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Yamaki, Tetsuya*; Nuryanthi, N.*; Kitamura, Akane; Koshikawa, Hiroshi*; Sawada, Shinichi*; Voss, K.-O.*; Severin, D.*; Tautmann, C.*
Nuclear Instruments and Methods in Physics Research B, 435, p.162 - 168, 2018/11
Times Cited Count：8 Percentile：62.99(Instruments & Instrumentation)We used individual single-ion tracks in fluoropolymers with diameters of tens to hundreds of nanometers; chemical etching and ion-track grafting enabled us to develop ion-track and proton-conductive membranes, respectively. In the ion-track membranes of PVDF, strongly-LET-dependent etching was found, so the pore shape as well as the size was exclusively controlled by the track structures. We performed the ion-track grafting of styrene into ETFE to develop nanostructure-controlled proton exchange membranes (PEMs) for applications in PEM fuel cells. Our ion beam technology to develop fluoropolymer-based nanostructures has the potential to apply in the field of filtration processes and fuel cell devices. This would make it possible to provide new microfiltration technology for water treatment, sterilization, petroleum refining and dairy processing.
Yamaki, Tetsuya*; Goto, Mitsuaki*; Sawada, Shinichi*; Koshikawa, Hiroshi*; Kitamura, Akane; Higa, Mitsuru*
QST-M-8; QST Takasaki Annual Report 2016, P. 35, 2018/03
We prepared ion exchange membranes by a heavy-ion-track grafting method, and then used them for seawater concentration process. Both the water uptake and resistance were lower for our ion-track grafted membranes than for the conventional 
-ray-grafted membranes. The results would be because local and high-density energy deposition due to the ion beam enabled us to control the membrane structure in a nanometer scale. We demonstrate our membranes are suitable for this application.
Onuki, Kaoru; Hwang, G.; Shimizu, Saburo
Journal of Membrane Science, 175(1), p.171 - 179, 2000/07
no abstracts in English
Onuki, Kaoru; Hwang, G.; Shimizu, Saburo
Maku Shimpojium '99 Hobunshu, (11), p.37 - 40, 1999/00
no abstracts in English
Oishi, Tetsuya; Yoshida, Makoto; Mizugaki, Toshio; Sugo, Takanobu
IRPA9: 1996 International Congress on Radiation Protection, Proceedings, 3, p.44 - 46, 1996/00
no abstracts in English
Y.C.Nho*; Sugo, Takanobu; *; Makuuchi, Keizo
Journal of Applied Polymer Science, 51(7), p.1269 - 1275, 1994/02
Times Cited Count：17 Percentile：60.6(Polymer Science)no abstracts in English
Yoshida, Makoto; Murakami, Hiroyuki;
Journal of Nuclear Science and Technology, 30(4), p.333 - 338, 1993/04
Times Cited Count：1 Percentile：18.76(Nuclear Science & Technology)no abstracts in English
Kobunshi No Bimu Kako, p.245 - 254, 1987/00
no abstracts in English
Omichi, Hideki; D.Chundury*; V.T.Stannett*
Journal of Applied Polymer Science, 32(5), p.4827 - 4836, 1986/00
Times Cited Count：22 Percentile：74.09(Polymer Science)no abstracts in English
; ; ; ;
Radioisotopes, 34(9), p.497 - 500, 1985/00
no abstracts in English
;
J.Appl.Polym.Sci., 30, p.1277 - 1284, 1984/00
Times Cited Count：18 Percentile：70.44(Polymer Science)no abstracts in English
,
,-trifluoroacrylate;
Journal of Polymer Science; Polymer Chemistry Edition, 20, p.1559 - 1568, 1982/00
no abstracts in English
; *; ; Machi, Sueo
Polym.J., 10(5), p.513 - 519, 1978/05
Times Cited Count：48no abstracts in English
; ; *
Nihon Genshiryoku Gakkai-Shi, 2(8), P. 460, 1960/00
no abstracts in English
;
Dai-2-Kai Genshiryoku Shimpojiumu Hobunshu, P. 63, 1958/00
no abstracts in English
Kodaira, Takahide*; Ikeda, Ayumi*; Matsuyama, Emi*; Kono, Nobuho*; Oura, Kotone*; Sawada, Shinichi; Yamaki, Tetsuya; Nomura, Mikihiro*
no journal, ,
In the thermochemical water splitting IS process, the Bunsen reaction (SO
+ I + 2HO = HSO
+ 2HI) needs to be achieved in an electrochemical cell with an ion exchange membrane. As part of an ongoing JST-ALCA project, therefore, we developed ion exchange membranes for this reaction by radiation-induced graft polymerization, investigating their water permeation properties by the pervaporation method. Our membrane preparation involves the -ray-induced grafting of styrene and divinylbenzene into poly(ethylene-
-tetrafluoroethylene) films and the subsequent sulfonation. Water permeate flux values at 25
C were 7.4 and 19 kg/m
h through the grafted membrane and Nafion 212 at the same water uptake (37%), respectively.
Chen, J.; Asano, Masaharu; Maekawa, Yasunari
no journal, ,
Electrodialysis is an electrochemical process mainly used for the isolation and concentration of ionic species from aqueous solution. In this study, we develop radiation grafting polymeric ion exchange membranes for application in electrodialysis to remove metal ions in water. Two monomers of styrene derivatives, ethyl styrenesulfonate (ETSS) and chloromethyl styrene (CMS), were grafted onto poly(ethylene-co-tetrafluoroethylene) (ETFE) films by the radiation induced graft polymerization. The ETSS- and CMS-grafted films were easily converted into cation and anion exchange membranes, respectively. The resultant membranes showed similar range of ion exchange capacity (IEC), but the conductivity of the cation exchange membranes was higher than that of the anion exchange membranes with the same IEC level. Furthermore, the membranes with high IEC got the high electrodialysis speed, while those with low IEC had the high removal percent.
