Study of Cellulose Interaction with Various LiquidsAuthor(s): 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.