复合纳滤膜结构优化研究进展

Research Progress on Structure Optimization of Composite Nanofiltration Membrane

薄层复合纳滤膜因具有成本低、分离效果良好等特点被广泛关注,现如今对于复合纳滤膜的研究主要侧重于对其性能的改性及优化,如表面接枝、构建中间层、共混基质等。但由于在复杂的水处理环境中复合纳滤膜应用效果并不理想,因此在制备复合纳滤膜时,不仅要提高其膜通量和截留率,还应注重其机械强度、抗腐蚀性能以及抗污染能力的优化和改进。分别从基膜优化、中间层构建以及分离层优化3个角度来总结分析近些年国内外专家学者对复合纳滤膜的研究成果,从而为复合纳滤膜在实际工程中的应用提供一些参考。

With the advantages of low cost and good separation effect,the thin-film composite nanofiltration membranes are widely concerned.Nowadays,the research on composite nanofiltration membrane mainly focuses on the modification and optimization of its performance,such as surface grafting,construction of intermediate layer,blending matrix and so on.However,due to the complex water treatment environment,the effect of composite nanofiltration membrane in practical application is not ideal.Therefore,when preparing composite nanofiltration membrane,not only the membrane flux and rejection rate should be improved,but also the optimization and improvement of its mechanical strength,corrosion resistance and anti-pollution ability should be paid to attention.Hence,this paper summarizes and analyzes the research results of composite nanofiltration membrane by experts and scholars at home and abroad in recent years from three aspects:optimization of basal membrane,construction of intermediate layer and optimization of separation layer,which may provide certain reference for the application of composite nanofiltration membrane in practical engineering.