Fig. 5From: Gas Transport Properties of Polybenzimidazole and Poly(Phenylene Oxide) Mixed Matrix Membranes Incorporated with PDA-Functionalised Titanate NanotubesCross sections and surface image of PBI (a, b), PBI-PDA-TiNT 6 wt.% (c, d), PPO (e, f), and PPO-PDA-TiNT 6 wt.% (g, h)Back to article page