| Synthesis and Characterization of a Novel Liquid Crystalline Chitin — Quaternary Ammonium Chitosan Salt |
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| 引用本文： | RUANYong-hong DONGYan-ming WUMing-shui ZENGMan-qing WANGShui-ju. Synthesis and Characterization of a Novel Liquid Crystalline Chitin — Quaternary Ammonium Chitosan Salt[J]. 高等学校化学研究, 2003, 19(4): 512-515 |
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| 作者姓名： | RUANYong-hong DONGYan-ming WUMing-shui ZENGMan-qing WANGShui-ju |
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| 作者单位： | DepartmentofMaterialsScienceandEngineering,XiamenUniversity,Xiamen361005,P.R.China |
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| 基金项目： | Supported by the National Natural Science Foundation of China( No. 2 9974 0 2 3) |
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| 摘 要： | N-Butyl chitosan(NBCS) derivatives were prepared by introducing butyl groups into the amine groups of chitosan via Schiff base intermediates. The quaternization of NBCS was carried out by using ethyl iodide to produce water-soluble cationic polyelectrolytes. The degree of the substitution of the products was measured by means of the electron spectroscopy for a successful chemical analysis. The quaternary ammonium chitosan salt(QACS) was proved to be a novel cholesteric liquid crystalline chitin, by means of the polarized optical microscopy and the circular dichroism spectropolarimetry. The critical mass fraction of the QACS/formic acid solution forming a lyotropic liquid crystal phase was 50%, which was almost the same as that of the NBCS/formic acid solution, but much hiuher than that of the chitosan in the same solvent.
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| 关 键 词： | 合成 表征 晶态角素 四铵壳聚糖 胆甾流体晶体 ESCA CD旋光分光学 天然聚合物 |
| 收稿时间： | 2002-11-28 |
Synthesis and Characterization of a Novel Liquid Crystalline Chitin--Quaternary Ammonium Chitosan Salt |
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| RUAN Yong-Hong,DONG Yan-ming,WU Ming-shui,ZENG Man-qing,WANG Shui-ju. Synthesis and Characterization of a Novel Liquid Crystalline Chitin--Quaternary Ammonium Chitosan Salt[J]. Chemical Research in Chinese University, 2003, 19(4): 512-515 |
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| Authors: | RUAN Yong-Hong DONG Yan-ming WU Ming-shui ZENG Man-qing WANG Shui-ju |
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| Affiliation: | Department of Materials Science and Engineering, Xiamen University, Xiamen 361005, P. R. China |
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| Abstract: | N -Butyl chitosan(NBCS) derivatives were prepared by introducing butyl groups into the amine groups of chitosan via Schiff base intermediates. The quaternization of NBCS was carried out by using ethyl iodide to produce water-soluble cationic polyelectrolytes. The degree of the substitution of the products was measured by means of the electron spectroscopy for a successful chemical analysis. The quaternary ammonium chitosan salt(QACS) was proved to be a novel cholesteric liquid crystalline chitin, by means of the polarized optical microscopy and the circular dichroism spectropolarimetry. The critical mass fraction of the QACS/formic acid solution forming a lyotropic liquid crystal phase was 50%, which was almost the same as that of the NBCS/formic acid solution, but much higher than that of the chitosan in the same solvent. |
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| Keywords: | Quaternary ammonium chitosan Cholesteric liquid crystal ESCA CD spectropolarimetry |
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