研究者紹介システム

松岡 淳
マツオカ アツシ
先端膜工学研究センター
助教
応用化学関係
Last Updated :2022/06/13

研究者情報

所属

  • 【主配置】

    先端膜工学研究センター
  • 【配置】

    工学部 応用化学科, 大学院工学研究科 応用化学専攻

学位

  • 博士(工学), 神戸大学
  • 正浸透膜プロセスを利用した省エネルギーな分離プロセスの開発
  • 正浸透膜プロセスに用いる機能性駆動溶液の開発
  • 金属錯体系イオン液体を用いた酸素分離膜の開発

授業科目

研究ニュース

研究活動

論文

  • Atsushi Matsuoka, Masayuki Fukushima, Eiji Kamio, Hideto Matsuyama

    Elsevier BV, 2022年04月, Desalination, 527, 115599 - 115599

    [査読有り]

    研究論文(学術雑誌)

  • Atsushi Matsuoka, Akihito Otani, Eiji Kamio, Hideto Matsuyama

    Elsevier BV, 2022年01月, Separation and Purification Technology, 280, 119847 - 119847

    [査読有り]

    研究論文(学術雑誌)

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

    Organic solvent reverse osmosis (OSRO) is currently considered as an energy-efficient membrane technology for separation of organic liquid mixtures.

    Royal Society of Chemistry (RSC), 2022年, Journal of Materials Chemistry A

    [査読有り]

    研究論文(学術雑誌)

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

    In this work, several types of ionic liquid (IL)-based thermosensitive draw solutions (DSs) were prepared for application in the forward osmosis (FO) process. The temperature dependence of the osmotic pressure of IL-based DS was investigated to examine the advantages of high-temperature membrane operation for regeneration and water recovery from the DS lean phase after liquid–liquid phase separation of DS with a lower critical solution temperature (LCST). From surface tension and dynamic light scattering measurements, it was found that the association of IL molecules and aggregation of IL associates occurred in hot water, which led to a decrease in the osmotic pressure of the IL-DS at elevated temperatures. The DS regeneration and water recovery using an RO membrane were examined using tetrabutylammonium 2,4,6-trimethylbenzenesulfonate with the largest temperature dependence on osmotic pressure. At elevated temperatures, the water flux and DS concentration in the concentrated solution increased effectively. The investigation demonstrated that high-temperature membrane operation is effective for the regeneration of LCST-type thermosensitive DS and water recovery.

    2021年11月15日, Separation and Purification Technology, 275

    [査読有り]

    研究論文(学術雑誌)

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

    An inorganic/organic micro-double-network (mu-DN) ion gel-based composite membrane with good mechanical properties and high CO2 permeance was developed in this study. The mu-DN ion gel was composed of 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(4)mim][Tf2N]), a cross-linked polymer network, and silica nanoparticle clusters. The mechanical strength of the mu-DN ion gel was optimized to achieve a fracture energy of 636 kJ/m(3). The fabricated composite membrane with an ion gel layer thickness of 4.5 mu m shows a CO2/N-2 permselectivity of 23 and a CO2 permeance of 119 GPU. The gas permeance of the composite membranes was calculated by considering a series of diffusion processes, and the results were in good agreement with the experimental data. The calculation results obtained using the proposed model show high potential of our mu-DN ion gel to achieve much higher CO2 permeance.

    AMER CHEMICAL SOC, 2021年09月, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 60 (34), 12698 - 12708, 英語

    [査読有り]

    研究論文(学術雑誌)

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

    A micro-double-network (mu-DN) ion gel membrane was fabricated using nonvolatile network precursors comprising a presynthesized cross-linkable polymer as the organic part, silica nanoparticles as the inorganic part, and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(4)mim][Tf2N]). The mechanical properties of the ion gel were effectively improved through optimizing the molecular weight of the cross-linkable polymer and the organic/inorganic network composition. The mu-DN ion gel membranes exhibited the CO2 permeability of approximately 920 Barrer under atmospheric pressure, which is much higher than those of the classic double-network ion gel membranes fabricated using volatile network precursors (556 Barrer) and the supported ionic liquid membranes (617 Barrer). The membrane also has good pressure resistance and long-term stability. The mu-DN ion gel membrane formed by nonvolatile network precursors shows good mechanical properties and high CO2 separation performance, which make it a good candidate base material for developing high-permeance thin ion gel membranes.

