| 热致相分离法制备乙烯-三氟氯乙烯共聚物微孔膜 |
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| 引用本文： | 周波,林亚凯,马文中,唐元晖,田野,王晓琳. 热致相分离法制备乙烯-三氟氯乙烯共聚物微孔膜[J]. 高等学校化学学报, 2012, 33(11): 2585-2590. DOI: 10.7503/cjcu20120033 |
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| 作者姓名： | 周波 林亚凯 马文中 唐元晖 田野 王晓琳 |
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| 作者单位： | 清华大学膜材料与工程北京市重点实验室, 北京 100084 |
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| 基金项目： | 国家“九七三”计划项目(批准号:2009CB623401);国家“八六三”计划项目(批准号:2009AA062901,2012AA03A604);北京市自然科学基金重大项目(批准号:2100001)资助 |
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| 摘 要： | 通过热致相分离法制备了乙烯-三氟氯乙烯共聚物(ECTFE)微孔膜, 考察了ECTFE与不同溶剂的相互作用参数对ECTFE/溶剂体系的液液相区的影响, 通过相容性分析及对ECTFE微孔膜断面结构的观察, 筛选出能与ECTFE发生明显液液相分离的溶剂--邻苯二甲酸二乙酯(DEP). 热力学相图证明, ECTFE/DEP体系具有较宽的液液相分离区, 偏晶点所对应的ECTFE质量分数高达55%. 考察了冷却条件对{ECTFE/DEP体系膜断面结构的影响, 结果表明, 膜断面孔径随着淬冷温度的降低而减小, 在淬冷温度为458 K时膜断面孔径随粗化时间的增加而增大.
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| 关 键 词： | 热致相分离法 微孔膜 乙烯-三氟氯乙烯共聚物 邻苯二甲酸二乙酯 |
| 收稿时间： | 2012-01-09 |
Preparation of Ethylene Chlorotrifluoroethylene Co-polymer Membranes via Thermally Induced Phase Separation |
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| ZHOU Bo,LIN Ya-Kai,MA Wen-Zhong,TANG Yuan-Hui,TIAN Ye,WANG Xiao-Lin. Preparation of Ethylene Chlorotrifluoroethylene Co-polymer Membranes via Thermally Induced Phase Separation[J]. Chemical Research In Chinese Universities, 2012, 33(11): 2585-2590. DOI: 10.7503/cjcu20120033 |
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| Authors: | ZHOU Bo LIN Ya-Kai MA Wen-Zhong TANG Yuan-Hui TIAN Ye WANG Xiao-Lin |
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| Affiliation: | Beijing Key Laboratory of Membrane Materials and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Microporous ethylene chlorotrifluoroethylene co-polymer(ECTFE) membrane was prepared via thermally induced phase separation(TIPS) method. By an analysis of interaction parameter, compatibility of ECTFE/diluent systems and the membrane cross-section morphologies, the liquid-liquid phase separation was found during the TIPS process when diethyl phthalate(DEP) was chosen as a diluent. The thermodynamic phase diagram confirms that a large liquid-liquid phase separation region for the ECTFE/DEP system was observed. The monotectic point of this system appeared at a high polymer concentration which was approximately up to 55%. Moreover, the effects of the cooling temperature and coarsening time on membrane structure, porosity, and tensile strength were also investigated. The results showed that a faster cooling rate and shorter coarsening time at 458 K led to membranes with smaller pore size. |
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| Keywords: | Thermally induced phase separation Ethylene chlorotrifluoroethylene co-polymer Microporous membrane Diethyl phthalate |
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