▎ 摘　　要

Due to the controllable nanoscale channels and unique separation performance, the separation films assembled from graphene oxide ( GO) nanosheets are promising separation materials, but the unsatisfactory mechanical properties restrict their practical application. Introducing particles such as active molecules and cations between the GO nanosheets can improve the mechanical properties of the GO membranes due to the formation of the stable bonding. In this review, the recent progress on the methods for improving the mechanical properties of GO membranes is summarized. According to the bonding mode between GO and the introduced particles, these methods can be divided into two types, covalent bonding and non-covalent bonding. Furthermore, covalent bonding methods can be divided into macromolecular covalent bonding and small molecule covalent bonding, while noncovalent bonding methods include hydrogen bonding, pi-pi bonding and ionic bonding. Both covalent bonding and noncovalent bonding can significantly improve the mechanical properties of the GO films, while the covalent bonding methods are more effective. Among the covalent bonding methods, the macromolecule covalent bonding is superior to the small molecule covalent bonding. Finally, the major problems of the current methods for enhancing the mechanical property of GO are discussed, and the future prospects is proposed.