亚胺类COFs改性水处理膜的制备及应用进展

Progress in preparation and application of water treatment membranes modified with imine based covalent organic frameworks

共价有机框架(Covalent organic frameworks,COFs)是一种由C、H、O、N、B等第一、二周期的轻元素通过可逆的强共价键(C—C、C—O、C—Si、B—O)连接而成的新型多孔材料,具有可调孔径尺寸和多种官能团。近年来,已被用于水处理膜材料的改性制备中。简述了亚胺类COFs材料的制备与应用,着重介绍了亚胺类COFs改性膜在有机染料分离、海水淡化、渗透气化、重金属离子的去除和有机溶剂纳滤的最新应用进展,分析了亚胺类COFs材料在水处理膜中的作用机理。得出COFs改性水处理膜在水处理领域内由于制作成本高、膜孔径不合适、易被污染等问题导致研究较少的结论,解决以上问题是未来研究的重点。

Covalent organic frameworks(COFs)is a new type of porous material,which is composed of light elements with first and second periods,such as C,H,O,N and B,connected by reversible strong covalent bonds(C—C,C—O,C—Si,B—O),with adjustable pore size and various functional groups.In recent years,it has been used in the modi⁃fied preparation of water treatment membrane materials.In this paper,the preparation and application of imine type COFs materials were briefly introduced,and the latest application progress of imine based COFs modified mem⁃branes in organic dye separation,seawater desalination,pervaporation,heavy metal ion removal,and organic solvent nanofiltration was emphatically introduced,and the mechanism of COFs materials in water treatment membranes was analyzed.It was concluded that the COFs modified water treatment membrane had not been widely studied in the field of water treatment due to high production cost,inappropriate pore size,and easy to be contaminated.The above problems would be the focus of future research.