Research activity information

• Fouling-resistant superhydrophobic polyketone membranes modified with fluorine-containing silica for water-in-oil emulsion separation

  Keizo Nakagawa, Tomoki Watanabe, Miki Tabuchi, Muhammad Prayogie Aulia, Ralph Rolly Gonzales, Tooru Kitagawa, Yasunao Okamoto, Pengfei Zhang, Atsushi Matsuoka, Eiji Kamio, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Jan. 2025, Journal of Membrane Science, 713, 123309 - 123309

  [Refereed]

  Scientific journal


• Treatment of high-strength wastewater with coupled flocculation and membrane filtration prior to ammoniacal nitrogen enrichment by osmotically assisted reverse osmosis

  Ralph Rolly Gonzales, Keizo Nakagawa, Susumu Hasegawa, Kazuo Kumagai, Atsushi Matsuoka, Yasunao Okamoto, Zhan Li, Zhaohuan Mai, Tomohisa Yoshioka, Tomoyuki Hori, Hideto Matsuyama

  Elsevier BV, Jan. 2025, Separation and Purification Technology, 352, 128159 - 128159

  [Refereed]

  Scientific journal


• Self‐Aggregation Control of Porphyrin for Enhanced Selective Covalent Organic Network Membranes

  Zheng Wang, Keizo Nakagawa, Kecheng Guan, Mengyang Hu, Zhaohuan Mai, Wenming Fu, Qin Shen, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Tomohisa Yoshioka, Hideto Matsuyama

  Abstract Covalent organic networks (CONs) are considered ideal for precise molecular separation compared with traditional polymer membranes because their pores have a sharp molecular weight cut‐off and a robust structure. However, challenges remain with regard to tuning pores as a prerequisite for facile membrane fabrication to a defect‐free layer. Herein, a highly conjugated amino‐porphyrin is used and exploited its tunable stacking behavior to fabricate porphyrin‐based polyamide CONs with ordered structures through interfacial polymerization with acyl chlorides. Controlling the self‐aggregation behavior of the porphyrin and the conformation of the acyl chlorides can create different covalent networks. Acid‐triggered porphyrin protonation offsets stacking to reduce the pore in the network from mesopore to micropore, enabling selective molecule transport. Furthermore, different acyl chloride ligands are used to control the interlayer bonding in CONs. Accordingly, the tailored pore diameters (0.48–0.78 nm) are confirmed by the molecule rejections with performance stability over 25 days of operation, as well as under various conditions. This study leverages porphyrin chemistry and interfacial polymerization to fabricate a defect‐free CON layer with a significantly lower molecular weight cut‐off (< 330 Da) than previously reported porphyrin‐based membranes (>800 Da). This will pave the way for the development of ideal topological membranes.

  Wiley, Nov. 2024, Small

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Highly selective CO2 permeable double-network ionogel membrane containing 1-ethyl-3-methylimidazolium dicyanamide

  Shengnan He, Eiji Kamio, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Nov. 2024, Journal of Membrane Science, 711, 123200 - 123200

  [Refereed]

  Scientific journal


• Effect of surface hydroxyl group density of support membrane on water permeance of polyamide thin-film composite membrane

  Atsushi Matsuoka, Takefumi Miyake, Keizo Nakagawa, Tomohisa Yoshioka, Eiji Kamio, Hideto Matsuyama

  Lead, Elsevier BV, Oct. 2024, Journal of Membrane Science, 710, 123161 - 123161

  [Refereed]

  Scientific journal


• Practical Osmotic Agent for High-Degree Pharmaceutical Pre-Concentration by Organic Solvent Forward Osmosis.

