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Takasaki Institute for Advanced Quantum Science

Publications - Nanostructured Polymer Material

Update:2024年4月9日更新
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Publications

2024

  1. Direct observation of radiation-induced graft polymerization on a polyethylene film.
    Motegi,T., Omichi, M., Maekawa, Y., Seko, N.
    Rad. Phys. Chem.214, 111281 (2024).
  2. Effect of High-Dose Electron Beam Irradiation on Thermal Decomposition Behavior of Polytetrafluoroethylene (Ptfe) and Its Component Analysis.
    Yu, H., Idesaki, A., Hiroki, A., Hasegawa, S., Hirota, K., Maekawa, Y.
    Rad. Phys. Chem. 216, 111435 (2024). 
  3. The Effects of Functional Graft Polymers on Phase Separation and Ion-channel Structures in Anion Exchange Membranes  Analyzed by Sans  Partial Scattering   Function.
    Yoshimura, K., Hiroki, A., Radulescu, A., Noda, Y., Koizumi, S., Zhao, Y., Maekawa, Y.
    Macromolecules 57, 1998-2007 (2024).
  4. Toward the Design of Graft-type Proton Exchange Membranes with High Proton Conductivity and Low Water Uptake:A Machine Learning Study.
    Sawada, S., Sakamoto, Y., Funatsu, K., Maekawa, Y.
    J. Membr. Sci. 692, 122169 (2024). 

2023

  1. Extended Q-range Small-angle Neutron Scattering to Understand the Morphology of Proton-exchange Membranes: the Case of the Functionalized Syndiotactic-   polystyrene Model System.
    Schiavone, M., Lamparelli, D., Daniel, C., Zhao, Y., Iwase, H., Arima-Osonoi, H., Tanaka, S., Radulescu, A.
    J. Appl. Cryst. 56, 947-960 (2023).
  2. Microscopic Determination of the Local Hydration Number of Polymer Electrolyte Membranes Using Sans Partial Scattering Function Analysis.
    Zhao, Y., Yoshimura, K., Sawada, S., Hiroki, A., Radulescu, A., Maekawa, Y.
    Acs Macro Letters 12, 481-486 (2023). 
  3. Development of Environmentally Friendly Soft Contact Lenses Made from Cellulose-derived Hydrogen Materials.
    Hiroki, A., Kimura, A., Taguchi, M.
    Rad. Phys. Chem. 213, 111257 (2023). 

2022

  1. Morphological characterization of grafted polymer electrolyte membranes at a surface layer for fuel cell application.
    Lam Hoang Hao, Tran Duy Tap,* Dinh Tran Trong Hieu, Ekaterina Korneeva, Nguyen Van Tiepd, Kimio Yoshimura, Shin Hasegawa, Shin-ichi Sawada, Tran Van Manb, Nguyen Quang Hung, Luu Anh Tuyend, Van-Phuc Dinh, Le Quang Luan, Yasunari Maekawa.
    J. Appl. Polym. Sci., 139, 51901 (2022). 
  2. On the proton conduction pathways in polyelectrolyte membranes based on syndiotactic-polystyrene.
    Lam Hoang Hao, Tran Duy Tap,* Dinh Tran Trong Hieu, Ekaterina Korneeva, Nguyen Van Tiepd, Kimio Yoshimura, Shin Hasegawa, Shin-ichi Sawada, Tran Van Manb, Nguyen Quang Hung, Luu Anh M. Schiavone, Y. Zhao, H. Iwase, H. Arima-Osonoi, S. Takata, A. Radulescu.
    Membranes, 12, 143 (2022). 
  3. Unique Structural Characteristics of Graft-Type Proton Exchange Membranes using SANS Partial Scattering Function Analysis.
    Y. Zhao, K. Yoshimura, S. Sawada, T. Motegi, A. Hiroki, A. Radulescu, and Y. Maekawa.
    Macromolecules, 55, 7100-7109 (2022).
  4. Direct Observation and Semiquantitative Analysis of Hierarchical Structures in Graft-Type Polymer Electrolyte Membranes Using the AFM Technique.
    T. Motegi, K. Yoshimura, Y. Zhao, A. Hiroki, and Y. Maekawa.
    Langmuir, 38, 9992-9999 (2022).

