2021 Fiscal Year Final Research Report
Construction and investgation of carbon nitride based polymer nanosheets for separation membranes
| Project/Area Number |
19K05619
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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 35020:Polymer materials-related
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| Research Institution | Kagawa University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | ナノシート / 分離膜 |
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| Outline of Final Research Achievements |
In this research, membranes composed of photocatalytic carbon nitrides nanosheets or their mimetic polymers were prepared for the application of separation membranes such as reverse osmosis membranes. The preparations of the nanosheets of carbon nitrides (including polyheptazine imide) with large areas were achieved by the control of synthetic temperature and the hydrothermal treatment. However, since the layered structures of carbon nitride nanosheets were not stable in the aqueous solution due to their hydrophilicity, it is found that the stabilization of the membranes by intermolecular interactions such as electrostatic interaction is required. Further, the syntheses of mimetic polymers of carbon nitrides have been attempted for stable membranes composed of carbon nitride derivatives. As the result, the oligomers consisting of alkyl chains and melem, which is the monomer unit of carbon nitrides, were synthesized and their chemical structures were confirmed by NMR.
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| Free Research Field |
ナノ材料化学
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| Academic Significance and Societal Importance of the Research Achievements |
海水淡水化膜などの分離膜は，現在エネルギーコスト低減のための膜厚の低下，有機物など吸着に伴う目詰まり防止などが望まれている．原子1層分の厚さであるナノシートは分離膜材料として有望視されているが，分離効率の高い大面積な多孔性ナノシートは限られている．窒化炭素類は均一な空孔を有するといわれている光触媒であり，この大面積ナノシートが構築されれば，メンテナンスフリーの分離膜などが期待できる．
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