Application of microcrystalline cellulose to composite materials and anisotropic media

微晶纤维素在复合材料和各向异性介质中的应用

• 批准号: 13556022
• 负责人: KUGA Shigenori
• 金额: $ 8.96万
• 依托单位: THE UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13556022/
• 关键词: cellulose; chitin; microfibril; microcrystal; liquid crystal; steric stabilization; inclusion complex; carbonization; たんぱく質; NMR; 残余双極子結合; 配向場; ポリマーブラシ; セルローズ; タンパク質

Characterization and chemical modification of native cellulose and chitin was pursued for developing novel materials based on microfibrillar characteristics.1. Several new aspects of cellulose microcrystal suspension (rod-like colloid) were elucidated, such as : nematic mesophase formation by microcrystals from bacterial cellulose and influence of trace electrolyte ; successful steric stabilization of microcrystals by PEG/dextran binding (polymer brush systems).2. Attempts for utilization of microcrystal mesophase to protein NMR analysis were unsuccessful due to poor balances between protein-cellulose interaction and orientational effects.3. Composite film of cellulose microcrystal and silk fibroin showed anomalous dependence of mechanical strength on mixing ratio. This feature was ascribed to epitaxial effect of cellulose crystal on fibroin, which showed formation of beta-sheet in infrared spectroscopy.4. Scope of inclusion complexation of beta-chitin was investigated. Aliphatic amines were found to be particularly effective agents.5. Pyrolytic carbonization of cellulose microcrystals through novel drying methods gave novel form of carbon with microfibrillar morphologies and large extrenal surface area, potentially advantageous for electrode and composite material applications.

追求天然纤维素和几丁质的特征和化学修饰，以基于微纤维特征开发新型材料。1。阐明了纤维素微晶悬浮液（杆状胶体）的几个新方面，例如：通过细菌纤维素产生的微晶和痕量电解质的影响的微晶形成夜间介质；通过PEG/DEXTRAN结合（聚合物刷系统）成功地稳定微晶。2。由于蛋白质 - 纤维素相互作用和定向效应之间的平衡不足，因此尝试利用微晶中间体对蛋白质NMR分析的尝试没有成功。3。纤维素微晶和丝纤维蛋白的复合膜显示机械强度对混合比的异常依赖性。该特征归因于纤维素晶体对纤维蛋白的外延作用，该纤维蛋白在红外光谱中显示了β-片的形成。4。研究了β-吉他蛋白的包含络合范围。发现脂肪族胺特别有效。5。纤维素微晶的热解碳化通过新颖的干燥方法具有新型的碳形式，具有微纤维形态和较大的外表面积，对电极和复合材料的应用有可能有利。

项目成果

J.Araki et al.: "Effect of trace electrolyte on liquid crystal type of cellulose microcrystals"Langmuir. 17. 4493-4496 (2001)

J.Araki 等人：“微量电解质对液晶型纤维素微晶的影响”Langmuir。

Influence of reagent addition on carbodiimide-mediated amidation for poly(ethylene glycol) grafting

• DOI: 10.1002/app.10549
• 发表时间: 2002-08-08
• 期刊: JOURNAL OF APPLIED POLYMER SCIENCE
• 影响因子: 3
• 作者: Araki, J;Kuga, S;Magoshi, J
• 通讯作者: Magoshi, J

Steric Stabilization of Cellulose Microcrystal Suspension by Poly (ethylene glycol) Grafting

聚乙二醇接枝对纤维素微晶悬浮液的空间稳定性

• 发表时间: 2001
• 期刊: Langmuir 17
• 作者: J.Araki;M.Wada;S.Kuga
• 通讯作者: S.Kuga

Y.Noishiki, S.Kuga, J.Magoshi: "Mechanical properties of silk fibroin-microcrystalline cellulose composite films"J. Appi. Polym. Sci.. 86. 3425-3429 (2002)

Y.Noishiki，S.Kuga，J.Magoshi：“丝素蛋白-微晶纤维素复合膜的力学性能”J。

J.Araki, S.Kuga, J.Magoshi: "Influence of Reagent Addition on Carbodiimide-Mediated Amidation for Poly(Ethylene Glycol) Grafting"J. Appi. Polym. Sci.. 85. 1349-1352 (2002)

J.Araki、S.Kuga、J.Magoshi：“试剂添加对碳二亚胺介导的聚乙二醇接枝酰胺化的影响”J.