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High performance stainless steel-ceramic composite hollow fibres for microfiltration

High performance stainless steel-ceramic composite hollow fibres for microfiltration
High performance stainless steel-ceramic composite hollow fibres for microfiltration

Stainless steel (SS) is an attractive material for membrane applications due to its excellent mechanical strength and chemical resistance. Compared to inorganic materials such as ceramic, SS is highly flexible and tough, and is easy to handle at an industrial scale. Porous stainless steel hollow fibres can be fabricated by using the phase-inversion and sintering technique. While the sintering conditions have been well studied, success in achieving smaller pore size of SS hollow fibres remains limited, constraining their practical applications. In our study, we introduce ceramic nanoparticles to fill up the large pores around SS particles. A phase-inversion assisted co-extrusion technique has been used to fabricate dual-layer SS/SS-ceramic hollow fibres in one step. The outer layer is a mixture of SS and yttria-stabilized zirconia (YSZ), creating a separating layer with small pore sizes. The inner layer consists of SS, which provides a strong mechanical strength to the hollow fibres. The mean pore size of the composite hollow fibre membranes can be reduced to approximately 300 nm, much smaller than the pore size of single-layer SS hollow fibres, which is generally larger than 1 µm. With improved mechanical strength compared to pure ceramic hollow fibres, the dual-layer SS/SS-YSZ hollow fibre membranes are also highly porous and the pure water flux can reach as high as ~ 3000 LMH bar−1, making them attractive in microfiltration for value-added products.

Ceramic, Hollow fibre, Microfiltration, Stainless steel, Yttria-stabilized zirconia
0376-7388
425-433
Chong, Jeng Yi
2f9ead94-86f2-4e20-9e67-75f10759555b
Wang, Bo
55cee5a5-fd5f-4109-bc4d-06ee5e49e99f
Li, Kang
0f88a8e1-2691-46af-acb0-7176c79f5aa7
Chong, Jeng Yi
2f9ead94-86f2-4e20-9e67-75f10759555b
Wang, Bo
55cee5a5-fd5f-4109-bc4d-06ee5e49e99f
Li, Kang
0f88a8e1-2691-46af-acb0-7176c79f5aa7

Chong, Jeng Yi, Wang, Bo and Li, Kang (2017) High performance stainless steel-ceramic composite hollow fibres for microfiltration. Journal of Membrane Science, 541, 425-433. (doi:10.1016/j.memsci.2017.07.017).

Record type: Article

Abstract

Stainless steel (SS) is an attractive material for membrane applications due to its excellent mechanical strength and chemical resistance. Compared to inorganic materials such as ceramic, SS is highly flexible and tough, and is easy to handle at an industrial scale. Porous stainless steel hollow fibres can be fabricated by using the phase-inversion and sintering technique. While the sintering conditions have been well studied, success in achieving smaller pore size of SS hollow fibres remains limited, constraining their practical applications. In our study, we introduce ceramic nanoparticles to fill up the large pores around SS particles. A phase-inversion assisted co-extrusion technique has been used to fabricate dual-layer SS/SS-ceramic hollow fibres in one step. The outer layer is a mixture of SS and yttria-stabilized zirconia (YSZ), creating a separating layer with small pore sizes. The inner layer consists of SS, which provides a strong mechanical strength to the hollow fibres. The mean pore size of the composite hollow fibre membranes can be reduced to approximately 300 nm, much smaller than the pore size of single-layer SS hollow fibres, which is generally larger than 1 µm. With improved mechanical strength compared to pure ceramic hollow fibres, the dual-layer SS/SS-YSZ hollow fibre membranes are also highly porous and the pure water flux can reach as high as ~ 3000 LMH bar−1, making them attractive in microfiltration for value-added products.

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More information

Published date: 2017
Additional Information: Funding Information: The authors gratefully acknowledge the research funding provided by EPSRC in the United Kingdom (Grant no. EP/M022250/1). The authors also would like to thank Dr. Tao Li for the electrical conductivity measurement on the hollow fibre samples. Publisher Copyright: © 2017
Keywords: Ceramic, Hollow fibre, Microfiltration, Stainless steel, Yttria-stabilized zirconia

Identifiers

Local EPrints ID: 486374
URI: http://eprints.soton.ac.uk/id/eprint/486374
ISSN: 0376-7388
PURE UUID: 1c530106-1ccb-4816-b1e5-01e8c7b01e9a
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: Bo Wang
Author: Kang Li

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