Zeolitic imidazole framework (ZIF-8) was incorporated into poly(ether-block-amide) (Pebax-1657) in differing ratios to prepare mixed matrix membranes (MMMs) for gas separation. As ZIF-8 loading is increased, gas separation selectivity also gradually increases. For economic considerations, the proportion of the increase in selectivity to the amount of MOF loaded per unit was calculated. The results show that mixing 5% MOF gives the best unit performance. With this, a variety of MOFs (UiO-66, UiO-66-NH₂, A520, MIL-68(Al) and MIL-100(Fe)) were mixed with PEBAX at 5 loading to prepare MMMs. In this work, metal-organic frameworks (MOFs) were processed using the dry-free method, where in the synthesized MOF was not dried prior to incorporation. The gas separation performance test carried out shows the highest separation performance was exhibited by P-UiO-66, wherein the CO₂/N₂ gas selectivity was 85.94, and the permeability was 189.77 (Barrer), which was higher than Robeson’s Upper bound in 2008, and obtained a high permeability and selectivity among mixed matrix membranes. In the preparation of high quality MMMs for gas separation, details regarding the interface phenomenon were assessed.

To investigate the counter ion diffusivity of polymers with intrinsic microporous structures during the electrochemical process, Tröger's base (TB) with a non-planar and V-shaped moiety was introduced to facilitate the formation of diffusion channels. The TB-incorporated polyamides (TPPA-TB and TPPA-Me-TB) revealed enhanced electrochromic properties due to higher diffusivity, which could effectively narrow down the electrochemical redox potential difference (ΔE), resulting in a higher switching response speed (υ) while maintaining similar transmittance change (ΔT). Intriguingly, the triarylamine-based polyamide TPPA-Me-TB demonstrated excellent charge–discharge ability with a high specific capacitance (C_sp) of 165.3 F g⁻¹ at 1.0 A g⁻¹ and distinct two-stage color changes from colorless to green (0.8 V) and to blue (1.2 V), which could monitor the content of charge capacity. Therefore, these novel redox-active polyamides should be attractive and suitable for electrochromic supercapacitor (ECS) materials.