摘要
以哌嗪水溶液为水相，均苯三甲酰氯正己烷溶液为有机相，通过在聚砜中空纤维基膜上进行界面聚合，制备出聚哌嗪均苯三甲酰胺／聚砜纳滤中空纤维复合膜，并考察其对电解质和非电解质，特别是对维生素C、柠檬酸、维生素B2、秋水仙碱、维生素B12等单组分水溶药物的截留行为．结果表明，对MgSO4、Na2SO4的截留率达到98％，对MgCl2的截留率大于70％；对一价盐NaCl的截留率小于40％；对于分子量小于200的甘露糖截留率为78％；对分子量相近的维生素C、柠檬酸的截留率更低，不到50％；而对于分子量大于300的蔗糖、棉子糖、维生素B2、秋水仙碱、维生素B12的截留率大于92％，并且具有相当的膜通量．因此，聚酰胺／聚砜纳滤中空纤维复合膜的截留分子量为200-300．
A nanofiltration hollow fiber composite membrane was prepared by interracial polymerization using a trimesoyl hexane solution as the oil phase and a piperazine aqueous solution as the water phase on a polysulfone hollow fiber substrate. Its retention behavior to electrolyte and non- electrolyte, especially to single component of water-soluble medicament such as vitamin C, citric acid, vitamin B2, colchicines, vitamin B12 was investigated. The results showed that the salt rejection indicated above 98% to MgSO4 and Na2SO4, greater than 70% to MgCl2, and less than 40 % to a univalent salt of NaCl. The results also showed different performance with a low rejection of 78 % to mannose with a molecular weight less than 200, but even lower than 50 % to vitamin C and citric acid which had similar molecular weights; high rejections of greater than 92% to solute with molecular weights above 300 such as sucrose, raffinose, vitamin B2, colchicine and vitamin B12, and had suitable permeating flux. Therefore, the molecular weight cut - off of a polymide/polysulfone nanofiltration hollow fiber composite membrane was 200 to 300.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2008年第5期28-32,共5页
Membrane Science and Technology
