2022 Fiscal Year Final Research Report
Nanoparticles synthesis, surface-modifiication and separation by manipulating water/CO2 interface without the use of surfactants
| Project/Area Number |
19H02504
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 27020:Chemical reaction and process system engineering-related
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| Research Institution | Hirosaki University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 二酸化炭素 / 泡 / 水 / 分散 / ヤヌス粒子 / 分子集合体 / 表面修飾 |
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| Outline of Final Research Achievements |
Solubility in CO2 fluid increase with increasing pressure, and lowering pressure leads precipitation of materials dissolved. Then a solvent removal process in chemical industry using supercritical CO2 easily achieved by operating pressure. Oure research group recently succeeded formation of water-in-CO2 nanodispersions (W/C-NDs) and CO2-in-water foams (C/W foams) without surfactant being a waste after use. This study developed new W/C-ND stabilizers without fluorine atoms and a typical surfactant architecture. techniques of nanoparticle synthesis/surface-modification in W/C-NDs with the stabilizer, and of Janus-type surface modification of extracted nanoparticles using C/W foams.
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| Free Research Field |
界面化学、コロイド化学、超臨界流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
界面活性剤不要のW/C-NDおよびW/C泡をナノ粒子製造・表面修飾へ応用する研究は世界初であり、大量の溶媒や鋳型材料等添加物、高価な特殊装置の利用、複雑な工程など従来法の様々な欠点を克服した技術になる。原油の枯渇が迫る中，石油化学製品の利用は最低限に抑えるべきであり，本技術のような省エネルギー・クリーン・効率的なプロセスは，化石資源依存から脱する持続性社会に向けた技術として，世界中で，特に化石資源の少ない日本で貢献する。本成果は，CO2に対して未踏のナノコロイド領域を開拓し，CO2の有効利用とエネルギー・環境問題の解決の一助となる有望な将来技術を導く重要な意義をもつ。
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