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From micro to nano: polyamide thin film on microfiltration ceramic tubular membranes for nanofiltration

From micro to nano: polyamide thin film on microfiltration ceramic tubular membranes for nanofiltration
From micro to nano: polyamide thin film on microfiltration ceramic tubular membranes for nanofiltration

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.

Ceramic membranes, Interfacial polymerization, Nanofiltration, Polyamide thin film
0376-7388
Chong, Jeng Yi
2f9ead94-86f2-4e20-9e67-75f10759555b
Wang, Rong
1f58a88c-01ff-4941-857a-427ee8c8aa62
Chong, Jeng Yi
2f9ead94-86f2-4e20-9e67-75f10759555b
Wang, Rong
1f58a88c-01ff-4941-857a-427ee8c8aa62

Chong, Jeng Yi and Wang, Rong (2019) From micro to nano: polyamide thin film on microfiltration ceramic tubular membranes for nanofiltration. Journal of Membrane Science, 587, [117161]. (doi:10.1016/j.memsci.2019.06.001).

Record type: Article

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.

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More information

Published date: 1 October 2019
Additional Information: Funding Information: The authors gratefully acknowledge the funding support from the Singapore Economic Development Board to the Singapore Membrane Technology Centre. Publisher Copyright: © 2019 Elsevier B.V.
Keywords: Ceramic membranes, Interfacial polymerization, Nanofiltration, Polyamide thin film

Identifiers

Local EPrints ID: 486377
URI: http://eprints.soton.ac.uk/id/eprint/486377
ISSN: 0376-7388
PURE UUID: eac275da-54bd-4521-a532-d1b8095a9404
ORCID for Jeng Yi Chong: ORCID iD orcid.org/0000-0002-0593-6313

Catalogue record

Date deposited: 18 Jan 2024 19:26
Last modified: 06 Jun 2024 02:20

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Contributors

Author: Jeng Yi Chong ORCID iD
Author: Rong Wang

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