2021

  1. Alkaline fuel cells consisting of imidazolium-based graft-type anion exchange membranes: Optimization of fuel cell conditions to achieve high performance and durability.
    A. M. A. Mahmoud, K. Yoshimura, and Y. Maekawa.
    J. Membr. Sci., 620, 118844 (2021).
  2. Mechanistic study on radiation-induced grafting into fluorinated polymer solid films using a swelling-induced detachment of grafted polymers.
    Beom-Seok Ko, K. Yoshimura, A. Hiroki, and Y. Maekawa.
    J. Polym. Sci., 59, 108-116 (2021). 
  3. Radiation-Induced Asymmetric Grafting of Different Monomers into Base Films to Prepare Novel Bipolar Membranes.
    S. Sawada and Y. Maekawa.
    Molecules, 26, 2028 (2021). 
  4. Physical Properties and Reactivity of Microdomains in Phosphatidylinositol-Containing Supported Lipid Bilayer.
    T. Motegi, K. Takiguchi, Y. Tanaka-Takiguchi, T. Itoh, and R. Tero.
    Membranes, 11, 339 (2021). 
  5. Three-Component Domains in the Fully Hydrated Nafion Membrane Characterized by Partial Scattering Function Analysis.
    Y. Zhao, K. Yoshimura, T. Motegi, A. Hiroki, and Y. Maekawa.
    Macromolecules, 54, 4128-4135 (2021). 
  6. Coarse-grained molecular dynamics simulation to reproduce phase-separated structures in graft-type polymer electrolyte membranes.
    S. Okushima, S. Hasegawa, T. Kawakatsu, and Y. Maekawa.
    Polymer, 230, 124036 (2021). 
  7. Synthesis and Characterization of 4-Vinylimidazolium/Styrene-Cografted Anion-Conducting Electrolyte Membranes.
    T. Hamada, K. Yoshimura, K. Takeuchi, S. Watanabe, Y. Zhao, A. Hiroki, T. Hagiwara, H. Shishitani, S. Yamaguchi, H. Tanaka, A. Radulescu, K. Ohwada and Y. Maekawa.
    Macromol. Chem. Phys., 222, 2100028 (2021). 
  8. Hydrophobic Effect on Alkaline Stability of Graft Chains in Ammonium-type Anion Exchange Membranes Prepared by Radiation-Induced Graft Polymerization.
    T. Hamada, Y. Zhao, K. Yoshimura, A. Radulescu, K. Ohwada and Y. Maekawa.
    ChemistrySelect, 6, 8879-8888 (2021). 

2020

  1. A long side chain imidazolium-based graft-type anion-exchange membrane: novel electrolyte and alkaline-durable properties and structural elucidation using SANS contrast variation.
    Y. Zhao, K. Yoshimura, A. M. S. Mahmoud, H. C. Yu, S. Okushima, A. Hiroki, Y. Kishiyama, H. Shishitani, S. Yamaguchi, H. Tanaka, Y. Noda, S. Koizumi, A. Radulescu, and Y. Maekawa.
    Soft Matter, 16, 8218-8143 (2020).
  2. Responsive Amorphous Photonic Structures of Spherical/Polyhedral Colloidal Metal‒Organic Frameworks.
    L. Bai, Y. He, J. Zhou, Y. Lim, V-C. Mai, Y. Chen, S. Hou, Y. Zhao, J. Zhang, and H. Duan.
    Advanced Optical Materials, 7, 1900522 (2019). 
  3. Hierarchical structure of microbial cellulose and marvelous water uptake, investigated by combining neutron scattering instruments at research reactor JRR-3, Tokai.
    S. Koizumi, Y. Zhao, and A. Patra.
    Polymer, 176, 244-255 (2019). 
  4. SAXS investigation on morphological change in lamellar structures during propagation steps of graft-type polymer electrolyte membranes for fuel cell applications.
    T.D. Tap, L.L. Nguyen, Y. Zhao, S. Hasegawa, S. Sawada, N.Q. Hung, L.A. Tuyen, and Y. Maekawa.
    Macromolecular Chemistry and Physics, 221, 1900325 (2020). 
  5. Thermally stable graft-type polymer electrolyte membranes consisting based on poly (ether ether ketone) and crosslinked graft-polymers for fuel cell applications.
    S. Hasegawa, A. Hiroki, Y. Ohta, N. Iimura, A. Fukaya, and Y. Maekawa.
    Radiation Physics and Chemistry, 171, 108647 (2020).
  6. Development of Hydrogen-Permselective Porous Membranes Using Radiation-Induced Graft Polymerization.
    S. Hasegawa, S. Sawada, S. Azami, T. Hagiwara, A. Hiroki, and Y. Maekawa.
    Quantum Beam Science, 4, 23 (2020). 
  7. Quantum Beams Applying to Innovative Industrial Materials.
    Y. Maekawa and M. Washio.
    Quantum Beam Science, 4, 27 (2020). 
  8. Overvoltage reduction in membrane Bunsen reaction for hydrogen production by using a radiation-grafted cation exchange membrane and porous Au anode.
    S. Sawada, T. Kimura, H. Nishijima, T. Kodaira, N. Tanaka, S. Kubo, S. Imabayashi, M. Nomura, T. Yamaki.
    International Journal of Hydrogen Energy, 45, 13814 (2020). 
  9. Internal and interfacial structure analysis of graft-type fluorinated polymer electrolyte membrane by small angle X-ray scattering in the high-q range.
    T. D. Tap, L. L. Nguyen, S. Hasegawa, S. Sawada, L. Q. Luan, and Y. Maekawa.
    J. Appl. Polym. Sci., 137, 49029 (2020).
  10. The Effects of Temperature and Humidity on the Microstructure of Sulfonated Syndiotactic–polystyrene Ionic Membranes.
    M. M. Schiavone, D. H. Lamparelli, Y. Zhao, F. Zhu, Z. Revay, and A. Radulescu.
    Membranes, 10, 00187 (2020).

