摘要
以离子液体1-丁基-3-甲基咪唑氯盐([BMIM]Cl)为反应介质,壳聚糖(CS)与L-丙交酯(L-LA)发生均相接枝共聚反应,得到了壳聚糖与L-丙交酯的接枝共聚物。考察了单体和催化剂的用量、反应的温度和时间对接枝率的影响规律。并利用红外光谱、核磁共振氢谱、热重分析等对接枝共聚物进行了表征,证实了L-丙交酯在壳聚糖分子链上发生了接枝共聚。实验结果表明,在[BMIM]Cl中进行的L-丙交酯与壳聚糖的均相接枝共聚反应效率高于非均相反应。
The homogeneous graft copolymerization of L-lactide（L-LA）onto chitosan（CS）using ionic liquid 1-butyl-3-methylimidazolium chloride（[BMIM]Cl）as reaction medium was studied.The effects of various reaction parameters on grafting percentage,such as monomer content,catalyst concentration,reaction time and reaction temperature were investigated.The obtained chitosan grafted poly（L-lactide）（CL）was characterized with FTIR,1H NMR and TG.The results showed that the reaction efficiency of homogeneous graft copolymerization of L-LA and CS in ionic liquid was higher than that of non-homogeneous graft copolymerization.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2010年第11期3020-3024,共5页
CIESC Journal
关键词
壳聚糖
均相
离子液体
接枝共聚
L-丙交酯
chitosan
homogeneous
ionic liquid
graft copolymerization
L-lactide
