Constructing nano-composite nanofiltration membranes by in-situ growth: membrane preparation and application

The growth of the population and the advancement of industrialization have made the harmless treatment and resource utilization of industrial waste liquid a major challenge facing today’s society. As a green, efficient, and environmentally friendly membrane separation technology, nanofiltration technology demonstrates great potential for industrial waste liquid treatment. However, in practical applications, traditional nanofiltration membranes are generally restricted by the “trade-off” effect between selectivity and permeability, as well as the problem of membrane fouling. In recent years, the introduction of nanomaterials with excellent physical and chemical properties into nanofiltration membranes has provided new ideas for solving the above-mentioned problems. This paper reviews the nanomaterials used in the preparation of nano-composite membranes, with a particular focus on the application of in-situ growth in the construction of separation layers or functional layers formed by nanomaterials in nanofiltration membranes. It elaborates in detail on its preparation strategies, structure regulation mechanisms, and performance optimization mechanisms, and introduces the application progress of the prepared nano-composite nanofiltration membranes in the treatment of industrial waste liquid. The aim is to provide theoretical guidance and technical reference for the design and preparation of high-performance composite nanofiltration membranes, and to promote technological innovation and industrial applications in this field.