TPX/siloxane blend membrane for oxygen enrichment

Abstract The effects of composition, molecular weight, and milling temperature on homogeneity, gas permeability, selectivity of oxygen/nitrogen, and mechanical strength of the TPX/siloxane blend membranes were studied. By adjusting the blending conditions and hence controlling the homogeneity, the gas permeability of TPX membrane was significantly improved without loss of oxygen/nitrogen selectivity. The oxygen permeability of 1.57 × 10 −8 cm 3 (STP) cm/cm 2 s cm Hg and the oxygen/nitrogen permeation ratio of 6.92 can be obtained under the condition of TPX (MX‐001)/siloxane (75,000 MW) = 9/1 at 65°C milling temperature. This membrane possesses 133 kg/cm 2 tensile strength and 92% elongation. The morphology of the blend membranes was studied.