解聚
瓶子
对苯二甲酸
聚对苯二甲酸乙二醇酯
水解
降级(电信)
材料科学
酶水解
聚合物
基质(水族馆)
微波食品加热
产量(工程)
原材料
水溶液
化学
化学工程
有机化学
聚酯纤维
复合材料
电信
海洋学
物理
工程类
量子力学
计算机科学
地质学
作者
Boyang Guo,Ximena Lopez‐Lorenzo,Yuan Fang,Eva Bäckström,Antonio J. Capezza,Sudarsana Reddy Vanga,István Furó,Minna Hakkarainen,Per‐Olof Syrén
出处
期刊:Chemsuschem
[Wiley]
日期:2023-06-29
卷期号:16 (18)
被引量:11
标识
DOI:10.1002/cssc.202300742
摘要
Recycling plastics is the key to reaching a sustainable materials economy. Biocatalytic degradation of plastics shows great promise by allowing selective depolymerization of man-made materials into constituent building blocks under mild aqueous conditions. However, insoluble plastics have polymer chains that can reside in different conformations and show compact secondary structures that offer low accessibility for initiating the depolymerization reaction by enzymes. In this work, we overcome these shortcomings by microwave irradiation as a pre-treatment process to deliver powders of polyethylene terephthalate (PET) particles suitable for subsequent biotechnology-assisted plastic degradation by previously generated engineered enzymes. An optimized microwave step resulted in 1400 times higher integral of released terephthalic acid (TPA) from high-performance liquid chromatography (HPLC), compared to original untreated PET bottle. Biocatalytic plastic hydrolysis of substrates originating from PET bottles responded to 78 % yield conversion from 2 h microwave pretreatment and 1 h enzymatic reaction at 30 °C. The increase in activity stems from enhanced substrate accessibility from the microwave step, followed by the administration of designer enzymes capable of accommodating oligomers and shorter chains released in a productive conformation.
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