http://www.cnr.it/ontology/cnr/individuo/prodotto/ID231721
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
- Pagina fine
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- Rivista
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- Note
- ISI Web of Science (WOS) (literal)
- Scopu (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 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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