石墨烯掺杂聚砜基正渗透膜的结构和性能

发布时间：2018-06-07 23:48

本文选题：氧化石墨烯 + 掺杂　；参考：《化工进展》2017年12期

【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%。
[Abstract]:The polysulfone positive permeation (FO) membrane supported layer with graphite, graphene and graphene oxide was prepared by phase transformation. The polyamide active layer was prepared on the surface of the support layer through the interfacial polymerization of benzyl two amine and benzyl trimethyl chloride. The structure and morphology of the surface and section of the membrane were characterized by scanning electron microscope (SEM), and the membrane pore was measured. The performance of FO films with different dopants was investigated. The results showed that the cross section structure of the supporting layer was more loose, the porosity and the pure water permeation constant (PWP) increased obviously. The properties of the corresponding FO films were improved and the water flux increased. The surface of the supporting layer was rough and the cross section of the support layer became rough. The structure is dense, its porosity decreases, the PWP value decreases, and the membrane performance becomes worse. Among them, the FO film doped with graphene oxide shows the best performance. The water flux can reach 37.10L/ (m~2 * h) under the driving liquid side (AL-DS) mode of the active layer, and the increase of 38.7% compared to the undoped FO film.
【作者单位】：华东理工大学化学工程联合国家重点实验室;
【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
【分类号】：TQ051.893

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