【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.更多还原

【Abstract】 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 PODCOOH 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.更多还原