Preparation and characterization of polyimide pervaporation membranes via interfacial polymerization

被引：0
|
作者：
Jiang C. [1 ]
Ma W.-Z. [1 ,2 ]
Li T.-Y. [1 ]
Xu R. [1 ]
Zhang Q. [1 ]
Zhong J. [1 ]
机构：
[1] Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou
[2] Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2019年 / 33卷 / 03期
关键词：
Interfacial polymerization; Pervaporation; Polyimide membrane; Solvent-resistance;
D O I：
10.3969/j.issn.1003-9015.2019.03.028
中图分类号：
学科分类号：
摘要：
During pervaporation separation of dimethylformamide (DMF)/water and dimethylacetamide (DMAc)/water systems, a trade-off effect between permeability and selectivity always happens. A method for the synthesis of thin PI composite membranes by interfacial polymerization was proposed for solving this problem. Organic phase monomer pyromellitic chloride (BTAC) was prepared by pyromellitic anhydride and phosphorus pentachloride. Solvent-resistant polyimide (PI) composite membranes were made by interfacial polymerization, where m-phenylenediamine (MPDA), propylenediamine (DAPE) and hexamethylenediamine (HMD) were used as aqueous phase monomers. The PI composite membranes and their pervaporation performance were characterized. All of the three composite membranes had good hydrophilicity and excellent thermal stability. The PI composite membranes presented excellent stabilities after immersing in common organic solvents. When using the HMD-PI membrane to separate solvent/water (90/10 %) from 30 ℃ to 60 ℃, the best separation factor can reach 12.7 and 35.8 for DMF/water and DMAc/water systems respectively, and the flux reaches 1 014 and 542 g∙m-2∙h-1 for DMF/water and DMAc/water systems, respectively. These results indicate that the HMD-PI membrane presents excellent separation performance for solvent/water systems. © 2019, Editorial Board of "Journal of Chemical Engineering of Chinese Universities". All right reserved.
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页码：724 / 731
页数：7
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