2019

  1. Basicity-dependent properties of anion conducting membranes consisting of iminium cations for alkaline fuel cells
    Beom-Seok Ko, K. Yoshimura, S. Warapon, H. Shishitani, S. Yamaguchi, H. Tanaka, and Y. Maekawa
    J. Polym. Sci. A, Polym. Chem., 57, 503-510 (2019)
  2. Alkaline durable 2-methylimidazolium-containing anion-conducting electrolyte membranes prepared by radiation induced grafting for direct hydrazine hydrate fuel cells
    K. Yoshimura, A. Hiroki, H. C. Yu, Y. Zhao, H. Shishitani, S. Yamaguchi, H. Tanaka, and Y. Maekawa
    J. Membr. Sci., 573, 403-410 (2019)
  3. Imidazolium-Based Anion Exchange Membranes for Alkaline Anion Fuel Cells: Interplay between Morphology and Anion Transport Behavior
    Y. Zhao, K. Yoshimura, H. Takamatsu, A. Hiroki, Y. Kishiyama, H. Shishitani, S. Yamaguchi, H. Tanaka, S. Koizumi, A. Radulescu, M. Appavou, and Y. Maekawa
    Journal of The Electrochemical Society, 166, F472-F478 (2019)
  4. 高エネルギー重イオンビームによる海水濃縮用カチオン, アニオン交換膜の開発
    澤田真一、安川政宏、越川 博、喜多村茜、比嘉 充、八巻徹也
    日本海水学会誌, 73, 208-216 (2019)

2018

  1. PEEKをベースとしたグラフト型電解質膜の電気化学装置への適用
    深谷敦子、太田優子、飯村伸明、立野 晃、高橋克巳、前川康成
    化学工業, 69, 52-57 (2018)
  2. Small angle neutron scattering study on the morphology of imidazolium-based grafted anion-conducting fuel cell membranes
    Y. Zhao, K. Yoshimura, H. C. Yu, Y. Maekawa, A. Hiroki, Y. Kishiyama, H. Shishitani, S. Yamaguchi, H. Tanaka, S. Koizumi, M. Appavou, J. Houston, A. Radulescu, and D. Richter
    Physica B, 551, 203-207 (2018)
  3. Application of graft-type poly(ether ether keton)-based polymer electrolyte membranes to electrochemical devices – Fuel cells and electrolytic enrichment of tritium
    A. Fukaya, A. Tateno, N. Iimura, Y. Ohta, K. Takahashi, T. Sodekoda, K. Suzuki, H. Takahashi, S. Hasegawa, A. Hiroki, and Y. Maekawa
    International Journal of Hydrogen Energy, 43, 8927-8935 (2018)
  4. Temperature effects on mechanical properties and conductivity of graft-type polymer electrolyte membrane
    T. D. Tap, D. D. Khiem, L. L. Nguyen, N. Q. Hien, L. Q. Luan, P. B. Thang, S. Sawada, S. Hasegawa, and Y. Maekawa
    Radiat. Phys. Chem., 151, 186-191 (2018)
  5. Synthesis and Characterization of Aniline-Containing Anion-Conducting Polymer Electrolyte Membranes by Radiation-Induced Graft Polymerization
    T. Hamada, K. Yoshimura, A. Hiroki, and Y. Maekawa
    J. Appl. Polym. Sci., 135, 46886 (2018).
  6. Reverse relationships of water uptake and alkaline durability with hydrophilicity of imidazolium-based grafted anion-exchange membranes
    K. Yoshimura, Y. Zhao, A. Hiroki, Y. Kishiyama, H. Shishitani, S. Yamaguchi, H. Tanaka, S. Koizumi, J. E. Houston, A. Radulescu, M. Appavou, D. Richter, and Y. Maekawa
    Soft Matter, 14, 9118-9831 (2018)

