Abstract

Polyether-block-amide (Pebax)/glycerol triacetate (GTA) blend membranes with various compositions were prepared with asolution-casting method. The gas-separation performance, thermal stability, and storage stability of the prepared membranes were investigatedat different pressures and temperatures. The Arrhenius equation was used to describe the gas-permeation performance of thePebax1074/GTA membranes with a low GTA concentration (≤40 wt %) rather than those membranes with a high GTA concentration(>40 wt %). A higher GTA content, lower treatment temperature, and storage temperature increased the gas permeability and induced astronger hydrostatic pressure effect. The low-storage temperature was beneficial for fixing GTA on the blend membrane.