Butanolysis of poly(lactic acid) catalyzed by ionic liquids

doi:10.11949/j.issn.0438-1157.20141812

CIESC Journal ›› 2015, Vol. 66 ›› Issue (S1): 187-191.DOI: 10.11949/j.issn.0438-1157.20141812

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Butanolysis of poly(lactic acid) catalyzed by ionic liquids

SONG Xiuyan¹, WANG Hui², ZHANG Xiaojing¹, LIU Fusheng¹, LU Jiaxiang¹

1 College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China;
2 College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, Shandong, China

Received:2014-12-08 Revised:2014-12-18 Online:2015-06-30 Published:2015-06-30
Supported by:
supported by the National Natural Science Foundation of China (21176130), the Doctoral Fund of Ministry of Education (20133719110004) and the project of Shandong Province Higher Educational Science and Technology Program (J14LC12).

离子液体催化聚乳酸丁醇醇解反应

宋修艳¹, 王辉², 张晓静¹, 刘福胜¹, 路家祥¹

1 青岛科技大学化工学院, 山东青岛 266042;
2 青岛农业大学化学与药学院, 山东青岛 266109

通讯作者: 刘福胜
基金资助:
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)。

Abstract

Abstract:

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 and n-butanol dosage were examined. It was indicated that the conversion of PLA was≥81% and the yield of n-butyl lactate was≥70% under the following conditions: reaction temperature 150℃, reaction time 3 h, m([Bmim][OAc]):m(PLA)=0.2:1 and n(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 of n-butyl lactate.

Key words: ionic liquid, poly(lactic acid), butanolysis, n-butyl lactate

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。

关键词: 离子液体, 聚乳酸, 丁醇醇解, 乳酸正丁酯

CLC Number:

TQ323.41

SONG Xiuyan, WANG Hui, ZHANG Xiaojing, LIU Fusheng, LU Jiaxiang. Butanolysis of poly(lactic acid) catalyzed by ionic liquids[J]. CIESC Journal, 2015, 66(S1): 187-191.

宋修艳, 王辉, 张晓静, 刘福胜, 路家祥. 离子液体催化聚乳酸丁醇醇解反应[J]. 化工学报, 2015, 66(S1): 187-191.

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Butanolysis of poly(lactic acid) catalyzed by ionic liquids

离子液体催化聚乳酸丁醇醇解反应

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