With the development of science and technology

the utilization of fossil fuels is increasing rapidly. At the same time

it also brings many environmental problems. For example

a large amount of CO2 intensifies the greenhouse effect and global warming. Therefore

the separation

recovery and reuse of CO2 are of great significance to environmental protection. Membrane separation technology has the advantages of no phase change

simple operation

low energy consumption etc. and has good advantages in solving gas separation

recovery and reuse. Comparing different polymer materials

polyimide is a mature and commercialized polymer material with good mechanical properties

heat resistance

chemical corrosion resistance etc.

so it is widely used in the field of gas separation. The research status of the influence of polyimide gas separation membrane structure on gas permeability at home and abroad is summarized

the latest research progress of polyimide gas separation membrane containing fluorine atom

sulfonyl group

PIM structure and other structures is introduced in detail

and the preparation of high-performance polyimide gas separation membrane in the future is prospected.