【摘 要】
：
A new monomer oftriamine incorporating triazine ring, 1,3,5-(tris-piperazine)-triazine (TPT), was synthesized to fabricate nanofiltration membranes via interfacial polymerization with Trimesoyl chlori
【机 构】
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Key Laboratory of Biomass Chemical Engineering of MOE, College of Chemical and Biological Engineerin
【出 处】
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海峡两岸第五届膜科学技术高级研讨会暨“青山杯”研究生论坛
论文部分内容阅读
A new monomer oftriamine incorporating triazine ring, 1,3,5-(tris-piperazine)-triazine (TPT), was synthesized to fabricate nanofiltration membranes via interfacial polymerization with Trimesoyl chloride (TMC) on polysulfone(PSf) supporting membrane.The TPT-TMC/PSf membranes were characterized for compositional analysis by ATR-IR spectroscopy, surface and cross morphologies by SEM, surface charge by zeta potential measurement.Results revealed that TPT-TMC/PSf composite membrane obtains thinner membrane thickness, smoother and more negatively charged surface than the conventional polypiperazine amide nanofiltration membrane.Under the optimum conditions, the permeation properties of the membranes were evaluated by the rejection and water flux of different kinds of salts (NaCl,Na2SO4,MgCl2,MgSO4) and the TPT-TMC/PSf composite membrane exhibits excellent salt rejections to dianions [Na2SO4 (99.6%) > MgSO4 (98.7%) >MgCl2 (68.6%) > NaCl (40.5%)], which is typical for negatively charged membrane.The acid resistance of the membranes was studied by the evaluation of membrane performance before and after sulphuric acid exposure.The TPT-TMC/PSf composite membrane exhibited considerable acid stability which is attributed to the presence of the triazine ring.
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