Research progress on the stability of Pebax-based mixed matrix membranes for CO2 separation
Membrane technology for carbon dioxide capture and separation with advantages of high efficiency,energy saving and economic becomes the current hot research topic.Polymer membranes have been widely commercialized because of their high processability and low cost,but they have the problem of"trade-off"effect of permeability and selectivity,that is,highly permeable membranes have low selectivity,and vice versa.The mixed matrix membrane prepared by adding porous materials to polymer matrix can improve the gas permeability and selectivity at the same time,which has become a research trend in the field of gas separation membrane.In this paper,the research progress on the stability of mixed matrix membranes prepared by polyether block polyamide(Pebax)as polymer matrix and porous materials as fillers was reviewed.The chemical stability of zeolite,metal-organic frameworks and covalent organic frameworks in the presence of water,acid,alkali and organic solvent was summarized and their mechanisms were explained.This paper focused on the current status of the research on the moisture resistance and long-term stability of Pebax mixed matrix membranes during CO2 separation.Finally,aiming at the development of membrane stability in the field of gas separation,research focuses were put forward on the porous materials and membrane in basic research,and the research directions for theory of cross experiment and diversified means to evaluate membrane stability were pointed out.In addition,strategies to improve membrane stability were proposed from the design and preparation of fillers and polymers,aiming to further improve the separation stability of Pebax mixed matrix membrane for CO2 mixed gas.
CO2 separationporous materialspolyether block polyamide(Pebax)mixed matrix membranesstability
国家科技期刊平台
NSTL
万方数据
