Peculiarities of hydration of cellulose
on air and in water suspensions
as studied by 1H NMR spectroscopy method
O. V. Shulga1, D. Dollimore1, V. V. Turov2, G. P. Kutrov3
1Department of Chemistry, Universitet of Toledo,
Toledo OH 43606, United States
2Institute of Surface Chemistry of the National Academy of Science,
Pr. Nuki 31, 252022 Kyiv, Ukraine,
3Department of Chemistry, Taras Shevchenko University
Vladimirska St. 60, Kyiv, Ukraine
The characteristics of water bounded layers in the hydrated powders and water suspension of microcrystalline cellulose were investigated by H1 NMR method. The characteristics of water bounded layers were calculated and the magnitude of interface energy (gs) at the interface cellulose/water in water environment were determined. It is found that the concentration of strong bounded water and the (gs) value are in a strong dependence to the concentration of cellulose in suspension. Probably, it is dictated by strong interaction between cellulose particles. At the very high concentration of suspension concentration of water inside the cellulose filament (fibre) decreases in more than 3 time and (gs) value decreases from 9 to 31 J/g which is due to effect of surface forces.
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