Water diffusion in cellulose was studied via two-phase Karger model and the propagator method. In addition to ruling out anomalous diffusion, the mean squared displacements obtained at different diffusion times from the Karger model allowed to characterize the system's phases by their average confining sizes, average connectivity and average apparent diffusion coefficients. The two-phase scheme was confirmed by the propagator method, which has given insights into the confining phase-geometry, found consistent with a parallel-plane arrangement. Final results indicate that water in cellulose is confined in two different types of amorphous domains, one placed at fiber surfaces, the other at fiber cores. This picture fully corresponds to the phenomenological categories so far used to identify water in cellulose fibers, namely, free and bound water, or freezing and non-freezing water.

Conti, A., Palombo, M., Parmentier, A., Poggi, G., Baglioni, P., De Luca, F. (2017). Two-phase water model in the cellulose network of paper. CELLULOSE, 24(8), 3479-3487 [10.1007/s10570-017-1338-2].

Two-phase water model in the cellulose network of paper

Conti A.;Parmentier A.;
2017-05-01

Abstract

Water diffusion in cellulose was studied via two-phase Karger model and the propagator method. In addition to ruling out anomalous diffusion, the mean squared displacements obtained at different diffusion times from the Karger model allowed to characterize the system's phases by their average confining sizes, average connectivity and average apparent diffusion coefficients. The two-phase scheme was confirmed by the propagator method, which has given insights into the confining phase-geometry, found consistent with a parallel-plane arrangement. Final results indicate that water in cellulose is confined in two different types of amorphous domains, one placed at fiber surfaces, the other at fiber cores. This picture fully corresponds to the phenomenological categories so far used to identify water in cellulose fibers, namely, free and bound water, or freezing and non-freezing water.
mag-2017
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/07 - FISICA APPLICATA (A BENI CULTURALI, AMBIENTALI, BIOLOGIA E MEDICINA)
English
Cellulose
Paper
Water diffusion
PFG NMR
Propagator
Conti, A., Palombo, M., Parmentier, A., Poggi, G., Baglioni, P., De Luca, F. (2017). Two-phase water model in the cellulose network of paper. CELLULOSE, 24(8), 3479-3487 [10.1007/s10570-017-1338-2].
Conti, A; Palombo, M; Parmentier, A; Poggi, G; Baglioni, P; De Luca, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/292522
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