    AMER CHEMICAL SOC, 2021年09月, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 60 (34), 12640 - 12649, 英語

    [査読有り]

    研究論文(学術雑誌)

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

    Forward osmosis (FO) membrane process is expected to realize energy-saving seawater desalination. To this end, energy-saving water recovery from a draw solution (DS) and effective DS regeneration are essential. Recently, thermo-responsive DSs have been developed to realize energy-saving water recovery and DS regeneration. We previously reported that high-temperature reverse osmosis (RO) treatment was effective in recovering water from a thermo-responsive ionic liquid (IL)-based DS. In this study, to confirm the advantages of the high-temperature RO operation, thermo-sensitive IL-based DS was treated by an RO membrane at temperatures higher than the lower critical solution temperature (LCST) of the DS. Tetrabutylammonium 2,4,6-trimethylbenznenesulfonate ([N4444 ][TMBS]) with an LCST of 58◦C was used as the DS. The high-temperature RO treatment was conducted at 60◦C above the LCST using the [N4444 ][TMBS]-based DS-lean phase after phase separation. Because the [N4444 ][TMBS]-based DS has a significantly temperature-dependent osmotic pressure, the DS-lean phase can be concentrated to an osmotic pressure higher than that of seawater at room temperature (20◦C). In addition, water can be effectively recovered from the DS-lean phase until the DS concentration increased to 40 wt%, and the final DS concentration reached 70 wt%. From the results, the advantages of RO treatment of the thermo-responsive DS at temperatures higher than the LCST were confirmed.

    2021年08月, Membranes, 11 (8)

    [査読有り]

    研究論文(学術雑誌)

  • Atsushi Matsuoka, Shu Taniguchi, Eiji Kamio, Hideto Matsuyama

    The controlling factor of the CO2 permeance of an ion gel membrane containing a task-specific ionic liquid (tetraphosphonium prolinate) as the CO2 carrier was investigated. Tough double-network (DN) ion gel membranes with different thicknesses were fabricated, and their CO2 permeances were evaluated. The results showed that the CO2 permeance of the DN ion gel membrane was not inversely proportional to the membrane thickness, indicating that the CO2 permeance of the membrane was not controlled by diffusion. A theoretical analysis of the relationship between CO2 permeance and the thickness of the membrane revealed that the CO2 stripping rate at the permeate side greatly affected the CO2 permeance of the DN ion gel membrane. Therefore, increasing the decomposition reaction rate of the CO2-carrier complex would be the most important issue for achieving a high CO2 permeance of ion gel membranes containing a task-specific ionic liquid.

    AMER CHEMICAL SOC, 2021年05月, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 60 (19), 7397 - 7405, 英語

    [査読有り]

    研究論文(学術雑誌)

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

    To examine the potential of ion gels as materials for CO2 separation membranes, inorganic/organic double-network ion gel (DN ion gel) membranes with different ionic liquid (IL) contents were fabricated. The composition of the inorganic and organic networks was optimized to maximize the mechanical strength of the DN ion gel. The DN ion gel with an inorganic/organic network composition of 0.35 mol/mol showed the maximum mechanical strength because the inorganic and organic networks sufficiently acted as sacrificial bonds and hidden lengths, respectively. Using DN ion gel membranes with different IL contents prepared with the optimized precursor solution, the relationship between the CO2 permeability and IL content of the DN ion gel membranes was examined. The DN ion gel membrane with 95.2 wt% IL had a CO2 permeability of 1380 barrer, which was similar to 67% of the theoretical maximum predicted for the pure IL membrane. The CO2 permeability of the DN ion gel membrane exponentially increased with increasing IL content and approached the theoretical maximum. DN ion gels with high strength can be used to develop maximum-performance IL-based CO2 separation membranes by giving the membrane the maximum IL potential.