  Ryoichi Takada, Ryosuke Takagi, Zhaohuan Mai, Atsushi Matsuoka, Hideto Matsuyama

  Pre-concentration can reduce the total production costs in the pharmaceutical industry. Organic solvent forward osmosis (OSFO) is a suitable pre-concentration method because of its nonthermal nature, low capital cost, and potential for achieving high-degree concentrations. In a previous study, we first demonstrated a high-degree OSFO concentration. Sucrose octaacetate (SoA) in MeOH was concentrated to 52 wt% using polyethylene glycol (PEG)-400 as the osmotic agent, but the concentrated solution had a concentration of 17% PEG-400 because of the reverse solute flux. This result does not meet the typical purity standards required for pharmaceutical production, indicating the need to determine a suitable osmotic agent that can be used for practical purposes. This study proposes a practical osmotic agent for OSFO pre-concentration. First, osmotic agents were screened from a practical perspective. Polypropylene glycol (PPG)-400 was selected, owing to its low toxicity, good solubility, and low viscosity. Subsequently, the OSFO concentration was demonstrated using PPG-400 as the osmotic agent. SoA in MeOH was concentrated from 9.4 wt% to 48 wt%. The final feed solution contained only 0.04 wt% PPG-400. This result is the first demonstration of successful pharmaceutical pre-concentration using OSFO that satisfies the typical purity requirement in pharmaceutical production.

  Aug. 2024, Membranes, 14(9) (9), English, International magazine

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Pervaporation dehydration of an isopropanol aqueous solution using microporous TiO2-SiO2-OCL (Organic chelating Ligand) composite membranes prepared under different firing conditions

  Takaya Fujiki, Megumi Kaji, Yuuya Tamamizu, Ryuuki Yasunari, Keizo Nakagawa, Tooru Kitagawa, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama, Tomohisa Yoshioka

  Elsevier BV, Jun. 2024, Separation and Purification Technology, 337, 126249 - 126249

  [Refereed]

  Scientific journal


• Development of a double-network ion gel membrane composed of a CO2-philic ionic liquid, semi-crystalline polymer network, and tetra-armed polyethylene glycol network

  Shengnan He, Eiji Kamio, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Mar. 2024, Journal of Membrane Science, 695, 122482 - 122482

  [Refereed]

  Scientific journal


• Development of an ion gel-based CO₂ separation membrane composed of Pebax 1657 and a CO₂-philic ionic liquid

  Jo Muroga, Eiji Kamio, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Development of a tough gel membrane composed of Pebax 1657 and [Emim][C(CN)₃] (Pebax ion gel membrane) with great CO₂ separation performance.

  Royal Society of Chemistry (RSC), 2024, RSC Advances, 14(29) (29), 20786 - 20796

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Fundamental Investigation on Osmotic Pressure and Phase Behavior of Novel pH-Responsive Draw Solute with Imine-Based Dynamic Covalent Chemistry

  Atsushi Matsuoka, Masayuki Fukushima, Eiji Kamio, Tomohisa Yoshioka, Keizo Nakagawa, Yasunao Okamoto, Hideto Matsuyama

  Lead, American Chemical Society (ACS), Nov. 2023, Industrial & Engineering Chemistry Research, 62(46) (46), 19845 - 19854

  [Refereed]

  Scientific journal


• Hybrid osmotically assisted reverse osmosis and reverse osmosis (OARO-RO) process for minimal liquid discharge of high strength nitrogenous wastewater and enrichment of ammoniacal nitrogen

  Ralph Rolly Gonzales, Keizo Nakagawa, Kazuo Kumagai, Susumu Hasegawa, Atsushi Matsuoka, Zhan Li, Zhaohuan Mai, Tomohisa Yoshioka, Tomoyuki Hori, Hideto Matsuyama

  Elsevier BV, Nov. 2023, Water Research, 246, 120716 - 120716

  [Refereed]

  Scientific journal


• Development of an ion gel membrane containing a CO2-philic ionic liquid in interpenetrating semi-crystalline and crosslinkable polymer networks

  Shengnan He, Eiji Kamio, Jinhui Zhang, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Nov. 2023, Journal of Membrane Science, 685, 121912 - 121912

