凝胶修饰结合同源金属诱导制备UiO-66气体分离膜  

Preparation of UiO-66 gas separation membrane by gel modification combined with homologous metal induction

作　　者：丁小凡 鲁金明 杨建华 刘毅 DING Xiaofan;LU Jinming;YANG Jianhua;LIU Yi(State Key Laboratory of Fine Chemicals,Institute of Adsorption and Inorganic Membrane,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学吸附与无机膜研究所,精细化工国家重点实验室,大连116024

出　　处：《膜科学与技术》2023年第4期28-36,共9页Membrane Science and Technology

基　　金：国家自然科学基金项目(21776031)。

摘　　要：金属有机骨架化合物UiO-66具有孔隙率高、孔道尺寸可调、优良的化学稳定性和热稳定性等特点,是理想的膜分离材料,在气体膜分离领域具有很高的应用价值.针对在大孔载体上难以制备连续完整的UiO-66膜的问题,采用凝胶修饰载体和同源金属氧化物诱导相结合的方式,在大孔氧化铝载体上制备致密的UiO-66膜,通过SEM、XRD、EDX等探究了Zr溶胶浓度和合成液组成等因素对成膜的影响,并与传统晶种生长法成膜过程进行了对比.实验结果表明,Zr溶胶的最佳质量浓度为0.16 g/mL,合成液乙酸最佳摩尔比为1∶100,所制备的膜在0.1 MPa条件下,H_(2)的渗透速率为6.20×10^(-8)mol/(m^(2)·s·Pa),H_(2)/CO_(2)、H_(2)/N_(2)、H_(2)/CH4的理想选择性分别为20.79、2.42、2.02.The metal-organic framework UiO-66 is an ideal membrane separation material with high porosity,adjustable pore size,excellent chemical and thermal stability,and has high application value in the field of gas membrane separation.In this paper,for the difficulty of preparing continuous and complete UiO-66 membranes on microporous carriers,a combination of gel-modified support and homologous metal oxide induction was used to prepare dense UiO-66 membranes on microporous alumina support,and the effects of Zr-sol and synthesis solution on the membrane formation were investigated by SEM,XRD,EDX,etc.,and compared with the membrane formation process by traditional seed growth method.The experimental results showed that the optimal content of Zr-sol was 0.16 g/mL,the optimal molar ratio of synthesis solution acetic acid was 1:100,the permeation of H_(2)was 6.20×10^(-8)mol/(m^(2)·s·Pa)at 0.1 MPa,and the ideal selectivity of H_(2)/CO_(2),H_(2)/N_(2),and H_(2)/CH4 were 20.79,2.42,and 2.02,respectively.

关 键 词：UiO-66膜 气体分离 凝胶修饰 同源金属诱导 CO_(2)分离 

分 类 号：TQ028.8[化学工程]