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Degradation of poly(ethylene terephthalate) catalyzed by metal-free choline-based ionic liquids

文献类型：期刊论文

作者Liu, Yachan2,3; Yao, Xiaoqian1,3; Yao, Haoyu1,3; Zhou, Qing1,3; Xin, Jiayu1,2,3; Lu, Xingmei1,2,3; Zhang, Suojiang2,3
刊名GREEN CHEMISTRY
出版日期2020-05-21
卷号22期号:10页码:3122-3131
ISSN号1463-9262
DOI10.1039/d0gc00327a
英文摘要Glycolysis of poly(ethylene terephthalate) (PET) is a prospective way for degradation of PET to its monomer bis(hydroxyethyl) terephthalate (BHET) which can be polymerized again to form new qualified PET materials, and hence provides possibilities for a permanent loop recycling. However, most of the reported glycolysis catalysts are metal-based, leading to high cost and negative environmental impact. In this study, we developed a series of choline-based ionic liquids (ILs) without metals and applied them in the glycolysis of PET as catalysts. Choline acetate ([Ch][OAc]), which is cheaper, more biologically compatible and environmentally friendly in comparison with conventional imidazolium metal-based ILs, can achieve a comparable or even better performance than them. Under optimum conditions (PET (5.0 g), ethylene glycol (EG) (20.0 g), [Ch][OAc] (5 wt%), 180 degrees C, 4 h, atmospheric pressure), the yield of BHET reached up to 85.2%. Additionally, the reaction kinetics was studied and proved to be the shrinking-core model. The apparent activation energy is 131.31 kJ mol(-1), and the pre-exponential factor is 1.21 x 10(13) min(-1). Finally, based on the experimental results and density functional theory (DFT) calculations, a possible mechanism was proposed. The promotion of the glycolysis reaction is attributed to the activation of EG by the formation of hydrogen bonds between EG and the IL.
WOS关键词POLYETHYLENE TEREPHTHALATE ; GLYCOLYSIS ; DEPOLYMERIZATION ; PET ; KINETICS ; WASTE ; HYDROLYSIS ; SOLVENT ; ACID
资助项目National Natural Scientific Fund of China[21878292] ; National Natural Scientific Fund of China[21776289] ; National Natural Scientific Fund of China[21921005] ; K. C. Wong Education Foundation[GJTD-2018-04] ; Chinese Academy of Sciences President's International Fellowship Initiative[122111WGZJTPYJY20180050] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019-A06] ; National Key Research and Development Program of China[2019YFC1908204] ; China Postdoctoral Science Foundation[2019M660797]
WOS研究方向Chemistry ; Science & Technology - Other Topics
语种英语
WOS记录号WOS:000537870500010
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Scientific Fund of China ; K. C. Wong Education Foundation ; Chinese Academy of Sciences President's International Fellowship Initiative ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; National Key Research and Development Program of China ; China Postdoctoral Science Foundation
源URL[http://ir.ipe.ac.cn/handle/122111/40962]  
专题中国科学院过程工程研究所
通讯作者Lu, Xingmei; Zhang, Suojiang
作者单位1.Univ Chinese Acad Sci, Coll Chem & Chem Engn, Beijing 100049, Peoples R China
2.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, Inst Proc Engn,CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Yachan,Yao, Xiaoqian,Yao, Haoyu,et al. Degradation of poly(ethylene terephthalate) catalyzed by metal-free choline-based ionic liquids[J]. GREEN CHEMISTRY,2020,22(10):3122-3131.
APA Liu, Yachan.,Yao, Xiaoqian.,Yao, Haoyu.,Zhou, Qing.,Xin, Jiayu.,...&Zhang, Suojiang.(2020).Degradation of poly(ethylene terephthalate) catalyzed by metal-free choline-based ionic liquids.GREEN CHEMISTRY,22(10),3122-3131.
MLA Liu, Yachan,et al."Degradation of poly(ethylene terephthalate) catalyzed by metal-free choline-based ionic liquids".GREEN CHEMISTRY 22.10(2020):3122-3131.

入库方式： OAI收割

来源：过程工程研究所

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