    SPRINGERNATURE, 2021年01月, POLYMER JOURNAL, 53 (1), 137 - 147, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

    Metal-containing ionic liquids (MCILs) composed of a cobalt(II) Schiff base complex and ionic-liquid-based axial ligands (ligand ILs) are potential O-2 absorbents. To determine the design criteria of MCILs with both highly selective O-2 absorbability and low viscosity, the relationship between the physicochemical properties and chemical structure of the MCILs was investigated. The measurement of the amount of O-2 absorbed in MCILs with various ligand as indicated that O-2 reactivity is determined by the electron density of the Co atom of the MCILs. The electron density of the Co atom could be controlled by the (selection donation ability of the ligand ILs. Moreover, the viscosity of the MCILs was strongly affected by the interaction among the MCIL molecules caused by the n electron system. This interaction was weakened by the equatorially coordinating Schiff base and the ligand ILs within the chemical structure. Therefore, to develop MCILs with both high O-2 reactivity and low viscosity, suppression of the interaction caused by the pi electron system without decreasing the electron density of the Co atom is important. (C) 2020 Elsevier B.V. All rights reserved.

    ELSEVIER, 2020年11月, JOURNAL OF MOLECULAR LIQUIDS, 318, 114365 - 114365, 英語

    [査読有り]

    研究論文(学術雑誌)

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

    Metal-containing ionic liquids (MCILs) composed of a cobalt(II)-salen complex and ionic liquid-based axial ligands (ligand ILs) can chemically absorb O-2 and act as O-2 carriers in facilitated transport membranes. O-2 and N-2 permeation tests using supported MCIL membranes with various MCILs revealed that the effective diffusion coefficients of N-2 and O-2-MCIL complexes did not follow to the trend expected by power law theories against viscosity (e.g. the Stokes-Einstein equation), because the MCILs are not in normal liquid state due to the strong intermolecular interaction, but instead showed a tendency predicted by the free volume theory. This means the MCILs behave as a solid rather than a liquid, and N-2, O-2, and the O-2-MCIL complexes would diffuse through the free volume of the MCILs. The solubility selectivity and the diffusion selectivity of the supported MCIL membrane decreased and increased, respectively, with the increase on MCIL molecular wight (free volume). Thus, there was trade-off relationship between the solution selectivity and the diffusion selectivity. It was suggested that the most important criteria for designing MCILs for highly selective O-2 permeation in supported MCIL membranes is the use of an O-2-absorbable metal complex without the strong intermolecular interaction.

    ELSEVIER, 2020年10月, SEPARATION AND PURIFICATION TECHNOLOGY, 248, 117018 - 117018, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atsushi Matsuoka, Eiji Kamio, Hideto Matsuyama

    To control the properties of Co(II)(salen)-based metal-containing ionic liquids (MCILs) for use as O-2 absorbents, the effects of the MCIL chemical structures on viscosity, O-2 absorption amount, and complex-formation reaction rates between O-2 and MCILs were investigated. The chemical structures of the MCILs were systematically changed by coordinating the ligand ILs composed of phosphonium cations with different alkyl-chain lengths and N-methylglycinate or bis(trifluoromethylsulfonyl)imide anion to Co(salen). A series of investigations indicated that intermolecular hydrogen bonding and entanglement of the alkyl chain affected the viscosity of the MCILs. Furthermore, small MCILs afforded large O-2 absorption amounts, high O-2/N-2 absorption selectivities, and fast O-2 absorption reaction. From a numerical calculation of the overall MCIL O-2 absorption rate, it was clarified that the dominant mass-transfer resistance was the diffusion of the O-2-MCIL complex in the MCIL. Based on these results, the design criteria of the MCILs for an efficient O-2 absorbent were revealed.

    AMER CHEMICAL SOC, 2019年12月, INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 58 (51), 23304 - 23316, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 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.

    ELSEVIER SCIENCE BV, 2017年11月, JOURNAL OF MEMBRANE SCIENCE, 541, 393 - 402, 英語

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    研究論文(学術雑誌)