Gas separation through conductive polymer membranes. 2: Polyaniline membranes with high oxygen selectivity
- Hanyuang Univ., Seoul (Korea, Republic of). Dept. of Industrial Chemistry
- Kosin Univ., Pusan (Korea, Republic of). Dept. of Chemistry
Gas permeation experiments of O{sub 2} and N{sub 2} were performed with conducting polyaniline (PANi) composite membranes prepared by using a porous nylon membrane as a support. PANi composite membranes were easily obtained by a novel solvent welding process. Doping, dedoping, and redoping kinetics of PANi composite membranes were studied by calculating the [Cl]/[N] content using elemental analysis. After doping and dedoping processes, the permeability of a dedoped PANi membrane decreased while selectivity slightly increased, probably because f the changes in morphology of PANi. d spacing of the PANi film decreased from 4.89 to 3.67 {angstrom} after doping, dedoping, and redoping. As redoping continued, the degree of doping increased while the d spacing decreased, resulting in a dramatic increase in selectivity of a PANi membrane. The highest O{sub 2}/N{sub 2} selectivity and permeability were obtained from PANi redoped for 2 h were 28 and 0.13 barrer, respectively. O{sub 2}/N{sub 2} permeation experiments with different upstream pressure and temperature were carried out to study the permeation behavior of a PANi membrane.
- OSTI ID:
- 352668
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 38, Issue 5; Other Information: PBD: May 1999
- Country of Publication:
- United States
- Language:
- English
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