  [Refereed]

  Scientific journal


• Continuous catalytic reduction of p-nitrophenol confined within two-dimensional nanochannels in laminar MoS2 membranes

  Keizo Nakagawa, Takumi Ueno, Zheng Wang, Tomohisa Yoshioka, Jiri Kulhavy, Keita Taniya, Atsushi Matsuoka, Eiji Kamio, Shik Chi Edman Tsang, Hideto Matsuyama

  Elsevier BV, Oct. 2023, Chemical Engineering Journal, 474, 145671 - 145671

  [Refereed]

  Scientific journal


• The effects of firing temperature and Ti/Si ratio on the H2 permeation characteristics of microporous TiO2-SiO2-organic chelating-ligand composite membranes

  Etsuko Tachi, Tomohisa Yoshioka, Takaya Fujiki, Ryuuki Yasunari, Keizo Nakagawa, Tooru Kitagawa, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

  Elsevier BV, Oct. 2023, Separation and Purification Technology, 322, 124091 - 124091

  [Refereed]

  Scientific journal


• Continuous purification of drugs by ionic liquid-drawn organic solvent forward osmosis and solute recovery

  Jing Li, Ralph Rolly Gonzales, Ryosuke Takagi, Ying-Cheng Chen, Atsushi Matsuoka, Luyao Deng, Hideto Matsuyama

  Abstract Classical purification of pharmaceuticals is energy-intensive and employs toxic solvents that are discarded, calling for more sustainable methods. Here, we purified tetracycline by organic solvent forward osmosis using ionic liquids. Results show the osmotic enrichment of feed solutions containing different concentrations of tetracycline in methanol. The solvent flux during the filtration process is mainly influenced by solvent properties, such as molecular size, viscosity, polarity, and the solvent–membrane interaction. We evaporated the diluted draw solution to recover the draw solute for reuse. Overall ionic liquids appear as suitable draw solutes for organic solvent forward osmosis for pharmaceutical compound enrichment with draw solute recovery and reuse.

  Springer Science and Business Media LLC, Aug. 2023, Environmental Chemistry Letters

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Polyamide composite membrane with 3D honeycomb-like structure via acetone-regulated interfacial polymerization for high-efficiency organic solvent nanofiltration

  Wenming Fu, Luyao Deng, Mengyang Hu, Zhaohuan Mai, Guorong Xu, Yongxuan Shi, Kecheng Guan, Ralph Rolly Gonzales, Atsushi Matsuoka, Hideto Matsuyama

  Elsevier BV, Aug. 2023, Journal of Membrane Science, 679, 121711 - 121711

  [Refereed]

  Scientific journal


• Effects of hydrogen-bonding functional groups of ammonium based-ionic liquids with Tf2N anion on the upper critical solution temperature in aqueous solutions

  Atsushi Matsuoka, Airi Motoyama, Eiji Kamio, Tomohisa Yoshioka, Keizo Nakagawa, Hideto Matsuyama

  Lead, Elsevier BV, Aug. 2023, Journal of Molecular Liquids, 383, 122145 - 122145

  [Refereed]

  Scientific journal


• Organic solvent reverse osmosis characteristics of TiO2-ZrO2-organic chelating ligand (OCL) composite membranes using OCLs with different molecular sizes

  Shunsuke Kitamura, Tomohisa Yoshioka, Keizo Nakagawa, Tooru Kitagawa, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

  Elsevier BV, Jun. 2023, Separation and Purification Technology, 315, 123576 - 123576

  [Refereed]

  Scientific journal


• Two-Dimensional Interlayer Space Induced Horizontal Transformation of Metal-Organic Framework Nanosheets for Highly Permeable Nanofiltration Membranes.

