Formation of functional hierarchical structures from aqueous dispersions of cellulose nanofibrils

2010 Fiscal Year Final Research Report

• Project/Area Number: 21780163
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Wood science
• Research Institution: The University of Tokyo
• Principal Investigator: SAITO Tsuguyuki The University of Tokyo, 大学院・農学生命科学研究科, 助教 (90533993)
• Project Period (FY): 2009 – 2010
• Keywords: セルロース

Research Abstract

We have so far dispersed cellulose nanofibrils into water by using a surface carboxylation method of the nanofibrils, namely the TEMPO-mediated oxidation; the dispersed nanofibrils spontaneously align into a nematic-like order. In the present study, we have constructed a wide range of bulk materials, such as hydrogels, aerogels, and films, by controlling the integration mode of the self-aligned cellulose nanofibrils. These bulk materials consisted of aligned cellulose nanofibrils and exhibited outstanding properties.

Research Products

• [Journal Article] TEMPO-Oxidized Cellulose Nanofibrils Dispersed in Organic Solvents (2011)
  • Author(s): Okita, Y., Fujisawa, S., Saito, T., Isogai, A.
  • Journal Title: Biomacromolecules 12 Pages: 518-522
  • Peer Reviewed
• [Journal Article] Oxidation of Bleached Wood Pulp by TEMPO/NaClO/NaClO_2 System : Effect of the Oxidation Conditions on Carboxylate Content and Degree of Polymerization (2010)
  • Author(s): Saito, T.,Hirota, M.,Tamura, N., Isogai, A.
  • Journal Title: Wood Science 56 Pages: 227-232
  • Peer Reviewed
• [Journal Article] バイオ系ナノファイバー:TEMPO触媒酸化による天然セルロースのシングルナノファイバー化と材料物性の発現 (2010)
  • Author(s): 齋藤継之
  • Journal Title: Nanofiber 1 Pages: 35-38
• [Journal Article] Entire Surface Oxidation of Various Cellulose Microfibrils by TEMPO-Mediated Oxidation (2010)
  • Author(s): Okita, Y., Saito, T.,Isogai, A.
  • Journal Title: Biomacromolecules 11 Pages: 1696-1700
  • Peer Reviewed
• [Journal Article] Individualization of Nano-Sized Plant Cellulose Fibrils by Direct Surface Carboxylation Using TEMPO Catalyst under Neutral Conditions (2009)
  • Author(s): Saito, T., Hirota, M., Tamura, N., Fukuzumi, H., Kimura, S., Heux, L., Isogai, A.
  • Journal Title: Biomacromolecules 10 Pages: 1992-1996
  • Peer Reviewed
• [Presentation] Self-aligned materials of TEMPO-oxidized cellulose nanofibrils and pulp fibers (2011)
  • Author(s): Saito, T., Uematsu, T., Kimura, S., Enomae, T., Isogai, A.
  • Organizer: 241th American Chemical Society National Meeting, CELL Division No.127
  • Place of Presentation: Anaheim, California, USA
  • Year and Date: 2011-03-28
• [Presentation] 自己配列したTEMPO酸化ミクロフィブリル及びパルプ繊維の自立構造体 (2010)
  • Author(s): 齋藤継之, 木村聡, 江前敏晴, 磯貝明
  • Organizer: セルロース学会第17回年次大会 P29
  • Place of Presentation: 香川県,徳島文理大学
  • Year and Date: 2010-07-15
• [Presentation] 水中分散したTEMPO酸化ミクロフィブリル及びパルプ繊維の自己配列構造 (2010)
  • Author(s): 齋藤継之, 木村聡, 江前敏晴, 磯貝明
  • Organizer: 第77回紙パルプ研究発表会 14(最優秀発表賞受賞)
  • Place of Presentation: 東京都,タワーホール船堀
  • Year and Date: 2010-06-17
• [Presentation] TEMPO触媒酸化セルロースの構造解析とナノ材料への展開 (2009)
  • Author(s): 齋藤継之
  • Organizer: 日本農学アカデミー第11回シンポジウム
  • Place of Presentation: 東京都,東京大学農学部3号館
  • Year and Date: 2009-11-07
• [Book] セルロースシングルナノファイバー(機能性繊維の最新技術2009,第3章)
  • Author(s): 磯貝明, 齋藤継之
  • Total Pages: 111-118
• [Patent(Industrial Property Rights)] セルロースナノファイバー分散液の製造方法、セルロースナノファイバー分散液、セルロースナノファイバー成形体、及びセルロースナノファイバー複合体 (2010)
  • Inventor(s): 磯貝明, 齋藤継之, 藤澤秀次
  • Industrial Property Rights Holder: 東京大学
  • Industrial Property Number: 特許権,特願2010-159853
  • Filing Date: 2010-07-14
• [Patent(Industrial Property Rights)] 物理ゲルの製造方法および物理ゲル (2010)
  • Inventor(s): 磯貝明, 齋藤継之
  • Industrial Property Rights Holder: 東京大学
  • Industrial Property Number: 特許権,特願2010-137566
  • Filing Date: 2010-06-16