| N-酰基壳聚糖的合成及膜的结构与性能 |
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| 引用本文： | 郑化,杜予民.N-酰基壳聚糖的合成及膜的结构与性能[J].武汉大学学报(理学版),2002,48(2):197-200. |
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| 作者姓名： | 郑化 杜予民 |
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| 作者单位： | 1. 武汉大学,环境科学系,湖北,武汉,430072;武汉理工大学,化学工程系,湖北,武汉,430070
2. 武汉大学,环境科学系,湖北,武汉,430072 |
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| 基金项目： | 国家自然科学基金资助项目（29977014） |
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| 摘 要： | 以甲醇和醋酸为介质，通过酸酐与壳聚糖反应合成出N－酰基壳聚糖，并以溶液法制备出N－酰基壳聚糖膜。实验结果表明，降低醋酸浓度，增大甲醇用量以及酸酐／氨基摩尔比可提高壳聚糖的N－酰基取代度；控制醋酸和甲醇浓度以及酸酐／氨基摩尔比可获得不同取代度的N－酰基壳聚糖；N－酰基壳聚糖较为合适的合成条件为：ω(MeOH)80%、ω（AcOH)1%、酸酐／氨基摩尔比0－3.N-位长脂肪链的导入，破坏了壳聚糖原有的晶体结构，随着N－酰基脂肪链数的增长，N－酰基壳聚糖的结晶度逐渐减小，力学性能逐渐降低。
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| 关 键 词： | N－酰基壳聚糖 合成 N－酰基壳聚糖膜 结构表征 力学性能 晶体结构 溶液法 取代度 |
| 文章编号： | 0253-9888(2002)02-0197-04 |
| 修稿时间： | 2001年5月20日 |
Preparation of N-acylchitosan and Structure,Properties of their Films |
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| ZHENG Hua,DU Yu-min.Preparation of N-acylchitosan and Structure,Properties of their Films[J].JOurnal of Wuhan University:Natural Science Edition,2002,48(2):197-200. |
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| Authors: | ZHENG Hua DU Yu-min |
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| Institution: | ZHENG Hua1,2,DU Yu-min1 |
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| Abstract: | N-acylchitosan prepared by reaction between carboxylic anhydride and chitosan in CH3OH and acetic acid (AcOH) , as the medium of reaction, and films of N-acylchitosan prepared from their solution. Degree of substitution (DS) of N-acylchitosan can be enhanced by decreasing the concentration of acetic acid, increasing CH3OH and the carboxylic anhydride/-NH2 molar ratio. Therefore the optimum condition is evaluated as 80% n(CH3OH), 1% n(AcOH) and 0-3 of carboxylic anhydride/-NH2 molar ratio. The X-RD results showed that N-acylchitosan exhibited new crystalline structure. Their crystalline degree decreased with an increase of N-acrylaliphatic chain number, but the mechanical properties decreased. |
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| Keywords: | chitosan film of N-acylchitosan structure and property |
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