聚哌嗪酰胺-SiO2/聚砜中空纤维纳滤膜的制备及表征  

Preparation and Characterization of Polyamide-SiO_2/Polysulfone Hollow Fiber Nanofiltration

作　　者：王珍[1] 任翘楚 许振良[1] 魏永明[1] 

机构地区：[1]华东理工大学化学工程研究所膜科学与工程研发中心,化学工程联合国家重点实验室,上海200237

出　　处：《水处理技术》2016年第6期18-21,共4页Technology of Water Treatment

基　　金：2013年国家新材料研发及产业化专项;国家科技部支撑计划项目(2014BAB07B01);上海市科技攻关计划(13521102000);江苏省科技工业支撑计划(BE2013031)

摘　　要：以聚砜(PSf)为基膜,哌嗪(PIP)为水相单体、均苯三甲酰氯(TMC)为油相单体,采用界面聚合的方法制备了聚哌嗪酰胺-SiO_2/PSf中空纤维纳滤膜,通过在水相或者油相中添加SiO_2纳米粒子,使膜在维持较高截留率的情况下提高膜通量,讨论了界面聚合时间、SiO_2在水相或油相中的含量对膜性能的影响。结果表明,当水相PIP的质量浓度为10 g/L、SiO_2、PIP的质量比为0.05,油相TMC的质量浓度为1.5 g/L、界面聚合时间10 s,并在60℃下热处理15 min时,所得纳滤膜具有良好的分离性能,对于无机盐的截留率大小为Na_2SO_4>MgSO_4>NaCl>MgCl_2,表明纳滤膜表面带负电;对活性艳蓝溶液的截留率可达90%以上。Using polysulfone（PSf） hollow fiber membrane as a support membrane, piperazine（PIP） as an aqueous-phase monomer, and trimesoyl chloride（TMC） as an oganic-phase monomer, polyamide-SiO_2/PSf hollow fiber nanofiltration（NF） membranes were manufactured by the interfacial polymerization method. With a high rejection, pure water flux（PWF） of the NF membrane could be improved by adding SiO_2 nanoparticles into the aqueous phase and the organic phase, respectively. The effects of reaction time and SiO_2 content in the aqueous phase or the organic phase on membrane performance were investigated. The results showed that the optimal membrane preparation conditions based on parametric study through single factor experiments were as follows： the mass concentration of PIP was10 g/L, the mass ratio of SiO_2 to PIP was 0.05 and the mass concentration of TMC was 1.5 g/L for 10 s reaction and 15 min heat treatment at 60 ℃. The retention rate of polyamide-SiO_2/PSf hollow fiber NF membrane for different ions decreased in the order of Na_2SO_4 MgSO_4Na ClMgCl_2, which showed the characteristic of NF membrane with negative charge. The prepared membranes showed a rejection to reactive brilliant blue was higher than 90%.

关 键 词：纳滤膜 纳米SiO2粒子 界面聚合 中空纤维膜 

分 类 号：TQ028.8[化学工程]