Towards integrated anti-microbial capabilities: Novel bio-fouling resistant membranes by high velocity embedment of silver particles

Dumée, Ludovic F., He, Li, King, Peter C., Moing, Maelle Le, Güller, Isabelle, Duke, Mikel, Hodgson, Peter D., Gray, Stephen, Poole, Andrew J. and Kong, Lingxue 2015, Towards integrated anti-microbial capabilities: Novel bio-fouling resistant membranes by high velocity embedment of silver particles, Journal of membrane science, vol. 475, pp. 552-561.

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Title Towards integrated anti-microbial capabilities: Novel bio-fouling resistant membranes by high velocity embedment of silver particles
Author(s) Dumée, Ludovic F.ORCID iD for Dumée, Ludovic F.
He, Li
King, Peter C.
Moing, Maelle Le
Güller, Isabelle
Duke, Mikel
Hodgson, Peter D.
Gray, Stephen
Poole, Andrew J.
Kong, LingxueORCID iD for Kong, Lingxue
Journal name Journal of membrane science
Volume number 475
Start page 552
End page 561
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015
ISSN 0376-7388
Keyword(s) Anti-fouling surface
Anti-microbial activity
Hybrid membranes
Particle spray embedment
Science & Technology
Physical Sciences
Engineering, Chemical
Polymer Science
Summary Biofilm formation on membranes during water desalination operation and pre-treatments limits performance and causes premature membrane degradation. Here, we apply a novel surface modification technique to incorporate anti-microbial metal particles into the outer layer of four types of commercial polymeric membranes by cold spray. The particles are anchored on the membrane surface by partial embedment within the polymer matrix. Although clear differences in particle surface loadings and response to the cold spray were shown by SEM, the hybrid micro-filtration and ultra-filtration membranes were found to exhibit excellent anti-bacterial properties. Poly(sulfone) ultra-filtration membranes were used as for cross-flow filtration of Escherichia coli bacteria solutions to investigate the impact of the cold spray on the material[U+05F3]s integrity. The membranes were characterized by SEM-EDS, FT-IR and TGA and challenged in filtration tests. No bacteria passed through the membrane and filtrate water quality was good, indicating the membranes remained intact. No intact bacteria were found on hybrid membranes, loaded with up to 15. wt% silver, indicating the treatment was lysing bacteria on contact. However, permeation of the hybrid membranes was found to be reduced compared to control non-modified poly(sulfone) membranes due to the presence of the particles across the membrane material. The implementation of cold spray technology for the modification of commercial membrane products could lead to significant operational savings in the field of desalination and water pre-treatments.
Language eng
Field of Research 030108 Separation Science
Socio Economic Objective 869999 Manufacturing not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
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Document type: Journal Article
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