Oxidation of Partially Etherified Cottons with Nitrogen Dioxide

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Abstract
Alkali-soluble, fibrous cellulosic textile materials may be prepared by the oxidation of partially etherified cottons with nitrogen dioxide. Modified cottons bearing ether substituents, such as aminoethyl, carboxymethyl, carboxyethyl, methyl, α-methylcarboxy methyl, or phosphonomethyl groups, were readily oxidized to yield products with high alkali solubility. Using milder oxidation conditions than are required with native or mercerized cottons, products were prepared that are almost completely soluble in dilute sodium hydroxide or sodium carbonate solutions. The oxidation may be carried out with gaseous nitrogen dioxide or with organic solvent solutions of nitrogen dioxide. Variables of the process and properties of the products were investigated most ex tensively with partially carboxymethylated cotton.

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