A prospective study on the application of thermally rearranged acetate-containing polyimide membranes in dehydration of biofuels via pervaporation

► TR-PBO membranes with high permeation flux for dehydration of biofuels were fabricated. ► The free volume and d-spacing of the membranes increase after the TR process. ► TR-PBO membranes showed a stable performance in dehydration of IPA and n-butanol.