2017

  1. Block-type proton exchange membranes prepared by a combination of radiation-induced grafting and atom-transfer radical polymerization
    S. Sawada, S. Hasegawa, Y. Zhao, and Y. Maekawa
    J. Membr. Sci., 532, 105-114 (2017)
  2. Control of Radiation/Living Graft Polymerization in the Solid State
    T. Hamada, S. Hasegawa, and Y. Maekawa
    Macromol. Chem. Phys., 218, 1700346 (2017)
  3. Imidazolium-Based Anion Exchange Membranes for Alkaline Anion Fuel Cells: (2) Elucidation of the Ionic Structure and its Impact on Conducting Properties
    K. Yoshimura, Y. Zhao, S. Hasegawa, A. Hiroki, Y. Kishiyama, H. Shishitani, S. Yamaguchi, H. Tanaka, S. Koizumi, M. Appavou, A. Radulescu, D. Richter, and Y. Maekawa
    Soft Matter, 13, 8463-8473 (2017)
  4. アルカリ型燃料電池用アニオン伝導電解質膜の開発
    吉村公男、前川康成
    Isotope News, 754, 32-35 (2017)
  5. Alkaline Durable Anion-Conducting Electrolyte Membranes Prepared by Radiation Induced Grafting of 2-Methyl-4-vinylimidazole for Non-Platinum Direct Hydrazine Hydrate Fuel Cells
    Y. Maekawa, K. Yoshimura, K. Takeuchi, A. Hiroki, S. Watanabe, T. Hagiwara, H. Shishitani, S. Yamaguchi, and H. Tanaka
    ECS Transactions, 80, 979-987 (2017)

2016

  1. Phase Behavior and Li+ Ion Conductivity of Styrene-Ethylene Oxide Multiblock Copolymer Electrolytes
    J. Sarapas, K. Saijo, Y. Zhao, R. Hayward, M. Takenaka, G. Tew
    Polymers for Advanced Technologies, 27, 946-954 (2016)
  2. Dispersing zwitterions into comb polymers for non-viral transfection: An integrated experimental and molecular simulation study
    F. Ghobadi, R. Letteri, S. S. Parelkar, Y. Zhao, D. Chan-Seng, T. Emrick, A. Jayaraman
    Biomacromolecules, 17, 546-557 (2016)
  3. Imidazolium-Based Anion Exchange Membranes For Alkaline Anion Fuel Cells: Elucidation of the Morphology and the Interplay Between Morphology and Properties
    Y. Zhao, K. Yoshimura, H. Shishitani, S. Yamaguchi, H. Tanaka, S. Koizumi, N. Szekely, A. Radulescu, D. Richter, Y. Maekawa
    Soft Matter, 12, 1567-1578 (2016)
  4. Elucidation of the morphology of the hydrocarbon multi-block copolymer electrolyte membranes for proton exchange fuel cells
    Y. Zhao, M. Yoshida, T. Oshima, S. Koizumi, M. Rikukawa, N. Szekely, A. Radulescu, D. Richter
    Polymer, 88, 157-167 (2016)
  5. Hard-sphere model analysis on the morphology of polymer electrolyte membranes partially swollen in water
    Y. Zhao, M. Yoshida, T. Oshima, S. Koizumi, M. Rikukawa, N. Szekely, A. Radulescu, D. Richter
    Data in Brief, 7, 599-603 (2016)

2015

  1. Fabrication of hard-coated optical absorbers with microstructured surface using etched ion tracks: Toward broadband ultra-low reflectance
    K. Amemiya, H. Koshikawa, T. Yamaki, Y. Maekawa, H. Shitomi, T. Numata, K. Kinoshita, M. Tanabe and D. Fukuda
    Nucl. Instr. Meth. B, 356-357, 154-159 (2015)
  2. Effect of citrate-based non-toxic solvents on poly(vinylidene fluoride) membrane preparation via thermally induced phase separation
    S. Sawada, C. Ursino, F. Galiano, S. Simone, E. Drioli and A. Figoli
    J. Membr. Sci., 493, 232-242 (2015)
  3. Poly(ether ether ketone) (PEEK)-based graft-type polymer electrolyte membranes having high crystallinity for high conducting and mechanical properties at various humidified conditions
    T. Hamada, S. Hasegawa, H. Fukasawa, S. Sawada, H. Koshikawa, A. Miyashita and Y. Maekawa
    J. Mater. Chem. A, 3, 20983-20991 (2015)
  4. Combining small-angle and intermediate-angle neutron scattering to study the hierarchical structure in microbial cellulose
    Y. Zhao, S. Koizumi
    Eur. Polym. J, 66, 437-443 (2015)

