Hydration of paper studied with solid-state magnetisation-exchange H-1 NMR spectroscopy

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dc.contributor.authorGarvey, CJen_AU
dc.contributor.authorParker, IHen_AU
dc.contributor.authorSimon, GPen_AU
dc.contributor.authorWhittaker, AKen_AU
dc.date.accessioned2008-04-23T02:41:05Zen_AU
dc.date.accessioned2010-04-30T05:01:42Zen_AU
dc.date.available2008-04-23T02:41:05Zen_AU
dc.date.available2010-04-30T05:01:42Zen_AU
dc.date.issued2006-07en_AU
dc.date.statistics2006-07en_AU
dc.description.abstractThe wide-line H-1 nuclear magnetic resonance (NMR) spectrum of paper in equilibrium with ambient humidity consists of super-imposed relatively broad and narrow lines. The narrower line is of the order of 2 kHz wide at half the maximum height, while the broader line is of the order of 40 kHz in width at half height. On the basis of these line widths, the narrow line is assigned to water sorbed to the paper, and the broad line to the polymeric constituents of the paper. It was not possible to distinguish between the various polymeric components of paper contributing to the H-1 NMR spectra. A modified Goldman-Shen pulse sequence was used to generate a spatial magnetisation gradient between the polymer and water phases. The exchange of magnetisation between protons associated with water and those associated with the macromolecules in paper was observed. The exchange of magnetisation is discussed within a heat transfer model for homonuclear dipolar coupling, with exchange being characterised by a spin-diffusion coefficient. Consideration of the magnitude of the initial rate of the exchange process and estimates of the spin-spin relaxation times based on H-1 line widths indicate that some water must exist in a sufficiently immobile state as to allow homonuclear dipolar interactions between adjacent polymer and water protons. Thus, water sorbed onto paper must exist in at least two states in mass exchange with each other. This observation allows certain conclusions to be drawn about the ratio of free/bound water as a function of moisture content and the dispersal of water within the polymer matrix. © 2006, Walter de Gruyteren_AU
dc.identifier.citationGarvey, C. J., Parker, I. H., Simon, G. P., & Whittaker, A. K. (2006). The hydration of paper studied with solid-state magnetisation-exchange H-1 NMR spectroscopy. Holzforschung, 60(4), 409-416. doi:10.1515/HF.2006.064en_AU
dc.identifier.govdoc1099en_AU
dc.identifier.issn0018-3830en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleHolzforschungen_AU
dc.identifier.pagination409-416en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1109en_AU
dc.identifier.volume60en_AU
dc.language.isoenen_AU
dc.publisherWalter de Gruyteren_AU
dc.subjectHydrationen_AU
dc.subjectSpectroscopyen_AU
dc.subjectNuclear magnetic resonanceen_AU
dc.subjectPaperen_AU
dc.subjectMagnetismen_AU
dc.subjectWateren_AU
dc.titleHydration of paper studied with solid-state magnetisation-exchange H-1 NMR spectroscopyen_AU
dc.typeJournal Articleen_AU
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