Polyetheramine-polyhedral oligomeric silsesquioxane organic-inorganic hybrid membranes for CO2/H2 and CO2/N2 separation

► Composite polyetheramine-polyhedral oligomeric silsesquioxane membranes. ► POSS particles are distributed uniformly across the membranes. ► The membranes exhibit reduced crystallinity and enhanced mechanical strength. ► A high CO2 permeability of 380 Barrer with moderate CO2/N2 and CO2/H2 selectivity is achieved. ► Effects of composition, temperature and pressure on gas transport are investigated.