化工学报2025，Vol.76Issue(12)：6439-6452,14.DOI:10.11949/0438-1157.20250266
利用空位和缺陷工程协同效应提高Pebax膜的CO2分离
Boosting CO2 separation of Pebax membranes with synergistic effect of vacancies and defects
摘要
Abstract
In view of the low surface porosity of 2D MoS2 nanosheets,the long interlayer stacking mass transfer path and the poor compatibility in polymers,it is difficult to simultaneously improve the selectivity and permeance of their mixed matrix membrane.In this paper,vacancy-and defect-rich MoS2(P-MoS2)was first prepared by ion imprinting technology,and 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole(AHMT)was used to modify P-MoS2 to prepare hybrid materials(AHMT-MoS2).Then,AHMT-MoS2 was added to polyether block polyamide(Pebax)to prepare cast film solution and then coated on polysulfone(mPSf)support to prepare mixed matrix composite membranes(Pebax/AHMT-MoS2).Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM)and N2 adsorption and desorption were used to characterize the chemical,morphological and pore structures of the materials and membranes.The effects of the preparation and testing conditions of the materials on gas separation were investigated.The results showed that Pebax/AHMT-MoS2 exhibited CO2 permeance of 818 GPU and CO2/N2 selectivity of 56.This was attributed to the construction of the defects on the surface of MoS2 by ion imprinting strategy,which increased the CO2 affinity;its surface pores could provide diffusion channels for CO2.In addition,introduction of amino and hydrazine groups enhances the reaction selectivity of CO2 and significantly improves the separation.Due to excellent gas separation performance and low cost,it makes as-prepared mixed matrix composite membranes highly potential for the application in CO2 separation.关键词
膜/分离/二氧化碳捕集/MoS2改性/离子印迹策略Key words
membranes/separation/carbon dioxide capture/MoS2 modification/ion imprinting strategy分类
化学化工引用本文复制引用
魏梦玥,张新儒,王永洪,李晋平..利用空位和缺陷工程协同效应提高Pebax膜的CO2分离[J].化工学报,2025,76(12):6439-6452,14.基金项目
国家自然科学基金面上项目(22078216) （22078216）
山西省基础研究计划资助项目(202403021211017) （202403021211017）
佛山市促进高校科技成果服务产业发展扶持项目(2024XCL04,2024XCL03) （2024XCL04,2024XCL03）
