Abstract
A new cellulose derivative, sodium deoxycellulosesulfonate was prepared by a nucleophilic substitution of cellulose p-toluenesulfonate (cellulose tosylate) with sodium hydrogensulfite under refluxing in water. Degree of substitution of water-insoluble fraction of the sulfonate increased with reaction time and it was about 0.10 for cellulose tosylate with DS of 0.92 and 0.065 for that with DS of 0.79 at 24h, respectively. Yield of the insoluble sulfonates decreased with reaction time and showed a value as low as 48mol% for cellulose tosylate with DS of 0.92 at 48h. Conversions of the p-toluenesulfonate group to the sulfonate group were 11 and 8.2mol% for cellulose tosylates with DS of 0.92 and 0.79 at 24h, respectively, and p-toluenesulfonate group still remained even after the reaction of 48h. The sodium deoxycellulosesulfonate was identified by dyeing test with Methylene Blue for acid group, micro combustion test for sulfur, incineration test for sulfonate and sulfate groups, and hydrolysis-in-cineration test for sulfonate group, as well as with IR absorption spectra.
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