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Qualitative spectroscopic characterization of the matrix-silane coupling agent interface across metal fibre reinforced ion exchange resin composite membranes
journal contribution
posted on 2014-01-01, 00:00 authored by Ludovic Dumee, Francois-Marie Jacques Allioux, R Reis, M Duke, S Gray, M Tobin, L Puskar, Li He, Peter HodgsonPeter Hodgson, Lingxue KongLingxue KongThe characterization of novel metal reinforced electro-dialysis ion exchange membranes, for water desalination, by attenuated total reflectance Fourier transform infrared spectroscopy mapping is presented in this paper. The surface of the porous stainless steel fibre meshes was treated in order to enhance the amount of surface oxide groups and increase the material hydrophilicity. Then, the metal membranes were functionalized through a sol-gel reaction with silane coupling agents to enhance the affinity with the ion exchange resins and avoid premature metal oxidation due to redox reactions at the metal-polymer interface. Polished cross sections of the composite membranes embedded into an epoxy resin revealed interfaces between metallic frameworks and the silane layer at the interface with the ion exchange material. The morphology of the metal-polymer interface was investigated with scanning electron microscopy and Fourier transform infrared micro-spectroscopy. Fourier transform infrared mapping of the interfaces was performed using the attenuated total reflectance mode on the polished cross-sections at the Australian Synchrotron. The nature of the interface between the metal framework and the ion exchange resin was shown to be homogeneous and the coating thickness was found to be around 1 μm determined by Fourier transform infrared micro-spectroscopy mapping. The impact of the coating on the properties of the membranes and their potential for water desalination by electro-dialysis are also discussed.
History
Journal
Vibrational SpectroscopyVolume
75Pagination
203 - 212Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0924-2031Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2014, ElsevierUsage metrics
Categories
No categories selectedKeywords
Corrosion resistanceFTIR mappingMetal surface chemistryOrganic-inorganic interface characterizationSilane coupling agent graftingScience & TechnologyPhysical SciencesTechnologyChemistry, AnalyticalChemistry, PhysicalSpectroscopyChemistryOrganic-inorganic interfacecharacterizationTECHNOLOGIESPOLYSTYRENEWATER
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