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| 壳聚糖中空纤维膜的制备及其结构研究 | |
| 引用本文： | 肖通虎,曹义鸣,邓麦村,周美青,刘健辉,陈珊妹.壳聚糖中空纤维膜的制备及其结构研究[J].膜科学与技术,2009,29(4). |
| 作者姓名： | 肖通虎 曹义鸣 邓麦村 周美青 刘健辉 陈珊妹 |
| 作者单位： | 1. 中国科学院,大连化学物理研究所,大连,116023;中国科学院,研究生院,北京,100049 2. 中国科学院,大连化学物理研究所,大连,116023 3. 宁波大学,材化学院,宁波,315211 |
| 基金项目： | 国家"973"计划项目，浙江省自然科学基金资助项目 |
| 摘 要： | 采用干湿相转化成膜的方法,纺制了壳聚糖中空纤维膜,研究了干燥方法及成膜条件对膜结构的影响.实验发现自然干燥导致膜的严重收缩,最终形成整体致密的膜结构;采用乙醇-正己烷液-液交换干燥,能够有效地避免膜结构的完全致密化,最终形成整体非对称的膜结构.成膜条件的研究结果表明,壳聚糖浓度的提高,更易形成致密层增厚的膜结构;而凝胶温度及凝胶液组成中氢氧化钠浓度的升高,有利于形成致密层更薄,支撑层孔径更大的整体非对称膜结构.进一步的研究表明,整体非对称结构的壳聚糖中空纤维膜可以应用于渗透汽化分离碳酸二甲酯/甲醇混合物,突破恒沸组成的限制,具有较好的应用前景. |
| 关 键 词： | 壳聚糖中空纤维膜 干燥方法 成膜条件 膜结构 渗透汽化 |
Preparation and structures of chitosan hollow fiber membranes |
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| XIAO Tonghu,CAO Yiming,DENG Maicun,ZHOU Meiqing,LIU Jianhui,CHEN Shanmei.Preparation and structures of chitosan hollow fiber membranes[J].Membrane Science and Technology,2009,29(4). | |
| Authors: | XIAO Tonghu CAO Yiming DENG Maicun ZHOU Meiqing LIU Jianhui CHEN Shanmei |
| Affiliation: | 1.Dalian Institute of Chemical Physics;Chinese Academy of Sciences;Dalian 116023;China;2.Graduate University of Chinese Academy of Sciences;Beijing 100049;China3.Faculty of Materials Science and Chemical Engineering;Ningbo University;Ningbo 315211;China |
| Abstract: | Chitosan hollow fiber membranes(CHFM) were fabricated by a dry/wet phase inversion process.The structures of the membranes prepared with different conditions and dried with different methods were studied.Natural drying caused shrinkage of the hollow fibers,which made the resulted membranes into integral dense morphologies.Ethanol-hexane exchange drying reduced the shrinkage of the fibers and made the resulted membranes into asymmetric morphologies with dense skin layer.It was found that the skin layer becam... |
| Keywords: | chitosan hollow fiber membranes drying methods preparation structures pervaporation |
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