Abstract
The self-diffusion of water sorbed in cellulose fibers was investigatedby means of NMR during slow drying in order to follow changes in the celluloseporous structure. In pulp fibers pores with at least one dimension on theμm scale were observed at high amounts of sorbed water and nm-scale pores atlow amounts. Beating affected the μm-scale pores. Regenerated cellulosefibers had nm-scale pores up to high amounts of water. Bulk water was observedas a second component with long T 2 in a CPMGexperiment. The sequence of water removal for kraft pulp fibers is: (1) bulkwater, (2) water in μm-scale pores and (3) water in nm-scale pores.
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Topgaard, D., Söderman, O. Changes of cellulose fiber wall structure during drying investigated using NMR self-diffusion and relaxation experiments. Cellulose 9, 139–147 (2002). https://doi.org/10.1023/A:1020158524621
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DOI: https://doi.org/10.1023/A:1020158524621