基于ZIF-8固定载体复合膜的制备及CO_(2)分离性能研究  

Study on preparation of fixed carrier composite membrane based on ZIF-8 and CO_(2) separation performance

作　　者：冯孝权 赵倩倩[1] 张亚涛[1] FENG Xiaoquan;ZHAO Qianqian;ZHANG Yatao(School of Chemical Engineering,Zhengzhou Key Laboratory of Advanced Separation Technology,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学化工学院,郑州市先进分离技术重点实验室,郑州450001

出　　处：《膜科学与技术》2021年第4期35-41,48,共8页Membrane Science and Technology

基　　金：国家自然科学基金项目(U1704139)。

摘　　要：制备高效分离CO_(2)/N_(2)的气体分离膜一直是气体膜分离领域中的研究热点.采用简便的滴涂制膜方法,以聚砜(PSf)超滤膜为底膜、聚二甲基硅氧烷(PDMS)为过渡层,在制备PVAm-PEA分离功能层过程中直接引入ZIF-8纳米颗粒,制备了高选择性分离CO_(2)/N_(2)的新型固定载体复合膜.通过表征和性能测试,考察分析ZIF-8及其含量对复合膜形貌与气体渗透性能的影响.结果表明,ZIF-8颗粒的加入使复合膜表面形貌较空白膜粗糙,CO_(2)渗透速率降低了43%,CO_(2)/N_(2)分离因子增加了220%.在0.1 MPa条件下,ZIF-8质量分数为0.05%时,CO_(2)渗透速率为59 GPU,CO_(2)/N_(2)分离因子为202.The preparation of CO_(2)separation membrane with high efficiency is one of unremitting pursuits and hot topics for researchers.PSf ultrafiltration membrane was used as the bottom membrane and PDMS was coated on the PSf bottom membrane as the"gutter layer",ZIF-8,a crystalline porous material,was introduced to prepare PVAm-PEA separate functional layer for efficient separation of CO_(2)/N_(2)by dropcoating method.Through a series of characterization and tests,the effects of ZIF-8 and content on the gas permeation of CO_(2)/N_(2)were investigated.Results showed that the surface morphology of the composite film was coarser than that of the blank film,the CO_(2)permeation reduces 43%and the separation coefficient of CO_(2)/N_(2)increases 220%.The content of ZIF-8 is mass fraction 0.05%,which the maximum separation factor can up to be 202,measured at 0.1 MPa,and the maximum permeation rate of CO_(2)can also reach 59 GPU.

关 键 词：滴涂法 ZIF-8 固定载体 复合膜 CO_(2)分离 

分 类 号：TQ028.8[化学工程]