Dha Tab-COF filled PEBAX mixed matrix membranes for effective CO_(2)/CH_(4)separation  

作　　者：Yuankai Pan Xingmei Zhang Wenwen He Lan Zheng Xiaolong Han 

机构地区：[1]School of Chemical Engineering,Northwest University,Xi'an 710069,China [2]School of Chemical Engineering,Xi'an University,Xi'an 710065,China [3]School of Chemistry and Life Science,Advanced Institute of Materials Science,Changchun University of Technology,Changchun 130012,China

出　　处：《Chinese Journal of Chemical Engineering》2025年第1期123-134,共12页中国化学工程学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.22271022,No 22378327).

摘　　要：Covalent organic skeletons(COFs)have been widely used in gas separation due to their excellent pore structure,high crystallinity,and high specific surface area.In this work,Dha Tab-COF was synthesized by solvothermal method and filled in polyether block polyamide(PEBAX)to form mixed matrix membranes(MMMs).Various characterization methods such as Fourier transform infrared spectroscopy(FT-IR),Xray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM)and X-ray diffractometry(XRD)were used to characterize the structure of Dha Tab-COF as well as the MMMs.The effects of operating pressure,operating temperature and the content of Dha Tab-COF particles on the CO_(2)/CH_(4)separation performance of the membranes were investigated.The best separation performance with a CO_(2)permeability of 295.8 barrer(1 barrer=7.52×10^(-18)m^(3)·(STP)·m^(-2)·m·s^(-1)·Pa^(-1))and a CO_(2)/CH_(4)selectivity of 21.6 was achieved when the Dha Tab-COF content is 2%(mass),which were 45.7%and 108.1%higher than that of the pure PEBAX membrane,respectively.

关 键 词：Covalent organic framework(COFs) Polyether block polyamide(PEBAX) Mixed matrix membranes CO_(2)separation membrane 

分 类 号：O63[理学—高分子化学]