The University of Tokyo · Materials Science
이 교수의 연구실은 천연 식물 자원에서 유래한 나노셀룰로오스를 중심으로, 고도로 선택적인 TEMPO 산화 반응을 활용한 나노구조 재료의 설계 및 응용을 연구하고 있습니다. 특히, 나노셀룰로오스의 표면 기능화를 통해 높은 Aspect Ratio를 지닌 나노섬유 및 나노크리스탈을 제조하고, 이들의 나노구조적 특성과 상호작용을 정밀하게 제어합니다. 환경 친화적인 재료로서의 나노셀룰로오스의 잠재력을 폭넓게 탐색하며, 탄소 포집과 지속 가능한 사회 실현에 기여하고자 합니다.
Figures are computed from collected data and may differ slightly.
Native wood celluloses can be converted to individual nanofibers 3-4 nm wide that are at least several microns in length, i.e. with aspect ratios>100, by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation and successive mild disintegration in water. Preparation methods and fundamental characteristics of TEMPO-oxidized cellulose nanofibers (TOCN) are reviewed in this paper. Significant amounts of C6 carboxylate groups are selectively formed on each cellulose microfibril surfa
Nanocelluloses have unique morphologies, characteristics, and surface nanostructures, and are prepared from abundant and renewable plant biomass resources. Therefore, expansion of the use of CO<sub>2</sub> -accumulating nanocelluloses is expected to partly contribute to the establishment of a sustainable society and help overcome current global environmental issues. Nanocelluloses can be categorized into cellulose nanonetworks, cellulose nanofibrils, and cellulose nanocrystals, depending on thei
2,2,6,6-Tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidation is a unique reaction to native and regenerated celluloses, and has advantages in terms of position-selective reaction at room temperature under aqueous conditions. When the TEMPO/NaBr/NaClO oxidation is applied to native celluloses in water at pH 10 under suitable conditions, the C6-primary hydroxy groups present on crystalline cellulose microfibril surfaces are mostly converted to sodium C6-carboxylate groups. Anionic sodiu
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