Enhancement of CO2 capture by polyethylene glycol-based polyurethane membranes

Poly (ethylene glycol) (PEG)-based polyurethane (PU) membranes are attractive materials for CO2 separation from various sources such as flue gas and syngas. However, the strong tendency of PEG chains to crystallize leads to reduced permeability of the membrane. Here, we developed new types of PU chemistries with high PEG content and reduced crystallinity. A series of PUs were synthesized based on mixtures of PEG and poly (propylene glycol)...