  Zheng Wang, Keizo Nakagawa, Kecheng Guan, Qiangqiang Song, Siyu Zhou, Shunsuke Tanaka, Yasunao Okamoto, Atsushi Matsuoka, Eiji Kamio, Guangchao Li, Molly Meng-Jung Li, Tomohisa Yoshioka, Hideto Matsuyama

  Laminar membranes comprising graphene oxide (GO) and metal-organic framework (MOF) nanosheets benefit from the regular in-plane pores of MOF nanosheets and thus can support rapid water transport. However, the restacking and agglomeration of MOF nanosheets during typical vacuum filtration disturb the stacking of GO sheets, thus deteriorating the membrane selectivity. Therefore, to fabricate highly permeable MOF nanosheets/reduced GO (rGO) membranes, a two-step method is applied. First, using a facile solvothermal method, ZnO nanoparticles are introduced into the rGO laminate to stabilize and enlarge the interlayer spacing. Subsequently, the ZnO/rGO membrane is immersed in a solution of tetrakis(4-carboxyphenyl)porphyrin (H2 TCPP) to realize in situ transformation of ZnO into Zn-TCPP in the confined interlayer space of rGO. By optimizing the transformation time and mass loading of ZnO, the obtained Zn-TCPP/rGO laminar membrane exhibits preferential orientation of Zn-TCPP, which reduces the pathway tortuosity for small molecules. As a result, the composite membrane achieves a high water permeance of 19.0 L m-2  h-1  bar-1 and high anionic dye rejection (>99% for methyl blue).

  Apr. 2023, Small (Weinheim an der Bergstrasse, Germany), e2300672, English, International magazine

  [Refereed]

  Scientific journal


• Influence of structure of porous polyketone microfiltration membranes on separation of water‐in‐oil emulsions

  Tomoki Watanabe, Keizo Nakagawa, Ralph Rolly Gonzales, Tooru Kitagawa, Atsushi Matsuoka, Eiji Kamio, Tomohisa Yoshioka, Hideto Matsuyama

  Wiley, Mar. 2023, Journal of Applied Polymer Science, 140(22) (22)

  [Refereed]

  Scientific journal


• Unveiling the impact of imidazole derivative with mechanistic insights into neutralize interfacial polymerized membranes for improved solute-solute selectivity

  Titik Istirokhatun, Yuqing Lin, Ken Kinooka, Qin Shen, Pengfei Zhang, Yuandong Jia, Atsushi Matsuoka, Kazuo Kumagai, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Feb. 2023, Water Research, 230, 119567 - 119567

  [Refereed]

  Scientific journal


• Regulating interfacial polymerization via a multi-functional calcium carbonate based interlayer for a highly permselective nanofiltration membrane

  Mengyang Hu, Wenming Fu, Kecheng Guan, Ralph Rolly Gonzales, Qiangqiang Song, Atsushi Matsuoka, Zhaohuan Mai, Yu-Hsuan Chiao, Pengfei Zhang, Zhan Li, Hideto Matsuyama

  The CaCO₃ interlayer was grown in situ on PK membrane through mineralization process, which plays a multi-functional role in the process of regulating IP and facilitating the formation of a thinner selective layer with rough and loose structure.

  Royal Society of Chemistry (RSC), 2023, Journal of Materials Chemistry A, 11(16) (16), 8836 - 8844

  [Refereed]

  Scientific journal


• Ammoniacal nitrogen concentration by osmotically assisted reverse osmosis

  Ralph Rolly Gonzales, Keizo Nakagawa, Susumu Hasegawa, Atsushi Matsuoka, Kazuo Kumagai, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Jan. 2023, Journal of Membrane Science, 665, 121122 - 121122

  [Refereed]

  Scientific journal


• Fundamental investigation on the development of composite membrane with a thin ion gel layer for CO2 separation

  Jinhui Zhang, Eiji Kamio, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Elsevier BV, Dec. 2022, Journal of Membrane Science, 663, 121032 - 121032

