| Preparation and Adsorption Ability of Polysulfone Microcapsules Containing Modified Chitosan Gel |
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| 作者姓名： | 陈飞 骆广生 杨伟伟 王玉军 |
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| 作者单位： | State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （No. 20176022） |
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| 摘 要： | Chemically modified chitosan beads containing polyethyleneimine （PEI） were prepared to improve the metal ion adsorption capacity of the chitosan beads and their mechanical stability and to limit their biodegradability. The modified beads were encapsulated with the polymer material polysulfone by a novel surface coating method named the emulsion phase inversion method. The adsorption properties of the modified beads and the microstructures of the polysulfone coating layer were then analyzed. The experimental results showed that the PEI was successfully linked onto the chitosan beads. The density of the -NH2 groups in the modified beads was significantly increased, while the water content was reduced. The coating layer thickness was about 200 pm. The modified chitosan gel beads had excellent Cu（ll） adsorption capacity, with a maximum Cu（ll） adsorption capacity 1.34 times higher than that of the unmodified beads. The results show that even with the polysulfone coating the adsorption kinetics of the modified beads is still better than those of the unmodified beads. The modifications improve the mass transfer performance of the chitosan beads as well as the bead stability.
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| 关 键 词： | 壳聚糖 微胶囊 吸附能力 化学性质 聚乙烯亚胺 稳定性 |
| 收稿时间： | 2004-10-21 |
| 修稿时间： | 2004-10-21 |
Preparation and Adsorption Ability of Polysulfone Microcapsules Containing Modified Chitosan Gel |
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| Fei Chen, &#x; Þ, Guangsheng Luo,
ï, Weiwei Yang, &#x;ÿÿ,Yujun Wang, &#x; .Preparation and Adsorption Ability of Polysulfone Microcapsules Containing Modified Chitosan Gel[J].Tsinghua Science and Technology,2005,10(5):535-541. |
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| Authors: | Fei Chen &#x; Þ Guangsheng Luo
ï Weiwei Yang &#x;ÿÿ Yujun Wang &#x; |
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| Institution: | State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Chemically modified chitosan beads containing polyethyleneimine (PEI) were prepared to improve the metal ion adsorption capacity of the chitosan beads and their mechanical stability and to limit their biodegradability. The modified beads were encapsulated with the polymer material polysulfone by a novel surface coating method named the emulsion phase inversion method. The adsorption properties of the modified beads and the microstructures of the polysulfone coating layer were then analyzed. The experimental results showed that the PEI was successfully linked onto the chitosan beads. The density of the —NH2 groups in the modified beads was significantly increased, while the water content was reduced. The coating layer thickness was about 200 μm. The modified chitosan gel beads had excellent Cu(II) adsorption capacity, with a maximum Cu(II) adsorption capacity 1.34 times higher than that of the unmodified beads. The results show that even with the polysulfone coating the adsorption kinetics of the modified beads is still better than those of the unmodified beads. The modifications improve the mass transfer performance of the chitosan beads as well as the bead stability. |
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| Keywords: | chitosan coating chemical modification adsorption |
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