PEI membrane and UiO-66-NH2/PEI hollow fiber gas separation membrane are respectively prepared via a dry-wet conversion spinning method with polyetherimide(PEI)as continuous phase and high specific surface area,nano-size UiO-66-NH2 as the dispersed phase.The effects of UiO-66-NH2 on the structure and properties of hollow fiber membranes are studied by means of FT-IR,XRD and SEM.It is shown that the transition layer structure of the hollow fiber membrane changes from dendritic structure to bubble-like structure due to the addition of UiO-66-NH2.The CO2 permeance of UiO-66-NH2/PEI hollow fiber membrane increases from 8.09 GPU to 32.09 GPU while the CO2/N2 selectivity of UiO-66-NH2/PEI hollow fiber membrane remains basically the same as that of PEI hollow fiber membrane.
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