Self-diffusion of water and fluorine ions in anion-exchange polymeric materials (membranes and resin) as determined by pulsed-field gradient nuclear magnetic resonance spectroscopy

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dc.contributor.authorVolkov V.I.
dc.contributor.authorPopkov Yu.M.
dc.contributor.authorTimashev S.F.
dc.contributor.authorBessarabov D.G.
dc.contributor.authorSanderson R.D.
dc.contributor.authorTwardowski Z.
dc.date.accessioned2011-05-15T15:59:42Z
dc.date.available2011-05-15T15:59:42Z
dc.date.issued2000
dc.description.abstractThe self-diffusion of water, ethanol and fluorine ions was studied by means of pulsed-field gradient nuclear magnetic resonance (PFG-NMR) spectroscopy in anion-exchange materials such as membranes and a resin containing quaternary amines as functional groups. Measurements were carried out with a NMR spectrometer at a frequency of 100MHz for 1H and 94.3MHz for 19F. The temperature dependence of the diffusion decay components in F- form membranes equilibrated with water or an aqueous solution of NH4FxHF was studied. The morphology of the transport channels in these materials and relationship between the structure of the membrane transport channels and self-diffusion of water and F- ions have been discussed. It was shown that the values of self-diffusion of fluorine ions in the membranes as determined by PFG-NMR are in good agreement with those obtained by means of electroconductivity measurements. Copyright (C) 2000 Elsevier Science B.V.The self-diffusion of water, ethanol and fluorine ions was studied by means of pulsed-field gradient nuclear magnetic resonance (PFG-NMR) spectroscopy in anion-exchange materials such as membranes and a resin containing quaternary amines as functional groups. Measurements were carried out with a NMR spectrometer at a frequency of 100 MHz for 1H and 94.3 MHz for 19F. The temperature dependence of the diffusion decay components in F- form membranes equilibrated with water or an aqueous solution of NH4F×HF was studied. The morphology of the transport channels in these materials and relationship between the structure of the membrane transport channels and self-diffusion of water and F- ions have been discussed. It was shown that the values of self-diffusion of fluorine ions in the membranes as determined by PFG-NMR are in good agreement with those obtained by means of electroconductivity measurements.
dc.description.versionArticle
dc.identifier.citationJournal of Membrane Science
dc.identifier.citation180
dc.identifier.citation1
dc.identifier.issn3767388
dc.identifier.other10.1016/S0376-7388(00)00400-2
dc.identifier.urihttp://hdl.handle.net/10019.1/11315
dc.subjectDiffusion
dc.subjectEthanol
dc.subjectFluorine
dc.subjectNuclear magnetic resonance spectroscopy
dc.subjectPolymeric membranes
dc.subjectResins
dc.subjectThermal effects
dc.subjectWater
dc.subjectDiffusion decay
dc.subjectIon exchange resins
dc.subjectamine
dc.subjectammonium fluoride
dc.subjectanion exchange resin
dc.subjectfluorine
dc.subjectfunctional group
dc.subjecthydrofluoric acid
dc.subjection
dc.subjectpolymer
dc.subjectwater
dc.subjectdiffusion
dc.subjectfluorine
dc.subjection exchange
dc.subjectnuclear resonance spectroscopy
dc.subjectpolymer
dc.subjectwater
dc.subjectanion exchange
dc.subjectaqueous solution
dc.subjectarticle
dc.subjectcontrolled study
dc.subjectdiffusion
dc.subjectdiffusion coefficient
dc.subjectmembrane
dc.subjectmembrane transport
dc.subjectmorphology
dc.subjectnuclear magnetic resonance spectroscopy
dc.subjectpriority journal
dc.subjectproton nuclear magnetic resonance
dc.subjectpulsed field gradient
dc.subjecttemperature
dc.titleSelf-diffusion of water and fluorine ions in anion-exchange polymeric materials (membranes and resin) as determined by pulsed-field gradient nuclear magnetic resonance spectroscopy
dc.typeArticle
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