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1. (WO2018184146) PREPARATION METHOD FOR CYANOETHYL CELLULOSE

Pub. No.:    WO/2018/184146    International Application No.:    PCT/CN2017/079429
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Thu Apr 06 01:59:59 CEST 2017
IPC: C08B 11/155
Applicants: SHENZHEN PEICHENG TECHNOLOGY CO., LTD
深圳市佩成科技有限责任公司
Inventors: ZHONG, Linglong
钟玲珑
Title: PREPARATION METHOD FOR CYANOETHYL CELLULOSE
Abstract:
The present invention provides a preparation method for cyanoethyl cellulose (CEC). The method comprises: step 1, alkalization of cellulose, comprising weighing of cellulose, adding a mixture of isopropanol and ethanol, then adding sodium hydroxide solutions of different concentrations, and stirring the mixture; step 2, cyanoethylation of the cellulose, comprising subjecting the mixture of step 1 to suction filtration and squeezing, adding a mixture of acrylonitrile and dichloromethane, stirring the mixture, then raising the temperature in stages for reaction, and terminating the reaction with a corresponding amount of acetic acid after the completion of etherification; and step 3, precipitating the mixture obtained in step 2, and washing the mixture with ethanol or deionized water and drying the mixture. Compared with the prior art, the preparation method for cyanoethyl cellulose provided by the present invention has a simple preparation process and an easily controllable reaction time, and the CEC prepared thereby has a high tensile strength, low elongation at break, no yield point, and excellent rigidity.