聚对苯二甲酸乙二醇酯
对苯二甲酸
材料科学
解聚
原材料
催化作用
水解
电池(电)
钙
有机化学
化学工程
聚酯纤维
化学
复合材料
高分子化学
物理
工程类
功率(物理)
冶金
量子力学
作者
Rui Xue,Canhao Qiu,Xiaoli Zhou,Yun Cheng,Zhen Zhang,Yi Zhang,Uwe Schröder,Uwe T. Bornscheuer,Weiliang Dong,Ren Wei,Min Jiang
出处
期刊:Angewandte Chemie
[Wiley]
日期:2023-10-26
卷期号:63 (1): e202313633-e202313633
被引量:48
标识
DOI:10.1002/anie.202313633
摘要
Abstract Biotechnological recycling offers a promising solution to address the environmental concerns associated with waste plastics, particularly polyethylene terephthalate (PET), widely utilized in packaging materials and textiles. To advance the development of a bio‐based circular plastic economy, innovative upcycling strategies capable of generating higher‐value products are needed. In this study, we enhanced the enzymatic depolymerization of waste PET by incorporating highly concentrated calcium ions (up to 1 m ) to the hydrolytic reaction catalyzed by the best currently known enzyme LCC ICCG . The presence of calcium ions not only improved the thermal stability and activity of the biocatalyst but also significantly reduced the consumption of base required to maintain optimal pH levels. Employing optimized conditions at 80 °C for 12 h, we successfully converted ≈84 % of the waste PET (200 g L −1 ) into solid hydrated calcium terephthalate (CaTP ⋅ 3H 2 O) as the primary product instead of soluble terephthalate salt. CaTP ⋅ 3H 2 O was easily purified and employed as a raw material for battery electrode production, exhibiting an initial reversible specific capacity of 164.2 mAh g −1 . Through techno‐economic analysis, we conclusively demonstrated that the one‐pot biocatalysis‐based synthesis of CaTP is a superior PET upcycling strategy than the secondary synthesis method employing recycled terephthalic acid.
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