高稳定性金属有机配位聚合物膜的制备及二甲苯分离性能

Preparation of High Stable Metal-organic Coordination Polymer Membrane with Xylene Isomers Separation Properties

以常见的多孔二氧化硅为载体,采用晶种-二次生长法在溶剂热条件下制备了高稳定性的金属有机配位聚合物膜材料.通过X射线衍射、扫描电子显微镜、单组分气体透过率和二甲苯同分异构体分离等测试手段对材料的结构、形貌和性质等进行了表征.二甲苯同分异构体的渗透汽化分离结果表明,这种多孔膜材料对二甲苯混合物具有选择性吸附分离的性质.进一步通过热处理、超声处理和性能的重复表征,证明了该膜材料具有优良的热稳定性和机械稳定性,适于实际应用.

High stable metal-organic coordination polymer membrane was prepared by a seeding-second growth method at solvothermal condition on porous silica substrate. The morphology,structure and properties of the synthesized membrane were characterized by X-ray diffraction( XRD),scanning electron microscopy(SEM),single gas permeation test and separation test of xylene mixture. The pervaporation process gave the result that this porous membrane exhibited separation performance for xylene mixture by selective adsorption.Furthermore,the thermal stability and mechanical resistence of membrane were proved by heating,ultrasonic treatment and repeated separation test.