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Formation of defect-free polyimide hollow fiber membranes for gas separations

Tipo de material: TextoTextoSeries ; Journal of Membrane Science, 167(1), p.79-89, 2000Trabajos contenidos:
  • Clausi, T.D
  • Koros, W.J
Tema(s): Recursos en línea: Resumen: Ultra-thin and defect-free polyimide hollow fiber membranes were formed using a dry-jet, wet quench process with spin dopes both with and without volatile solvents. Fibers were spun from the commercially available polyimide, Matrimid® 5218, and were precipitated in an aqueous quench bath. Spin dopes comprised volatile and non-volatile solvents, polymer, and non-solvent. The influences of dope composition, spinning parameters, and dehydration procedures on the membrane morphology and performance were investigated. Without post-treatment (i.e., defect repair), the fibers exhibited skin thicknesses on the order of 1000 Å and O2/N2 selectivities ranging from 90 to 100
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Documentos solicitados Documentos solicitados CICY Documento préstamo interbibliotecario Ref1 B-6319 (Browse shelf(Opens below)) Available

Ultra-thin and defect-free polyimide hollow fiber membranes were formed using a dry-jet, wet quench process with spin dopes both with and without volatile solvents. Fibers were spun from the commercially available polyimide, Matrimid® 5218, and were precipitated in an aqueous quench bath. Spin dopes comprised volatile and non-volatile solvents, polymer, and non-solvent. The influences of dope composition, spinning parameters, and dehydration procedures on the membrane morphology and performance were investigated. Without post-treatment (i.e., defect repair), the fibers exhibited skin thicknesses on the order of 1000 Å and O2/N2 selectivities ranging from 90 to 100

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