基于α-Al_(2)O_(3)载体管的新型MXene膜异丙醇脱水性能  

Isopropanol dehydration performance of a novel MXene membrane based on aα-Al_(2)O_(3) carrier tube

作　　者：张国春 周志辉[1] 吴红丹[1] ZHANG Guochun;ZHOU Zhihui;WU Hongdan(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《化工进展》2023年第10期5381-5389,共9页Chemical Industry and Engineering Progress

基　　金：2020年度湖北省教育厅科学研究计划指导性项目(B2020019)。

摘　　要：二维过渡金属碳(氮)化合物MXene(Ti_(3)C_(2)T_(x))因其亲水性且层间距可调在膜分离领域得到了广泛关注,但层流状MXene膜易从基底上剥离,因而选取合适的基底材料并增加MXene膜与基底材料的黏附性是其工业应用的关键。以大孔α-Al_(2)O_(3)陶瓷管为载体,采用α-Al_(2)O_(3)颗粒和SiO_(2)-ZrO_(2)溶胶对其进行修饰,通过自交联反应制备得到MXene渗透汽化分离膜材料。探究了Ti_(3)C_(2)T_(x)纳米片负载量、异丙醇浓度、运行温度对MXene膜在异丙醇/水体系中渗透汽化分离性能的影响。结果表明:MXene纳米片形成的层状结构有利于阻隔大直径的异丙醇分子通过层间孔道,当MXene纳米片负载量为1.97mg/cm^(2)时,MXene膜在55℃对质量分数为90%的异丙醇/水溶液表现出较高的脱水性能,其渗透侧含水率为95.51%,通量可达485.13g/(m^(2)·h)。基于大孔α-Al_(2)O_(3)载体管的新型MXene膜结构稳定,分离性能良好,在渗透汽化有机溶剂脱水方面具有广阔的应用前景。Two-dimensional transition metal carbon(nitrogen)compound MXene(Ti_(3)C_(2)T_(x))has been widely concerned in the field of membrane separation because of its hydrophilicity and adjustable layer spacing.However,laminar flow MXene films are easy to be peeled off from the substrate.Therefore,the key to its industrial application is to select appropriate substrate materials and increase the adhesion between MXene films and substrate materials.The MXene pervaporation separation membrane material was prepared by self-cross-linking reaction usingα-Al_(2)O_(3)particles and SiO_(2)-ZrO_(2)sol as the support of macroporousα-Al_(2)O_(3)ceramic tube.The effects of Ti_(3)C_(2)T_(x) nanosheet loading,isopropanol concentration and operating temperature on the pervaporation separation performance of MXene membrane in isopropanol/water system were investigated.The results showed that:The layered structure formed by MXene nanosheets was conducive to blocking large diameter isopropanol molecules from passing through the interlayer pore.When the loading of MXene nanosheets was 1.97mg/cm^(2),MXene membrane exhibited high dehydration performance at 55℃for 90%isopropanol/water system,and the water content of the permeation side was 95.51%.The flux can reach 485.13g/(m^(2)·h).The new MXene membrane based on macroporousα-Al_(2)O_(3)carrier tube had stable structure and good separation performance,and had broad application prospects in pervaporation of organic solvent dehydration.

关 键 词：二维过渡金属碳(氮)化合物 Ti_(3)C_(2)T_(x)纳米片 α-Al_(2)O_(3)载体管 渗透汽化 异丙醇 分离 

分 类 号：TQ028[化学工程]