2014

  1. Cation and anion exchange membranes prepared by radiation-induced graft polymerization for application in electrodialysis
    J. Chen, M. Asano, Y. Maekawa
    Adv. Mater. Res., 881-883, 1157-1160 (2014)
  2. Affinity of ion-exchange membranes for HI-I2-H2O mixture
    N. Tanaka, T. Yamaki, M. Asano, T. Terai and K. Onuki
    J. Membr. Sci., 456, 31-41 (2014)
  3. Hierarchical Structure-Property Relationships in Graft-Type Fluorinated Polymer Electrolyte Membranes Using Small- and Ultrasmall-Angle X-ray Scattering Analysis
    T. D. Tap, S. Sawada, S. Hasegawa, K. Yoshimura, Y. Oba, M. Ohnuma, Y. Katsumura and Y. Maekawa
    Macromolecules, 47, 2373-2383 (2014)
  4. Imidazolium cation based anion-conducting electrolyte membranes prepared by radiation induced grafting for direct hydrazine hydrate fuel cells
    K. Yoshimura, H. Koshikawa, T. Yamaki, H. Shishitani, K. Yamamoto, S. Yamaguchi, H. Tanaka and Y. Maekawa
    J. Electrochem. Soc., 161, F889-F893 (2014)
  5. Immobilization of 1-allyl-2-thiourea onto poly(styrene-co-divinylbenzene) gel by γ-ray irradiation and adsorption properties of zinc bis dimethyldithiocarbamate
    S. Mishima and M. Asano
    Jpn. J. Polymer Sci. Technol., 71, 352-360 (2014)

2013

  1. Location and size of nanoscale free-volume holes in crosslinked-polytetrafluoroethylene-based graft-type polymer electrolyte membranes determined by positron annihilation lifetime spectroscopy
    S. Sawada, A. Yabuuchi, M. Maekawa, A Kawasuso, Y. Maekawa
    Radiat. Phys. Chem., 87, 46-52 (2013)
  2. Nanoparticle Formation by Tungsten Ion Implantation in Grassy Carbon
    S. Kato, T. Yamaki, S. Yamamoto, T. Hakoda, K. Kawaguchi, T. Kobayashi, A. Suzuki, T. Terai
    Trans. Mater. Res. Soc. Jpn, 38, 81-84 (2013)
  3. Ion-track Membranes of Poly(vinyliden fluoride):Etching Characteristic During Conductomeric Analysis
    N. Nuryanthi, T. Yamaki, H. Koshikawa, M. Asano, S. Sawada, S. Hasegawa, Y. Maekawa, Y. Katsumura
    Trans. Mater. Res. Soc. Jpn, 38, 105-108 (2013)
  4. Crystal Morphology-Dependent Graft Polymerization in Poly(ether ether ketone)films
    S. Hasegawa, S. Takahashi, H. Iwase, S. Koizumi, M. Ohnuma, Y. Maekawa
    Polymer, 54, 2895-2900 (2013)
  5. Polymerization Mechanism for Radiation-Induced Grafting of Styrene into Alicyclic Polyimide Films for Preparation of Polymer Electrolyte Membrane
    J. Park, K. Enomoto, T. Yamashita, Y. Takagi, K. Todaka, Y. Maekawa
    J. Membr. Sci., 438, 1-7 (2013)
  6. Nanoscale structures of radiation-grafted polymer electrolyte membranes investigated via a small-angle neutron scattering technique
    S. Sawada, D. Yamaguchi, A. Putra, S. Koizumi, Y. Maekawa
    Polymer Journal, 45, 797-801 (2013)
  7. Effect of salt-containing filter paper attached to osmotic membrane
    K. Sano, A. Yamada, A. Matsui, H. Tsuji, S. Hasegawa, S. Sawada, Y. Maekawa
    Desalination, 324, 34-36 (2013)
  8. Graft-type polymer electrolyte membranes for fuel cells prepared by radiation-induced graft polymerization into alicyclic polybenzimidazoles
    J. Park, T. Takayama, M. Asano, Y. Maekawa, K. Kudo
    Polymer, 54, 4570-4577 (2013)
  9. Poly(ethylene-co-tetrafluoroethylene) (ETFE)-based graft-type polymer electrolyte membranes with different ion exchange capacities: Relative humidity dependence for fuel cell applications
    T. D. Tran, S. Sawada, S. Hasegawa, Y. Katsumura, Y. Maekawa
    J. Membr. Sci., 447, 19-25 (2013)
  10. Counter Anion Effect on the Properties of Anion-Conducting Polymer Electrolyte Membranes Prepared by Radiation-induced Graft Polymerization
    H. Koshikawa, K. Yoshimura, W. Sinnananchi, T. Yamaki, M. Asano, K. Yamamoto, S. Yamaguchi, H. Tanaka, Y. Maekawa
    Macromol. Chem. Phys., 214, 1756-1762 (2013)
  11. Preparation of Tungsten Carbide Nanoparticles by Ion Implantation and Electrochemical Etching
    S. Kato, T. Yamaki, S. Yamamoto, T. Hakoda, K. Kawaguchi, T. Kobayashi, A. Suzuki, T. Terai
    Nucl. Instrum. Method Phys. Res. B, 314, 149-152 (2013)
  12. Applied-Voltage Dependence on Conductometric Track Etching of Poly(vinylidene fluoride) Films
    N. Nuryanthi, T. Yamaki, H. Koshikawa, M. Asano, S. Sawada, S. Hasegawa, Y. Maekawa, Y. Katsumura
    Nucl. Instrum. Method Phys. Res. B, 314, 95-98 (2013)
  13. Ion-Track Membranes of Fluoropolymers: Toward Controlling the Pore Size and Shape
    T. Yamaki, N. Nuryanthi, H. Koshikawa, M. Asano, S. Sawada, T. Hakoda, Y. Maekawa, K.-O. Voss, D. Severin, T. Seidl, C. Trautmann, R. Neumann
    Nucl. Instrum. Method Phys. Res. B, 314, 77-81 (2013)
  14. Use of Gafchromic films to measure the transverse intensity distribution of a large-area ion beam
    Y. Yuri, T. Ishizaka, T. Yuyama, I. Ishibori, S. Okumura, A. Kitamura, T. Yamaki and S. Sawada
    Proceedings of 1st International Beam Instrumentation Conference (IBIC 2012) (Internet), 531-533 (2013)

