New Solvents for Cellulose. II. Ethylenediamine/Thiocyanate Salt System
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概要
- 論文の詳細を見る
The ethylenediamine/thiocyanate salt system was found to be a new solvent for cellulose. The solubility, dissolution behavior, solution properties, and cellulose recovered from the solutions were investigated. The dissolution took place at room temperature, and the maximum solubility achieved was 16％ (w/w) for cellulose of DP210 in the ethylenediamine/sodium thiocyanate 54/46 (w/w).The dependence of cellulose solubility on DP is also described. Tracing the dissolution behavior of the cellulose by CP/MAS ^<13>CNMR measurements revealed the polymorphic conversion of cellulose l to III to amorphous structure during the dissolution process. The cellulose dissolved was stable for 30 days storage at room temperature. Microscopic observations and steady-shear viscosity measurements of the solutions indicated mesophase formation of cellulose in the ethylenediamine/sodium thiocyanate system. This anisotrpoic phase appeared from ca.10％ (w/w) cellulose with DP210 and greatly depended on the cellulose concentrations. Coagulation studies disclosed that cellulose II and amorphous cellulose were recovered from the cellulose/ethylenediamine/thiocyanate salt solutions when water and alcohol were used as a coagulant, respectively. It was suggested that this solvent system has high potential for cellulosic fiber and film formations.
- 社団法人 高分子学会の論文
- 2004-02-15
著者
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YOSHIDA Takashi
Department of Pharmacognosy, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Oka
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三浦 正勝
Department Of Applied And Environmental Chemistry Kitami Institute Of Technology
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Yoshida Takashi
Department Of Agriculture Kyoto University
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Hattori Kazuyuki
Department Of Applied And Environmental Chemistry Kitami Institute Of Technology
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ABE Emiko
Department of Obstetrics and Gynecology, Ehime University School of Medicine
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Abe Emiko
Department Of Applied And Environmental Chemistry Kitami Institute Of Technology
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CUCULO John
Department of Textile Engineering, Chemistry, and Science, Centennial Campus North Carolina State Un
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Cuculo John
Department Of Textile Engineering Chemistry And Science Centennial Campus North Carolina State Unive
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Yoshida Takashi
Department Of Applied And Environmental Chemistry Kitami Institute Of Technology
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