2022 Fiscal Year Final Research Report
Creation of siloxane-based elastomers with ordered mesopores
| Project/Area Number |
21K19030
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
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| Research Institution | Waseda University |
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Principal Investigator |
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| Project Period (FY) |
2021-07-09 – 2023-03-31
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| Keywords | 多孔体 / シロキサン / エラストマー |
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| Outline of Final Research Achievements |
Nanoporous siloxane (Si-O-Si)-based materials have a wide range of applications, such as catalysis, adsorption, and separation, due to their high thermal and chemical stability, high surface area, and large pore volume. In this study, a new organosiloxane material with a flexible framework and a regular mesoporous structure was prepared. Colloidal crystals of silica nanoparticles were used as a template. Precise control of the cross-linking structure of organosiloxane within the interparticle voids and optimization of the conditions for the template removal, an organosiloxane-based elastomer with regular pores of diameter less than 55 nm was successfully obtained. This material underwent reversible deformation under compression, demonstrating the potential for seamless control of the pore shape, pore diameter, and porosity using external forces.
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| Free Research Field |
無機合成化学
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| Academic Significance and Societal Importance of the Research Achievements |
無機多孔体は“固い”という固定概念を覆し、ゴムのような柔軟性と規則性メソポーラス構造を両立できれば、細孔の形やサイズを変化させることによって、細孔内部のゲスト種の吸脱着制御や、配向制御、特異な反応などへの利用が期待できる。さらに、ナノ空間は材料の屈折率、誘電率、熱伝導率とも深く関わるため、これらの物性のシームレスな制御も可能となる。さらに、アゾベンゼンなどを組み込むことで、光などの外部刺激をトリガーとして変形を誘起することも期待できる。このように、メソポーラスエラストマーの創製は新しい機能性材料としての魅力的な展開と、幅広い分野への波及効果が見込まれ、大きな意義がある
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