Multilayer biopolymer membranes containing copper for antibacterial applications

de Paiva, Rafael G., de Moraes, Mariana A., de Godoi, Fernanda C. and Beppu, Marisa M. (2012) Multilayer biopolymer membranes containing copper for antibacterial applications. Journal of Applied Polymer Science, 126 Supp. 1: E17-E24. doi:10.1002/app.36666


Author de Paiva, Rafael G.
de Moraes, Mariana A.
de Godoi, Fernanda C.
Beppu, Marisa M.
Title Multilayer biopolymer membranes containing copper for antibacterial applications
Journal name Journal of Applied Polymer Science   Check publisher's open access policy
ISSN 0021-8995
1097-4628
Publication date 2012-10-25
Sub-type Article (original research)
DOI 10.1002/app.36666
Open Access Status
Volume 126
Issue Supp. 1
Start page E17
End page E24
Total pages 8
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Language eng
Abstract Chitosan/alginate multilayer dense membranes, with micrometric thicknesses, were produced by casting the solution of each polymer alternately on a Petri dish. Copper ions were also incorporated into these membranes, which were then characterized with regard to morphology, chemical and crystallographic structures, ions diffusivity, and bacteriostatic properties. Results indicate that the casting approach for multilayers production was successful, since the membranes produced were formed by organized and alternated polymer layers. The pH dependence of the metal adsorption resulted in a higher concentration of the copper in the alginate layers, as shown by SEM-EDS (scanning electron microscopy - energy dispersive X-ray spectroscopy) analysis. Fourier transformed infrared spectroscopy confirmed the Coulombic interaction between the chitosan amino groups and sodium alginate carboxyl groups. The copper ions were distributed homogeneously, without the formation of clusters, and were bound mainly to oxygen and nitrogen atoms located on the alginate and chitosan functional groups, respectively, according to extended X-ray absorption fine structure (EXAFS) results. The antibacterial properties of this membrane indicate that this material may hold promise for numerous applications, such as for water treatment or antibacterial functional coatings with controlled release.
Keyword Adsorption
Alginate
Biopolymers
Chitosan
Membranes
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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