1H NMR Relaxation study of cellulose - water interactions in paper (Articolo in rivista)

Type
Label
  • 1H NMR Relaxation study of cellulose - water interactions in paper (Articolo in rivista) (literal)
Anno
  • 1999-01-01T00:00:00+01:00 (literal)
Alternative label
  • D. Capitani, M.C. Emanuele, J. Bella, A.L. Segre, D. Attanasio, B. Focher, G., Capretti (1999)
    1H NMR Relaxation study of cellulose - water interactions in paper
    in Tappi journal
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D. Capitani, M.C. Emanuele, J. Bella, A.L. Segre, D. Attanasio, B. Focher, G., Capretti (literal)
Pagina inizio
  • 117 (literal)
Pagina fine
  • 124 (literal)
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  • 82 (literal)
Rivista
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  • 15 (literal)
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  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
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  • Istituto di Metodologie Chimiche Istituto di Struttura della Materia Stazione Sperimentale Cellulosa e Carta, Milano (literal)
Titolo
  • 1H NMR Relaxation study of cellulose - water interactions in paper (literal)
Abstract
  • The authors studied interaction between water and cellulose in laboratory paper prepared ad hoc in alkaline condition using H-1 NMR relaxation techniques. Since paramagnetic substances play a major role in NMR relaxation processes, EPR spectra were also studied. 1H NMR can give information on the interaction between cellulose and water coupled by a strong spin diffusion that can equalize Ti values. Measurements of the cellulose/total water molar ratio and the cellulose/bound water molar ratio result from the free induction decay. Free water content in groundwood paper is more than double for linter and kraft paper sheets. Performing a line shape analysis of the 1H resonance as a function of temperature provides information about the porosity of the system obtaining a scale of the distribution of pore diameter sizes. T-2 values of the water component depend on the amount and type of paramagnetic impurities that short T-2 values and the amount of free water. This parameter is therefore only useful for comparing paper from the same origin. (literal)
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