Synthesis and characterization of polyterephthalamide membranes for encapsulation use: Effect of the amine type and composition on the membrane permeability |
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| Institution: | Department of Chemical Engineering and Chemical Process Engineering Research Institute, Aristotle University of Thessaloniki, PO Box 472540 06 ThessalonikiGreece;Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore;Department of Civil and Environmental Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel;Vontron Membrane Technology Co., Ltd., Guiyang 550018, Guizhou, PR China;State Key Laboratory of Materials-Oriented Chemical Engineering, China;Jiangsu National Synergetic Innovation Center for Advanced Materials, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China |
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| Abstract: | In the present study, the synthesis, characterization and permeability of polyamide membranes for encapsulation use are reported. The membranes were formed by polycondensation at the interface between an organic solution of terepthaloyl dichloride and a hydrogel substrate, swollen to an amine aqueous solution. Different membranes were prepared by varying either the molar ratio of diethylene triamine to terephthaloyl dichloride or by using mixtures of diethylene triamine with a second amine (e.g. ethylene diamine, 1,6-hexamethylene diamine or triethylene tetramine). The polyterephthalamide membrane morphology, its equilibrium water content and thermal behavior, the partition coefficient and the membrane permeability to NaCl are experimentally investigated. Finally, the effects of the ionic strength and pH of the release medium on the permeation characteristics of the polyterepthalamide membranes are experimentally determined. |
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