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Title: Thin-film composite hollow fibre membrane for low pressure organic solvent nanofiltration
Authors: Goh, Keng Siang
Chong, Jeng Yi
Chen, Yunfeng
Fang, Wangxi
Bae, Tae-Hyun
Wang, Rong
Keywords: Engineering::Civil engineering
Issue Date: 2020
Source: Goh, K. S., Chong, J. Y., Chen, Y., Fang, W., Bae, T. & Wang, R. (2020). Thin-film composite hollow fibre membrane for low pressure organic solvent nanofiltration. Journal of Membrane Science, 597, 117760-.
Journal: Journal of Membrane Science
Abstract: Polyamide thin film membranes have shown outstanding performance in organic solvent nanofiltration (OSN). However, it is still challenging to produce polyamide hollow fibres for OSN, mainly due to limited solvent resistance of hollow fibre substrates and the difficulty to synthesize polyamide thin film on the surface of hollow fibre substrates. In this study, polyamide-based hollow fibre composite members for low pressure OSN were successfully developed. Solvent resistant polyimide hollow fibre substrates were first prepared through a non-solvent induced phase separation process, followed by chemical cross-linking with hexamethylene diamine. A polyamide thin film layer was then synthesized via interfacial polymerization, by circulating the reactant monomers including polyethyleneimine (PEI), piperazine (PIP) and trimesoyl chloride (TMC) through the hollow fibre lumen. The polyamide thin film with a thickness of ~60 nm was formed on the inner surface of the hollow fibre substrates. The membranes exhibited excellent nanofiltration (NF) performance under 2 bar operating pressure. The permeability of water, acetone and isopropanol was 6.8, 11.6 and 4.5 l m−2 h−1 bar−1, respectively. The membranes also achieved 99.9% and 91.8% rejection to rose bengal (1017 Da) and acid fuchsin (585 Da), respectively, in acetone. Furthermore, a 72-h filtration test was conducted and the membrane showed steady performance throughout the testing period. This study demonstrates the possibility of fabricating polyamide hollow fibre membranes for organic solvent nanofiltration at low pressure, which is desirable for practical applications.
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2019.117760
Rights: © 2019 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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