William O Kenyon

The Formation and Properties of Oxidized Celluloses

(a,) Much of the published data relates to heterogeneous products and hence is of little utility in determining chemical structure. (b) Two types of &dquo;oxidized cellulose&dquo; of reasonable chemical and physical homogeneity have been prepared by oxidation of the 2,3-hydroxyls and the primary (6) hydroxyl groups of the anhydro-glucose units of cellulose. (c) These are not truly &dquo;oxidized celluloses&dquo; but

The Oxidation of Cellulose by Nitrogen Dioxide

Cellulose has been oxidized by means of nitrogen dioxide to produce a series of oxidized celluloses of various carboxyl group contents. Even at high degrees of oxidation the products retain a fibrous structure. Procedures for analyzing these materials by the calcium acetate and the CO2 evolution method and the results obtained are given. Above a carboxyl group content of about 13%, these oxidized celluloses dissolve quickly and completely in 2% aqueous alkali at room temperature. The properties of this type of oxidized cellulose and of its salts are described and discussed.