石墨烯掺杂聚砜基正渗透膜的结构和性能  

Structure and performance of forward osmosis membranes based on polysulfone substrates incorporated with graphene

作　　者：胡念 左浩然 付佳蓓 吕慧[1] 童奕皓 刘慧清 曹贵平[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《化工进展》2017年第12期4524-4532,共9页Chemical Industry and Engineering Progress

基　　金：上海市教育委员会科研创新重点项目(14ZZ062);国家级大学生创新创业训练计划(20121025104);华东理工大学大学生创新创业训练计划(x17028;x17001);华东理工大学大学生课余研究计划(20160421)项目

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/(m^2×h),相比无掺杂FO膜增加了38.7%。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 37.10 L/（m^2×h） under the AL-DS membrane orientation,increased by 38.7% compared with FO membrane prepared on pure polysulfone substrate.

关 键 词：氧化石墨烯 掺杂 正渗透 膜 结构 性能 

分 类 号：TQ028.8[化学工程]