The influence of the dispersed oxides on the interface energy of the microcrystaliine cellulose in water suspension

O. V. Shulga; J. Kerchhoff; V. V. Turov

O. V. Shulga The University of Toledo
J. Kerchhoff The University of Toledo
V. V. Turov Інститут хімії поверхні НАН України

Анотація

The characteristics of water bounded layers in the hydrated powders and water suspensions of microcrystalline cellulose and thought containing SiO₂ or TiO₂ particles were investigated by ¹H NMR method. It is found that the concentration of strong bounded water and the γ_s 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 decreases in more than 3 time and (γ_s) value decreases from 9 to 31 J/g which is due to effect of surface forces. In the presence of dispersed particles of oxides, the concentration of bound water and γ_s value in average are decrease, aseptically in the case of suspensions with TiO₂ particles.

Посилання

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