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.

对天然纤维素和甲壳素进行表征和化学改性，以开发基于微纤维特性的新型材料。 1．阐明了纤维素微晶悬浮液（棒状胶体）的几个新方面，例如：细菌纤维素微晶形成向列中间相以及微量电解质的影响；通过 PEG/葡聚糖结合（聚合物刷系统）成功实现微晶的空间稳定。2．由于蛋白质-纤维素相互作用和取向效应之间的平衡不佳，利用微晶中间相进行蛋白质核磁共振分析的尝试没有成功。3．纤维素微晶和丝素蛋白的复合膜表现出机械强度对混合比的异常依赖性。这一特征归因于纤维素晶体在丝心蛋白上的外延效应，红外光谱显示β-折叠的形成。 4．研究了β-甲壳素的包合络合范围。发现脂肪胺是特别有效的试剂。5．通过新颖的干燥方法对纤维素微晶进行热解碳化，得到具有微纤维形态和大外表面积的新型碳，这对于电极和复合材料应用具有潜在的优势。

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

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。

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

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.