聚酯酰胺反渗透复合膜的制备及其表征  

PREPARATION AND CHARACTERIZATION OF POLYESTER AMIDE COMPOSITE MEMBRANE

作　　者：娄红瑞[1] 王铎[1] 王倩[1] 陈国华[1] 高从堦[1,2] 

机构地区：[1]中国海洋大学化学化工学院,海洋化学理论与工程技术教育部重点实验室 [2]杭州水处理技术研究开发中心,浙江杭州310012

出　　处：《水处理技术》2007年第8期74-76,共3页Technology of Water Treatment

基　　金：国家重点基础研究发展计划(973)项目(2003CB615706)

摘　　要：以间苯二胺、氨基葡萄糖与均苯三甲酰氯为反应物,在聚砜基膜上用界面聚合法制备聚酯酰胺反渗透复合膜。用红外光谱仪(FT-IR)和扫描电子显微镜(SEM)及原子力显微镜(AFM)对所制备膜的结构和形态进行表征。红外光谱的结果表明有聚酰胺和聚酯结构的生成,扫描电镜结果显示复合膜表面呈明显的峰谷状结构,原子力显微镜分析结果表明聚酯酰胺膜表面粗糙度较聚酰胺膜表面粗糙度大。实验考察了界面聚合反应中的水相单体配比对所制备复合膜分离性能的影响;并进一步考察了操作条件及物料性质对制备的聚酯酰胺反渗透复合膜分离性能的影响。研究表明:随水相中氨基葡萄糖配比的增加,复合膜的脱盐率下降,通量上升。聚酯酰胺反渗透复合膜在1.6MPa操作压力下水通量达到27.4L/m2·h以上,对2000mg/L的NaCl、KCl、MgCl2、Na2SO4、MgSO4等无机盐的脱盐率均在97.5%以上。Composite reverse osmosis membranes based on polyester amide were prepared with m-phenylenediamine（MPD）, glucosamine hydrochloride and trimesoyl chloride（TMC） through interracial polymerization technique on the polysulphone supporting film. The surface morphology and structure of membrane were characterized using infrared （FT-IR）and scanning electronic microscopy （SEM）and atomic force microscopy （AFM）, It was shown that the active layer of RO membrane was polyester amide, uneven structure like peaks and valleys appeared on the surface of RO membrane. Effects of the proportion of CS in membrane-making solution and operating conditions etc, on RO performance of the membranes were studied, The results revealed that salt rejection decreased and water flux increased with increase of CS proportion. RO membrane exhibited higher salt rejection of 97,5% and higher flux of 27,4L/m^2.h when operated at 1.6MPa pressure for an aqueous solution containing of NaCl, KCl, MgCl2, Na2SO4, MgSO4 of 2000mg/L respectively.

关 键 词：界面聚合 聚酯酰胺膜 反渗透复合膜 

分 类 号：TQ028.8[化学工程]