2012

  1. Synthesis of Copolymer Grafts Containing Sulfoalkyl and Hydrophilic Groups in Polymer Electrolyte Membranes
    K. Enomoto, S. Takahashi, R. Rohani, Y. Maekawa
    J. Membr. Sci., 415-416, 36-41 (2012)
  2. Novel Characterization Method for Graft Polymer Structures Chemically Attached on Thermally Stable Polymer Films
    K. Enomoto, S. Takahashi, Y. Maekawa
    Macromol. Chem. Phys., 213, 72-78 (2012)
  3. Hierarchical Structure Analysis of Graft-Type Polymer Electrolyte Membranes Consisting of Cross-Linked Polytetrafluoroethylene by Small-Angle Scattering in a Wide-Q Range
    H. Iwase, S. Sawada, T. Yamaki, S. Koizumi, M. Ohnuma and Y. Maekawa
    Macromolecules, 45, 9121-9127 (2012)
  4. Alkaline durable anion exchange membranes based on graft-type fluoropolymer films for hydrazine hydrate fuel cell
    K. Yoshimura, H. Koshikawa, T. Yamaki, Y. Maekawa, K. Yamamoto, H. Shishitani, K. Asazawa, S. Yamaguchi, H. Tanaka
    ECS Transactions, 50, 2075-2081 (2012)
  5. Effect of temperature on electro-electrodialysis of HI-I2-H2O mixture using ion exchange membranes
    N. Tanaka, T. Yamaki, M. Asano, Y. Maekawa, T. Terai, K. Onuki
    J. Membr. Sci., 411-412, 99-108 (2012)
  6. Investigation of nanopore evolution in track-etched poly(vinylidene fluoride) membranes
    T. Yamaki, N. Nuryanthi, H. Koshikawa, M. Asano, S. Sawada, S. Hasegawa, Y. Maekawa, K.-O. Voss, C. Trautmann, R. Neumann
    Transactions of the Materials Research Society of Japan, 37, 223-226 (2012)
  7. Membrane performance on electro-electrodialysis of HI-I2-H2O mixture for IS process
    N. Tanaka, T. Yamaki, M. Asano, T. Terai, K. Onuki
    Proceedings of 6th International Topical Meeting on High Temperature Reactor Technology (HTR 2012) (USB Flash Drive), 1-6 (2012)

2011

  1. Radiation Processing of Polymers and Its Applications
    M.Tamada, Y. Maekawa
    Charged Particles and Photon Interactions with Matter, Chap. 27, Y. Hatano, Y. Katsumura, and A. Mozumder (Eds.), CRC Press, Boca Raton, 737-759 (2011)
  2. Preirradiation graft polymerization of styrene in a poly(tetrafluoroethylene) film, investigated by time-resolved small-angle neutron scattering
    H. Iwase, S. Sawada, T. Yamaki, Y. Maekawa, S. Koizumi
    Int. J. Polym. Sci., 2011, 301807 (2011)
  3. Water diffusion in fluoropolymer-based fuel-cell electrolyte membranes investigated by radioactivated-tracer permeation technique
    S. Sawada, T. Yamaki, M. Asano, A. Suzuki, T. Terai, Y. Maekawa
    Proc. Radiochim. Acta, 1, 409-413 (2011)
  4. Proton Conduction Characteristics in Radiation-Grafted Polymer Electrolyte Membranes Based on Perfluorinated and Aromatic Hydrocarbon Polymers
    S. Sawada, Y. Maekawa
    ECS Trans., 41, 2125-2133 (2011)
  5. Degradation Manner of Polymer Grafts Chemically Attached on Thermally Stable Polymer Films: Swelling-Induced Detachment of Hydrophilic Grafts from Hydrophobic Polymer Substrates in Aqueous Media
    K. Enomoto, S. Takahashi, T. Iwase, T. Yamashita, Y. Maekawa
    J. Mater. Chem., 21, 9343-9349 (2011)
  6. Radiation-Induced Graft Polymerization of Functional Monomer into Poly(ether ether ketone) Film and Structure-Property Analysis of the Grafted Membrane
    S. Hasegawa, S. Takahashi, H. Iwase, S. Koizumi, N Morishita, K. Sato, T. Narita, M. Ohnuma, Y. Maekawa
    Polymer, 52, 98-106 (2011)
  7. Conductometric Analysis for the Formation of Poly(vinylidene fluoride)-Based Ion Track Membranes
    T. Yamaki, N. Nunung, H. Koshikawa, M. Asano, S. Sawada, S. Hasegawa, Y. Maekawa, K.-O. Voss, C. Trautmann, R. Neumann
    ECS Trans., 35, 1-12 (2011)

