摘要
以聚酰亚胺(PI)超滤膜为支撑层,间苯二胺(MPD)、均苯三甲酰氯(TMC)分别为水相单体及有机相单体,通过界面聚合、化学交联和溶剂活化等步骤制备了聚酰胺(PA)复合耐溶剂纳滤膜.使用傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)表征PI超滤膜和复合纳滤膜的化学组成及表面、断面形貌.系统考察并优化了水相单体浓度、水相添加剂种类和环境湿度对于复合耐溶剂纳滤膜分离性能的影响.该复合耐溶剂纳滤膜在最佳制备条件下的乙醇渗透率可达45.9 L/(m 2·h·MPa),对罗丹明B(相对分子质量479)的截留率为99.8%,表现出优异的分离性能.所制备的复合耐溶剂纳滤膜在80℃的二甲基甲酰胺(DMF)中持续浸泡14 d后,分离性能基本保持不变,表现出优异的耐溶剂性能.
A novel polyamide thin film composite(TFC)organic solvent nanofiltration(OSN)membrane was prepared via interfacial polymerization(IP)on the polyimide substrate,followed by chemical cross-linking and solvent activation.During the IP process,m-phenylenediamine(MPD)and trimesoyl chloride(TMC)were chosen as the aqueous monomer and the organic monomer,respectively.Fourier transform infrared spectroscopy(FTIR)and scanning electron microscope(SEM)were applied to measure the chemical compositions and morphologies of the prepared TFC OSN membranes,respectively.The effects of MPD concentration,aqueous additives species,and environmental humidity on the separation performance of the TFC OSN membranes were investigated systematically.The TFC OSN membranes under the optimal conditions exhibited an excellent dye/ethanol separation performance with a high ethanol permeance of 45.9 L/(m^2·h·MPa)and a high rhodamine B(RDB,479)rejection of 99.8%.In addition,both the ethanol permeance and the RDB rejection of the prepared TFC OSN membranes maintained after being statically immersed in N,N-dimethylformamide(DMF)at 80℃for 14 days,indicating an outstanding solvent resistance.
作者
梁懿之
王肖肖
李灿
韩力挥
苏保卫
高学理
LIANG Yizhi;WANG Xiaoxiao;LI Can;HAN Lihui;SU Baowei;GAO Xueli(Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,College of Chemistry&Chemical Engineering,Ocean University of China,Qingdao 266100,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2019年第4期38-46,共9页
Membrane Science and Technology
基金
国家自然科学基金项目(21476218)
关键词
耐溶剂纳滤
界面聚合
交联
溶剂活化
高通量
organic solvent nanofiltration(OSN)
interfacial polymerization(IP)
cross-linking
solvent activation
high-flux
