TY  - BOOK
AU  - Clausi,T.D.
AU  - Koros,W.J.
TI  - Formation of defect-free polyimide hollow fiber membranes for gas separations
KW  - DRY/WET PHASE INVERSION; ASYMMETRIC MEMBRANES; GAS SEPARATION; HOLLOW FIBER MEMBRANES; POLYIMIDE
N2  - 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
UR  - https://drive.google.com/file/d/18aaPnQqruuT0xRr1lMPbYv1kyQXK3GEv/view?usp=drivesdk
ER  -