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《Modern Chemical Industry》 2003-08
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Preparation of carbamoylethyl starch using a semi-dry process

JU Ben-zhi 1,2, ZHANG Shu-fen 1, YANG Jin-zong 1, WANG Wen-xia 3 (1.State Key Laboratory of Fine Chemical, Dalian University of Technology, Dalian 116012, China; 2.Xiamen Yongquan Group Co., Ltd, Xiamen 361023, China; 3.Dalian Institute of Chemistry and Physics, Chinese Academy of Sciences, Dalian 116023, China)  
In the presence of sodium hydroxide and in water reaction medium,carbamoylethylstarch was prepared by using a semi-dry process.The effects of sodium hydroxide,reaction temperature,reaction time,acrylamide concentration on the reaction efficiency and degree of substitution were studied.When the amount of starch,acrylamide and water are 5.7 g,2.2 g and 2 mL respectively,the optimum reaction conditions are as follows:the sodium hydroxide/anhydroglucose unit molar ratio is 0.32,reaction temperature,60℃,and reaction time,2 h.Under these conditions the degree of substitution is 0.64,the reaction efficiency is 64%.The degree of substitution increases with increasing acrylamide/starch unit molar ratios,the reaction efficiency decreases with increasing acrylamide/starch unit molar ratios.
【Fund】: 国家自然科学基金资助项目 (2 97760 0 9)
【CateGory Index】: TS236.9
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