Preparation of Carboxymethylcellulose from Waste Paper  

作　　者：HE Jie WANG Dali LONG Lirong HUANG Yali CUI Chunxiang YI Jiajia YANG Shengyang WANG Yuchang 何杰;WANG Dali;LONG Lirong;HUANG Yali;CUI Chunxiang;YI Jiajia;YANG Shengyang;WANG Yuchang(College of Chemistry and Chemical Engineering,Beifang Minzu University,Tinchuan 750021,China;Institute of Physical Education,Lanzhou City University,Lanzhou 730070,China)

机构地区：[1]College of Chemistry and Chemical Engineering,Beifang Minzu University,Tinchuan 750021,China [2]Institute of Physical Education,Lanzhou City University,Lanzhou 730070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2021年第4期562-568,共7页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Ningxia Natural Science Fund(2020A0661);the Lanzhou Science and Technology Bureau Project(2019-RC-104);the School-enterprise Cooperation Project(2019640001000097);the Scientific Research Project of Key Laboratory Project of the National People’s Commission(15-150070(69#));the University’s Scientific Research Project(2016-HG-KY-04);the University Student Innovation Projects(2021-XJ-HG-003,2021-XJ-HG-027)。

摘　　要：We aimed at producing sodium carboxymethylcellulose (CMC) from waste paper cellulose.For this etherification,the raw material was waste paper,the cellulose was initially alkalized with NaOH,the etherifying agent was sodium chloroacetate,and the reaction medium was water or ethanol.The method provided by us,i e,a method for preparing CMC from waste paper,was environment-friendly,could be easily implemented,and could be conveniently applied to make waste paper efficiently used with high profit,and to expand the range of usable raw materials for CMC production.We successfully synthesized CMC and prepared CMC plastic membrane.This practice changes waste into valuables,which is beneficial to our living environment.For preparation of CMC,one of the crucial factors is appropriate pretreatment of the cellulose from waste paper.The pretreatment was done with a self-built hydrolysis method.We experimentally examined the effects of the mass ratios of reactants,reaction temperature,time,and reaction environment of homogeneous or heterogeneous on CMC yield.The innovative points of this research could be stated as follows:the reaction activity of cellulose was improved by pre-hydrolysis;synthesizing CMC with cellulose from waste paper changes waste into valuables is beneficial to our living environment;and a freezing treatment for the cellulose-alkali mixture was innovatively added.The effects were exhibited by a desired final conversion efficiency.

关 键 词：CMC CELLULOSE ETHERIFICATION cellulose ether MEMBRANE 

分 类 号：X705[环境科学与工程—环境工程] TQ352.79[化学工程]