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Study of the Synthesis of Cellulose Carbamates
Yi-Ping Huang
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Abstract
Cellulose carbamate was synthesized in xylene as solvent with microcrystalline cellulose and urea as raw materials.All factors affecting the N content in the products were investigated.The optimum technological conditions were determined that the pretreatment of microcrystalline cellulose took place in 20% NaOH solution for 4-6 h and the reaction was carried out at 137 ℃ for 4 h with the mass ratio of urea to microcrystalline cellulose =(3-4)/1.Elementary analysis indicated that the content of nitrogen in the products was about 8%.