Forced adsorption by stress application to flexible nanoporous materials

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K18862
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 28:Nano/micro science and related fields
• Research Institution: Tohoku University
• Principal Investigator: Nishihara Hirotomo 東北大学, 材料科学高等研究所, 教授 (80400430)
• Project Period (FY): 2021-07-09 – 2023-03-31
• Keywords: 吸着 / グラフェン / ナノ多孔体

Outline of Final Research Achievements

In this study, we have successfully accumulated fundamental data on vapor adsorption in flexible nanoporous materials such as carbon mesosponge (CMS). The investigation on the stress-induced steam adsorption indicated that materials with smaller pore sizes are more suitable. Thus, we examined the miniaturization of pore size through hot-pressing treatment of CMS and achieved the pore-size control over a wide range. Additionally, in order to expand the range of material exploration, we synthesized and investigated materials with varying numbers of graphene-stacking layers, as well as explored a different type of nanoporous material with single-graphene walls. Through this research, a deeper understanding of the relationship between the flexibility and adsorption behavior of nanoporous materials was obtained. This led to the emergence of new ideas for liquefying gas molecules using flexible nanoporous materials, and further investigations were conducted regarding this technology.

Free Research Field

材料科学

Academic Significance and Societal Importance of the Research Achievements

単層グラフェンナノ多孔体であるカーボンメソスポンジ、グラフェンメソスポンジといった新素材の吸着挙動に関する基礎データの取得ができました。特にカーボンメソスポンジは有機蒸気を大量に吸着することができ、環境浄化や有機蒸気の回収への利用が期待できます。また、カーボン多孔体の微小な穴（細孔）の大きさを2～7 nmの範囲で自在に制御できる技術も開発しました。これらの成果は低環境負荷のヒートポンプ等の技術開発に繋がることが期待されます。