摘要
以离子液体[Bmim][OAc]为反应介质和催化剂,对聚乳酸(PLA)丁醇醇解反应进行了研究。考察了反应温度、反应时间、离子液体用量、丁醇(n-butanol)用量对反应结果的影响。得到较佳工艺条件为:反应温度为150℃、反应时间为3 h、m([Bmim][OAc]):m(PLA)=0.2:1、n(n-butanol):n(PLA)=5:1。在上述条件下,PLA醇解反应转化率≥81%,乳酸正丁酯收率≥70%。采用FT-IR技术对产品的结构进行了表征。离子液体的回用性能结果表明:[Bmim][OAc]重复利用6次后,PLA转化率和乳酸正丁酯收率无明显变化。
The butanolysis of poly(lactic acid) (PLA) was studied using ionic liquid [Bmim][OAc] as solvent and catalyst. The effects of reaction temperature, reaction time, ionic liquid dosage andn-butanol dosage were examined. It was indicated that the conversion of PLA was≥81% and the yield ofn-butyl lactate was≥70% under the following conditions: reaction temperature 150℃, reaction time 3 h,m([Bmim][OAc]):m(PLA)=0.2:1 andn(n-butanol):n(PLA)=5:1. Reusability of ionic liquid showed that [Bmim][OAc] could be reused up to 6 times without change in the conversion of PLA and yield ofn-butyl lactate.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2015年第S1期187-191,共5页
CIESC Journal
基金
国家自然科学基金项目(21176130)
教育部博士点基金项目(201337190004)
山东省高等学校科技计划项目(J14LC12)~~
关键词
离子液体
聚乳酸
丁醇醇解
乳酸正丁酯
ionic liquid
poly(lactic acid)
butanolysis
n-butyl lactate
