Abstract: Polysulfone supporting layers incorporated with graphite(GI),graphene(GE),and graphene oxide(GO)were respectively prepared by phase inversion method. Then the polyamide active layers were prepared via interfacial polymerization of m-phenylenediamine and trimesoyl chloride on the supporting layers. The morphologies of top surface and cross section of the membranes were characterized by SEM. The porosity,hydrophilicity and performance of FO membranes with different incorporated additives were investigated. The results showed that the structures of the cross section of the supporting layers incorporated with GE or GO were looser,resulting in increased porosity and pure water permeability(PWP)constant. Thus the properties of corresponding FO membranes were improved. However,the incorporating of GI resulted in the prepared membrane with rough surface,dense cross section,lower PWP constant,and worse performance. The FO membrane prepared on the supporting layer incorporated with GO exhibited the best performance. The water flux reached 37.10L/(m²·h) under the AL-DS membrane orientation,increased by 38.7% compared with FO membrane prepared on pure polysulfone substrate.

Key words: graphene oxide, incorporation, forward osmosis, membrane, structure, performance

摘要： 采用相转化法分别制备了掺杂有石墨、石墨烯和氧化石墨烯的聚砜正渗透（FO）膜支撑层，通过间苯二胺和均苯三甲酰氯间的界面聚合在支撑层表面制备了聚酰胺活性层。采用扫描电子显微镜（SEM）表征膜表面和断面的结构形貌，测定膜孔隙率和亲水性，考察不同掺杂物时FO膜的性能。结果表明，掺杂石墨烯和氧化石墨烯，支撑层断面结构更加疏松，孔隙率和纯水透过常数（PWP）明显增加，制备的相应FO膜性能得到改善，水通量增大。掺杂石墨则导致支撑层上表面变粗糙，断面结构密实，其孔隙率减小，PWP值降低，膜性能变差。其中，掺杂了氧化石墨烯的FO膜表现出最好的性能，水通量在活性层朝向驱动液侧（AL-DS）模式下可达37.10L/（m²·h），相比无掺杂FO膜增加了38.7%。

关键词: 氧化石墨烯, 掺杂, 正渗透, 膜, 结构, 性能