2010

  1. Electron-Beam-Induced Chromism Combined with Photo- or Thermal Reverse Reaction for Color Imaging
    K. Enomoto, Y. Maekawa, S. Takano, M. Iwasaki, T. Narita
    J. Photopolym. Sci. Technol., 23, 217-224 (2010)
  2. Crosslinking and grafting of polyetheretherketone film by radiation techniques for application in fuel cells
    J. Chen, D. Li, H. Koshikawa, M. Asano, Y. Maekawa
    J. Membr. Sci., 362, 488-494 (2010)
  3. Water Transport in Polymer Electrolyte Membranes Investigated by Dissipative Particle Dynamics Simulation
    S. Sawada, T. Yamaki, T. Ozawa, A. Suzuki, T. Teraui, Y. Maekawa
    ECS Trans., 33, 1067-1078 (2010)
  4. TEMPO addition into pre-irradiated fluoropolymers and living-radical graft polymerization of styrene for preparation of polymer electrolyte membranes
    S. Sawada, A. Suzuki, T. Terai, Y. Maekawa
    Radiat. Phys. Chem., 79, 471-478 (2010)
  5. Free-volume structure of fluoropolymer-based radiation-grafted electrolyte membranes investigated by positron annihilation lifetime spectroscopy
    S. Sawada, A. Kawasuso, M. Maekawa, Y. Maekawa
    J. Phys.: Conf. Ser., 225, 012048 (2010)
  6. Quantum Beam Technology: A Versatile Tool for Developing Polymer Electrolyte Fuel-Cell Membranes
    T. Yamaki
    J. Power Sources, 195, 5848-5855(2010)
  7. Poly(vinylidene fluoride)-Based Ion Track Membranes with Different Pore Diameters and Shapes SEM Observation and Conductometric Analysis
    N. Nunung, T. Yamaki, H. Koshikawa, M. Asano, K. Enomoto, S. Sawada, Y. Maekawa, K.-O. Voss, C. Trautmann, R. Neumann,
    Electrochemistry, 78, 146-149 (2010)
  8. Electro-electrodialysis of HI-I2-H2O Mixture Using Radiation-grafted Polymer Electrolyte Membranes
    N. Tanaka, T. Yamaki, M. Asano, Y. Maekawa, K. Onuki
    J. Membr. Sci., 346, 136-142 (2010)

