MEASUREMENT OF THE HEATS OF WETTING OF CELLULOSE AND WOOD PULP

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Abstract
The heats of wetting of dry cellulose and wood pulp have been measured for the first time. The influence of the initial water content of the cellulose on the heat of wetting has been determined. It is shown that when the water is left as a result of partial desorption a higher value is obtained. The heats of wetting of wood meal and different wood pulps have been determined. The heats of adsorption were calculated, and all the data are discussed from the point of view of the physical structure of cellulose. A few preliminary measurements of the heat of adsorption of sodium hydroxide were made. The experimental technique of using a rotating adiabatic calorimeter is shown to be admirably adapted for measurements of this kind.

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