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• CO2 and temperature dual-responsive dendrimer-based draw solutes for forward osmosis process

  Atsushi Matsuoka, Shihomi Nishimori, Tomoki Takahashi, Eiji Kamio, Tomohisa Yoshioka, Keizo Nakagawa, Hideto Matsuyama

  Lead, Elsevier BV, Oct. 2022, Desalination, 540, 115991 - 115991

  [Refereed]

  Scientific journal


• Organic solvent permeation characteristics of TiO2-ZrO2 composite nanofiltration membranes prepared using organic chelating ligand to control pore size and surface property

  Ryosuke Iesako, Tomohisa Yoshioka, Keizo Nakagawa, Takuji Shintani, Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

  Elsevier BV, Sep. 2022, Separation and Purification Technology, 297, 121458 - 121458

  [Refereed]

  Scientific journal


• HNb3O8/g-C3N4 nanosheet composite membranes with two-dimensional heterostructured nanochannels achieve enhanced water permeance and photocatalytic activity

  Seiji Imoto, Keizo Nakagawa, Chechia Hu, Tomohisa Yoshioka, Takuji Shintani, Atsushi Matsuoka, Eiji Kamio, Takashi Tachikawa, Shik Chi Edman Tsang, Hideto Matsuyama

  Elsevier BV, Aug. 2022, Chemical Engineering Journal, 442, 136254 - 136254

  [Refereed]

  Scientific journal


• Integration of thin film composite graphene oxide membranes for solvent resistant nanofiltration

  Kecheng Guan, Kai Ushio, Keizo Nakagawa, Takuji Shintani, Tomohisa Yoshioka, Atsushi Matsuoka, Eiji Kamio, Wanqin Jin, Hideto Matsuyama

  Elsevier BV, Jul. 2022, Journal of Membrane Science, 660, 120861 - 120861

  [Refereed]

  Scientific journal


• Novel Tough Ion-Gel-Based CO₂ Separation Membrane with Interpenetrating Polymer Network Composed of Semicrystalline and Cross-Linkable Polymers

  Jinhui Zhang, Eiji Kamio, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  American Chemical Society (ACS), Apr. 2022, Industrial & Engineering Chemistry Research, 61(13) (13), 4648 - 4658

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Fundamental investigation on controlling factors of reverse solute flux of branched thermo-responsive oligomer in forward osmosis process

  Atsushi Matsuoka, Masayuki Fukushima, Eiji Kamio, Hideto Matsuyama

  Lead, Elsevier BV, Apr. 2022, Desalination, 527, 115599 - 115599

  [Refereed]

  Scientific journal


• Tough ion gels composed of coordinatively crosslinked polymer networks using ZIF-8 nanoparticles as multifunctional crosslinkers

  Eiji Kamio, Masayuki Minakata, Hinako Nakamura, Atsushi Matsuoka, Hideto Matsuyama

  Through reversible coordination bond formation with a polymer network, ZIF-8 nanoparticles act as a healable multi-functional crosslinker to give high mechanical strength to an ion gel.

  Royal Society of Chemistry (RSC), 2022, Soft Matter, 18(25) (25), 4725 - 4736, English, International magazine

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Organic solvent mixture separation using fluorine-incorporated thin film composite reverse osmosis membrane

  Wataru Kushida, Ralph Rolly Gonzales, Takuji Shintani, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  2022, Journal of Materials Chemistry A, 10(8) (8), 4146 - 4156, English

  [Refereed]

  Scientific journal


• A gradient viscosity model for estimating CO2 permeability of amino acid ionic liquid-based facilitated transport membrane

  Atsushi Matsuoka, Akihito Otani, Eiji Kamio, Hideto Matsuyama

  Lead, Elsevier BV, Jan. 2022, Separation and Purification Technology, 280, 119847 - 119847

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Effect of temperature on the osmotic behavior of LCST type ionic liquid solutions as draw solutions in the forward osmosis process

