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

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 cycl...

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Bibliographic Details
Published in:Journal of membrane science 2005-06, Vol.255 (1), p.33-47
Main Authors: Tsai, H.A., Ciou, Y.S., Hu, C.C., Lee, K.R., Yu, D.G., Lai, J.Y.
Format: Article
Language:English
Subjects:
Cyclization
Heat-treatment
Hollow fiber membrane
Pervaporation
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Summary: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.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2004.09.052