2022 Fiscal Year Final Research Report
Preparation of layered hybrid inorganic membranes using supporting polymer membranes with heat resistance
| Project/Area Number |
20K05193
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 27010:Transport phenomena and unit operations-related
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
都留 稔了 広島大学, 先進理工系科学研究科(工), 教授 (20201642)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 分離膜 / layered hybrid構造膜 / 浸透気化法 / オルガノシリカ |
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| Outline of Final Research Achievements |
The separation membranes with a layered hybrid structure were prepared by coating bis(triethoxysilyl)ethane (BTESE)-derived sols, which has ethane groups between Si atoms, on a polymeric porous substrate, followed by heat treatment. Despite the low temperature heat treatment (150°C), the separation factors of Al-BTESE and Zr-BTESE derived layered-structured membranes were about 8000 and over 10000, respectively, in dehydration of isopropyl alcohol aqueous solutions. The performance of the Al-BTESE membrane was comparable to that of a BTESE membrane fired at 300°C using a porous ceramic porous substrate.
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| Free Research Field |
化学工学，膜工学
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| Academic Significance and Societal Importance of the Research Achievements |
セラミック多孔膜は，セラミック支持体上に中間層，分離層からなる多層構造で形成されているが，支持体はコストの大半を占めている。本研究では，高分子多孔性基材上に，高選択性・高透過性を有する無機分離層を超薄膜で製膜したlayered hybrid構造分離膜の製膜法の確立と，作製した分離膜の選択透過性評価を本研究の目的とした。高分子多孔質膜の耐熱性は150℃程度のため，金属イオンをBTESEにドープすることで，150℃熱処理でも分離選択性が向上することを見出した点は実用的な重要な知見であるだけでなく，アモルファスシリカネットワークに金属イオンが及ぼす影響を明らかにした点は学術的にも価値が高い。
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