  Eiji Kamio, Hiroki Kurisu, Tomoki Takahashi, Atsushi Matsuoka, Tomohisa Yoshioka, Keizo Nakagawa, Yuchen Sun, Hideto Matsuyama

  Nov. 2021, Separation and Purification Technology, 275

  [Refereed]

  Scientific journal


• Inorganic/Organic Micro-Double-Network Ion Gel-Based Composite Membrane with Enhanced Mechanical Strength and CO2 Permeance

  Jinhui Zhang, Eiji Kamio, Masayuki Kinoshita, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Sep. 2021, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 60(34) (34), 12698 - 12708, English

  [Refereed]

  Scientific journal


• Development of a Micro-Double-Network Ion Gel-Based CO2 Separation Membrane from Nonvolatile Network Precursors

  Jinhui Zhang, Eiji Kamio, Atsushi Matsuoka, Keizo Nakagawa, Tomohisa Yoshioka, Hideto Matsuyama

  Sep. 2021, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 60(34) (34), 12640 - 12649, English

  [Refereed]

  Scientific journal


• Using reverse osmosis membrane at high temperature for water recovery and regeneration from thermo-responsive ionic liquid-based draw solution for efficient forward osmosis

  Eiji Kamio, Hiroki Kurisu, Tomoki Takahashi, Atsushi Matsuoka, Tomohisa Yoshioka, Keizo Nakagawa, Hideto Matsuyama

  Aug. 2021, Membranes, 11(8) (8)

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Fundamental Investigation of the Rate-Determining Step of CO2 Permeation through Ion Gel Membranes Containing Amino-Acid Ionic Liquid as the CO2 Carrier

  Atsushi Matsuoka, Shu Taniguchi, Eiji Kamio, Hideto Matsuyama

  Lead, May 2021, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 60(19) (19), 7397 - 7405, English

  [Refereed]

  Scientific journal


• ICOM 2020

  Yoshioka Tomohisa, Akamatsu Kazuki, Nakagawa Keizou, Takaba Hiromitsu, Araki Sadao, Kamio Eiji, Matsuoka Atsushi, Kai Teruhiko, Kawakatsu Takahiro, Ohshiba Yuhei, Higa Mitsuru, Ishii Katsunori, Nomura, Mikihiro, Saeki Daisuke, Tsuru Toshinori, Moriyama Norihiro, Sakai Motomu

  THE MEMBRANE SOCIETY OF JAPAN, 2021, MEMBRANE, 46(2) (2), 98 - 111, Japanese


• Inorganic/organic double-network ion gel membrane with a high ionic liquid content for CO2 separation

  Eiji Kamio, Masayuki Minakata, Yu Iida, Tomoki Yasui, Atsushi Matsuoka, Hideto Matsuyama

  Jan. 2021, POLYMER JOURNAL, 53(1) (1), 137 - 147, English

  [Refereed]

  Scientific journal


• Effect of ligand structures on oxygen absorbability and viscosity o metal-containing ionic liquids

  Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

  Lead, Nov. 2020, JOURNAL OF MOLECULAR LIQUIDS, 318, 114365 - 114365, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Fundamental investigation of the gas permeation mechanism of facilitated transport membranes with Co(salen)-containing ionic liquid as O-2 carriers

  Atsushi Matsuoka, Eiji Kamio, Tomohisa Yoshioka, Keizo Nakagawa, Hideto Matsuyama

  Lead, Oct. 2020, SEPARATION AND PURIFICATION TECHNOLOGY, 248, 117018 - 117018, English

  [Refereed]

  Scientific journal


• Investigation into the Effective Chemical Structure of Metal-Containing Ionic Liquids for Oxygen Absorption

  Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

  Lead, Dec. 2019, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 58(51) (51), 23304 - 23316, English

  [Refereed]

  Scientific journal


• Facilitated O-2 transport membrane containing Co(II)-salen complex-based ionic liquid as O-2 carrier

