Closed-loop recycling of biodegradable poly(butylene adipate-co-terephthalate) based on hydrolysis and repolymerization strategy

被引:0
作者
Zheng, Wei-Zhen [1 ,2 ]
Li, Xiao [1 ,2 ]
Xie, Jing [1 ,3 ]
Zhang, Ze-Yang [1 ,2 ]
Wang, Ping-Li [1 ,4 ]
Huang, Dan [1 ,4 ]
Ren, Zhong-Lai [1 ,4 ]
Ji, Jun-Hui [1 ,4 ]
Wang, Ge-Xia [1 ,4 ]
机构
[1] Chinese Acad Sci, Natl Engn Res Ctr Engn Plast & Ecol Plast, Tech Inst Phys & Chem, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Municipal Commiss Sci & Technol, Beijing 101117, Peoples R China
[4] Hainan Degradable Plast Technol Innovat Ctr, Haikou 571137, Peoples R China
来源
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 06期
基金
北京市自然科学基金;
关键词
Poly (butylene adipate; co -terephthalate); Adipic acid; Hydrolysis; Repolymerization; Blends; Recycling; END SCISSION; WASTE; CHALLENGES;
D O I
10.1016/j.jece.2024.114354
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Poly(butylene adipate-co-terephthalate) (PBAT) is one of the most widely used biodegradable plastics. Recycling post-consumer PBAT products not only conserves primary energy but also mitigates environmental risks, particularly to marine ecosystems. This work presents a novel hydrolysis-repolymerization strategy for the chemical recycling of PBAT. In this strategy, PBAT hydrolysis occurred under hydrothermal conditions at 170 degrees C, using water as the only solvent and adipic acid, the monomer of PBAT, as an organic acid catalyst. As the hydrolysis yield of PBAT increased, the polymer was converted to oligomers or monomers, which could be directly used for repolymerization without separation steps. By introducing additional raw materials and a polymerization catalyst into the system, resynthesized PBAT could be obtained with mechanical and thermal properties approximating commercial PBAT. In addition, this strategy enabled selective hydrolysis of PBAT/polylactic acid (PLA) blends to recycle the two polyesters separately. It was also possible to prepare poly(butylene adipate-coterephthalate-co-lactide) (PBATL) copolyesters with potential seawater degradation performance by one-step hydrolysis and polymerization of PBAT/PLA blends. This work introduces a novel approach to recycling biodegradable polyesters, offering innovative insights into sustainable waste management.
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页数:10
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