Heat-treatment effect on the morphology and pervaporation performances of asymmetric PAN hollow fiber membranes

✍ Scribed by H.A. Tsai; Y.S. Ciou; C.C. Hu; K.R. Lee; D.G. Yu; J.Y. Lai

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 987 KB
• Volume: 255
• Category: Article
• ISSN: 0376-7388
• DOI: 10.1016/j.memsci.2004.09.052

✦ Synopsis

The influence of heat-treatment conditions on the morphology and pervaporation performances of aqueous isopropanol (IPA) solution through wet spinning prepared polyacrylonitrile (PAN) hollow fiber membranes were investigated. At heat-treatment temperature higher than 210 • C, dehydrogenation and cyclization reaction of the PAN molecular occurred during the heat-treatment process. The SEMs observation depicts that the morphology of heat-treated PAN hollow fiber membranes was denser with increasing the heat-treatment temperature. The permeation rate and water concentration in the permeate for a 90 wt.% aqueous isopropanol solution through the heat-treated PAN hollow fiber membranes at 120 • C for 12 h were 186 g/m 2 h and 99.2 wt.%, respectively.