Peculiarities in the hydration of cellulose in air and water suspensions as studied by 1H NMR spectroscopy

被引：1
|
作者：
Shulga, OV
Dollimore, D
Turov, VV
机构：
[1] Natl Acad Sci Ukraine, Inst Surface Chem, UA-03164 Kiev, Ukraine
[2] Univ Toledo, Dept Chem, Toledo, OH 43606 USA
来源：
ADSORPTION SCIENCE & TECHNOLOGY | 2000年 / 18卷 / 10期
关键词：
D O I：
10.1260/0263617001493882
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Bound water layers in hydrated powders and aqueous suspensions of microcrystalline cellulose were investigated by H-1 NMR methods. The characteristics of such layers were calculated and the magnitude of the interfacial energy (gamma (s)) at the cellulose/water interface in an aqueous environment determined. It was found that the concentration of strongly bound water and the value of gamma (s), were strongly dependent on the concentration of cellulose in suspension. This is probably due to the strong interaction between cellulose particles. At very high suspension concentrations, the concentration of water inside the cellulose filament decreased by more than three-times while the value of gamma (s) decreased from 31 J/g to 9 J/g as a result of surface forces.
引用
收藏
页码：857 / 863
页数：7
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