ETFE polymer electrolyte membranes for fuel cells.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF PRE- Γ-Irradiation DOSE ON THE DURABILITY OF THE SULFONATED ETFE-G-POLYSTYRENE CONDUCTING MEMBRANES

Septiani

Kubota

2012

J.Ris.Kim.

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The influence of pre-γ-irradiation dose on durability of the poly(ethylene-co-tetrafluoroethylene) (ETFE) film-based radiation-grafted polymer electrolyte membrane was investigated. The durability of membrane was found to be strongly influence by γ-ray pre-irradiation dose. The durability was tested in a 3% H 2 O 2 aqueous solution at 60 ο C. The durability of the polymer electrolyte membrane with a degree of grafting of about 30% prepared by lower pre-irradiation dose was more stable than that of the membrane prepared with higher pre-irradiation dose.

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Influence of pre-irradiation atmosphere on the properties of polymer electrolyte membranes prepared using radiation grafting method

Cited by 18 publications

References 12 publications

Investigation of proton conductivity of anhydrous proton exchange membranes prepared via grafting vinyltriazole onto alkaline-treated PVDF

Investigation of proton conductivity of anhydrous proton exchange membranes prepared via grafting vinyltriazole onto alkaline-treated PVDF

An Investigation of Proton Conductivity of Vinyltriazole-Grafted PVDF Proton Exchange Membranes Prepared via Photoinduced Grafting

EFFECT OF PRE- Γ-Irradiation DOSE ON THE DURABILITY OF THE SULFONATED ETFE-G-POLYSTYRENE CONDUCTING MEMBRANES

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