自支撑NH2-MIL-125/聚■二唑复合正渗透膜的制备及性能  

Preparation and Performance of Self-standing NH2-MIL-125/polyoxadiazole Composite Forward Osmosis Membranes

作　　者：何男 刘威 杨霞[1] 王宪泽 崔晓春 吴敬慧 耿直[1] HE Nan;LIU Wei;YANG Xia;WANG Xianze;CUI Xiaochun;WU Jinghui;GENG Zhi(School of Environment,Northeast Normal University,Changchun 130117,China)

机构地区：[1]东北师范大学环境学院,长春130117

出　　处：《高等学校化学学报》2020年第6期1370-1377,共8页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51978133,51708094,51808103,51908241);中央高校基本科研业务费(批准号:2412019FZ021)资助.

摘　　要：合成了高强度亲水性含羧基聚■二唑材料(POD-COOH)和含氨基金属有机框架材料(NH2-MIL-125),以NH2-MIL-125为填料,与POD-COOH基体材料进行溶液共混,并通过溶液浇铸法制备系列新型自支撑复合正渗透膜,研究NH2-MIL-125的引入对复合正渗透膜结构和性能的影响.研究结果表明,所制备的系列复合正渗透膜均呈致密结构,且随着NH2-MIL-125含量的增加,复合膜的表面亲水性增加、电负性增强,并保持良好的机械性能.以去离子水为进料液,1. 5 mol/L硫酸钠溶液为汲取液,对上述自支撑复合膜进行正渗透性能测试,发现由于消除了传统正渗透膜支撑层的内浓差极化现象,该新型复合正渗透膜在分离过程中具有优异的正渗透性能.A high-strength hydrophilic carboxyl-containing polyoxadiazole material(POD-COOH)and an amino-containing metal organic frame material(NH2-MIL-125)were synthesized first,then a series of novel self-standing composite forward osmosis membranes were prepared using NH2-MIL-125 as filler and POD-COOH as matrix by solution blending and casting method.Further the effects of NH2-MIL-125 introduction on the structure and performance of composite forward osmosis membranes were investigated.The results demonstrated that the prepared self-standing composite forward osmosis membranes had a dense homogeneous structure.The hydrophilicity and electronegativity of the membranes were improved with increasing NH2-MIL-125 content.And the composite membranes maintained good mechanical properties.When the testing feed and draw solutions were pure water and 1.5 mol/L Na2SO4 solution respectively,the prepared self-standing composite membranes exhibited excellent forward osmosis performance,which is attributed to the elimination of internal concentration polarization existing in support layer of traditional forward osmosis membranes.

关 键 词：自支撑正渗透膜 聚■二唑 内浓差极化 

分 类 号：O631[理学—高分子化学]