Kevin A. Stevens

TL;DR: A new series of highly CO2-selective, amorphous PEO-containing segmented copolymers prepared from commercial Jeffamine polyetheramines and pentiptycene-based polyimide are reported, making them attractive for hydrogen purification and carbon capture.

TL;DR: In this paper, the influence of synthesis route and ortho-position functional group on the thermal rearrangement process and the fractional free volume of thermally rearranged (TR) polymers produced from polyimides derived from 3,3′-dihydroxy-4,4′)-diamino-biphenyl and 2,2′-bis-(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (HAB-6FDA).

TL;DR: A series of polybenzimidazoles containing sulfonyl groups were synthesized in Eaton's reagent for high temperature H2/CO2 separation membranes.

TL;DR: The membranes show rejection of NaCl and MgSO4 at higher ionic strengths than have previously been reported in CNT membranes, and specific size selectivity for analytes with diameters below 1.24 nm, suggesting that surface diffusion effects may begin to dominate gas selectivity at this size scale.

TL;DR: In this paper, gas permeability coefficients of thermally rearranged (TR) polymers derived from polyimides based on 3,3′-dihydroxy-4,4′-Diamino-biphenyl and 2,2′-bis-(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (HAB-6FDA) were reported.