This poster on the UKCCSRC Call 1 project Mixed matrix membranes for post-combustion carbon capture was presented at the CSLF Call project poster reception, London, 27.06.16. Grant number: UKCCSRC-C1-19. • This work aims to develop an understanding of the gas transport mechanisms within mixed matrix membranes focussing on membranes for post-combustion carbon capture. • Separation of carbon dioxide from combustion flue gases using selective membranes shows promise to be a low energy carbon capture option and is proven as a commercially viable gas separation technology. • Membranes potentially offer significant energy savings over the currently more developed amine-based absorption technologies. • Mixed matrix membranes (MMMs) are composite materials comprised of particulate fillers in a polymeric matrix. • Polymer membranes exhibit a trade-off between permeability and selectivity. By adding fillers the gas separation properties of the membrane can be altered and improved. • MMMs are fabricated from various materials and the gas permeation properties tested such that the interaction of phases can be investigated.