以2,5-二氨基苯磺酸(D IA)和聚乙烯亚胺(PEI)的混合溶液为无机相反应单体,以均苯三甲酰氯(TMC)为有机相单体,以水和正己烷分别作为两相溶剂,通过界面聚合技术制备复合荷电纳滤膜。在PEI浓度1.5%的前提下,确定了界面聚合的优化工艺条件:...以2,5-二氨基苯磺酸(D IA)和聚乙烯亚胺(PEI)的混合溶液为无机相反应单体,以均苯三甲酰氯(TMC)为有机相单体,以水和正己烷分别作为两相溶剂,通过界面聚合技术制备复合荷电纳滤膜。在PEI浓度1.5%的前提下,确定了界面聚合的优化工艺条件:界面聚合时间3 m in,2,5-二氨基苯磺酸浓度0.25%,酸接受剂浓度(碳酸钠和氢氧化钠以质量比2∶1混合)0.15%。展开更多
Nanofiltration separation has become a popular technique for removing largeorganic molecules and inorganic substances from water. It is achieved by a combination of threemechanisms: electrostatic repulsion, sieving an...Nanofiltration separation has become a popular technique for removing largeorganic molecules and inorganic substances from water. It is achieved by a combination of threemechanisms: electrostatic repulsion, sieving and diffusion. In the present work, a model based onirreversible thermodynamics is extended and used to estimate rejection of inorganic salts andorganic substances. Binary systems are modeled, where the feed contains an ion that is much lesspermeable to the membrane as compared with the other ion. The two model parameters are estimated byfitting the model to the experimental data. Variation of these parameters with the composition ofthe feed is described by an empirical correlation. This work attempts to describe transport throughthe nanofiltration membranes by a simple model.展开更多
文摘以2,5-二氨基苯磺酸(D IA)和聚乙烯亚胺(PEI)的混合溶液为无机相反应单体,以均苯三甲酰氯(TMC)为有机相单体,以水和正己烷分别作为两相溶剂,通过界面聚合技术制备复合荷电纳滤膜。在PEI浓度1.5%的前提下,确定了界面聚合的优化工艺条件:界面聚合时间3 m in,2,5-二氨基苯磺酸浓度0.25%,酸接受剂浓度(碳酸钠和氢氧化钠以质量比2∶1混合)0.15%。
文摘Nanofiltration separation has become a popular technique for removing largeorganic molecules and inorganic substances from water. It is achieved by a combination of threemechanisms: electrostatic repulsion, sieving and diffusion. In the present work, a model based onirreversible thermodynamics is extended and used to estimate rejection of inorganic salts andorganic substances. Binary systems are modeled, where the feed contains an ion that is much lesspermeable to the membrane as compared with the other ion. The two model parameters are estimated byfitting the model to the experimental data. Variation of these parameters with the composition ofthe feed is described by an empirical correlation. This work attempts to describe transport throughthe nanofiltration membranes by a simple model.