纤维素大分子引发剂的制备与表征  

Preparation and Characterization of Cellulose Macro-molecule Initiator

作　　者：王音乔 毛芸 乔永振 田静 杨益琴[1] 戴红旗[1] WANG Yin-qiao;MAO Yun;QIAO Yong-zhen;TIAN Jing;YANG Yi-qin;DAI Hong-qi(Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University,Nanjing 210037, China)

机构地区：[1]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037

出　　处：《纤维素科学与技术》2017年第3期26-31,共6页Journal of Cellulose Science and Technology

基　　金：江苏省大学生创新课题资助项目(201510298073Y)

摘　　要：以阔叶浆纤维素为原料,2-溴异丁酰溴(BIBB)作溴化试剂,4-二甲氨基吡啶(DMAP)作催化剂,二氯甲烷(DCM)作为溶剂的反应体系中,制备纤维素大分子引发剂Cellulose-Br。探究反应时间、反应温度、溴化试剂用量、催化剂用量对大分子引发剂取代度(DS)的影响,并通过正交试验,确定了制备大分子引发剂的最佳工艺条件为反应温度为35℃、反应时间为32 h、溴化试剂与纤维素的摩尔比为5.5:1、催化剂与溴化试剂的摩尔比为0.6:1,产品取代度达到了0.94。红外光谱表明大分子引发剂的合成是通过酯化反应完成的。Hardwood pulp was selected as cellulose raw material,2-bromo-isobutyryl bromide(BIBB)as initiator,4-dimethylaminopyridine(DMAP)as catalyst,dichloromethane(DCM)as a solvent,cellulose macro-moleculeinitiator(cellulose-Br)was prepared in the reaction system.The reaction time,reaction temperature,amount ofbromination reagent and amount of catalyst on the degree of substitution(DS)of cellulose-Br was investigated.The optimum conditions for the preparation of macro-molecule initiator were determined by orthogonal test asfollows:The reaction temperature was35℃,the reaction time was32h,the molar ratio of initiator BIBB tocellulose was5.5∶1,the molar ratio of catalyst DMAP to BIBB was0.6∶1.Product substitution reached0.94.The IR spectra showed that the synthesis of macro-molecule initiator was accomplished by esterification.

关 键 词：纤维素 原子转移自由基聚合(ATRP) 2-溴异丁酰溴 大分子引发剂 

分 类 号：TQ352.79[化学工程] O636.11[理学—高分子化学]