Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/32570
Title: Ultrathin high-performance hollow fiber membranes
Authors: CHUNG, TAI-SHUNG 
HU, XUDONG
TEOH, SOO KHEAN 
Issue Date: 18-Jan-2000
Source: CHUNG, TAI-SHUNG,HU, XUDONG,TEOH, SOO KHEAN (2000-01-18). Ultrathin high-performance hollow fiber membranes. ScholarBank@NUS Repository.
Abstract: A process for forming ultrathin dense-layer asymmetric hollow fiber membranes with a dense layer of less than 500 .ANG. from a binary solution system comprising a polymer and a solvent. In this process, the spinning polymeric solution has a high viscosity and exhibits chain entanglement at the spinning temperature. The solubility parameter difference between the bore fluid and the spinning dope is less than 2.5 (cal/cm.sup.3).sup.0.5 and the volume ratio of bore-fluid flow rate to the dope flow rate is between 0.45 to 0.75. The dope is wet-spun into hollow fibers using water as external coagulant. The ultrathin dense-layer asymmetric hollow fiber membranes are suitable for air and other gas separations.
URI: http://scholarbank.nus.edu.sg/handle/10635/32570
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