纳滤膜的制备及应用技术研究进展

概述了近２０ 年纳滤膜的制备及应用研究状况。由于纳滤膜在低压下对分子量数百的分子和二价及高价离子具有较高的渗透性和分离性能，使其在工业生产的物料分离、分级、浓缩和回收等方面得到日益广泛的应用，对其制备方法的研究也得到各研究部门的重视。作者主要讨论了纳滤膜的４种制备方法———转化法、共混法、复合法和荷电化法的制备原理和制备要点，讨论了纳滤膜在食品、生化、制药、染料、石化等工业部门及在工业污水和生活污水处理上的应用原理和实例，可以看出，纳滤膜在工业生产的分离和污水处理领域有着广阔的应用前景。

REVIEW ON THE PREPARATION AND APPLICATION OF NANOFILTRATION MEMBRANE

The preparation and application research on nanofiltration membranes were summarized.Due to their high permeability and separation abilities for divalent ions,multivalent ions and molecules with molecule weights changing from 200 to 1?000,under ultra-low pressure,they were widely applied to the separation areas in industry and study on their preparation research was also strengthened in many countries.In this paper,four main methods,transition way,co-blending way,composite way and charging way,and their principles,were discussed.The application examples and principles of nanofiltration membranes were also summarized and discussed in food industry,biochemistry industry,pharmacy industry,dye industry,petroleum chemistry industry and wastewater treatment.It is obvious that nanofiltration membranes have vast commercial and application prospect.