Hydrolysis of poly(lactic acid) into calcium lactate using ionic liquid [Bmim][OAc] for chemical recycling

被引：49
作者：
Song, Xiuyan [1 ]
Wang, Hui [2 ]
Yang, Xuequn [1 ]
Liu, Fusheng [1 ]
Yu, Shitao [1 ]
Liu, Shiwei [1 ]
机构：
[1] Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China
[2] Qingdao Agr Univ, Coll Chem & Pharmaceut Sci, Qingdao 266109, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2014年 / 110卷
基金：
中国国家自然科学基金;
关键词：
Hydrolysis; Poly(lactic acid); Ionic liquid; Chemical recycling; POLY(L-LACTIC ACID); POLYLACTIC ACID; LACTIC-ACID; DEGRADATION; KINETICS; PLA; BIODEGRADATION; COMPOSITE; PLASTICS; BIOMASS;
D O I：
10.1016/j.polymdegradstab.2014.08.020
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Hydrolysis of poly(lactic acid) (PLA) to calcium lactate was studied using an ionic liquid catalyst, 1-butyl-3-methylimidazolium acetate [Bmim][OAc] to develop a chemical recycling process for waste PLA. The influences of experimental parameters, such as reaction time, reaction temperature, [Bmim][OAc] dosage and water dosage on the hydrolysis results of PLA were examined. A study on reusability of the ionic liquid showed that it could be reused up to 7 times with no noticeable decrease in the hydrolysis conversion of PLA and the yield of calcium lactate. A mechanism of PLA hydrolysis in [Bmim][OAc] was proposed. In addition, the kinetics of this reaction was investigated. The results demonstrated that the hydrolysis process was a first-order kinetic reaction in the presence of [Bmim][OAc] and the activation energy is 133.9 kJ/mol. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：65 / 70
页数：6
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