| Project/Area Number |
23780185
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Wood science
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| Research Institution | Kyoto University |
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Principal Investigator |
ABE Kentaro 京都大学, 生存圏研究所, 助教 (20402935)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | セルロース / キチン / ナノファイバー / ゲル / 高強度 / ハイドロゲル / アルカリ処理 / キトサン |
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| Research Abstract |
Cellulose and chitin exist in nature as highly crystalline nanofibers. First, this study prepared the hydrogels from an aqueous suspension of cellulose nanofibers only by NaOH treatment. The nanofiber suspensions were converted into two kinds of hydrogels with different crystal forms in response to the increasing concentration of NaOH. When treated in 6-9 wt% NaOH, a hydrogel was formed by aggregating the nanofibers with the original morphology and the original crystal form. However, the hydrogel prepared at 15 wt% NaOH had a network formed by the interdigitation of nanofibers and exhibited a highly crystalline cellulose II structure. This method can be applied to chitin nanofibers. In the case of chitins, the use of ethanol voided the dissolution during neutralization and enabled the preparation of a higher strength hydrogel. These unique hydrogels are expected to further expand the application area of natural polymer hydrogels by capturing the features of crystalline networks.
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