  A. Matsuoka, E. Kamio, T. Mochida, H. Matsuyama

  Novel metal-containing ionic liquids (MCILs) with O-2 absorbability were synthesized by mixing a N, N'-bis(salicylidene) ethylenediamine cobalt(II) (Co(salen)) complex and ionic liquid-based ligands. The couple of anions of the ionic liquid-based ligands, trihexyl(tetradecyl) phosphonium N-methylglycinate and trihexyl(tetradecyl) phosphonium bis(trifluoromethanesulfonyl) imide, coordinated to Co(salen) complex and gave negative charge to the neutral Co(salen). The negatively chaged Co(salen) complex with the ionic liquid-based ligands and the bulky trihexyl(tetradecyl) phosphonium cation allowed to form Co(salen) complex-based MCILs. The MCILs could chemically and selectively absorb a large amount of O-2 and could function as an O-2 carrier in supported MCIL membranes. The O-2 permeability of the MCIL-based facilitated O-2 transport membranes were higher than those of conventional fixed-O-2 carrier membranes as well as polymer membranes. The fast O-2 transportation could be realized from the high diffusivity of the O-2 complex, which was formed via the reaction between MCIL and O-2, owing to the liquidity of the MCILs.

  Lead, ELSEVIER SCIENCE BV, Nov. 2017, JOURNAL OF MEMBRANE SCIENCE, 541, 393 - 402, English

  [Refereed]

  Scientific journal

• 革新的水処理および創エネルギー技術の構築を目指した次世代型正浸透膜法の体系化

  松山 秀人, 松方 正彦, 比嘉 充, 小野 努, 吉岡 朋久, 神尾 英治, 中川 敬三, 佐伯 大輔, 松岡 淳

  日本学術振興会, 科学研究費助成事業, 基盤研究(A), 神戸大学, 05 Apr. 2021 - 31 Mar. 2025

  1．新規水チャネル型FO膜の創製 1-1．環状ペプチド分子集合体チャネル膜の創製（松山、吉岡、佐伯）：分子動力学計算に基づき分子設計された種々の環状ペプチドについて、リン脂質二分膜へ導入してペプチドチャネル型FO膜作成を行った。1-2．イオンビーム飛跡グラフト重合法によるナノウォーターチャネルFO膜の構築（比嘉）：ポリエチレンフィルムにXeイオンビームを照射後、クロロメチルスチレンのグラフト重合を行うことでナノチャネル作成を試みた。照射前後の膜電位測定でグラフト鎖の導入を確認した。1-3．革新的ロバスト無機ゼオライトFO膜の創製（松方）：孔構造の異なる支持体上にゼオライト膜を製膜しそのFO膜特性の評価を行った。支持体構造がゼオライト膜の水透過性に影響することが明らかになった。1-4．計算機科学による高機能FO膜開発支援 (吉岡)：Amphotericin Bの環状ペプチドの一部の水酸基を水素に置換することで疎水化したチャネルモデルがより高い透水性を示すことを分子動力学（MD）シミュレーションで見出した。 2．新規刺激応答性駆動溶液（DS）の創製 2-1．熱応答性イオン液体DSの創製（小野、松岡）：種々の水素結合性官能基を有するカチオンと、疎水的なアニオンであるbis(trifluoromethylsulfonyl)imideからなる数種の上限臨界溶液温度型イオン液体を開発した。2-2．刺激応答性有機ポリマーDSの開発（中川）：親水的なエチレンオキサイド(EO)及び疎水的なブチレンオキサイド(BO)の共重合比によって相分離挙動を制御する下限臨界溶液温度型コポリマーDSを開発した。 3．FO膜透過とDS再生を含む連続システムによるFS評価とFO膜システムの実証（松山、神尾）：開発DSを用いて連続再生するFOシステムのラボ実験を行い、透水性能評価とともに物質収支データを収集した。