Polymer membranes are a flexible, processable, and inexpensive platform to provide a myriad of separations that fill critical roles in climate change mitigation (carbon capture) and resiliency (water treatment). For gas separations, polymer membranes have been widely used in the separation of mixtures in many industrial processes, including oxygen enrichment , biogas purification , and post-combustion carbon capture . In particular, carbon capture processes are garnering increased attention to reduce emissions to the environment, and membrane technologies offer known advantages such as high energy efficiency and operational simplicity due to flexibility and scalability . In post combustion, pre-combustion, and oxy-combustion, CO2/N2, CO2/H2, and O2/N2 separations are respectively important for environmental conservation.