Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/150381
Title: From micro to nano : polyamide thin film on microfiltration ceramic tubular membranes for nanofiltration
Authors: Chong, Jeng Yi
Wang, Rong
Keywords: Engineering::Environmental engineering
Issue Date: 2019
Source: Chong, J. Y. & Wang, R. (2019). From micro to nano : polyamide thin film on microfiltration ceramic tubular membranes for nanofiltration. Journal of Membrane Science, 587, 117161-. https://dx.doi.org/10.1016/j.memsci.2019.06.001
Journal: Journal of Membrane Science 
Abstract: Interfacial polymerization is an effective technique to synthesize high performance polyamide thin film membranes. However, it is still very challenging to apply this technique on ceramic hollow fibres or tubular membranes, especially when the substrate pore size is in the microfiltration range. In this study, we demonstrated that thin polyamide layer can be synthesized directly on microfiltration ceramic tubular membranes with a surface pore size of 0.1–0.2 μm via interfacial polymerization without an intermediate layer. A thin polyamide layer with a thickness 30–40 nm was coated on the inner surface of the ceramic substrate by circulating the monomers of branched polyethyleneimine (PEI), piperazine (PIP), and trimesoyl chloride (TMC) through the membrane lumen. The thin film layer showed good integration with the ceramic substrate and could withstand high pressure of at least 10 bar. The mechanical property of the polyamide layer was examined using AFM and the modulus was measured. The thin film composite membranes demonstrated excellent nanofiltration performance with a pure water permeability of 16–18 LMH bar−1 and a molecular weight cut-off of ∼250 Da. The membranes also showed good salt rejections (>90%) to CaCl2, MgCl2 and MgSO4, and still maintained high rejections of MgCl2 and sucrose at elevated temperature of 80 °C. The use of highly inert ceramic substrates has enabled the application of polyamide membranes under more challenging conditions.
URI: https://hdl.handle.net/10356/150381
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2019.06.001
Rights: © 2019 Elsevier B.V. All rights reserved. This paper was published in Journal of Membrane Science and is made available with permission of Elsevier B.V.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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