Two-phase water model in the cellulose network of paper

Water diffusion in cellulose was studied via two-phase Kärger model and the propagator method. In addition to ruling out anomalous diffusion, the mean squared displacements obtained at different diffusion times from the Kärger model allowed to characterize the system’s phases by their average confin...

Full description

Saved in:
Bibliographic Details
Published in:Cellulose (London) 2017-08, Vol.24 (8), p.3479-3487
Main Authors: Conti, A., Palombo, M., Parmentier, A., Poggi, G., Baglioni, P., De Luca, F.
Format: Article
Language:English
Subjects:
Bioorganic Chemistry
Categories
Cellulose
Cellulose fibers
Ceramics
Chemistry
Chemistry and Materials Science
Composites
Confining
Diffusion
Domains
Fluid dynamics
Freezing
Glass
Natural Materials
Organic Chemistry
Original Paper
Physical Chemistry
Physical simulation
Polymer Sciences
Sustainable Development
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Water diffusion in cellulose was studied via two-phase Kärger model and the propagator method. In addition to ruling out anomalous diffusion, the mean squared displacements obtained at different diffusion times from the Kärger 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.
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-017-1338-2