2009

  1. Preparation of PTFE-based fuel cell membranes by combining latent track formation techonolgy with graft polymerization
    M. Yoshida, Y. Kimura, J. Chen, M. Asano, Y. Maekawa
    Radiat. Phys. Chem., 78, 1060-1066 (2009)
  2. Fuel Cell Performance of Multiply-Crosslinked Polymer Electrolyte Membranes Prepared by Two-Step Radiation Technique
    T. Yamaki, S. Sawada, M. Asano, Y. Maekawa, M.Yoshida, L. Gubler, S.A. Guersel, G.G. Scherer
    ECS Trans., 25, 1439-1450 (2009)
  3. Long-Lived Intermediates in Radiation-induced Reactions of Alicyclic Polyimides Films
    Y. Maekawa, J. Park, K. Enomoto, S. Yamashita, Y. Takagi, K. Todaka
    J. Photopolym. Sci. Technol., 22, 285-287 (2009)
  4. Radiation-Induced Graft Polymerization of Styrene into a Poly(ether ether ketone) Film for Preparation of Polymer Electrolyte membranes
    S. Hasegawa, K. Satou, T. Narita, Y. Suzuki, S. Takahashi, N. Morishita, Y. Maekawa
    J. Membr. Sci., 345, 74-80 (2009)
  5. Modification of Ultrathin Polyetheretherketone Film for Application in Direct Methanal Fuel Cells
    J. Chen, Li. D, H.Koshikawa, Zhai M, M.Asano, H.Oku, Y.Maekawa
    J. Membr. Sci., 344, 266-274 (2009)
  6. Amphoteric ion exchange membrane synthesized by radiation-induced graft copolymerization of styrene and dimethylaminoethyl methacrylate into PVDF film for vanadium redox flow battery applications
    J. Qiu, J. Zhang, J. Chen, J. Peng, L. Xu, J. Li, G. Wei
    J. Membr. Sci., 334, 9-15 (2009)
  7. Performance of Vanadium Redox Flow Battery with a Novel Amphoteric Ion Exchange Membrane Synthesized by Two-step Grafting Method
    J. Qiu, M. Zhai, J. Chen, Y. Wang, J. Peng, L. Xu, J. Li, G. Wei
    J. Membr. Sci., 342, 215-220 (2009)
  8. Nano-Particle Materials Prepared From a Synthetic Antigenic Sequence of Plasmodium falciparum Enolase
    H. Oku, K. Yamada, K. Kobayashi, R. Katagai, M. Ashfag, H. Hanaoka, Y. Iida, K. Endou, S. Hasegawa, Y. Maekawa, K. Yano, S. Kanou
    Peptide Science 2008 439-442 (2009)
  9. Thermo-and pH-responsive poly(A-ProOMe)-graft-poly(AAc) membrane for selective separation of metal ions
    S. Hasegawa, H. Oohashi, Y. Maekawa, R. Katagai, M. Yoshida
    Polymer J., 41, 533-540 (2009)
  10. Crosslinker Effect in ETFE-Based Radiation-Grafted Proton Conducting Membranes II.Extended Fuel Cell Operation and Degradation Analysis
    H.B. Youcef, L. Gubler, T. Yamaki, S. Sawada, S.A. Guersel, A. Wokaun, G.G. Scherer
    J. Electrochem. Soc., 156, B532-B539 (2009)
  11. Long-term performance of polyetheretherketone-based polymer electrolyte membrane in fuel cells at 95℃
    J. Chen, M. Zhai, M. Asano, L. Huang, Y. Maekawa
    J. Mater. Sci., 44, 3674-3681 (2009)
  12. Perfluorinated polymer film with functional group prepared by radiation-induced grafting
    M. Zhai, J. Chen, S. Hasegawa, T. Li, H. Oku, Y. Maekawa
    Eur. Polym. J., 45, 1668-1673 (2009)
  13. Polymer electrolyte membranes having sulfoalkyl grafts into ETFE film prepared by radiationinduced copolymerization of methyl acrylate and methyl methacrylate
    T. T. Hanh, S. Takahasi, J. Chen, S. Sawada, Y. Maekawa
    J. Appl. Polym. Sci., 114, 231-237 (2009)
  14. Thermal stability of proton exchange fuel-cell membranes based on crosslinked-polytetrafluoroethylene for membrane-electrode assembly preparation
    S. Sawada, T. Yamaki, S. Kawahito, M. Asano, A. Suzuki, T. Terai, Y. Maekawa
    Polym. Degrad. Stabil., 94. 344-349 (2009)
  15. Synthesis of Fluorinated Polymer Electrolyte Membranes by Radiation Grafting and Atom Transfer Radical Polymerization Techniques
    M. Zhai, J. Chen, S. Hasegawa, Y. Maekawa
    Polymer, 50, 1159-1165 (2009)
  16. Positron annihilation lifetime study of graft-type fluorinated polymer electrolyte membranes
    S. Sawada, A. Kawasuso, M. Maekawa, A. Suzuki, T. Terai, Y. Maekawa
    Mater. Sci. For., 607, 70-72 (2009)
  17. Hydrocarbon proton-conductive membranes prepared by radiation-grafting of styrenesulfonate ontoaromatic polyamide films
    D. Li, J. Chen, M. Zhai, M. Asano, Y. Maekawa, H. Oku, M. Yoshida
    Nucl. Instrum. Meth. B, 267, 103-107 (2009)
  18. Enhancement of Etch Rate for Preparation of Nano-Sized Ion-Track Membranes of Poly(vinylidene fluoride): Effect of Pretreatment and High-LET Beam Irradiation
    R. Rohani, T. Yamaki, H. Koshikawa, S. Takahashi, S. Hasegawa, M. Asano, Y. Maekawa, K-O. Voss, C. Trautmann, R. Numann
    Nucl. Instrum. Meth. B, 267, 554-557 (2009)
  19. Thermally Stable and Anisotropically Conducting Membranes Consisting of Sub-micron Copper Wires in Polyimide Ion Track Membranes
    H. Koshikawa, H. Usui, Y. Maekawa
    J. Membr. Sci., 327, 182-187 (2009)

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