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Depolymerization of polyethylene terephthalate with glycol under comparatively mild conditions

文献类型：期刊论文

作者Huang, Junjie2,3; Yan, Dongxia2; Zhu, Qingqing2,3; Cheng, Xiujie2; Tang, Jing1,2; Lu, Xingmei2,3; Xin, Jiayu2,3
刊名POLYMER DEGRADATION AND STABILITY
出版日期2023-02-01
卷号208页码:9
ISSN号0141-3910
关键词Polyethylene terephthalate Bis(2-hydroxyethyl) terephthalate Glycolysis Low temperature Cosolvent
DOI10.1016/j.polymdegradstab.2022.110245
英文摘要The depolymerization of polyethylene terephthalate (PET) can proceed by using ethylene glycol (EG) as an alcoholysis solvent. However, high reaction temperature (>= 180 degrees C) of glycolysis process requires high energy consumption, and unfortunately results in yellowing of monomer product, i.e., bis(2-hydroxyethyl) terephthalate (BHET), limiting the production of high-quality and colorless recycled PET (rPET). To address this problem, a strategy involving acetonitrile as cosolvent was applied to decrease glycolysis temperature to 90 degrees C or even lower, and solvents as well as catalyst can be recycled and reused. The glycolysis of PET is hard to proceed at 90 degrees C. However, the swelling effect of acetonitrile caused cracks and defects on the surface of PET, which promoted the depolymerization of PET and led to an S-shaped reaction curve. Besides, adding acetonitrile could significantly accelerate the degradation of oligomers into BHET. Under the optimal reaction conditions, the conversion of PET and yield of BHET could reach 96% and 90%, respectively.
WOS关键词SOFT-DRINK BOTTLES ; POLY(ETHYLENE-TEREPHTHALATE) ; KINETICS ; RECYCLE
资助项目National Key R & D Program of China[2019YFC1908204] ; National Key R & D Program of China[2021YFE0190800] ; International Partnership Program of Chinese Academy of Sciences[21776289] ; National Natural Science Foundation of China ; [122111KYSB20190060] ; [22238011] ; [22178358] ; [21878314] ; [21908232]
WOS研究方向Polymer Science
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000920271800001
资助机构National Key R & D Program of China ; International Partnership Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.ipe.ac.cn/handle/122111/56669]  
通讯作者Lu, Xingmei; Xin, Jiayu
作者单位1.Qingdao Univ, Sch Chem & Chem Engn, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Innovat Acad Green Manufacture, Beijing Key Lab Ion Liquids Clean Proc,CAS Key Lab, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Junjie,Yan, Dongxia,Zhu, Qingqing,et al. Depolymerization of polyethylene terephthalate with glycol under comparatively mild conditions[J]. POLYMER DEGRADATION AND STABILITY,2023,208:9.
APA Huang, Junjie.,Yan, Dongxia.,Zhu, Qingqing.,Cheng, Xiujie.,Tang, Jing.,...&Xin, Jiayu.(2023).Depolymerization of polyethylene terephthalate with glycol under comparatively mild conditions.POLYMER DEGRADATION AND STABILITY,208,9.
MLA Huang, Junjie,et al."Depolymerization of polyethylene terephthalate with glycol under comparatively mild conditions".POLYMER DEGRADATION AND STABILITY 208(2023):9.

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来源：过程工程研究所

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