Improvement strength is beneficial to the popularization of hollow fiber nanofiltration(NF) membrane.The tri-channel hollow fiber NF membrane was prepared by interfacial polymerization(IP).The high strength tri-channe...Improvement strength is beneficial to the popularization of hollow fiber nanofiltration(NF) membrane.The tri-channel hollow fiber NF membrane was prepared by interfacial polymerization(IP).The high strength tri-channel hollow fiber ultrafiltration(UF) membrane were used as the support membrane,m-phenylenedianline(m-PDA),and polyethylenimine(PEI) were used as aqueous phase monomer,and trimesoyl chloride(TMC) was used as organic phase monomer.Fourier transform infrared spectroscopy(FTIR),scanning electron microscope(SEM),and gas sorption analyzer(GSA) were applied in structural analysis of NF membrane.Polymer FTIR illustrates the IP occurrence between aqueous phase monomer and organic phase monomer.The SEM images of NF membrane show the formation of a thin dense layer on surface of support membrane after IP.The flux(J) of optimal NF membrane is 11.2 L·m-2· h-1 at the 0.35 MPa operating pressure.Its retention(R) for NaCl,Na2SO4,MgCl2,Xylenol orange,and Neutral red is 17.4%,30.2%,16.1%,94.3%,and 51.0%,respectively.The NF membrane is on negative charge and its pore radius distributes between 0.3-2.0 nm.展开更多
为了研究平板纳滤膜表面Zeta电位测试中的最佳条件和极细中空纤维纳滤膜表面Zeta电位测试方法,以平板聚酰胺纳滤膜和醋酸纤维素中空纤维纳滤膜为研究对象,根据流动电位法原理,利用Sur PASS固体表面Zeta电位分析仪测试纳滤膜表面Zeta电位...为了研究平板纳滤膜表面Zeta电位测试中的最佳条件和极细中空纤维纳滤膜表面Zeta电位测试方法,以平板聚酰胺纳滤膜和醋酸纤维素中空纤维纳滤膜为研究对象,根据流动电位法原理,利用Sur PASS固体表面Zeta电位分析仪测试纳滤膜表面Zeta电位,并首次提出醋酸纤维素中空纤维纳滤膜Zeta电位测试方法.实验结果表明:纳滤膜样品测试前需要在超纯水中浸泡2 h以上;平板纳滤膜最佳测试压力为3 k Pa;平板膜样品池的流道最佳高度为100~110μm,测试流量在80~120 m L/min,样品测试结果的标准偏差小于2m V.醋酸纤维素中空纤维纳滤膜在测试前,通过调节样品填充的紧实程度控制测试流量在80~120 m L/min,测试结果的标准偏差小于1 m V.展开更多
基金National High Technology Research and Development Program of China (863 program) (No. 2008AA06Z330)National Technician Service Enterprise Action Program,China (No. 2009GJD00048)
文摘Improvement strength is beneficial to the popularization of hollow fiber nanofiltration(NF) membrane.The tri-channel hollow fiber NF membrane was prepared by interfacial polymerization(IP).The high strength tri-channel hollow fiber ultrafiltration(UF) membrane were used as the support membrane,m-phenylenedianline(m-PDA),and polyethylenimine(PEI) were used as aqueous phase monomer,and trimesoyl chloride(TMC) was used as organic phase monomer.Fourier transform infrared spectroscopy(FTIR),scanning electron microscope(SEM),and gas sorption analyzer(GSA) were applied in structural analysis of NF membrane.Polymer FTIR illustrates the IP occurrence between aqueous phase monomer and organic phase monomer.The SEM images of NF membrane show the formation of a thin dense layer on surface of support membrane after IP.The flux(J) of optimal NF membrane is 11.2 L·m-2· h-1 at the 0.35 MPa operating pressure.Its retention(R) for NaCl,Na2SO4,MgCl2,Xylenol orange,and Neutral red is 17.4%,30.2%,16.1%,94.3%,and 51.0%,respectively.The NF membrane is on negative charge and its pore radius distributes between 0.3-2.0 nm.
文摘为了研究平板纳滤膜表面Zeta电位测试中的最佳条件和极细中空纤维纳滤膜表面Zeta电位测试方法,以平板聚酰胺纳滤膜和醋酸纤维素中空纤维纳滤膜为研究对象,根据流动电位法原理,利用Sur PASS固体表面Zeta电位分析仪测试纳滤膜表面Zeta电位,并首次提出醋酸纤维素中空纤维纳滤膜Zeta电位测试方法.实验结果表明:纳滤膜样品测试前需要在超纯水中浸泡2 h以上;平板纳滤膜最佳测试压力为3 k Pa;平板膜样品池的流道最佳高度为100~110μm,测试流量在80~120 m L/min,样品测试结果的标准偏差小于2m V.醋酸纤维素中空纤维纳滤膜在测试前,通过调节样品填充的紧实程度控制测试流量在80~120 m L/min,测试结果的标准偏差小于1 m V.
