Water vapor and Gas Transport through Polymeric Membranes

Water vapor transport through polymeric materials plays an important role in a large number of applications such as: food packaging, breathable clothing, roofing membranes, diapers, and the removal of water vapor from gas streams (e.g. dehydration of natural gas or the drying of compressed air). Depending on the application a high or low permeability or selectivity is preferable. This thesis investigates the transport of water vapor and various gases through polyethylene oxide (PEO) polybutylene terephthalate (PBT) block copolymers and asymmetric polyether sulfone (PES) polyimide (PI) blend hollow fiber membranes