| 离子液体中纤维素的均相改性及其产物性能 |
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| 引用本文： | 林世泽,谢雨生,林春香,乔莎. 离子液体中纤维素的均相改性及其产物性能[J]. 化工学报, 2011, 62(Z2): 160-164. DOI: 10.3969/j.issn.0438-1157.2011.z2.029 |
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| 作者姓名： | 林世泽 谢雨生 林春香 乔莎 |
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| 作者单位： | 福州大学环境与资源学院 |
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| 摘 要： | 卤代基团比羟基具有更高的反应活性，因此将含有卤素基团的有机化合物引入到纤维素骨架上可以提高其反应活性，为其后续接枝改性提供更广的应用范围。以氯乙酰氯为酯化剂，离子液体1-丁基-3-甲基咪唑氯盐（［Bmim］Cl）为反应介质，在不加任何催化剂的情况下，直接进行纤维素的均相酯化改性。着重探讨了反应温度、反应时间、酯化剂用量等因素对反应的影响。利用红外光谱（IR）以及核磁共振（NMR）对产物结构进行表征，并研究改性后纤维素在溶剂中的溶解性能。结果表明，离子液体中纤维素的均相酯化改性的最佳工艺条件为：纤维素葡萄糖单元与氯乙酰氯的摩尔比为1∶3，反应温度为常温，反应时间为2 h。此时，改性纤维素取代度为1.36。此外，改性后，纤维素酯易溶于丙酮、二甲基亚砜、四氢呋喃等有机溶剂。
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| 关 键 词： | 离子液体 纤维素 均相改性 溶解性 |
| 收稿时间： | 2011-11-10 |
Homogeneous modification of cellulose in ionic liquid |
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| LIN Shize,XIE Yusheng,LIN Chunxiang,QIAO Sha. Homogeneous modification of cellulose in ionic liquid[J]. Journal of Chemical Industry and Engineering(China), 2011, 62(Z2): 160-164. DOI: 10.3969/j.issn.0438-1157.2011.z2.029 |
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| Authors: | LIN Shize XIE Yusheng LIN Chunxiang QIAO Sha |
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| Abstract: | The homogeneous esterification of cellulose was conducted without any catalysts under mild conditions in an ionic liquid，1-butyl-3-methylimidazolium chloride（［Bmim］Cl），using chloroacetyl chloride as esterifying agent. The influence of reaction temperature，reaction time and the amount of esterifying agent on degree of esterification were investigated. The modified cellulose was characterized by IR and NMR，and the solubility of the product in solutions was also investigated. It was found that the DS of the modified cellulose could be 1.36 under the conditions as follows：the molar ratio of cellulose anhydroglucose unit to chloroacetyl chloride was 1∶3，the reaction time was 2 h，and the reaction could be carried out at room temperature. Moreover，the modified cellulose could easily solute in some organic solutions，such as acetone，dimethyl sulfoxide and tetrahydrofuran.. |
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| Keywords: | ionic liquid cellulose homogeneous modification solubility |
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