管式氧化石墨烯复合分离膜的制备及其液体分离性能的研究  

The Preparation and Liquid Separation Performance of Tubular Grapheme Oxide Composite Membrane

作　　者：杜红斌[1] 孔春龙[2] 陈亮[2] 曹端林[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《广东化工》2016年第6期15-17,共3页Guangdong Chemical Industry

摘　　要：首先利用热涂敷的方法在多孔氧化铝管式载体上制备纳米二氧化硅涂层,从而改善氧化铝管的孔尺寸及表面粗糙度。再采用抽真空的方法在修饰后的载体上制备氧化石墨烯分离膜。使用X射线衍射(XRD)、扫描电镜(SEM)和红外光谱(IR)对氧化石墨烯、二氧化硅涂层及复合分离膜进行了的结构及形貌表征。结果表明,采用二氧化硅修饰后的载体有利于获得致密的石墨烯膜。将所制备的氧化石墨烯膜用于染料和盐的水溶液分离研究,实验结果表明氧化石墨烯膜对甲基橙、亚甲基蓝和罗丹明B的截留率达到99%以上,对水的渗透通量达到0.5 kg/(m2*h*bar)。连续渗透实验结果表明,制得的氧化石墨烯膜在30 h后渗透性能达到稳定,连续运行100 h后,膜的选择性以及渗透通量基本上保持不变,说明制备的氧化石墨烯膜具有良好的稳定性。A nano-silica layer was prepared on the tube by a hot coating method to improve the pore size and surface roughness of porous ceramic tube,. And then, graphene oxide membrane was fabricated on the modified tube via a vacuum filtration method. The structure and morphology of as-prepared graphene oxide, silica layer and graphene oxide membrane were characterized by infared spectrum（IR）, scanning electron microscope（SEM） and X-ray diffraction（XRD）, respectively. Results show that the coated silica layer is beneficial to fabricate a compact graphene oxide membrane. The as-prepared membrane was further applied in dye and salts solution separation. Results show that the membrane displays a high rejection（〉99 %） for methylene blue, methyl orange and rhodamine B. Water flux of the membrane is 0.5 kg·m^（-2）·h^（-1）·bar^（-1）. As for permeation experiment, the separation performance of graphene oxide membrane reaches a steady after 30 hours. Rejection and permeation flux of the membrane are only changed slightly after continuous running of 100 hours, indicating the as-prepared membrane has a good stability.

关 键 词：二氧化硅涂层 氧化石墨烯膜 抽真空法 截留率 渗透通量 

分 类 号：TQ028[化学工程]