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https://doi.org/10.1016/j.seppur.2007.12.002
Title: | Exploring Torlon/P84 co-polyamide-imide blended hollow fibers and their chemical cross-linking modifications for pervaporation dehydration of isopropanol | Authors: | Teoh, M.M. Chung, T.-S. Wang, K.Y. Guiver, M.D. |
Keywords: | Cross-linking Dehydration of isopropanol Hollow fiber Torlon Torlon/P84 co-polyamide-imide blends |
Issue Date: | 15-Jul-2008 | Citation: | Teoh, M.M., Chung, T.-S., Wang, K.Y., Guiver, M.D. (2008-07-15). Exploring Torlon/P84 co-polyamide-imide blended hollow fibers and their chemical cross-linking modifications for pervaporation dehydration of isopropanol. Separation and Purification Technology 61 (3) : 404-413. ScholarBank@NUS Repository. https://doi.org/10.1016/j.seppur.2007.12.002 | Abstract: | A research study has been conducted to fabricate and chemically modify Torlon® 4000T and Torlon/P84 co-polyamide-imide blended hollow fibers as new materials for the dehydration of isopropanol (IPA). It has been found that Torlon/P84 blends are miscible, as confirmed through the single glass transition temperatures (Tgs) detected by differential scanning calorimetry (DSC). Both pure and blended hollow fibers fabricated from the dry-jet wet-spinning process do not show sufficient resistance to suppress water and IPA induced swelling, whereas cross-linked pure Torlon hollow fibers show only marginal improvement. However, the Torlon/P84 blended fibers display enhanced separation performance after chemical cross-linking modification with the aid of p-xylenediamine. It is believed that the p-xylenediamine induced cross-linking reactions result in greater chain packing and the reduction of free volume. The highest separation factor obtained was 185 ± 8 for the 85/15 wt.% IPA/H2O feed solution and the total permeation flux obtained was 1000 ± 45 g/m2 h. © 2007 Elsevier B.V. All rights reserved. | Source Title: | Separation and Purification Technology | URI: | http://scholarbank.nus.edu.sg/handle/10635/88885 | ISSN: | 13835866 | DOI: | 10.1016/j.seppur.2007.12.002 |
Appears in Collections: | Staff Publications |
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