摘要
采用β-环糊精(β-CD)作为水相单体,均苯三甲酰氯(TMC)为油相单体,通过界面聚合法制备高通量的β-CD/TMC复合纳滤膜,利用细孔模型和静电排斥-立体位阻模型探究染料分离机理。采用红外光谱仪、场发射电子显微镜、接触角测量仪及Zeta电位分析仪进行分析表征。结果表明,红外光谱中出现了酯基官能团的特征峰;Zeta电位分析表明所制备的复合纳滤膜表面荷负电;SEM图像结构和接触角数值表明β-CD浓度为4.0%时,膜表面出现大量褶皱,膜的亲水性更好,0.2 MPa压力下,纯水通量可达207.81 L·m^-2·h^-1,对染料刚果红(CR)、孟加拉玫瑰红(RB)、活性艳红X-3B、亚甲基蓝(MB)的截留率分别为100%、99.05%、97.65%、32.92%;6 h连续运行实验,通量呈现先下降后稳定的趋势,对染料活性艳红X-3B的截留率始终高于97%。
Usingβ-cyclodextrin(β-CD)as the aqueous phase monomer and trimesyl chloride(TMC)as the oil phase monomer,a high-throughputβ-CD/TMC composite nanofiltration membrane was prepared by the interfacial polymerization method.The pore model and electrostatic repulsion-steric hindrance model were used to explore the mechanism of dye separation.Infrared spectrometer,field emission electron microscope,contact angle measuring instrument and Zeta potential analyzer were used for analysis and characterization.The results showed that the peak of ester group which is generated by IP appeared in the FT-IR.Zeta potential analysis indicated that the surface of composite NF membrane was negatively charged.SEM images structure and contact angle values showed that when the concentration ofβ-CD was 4.0%,a lot of folds appeared on the membrane surface and the membrane was more hydrophilic.At the pressure of 0.2 MPa,the pure water flux can reach 207.81 L·m^-2·h^-1,the rejection of the Congo red,the Bengal rose,the reactive brilliant red X-3 B and the methylene blue was 100%,99.05%,97.65%and 32.92%,respectively.The 6 h operation can effectively reject the dye reactive brilliant red X-3 B with rejection higher than 97%flux goes down and then keeps the tendency of stable.
作者
刘丽雪
张少峰
赵长伟
宝乐尔呼
俞灵
王军
LIU Lixue;ZHANG Shaofeng;ZHAO Changwei;BAOLE Erhu;YU Ling;WANG Jun(School of Chemical Engineering,Hebei University of Technology,Tianjin 300130,China;State Key Laboratory of Environment Aquatic Chemistry,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2020年第2期889-898,共10页
CIESC Journal
基金
国家自然科学基金项目(21878323)
关键词
膜
纳滤
界面聚合
Β-环糊精
分离
染料
membrane
nanofiltration
interfacial polymerization
β-cyclodextrin
separation
dye
