Selectivity and Permeability of Microporous Block Copolymer Membranes
Abstract
A selective solvent was used to develop a uniform microporous structure in a polystyrene-polymethylmethacrylate block copolymer. Pore diameters in the range of 200-500 angstroms were produced. Gas permeation measurements demonstrated a dramatic, five order of magnitude, increase in permeability coefficient associated with the throughgoing microporous structure. These high-flux membranes retained some selectivity for certain gas pairs as expected for transport based on Knudsen diffusion in the porous materials.... Microporous membranes, Gas separations, Knudsen diffusion, Block copolymers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 16, 1993
- Accession Number
- ADA263189
Entities
People
- D. H. Rein
- R. F. Baddour
- Robert E. Cohen
Organizations
- Massachusetts Institute of Technology