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Study of Cellulose Interaction with Various Liquids

Michael Ioelovich

Interaction of dry cellulose samples with hydrocarbons, alcohols, ketones, organic acids, water, amines and some other organic liquids has been studied at 298 K using the methods of calorimetry and sorption. Heat of interaction and maximum equilibrium sorption value were determined. The study showed that interaction of various cellulose samples with non-polar (hydrocarbons) and low-polar liquids (higher alcohols, ketones, organic acids, etc.) was accompanied by a small exothermic heat effect, which was below 20 J/g. Unlike non- and low-polar liquids, interaction of cellulose with highly polar liquids (water dimethylformamide, dimethyl sulfoxide, etc.) caused a high exothermic heat effect exceeding 30 J/g DM. It has been found that maximum equilibrium sorption value (So) is a linear function of heat of interaction (ΔH); thus, the specific heat of interaction, ho=ΔH/So, was almost constant regardless of nature of the liquid and structural features of cellulose. Using the constant ho value, the sorption of diverse liquids by cellulose can be predicted.