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- W2401248810 abstract "Polyaniline (PANI)/Polyimide (PI) membranes were prepared and the effects of PANI contents and doping on the structural properties and gas separation properties were studied. The polyamic acid (PAA) solution was prepared by the polycondensation reaction of 4,4'-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and 4,4'-oxydianiline (ODA) in 1-methyl-2-pyrrolydinone (NMP) solvent. The PANI/PI blends were obtained by mixing PAA solution and PANI solution, and were doped with 1 M aqueous HCl solution for 24 h. The structural characterizations of the as-cast and doped membranes were examined by FT-IR, XRD, and TGA. The gas permeation experiments with H2, CO2, O2, N2, and CH4 were carried out by variable pressure method at 30 ℃ and 5 atm. For all gases tested, the permeability coefficients of the blends decreased with increasing PANI content and the magnitude of permeability was in the order of H2 > CO2 > O2 > N2 > CH4. The permeability for PANI/PI membranes decreased after the doping process while the permselectivity increased. For H2/CH4 separation, the doped PANI/PI (75/25) membrane has a permselectivity of 991." @default.
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- W2401248810 date "2007-01-01" @default.
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- W2401248810 title "Gas Separation Properties of Polyaniline/Polyimide Blend Membranes" @default.
- W2401248810 hasPublicationYear "2007" @default.
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