Abstract: Carbon nanotube (CNT) shows exceptional properties，such as high mechanical strength，large specific surface，and excellent transmission characteristics，which made it a good candidate for composite membrane preparation. After chemical modification，CNTs were functionalized and easily dispersed in membrane. With a brief introduction of the modification of carbon nanotubes and methods for preparing CNT-based composite membranes，the effects of the functionalized CNTs on hydrophilic，water flux，separation performance and the mechanical stability of membranes are reviewed in detail in this article. The recent development of CNT orientation in polymer membrane and its effect on the properties of membrane were also summarized. Due to the anisotropy of CNTs，using electric field，magnetic field and flow field to orientate the CNTs in membrane to make full use of its superior performance shall be the future focus of research on composite membrane.

Key words: carbon nanotubes, membranes, separation

摘要： 碳纳米管不仅具有优异的力学性质和超大的比表面积，同时具有优良的传输特性，将其添加到聚合物中制备复合分离膜，具有广阔的应用前景。通过化学改性将碳纳米管功能化，提高其在聚合物中的分散性，制备碳纳米管/聚合物复合膜。本文在介绍了碳纳米管功能化、碳纳米管/聚合物复合膜制备方法的基础上，综述了功能化碳纳米管的加入对复合分离膜亲水性、水通量、机械稳定性以及分离等性能的影响。总结了近年来对碳纳米管在聚合物膜内定向排列的研究进展及碳纳米管定向对复合膜相关性能的影响。由于碳纳米管材料的各向异性，利用电场、磁场及流场等对碳纳米管在聚合物膜内的分布进行定向，从而充分利用其优异的性能，是该类复合膜的研究方向。

关键词: 碳纳米管, 膜, 分离