一步法制备纤维素氯乙酸酯及其原子转移自由基接枝共聚  

One Step Preparation of Cellulose Chloroacetate and Synthesis of the Cellulose-Graft-Copolymer

作　　者：张佳珺[1] 詹怀宇[1] 林春香[1] 刘明华[1,2] 付时雨[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]福州大学环境与资源学院,福建福州350108

出　　处：《造纸科学与技术》2009年第3期7-10,共4页Paper Science & Technology

基　　金：教育部"长江学者和创新团队发展计划"项目(IRT0552);中国博士后基金(20070410238)资助项目

摘　　要：以离子液体为反应介质,氯乙酰氯为酰化试剂,在不加任何催化剂的条件下,一步法制备出纤维素氯乙酰酸酯。研究了反应条件(酰化试剂用量、反应时间、反应温度)对纤维素取代度(DS)的影响,并对产物结构进行表征(FT-IR、NMR)。随后以纤维素氯乙酰酸酯为大分子引发剂,引发了甲基丙烯酸甲酯(MMA)在离子液体中的原子转移自由基聚合(ATRP)。研究结果表明,MMA在离子液体中的聚合是活性/可控的。Cellulose chloroacetate （Cell-ClAc）, as a macroinitiator, was first synthesized by direct acylation of cellulose with chloroacetyl chloride without any catalyst under mild conditions in an ionic liquid, 1 - allyl - 3 - methylimidazolium chloride （BMIMCl）. Samples were analyzed by NMR and FT - IR. The effects on the DS of the cellulose of acylation reagent, reaction temperature and reaction time were studied. Then, the cellulose-based macroinitiator was used for the ATRP of MMA. The copolymerization was carried out in BMIMCI without homopolymer byproduct. And the result showed that the polymerization is controlled/living.

关 键 词：纤维素 大分子引发剂 一步法 接枝共聚 ATRP 

分 类 号：TQ317[化学工程—高聚物工业]