Poderyte Margarita, Lima Rodrigo, Golbækdal Peter Illum, Juhl Dennis Wilkens, Olesen Kathrine L, Nielsen Niels Chr, Lanza Arianna, Lee Ji-Woong
Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
The Novo Nordisk Foundation CO2 Research Center (CORC), Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark.
Sci Adv. 2025 Sep 5;11(36):eadv5906. doi: 10.1126/sciadv.adv5906.
Polyethylene terephthalate (PET) is a ubiquitous polymer with a lack of viable waste management solutions besides mechanical recycling, incineration, and landfilling. Herein, we demonstrate a chemical upcycling of PET waste into materials for CO capture via aminolysis. The aminolysis reaction products-a bis-aminoamide (BAETA) and oligomers-exhibit high CO capture capacity up to 3.4 moles per kilogram as a stand-alone organic solid material. BAETA shows strong chemisorption featuring high selectivity for CO capture from flue gas (5 to 20% CO) and ambient air (~400 parts per million CO) under humid conditions. Our thermally stable material (>250°C) enables CO capture at high temperatures (up to 170°C) for multiple cycles. Scalability of the material production was demonstrated by performing aminolysis of untreated consumer waste PET of 1 kilogram. Our approach introduces a simple and straightforward solution that can address both plastic waste and carbon dioxide, offering a potential pathway toward net negative emissions.
聚对苯二甲酸乙二酯（PET）是一种无处不在的聚合物，除了机械回收、焚烧和填埋之外，缺乏可行的废物管理解决方案。在此，我们展示了一种将PET废料通过氨解化学升级循环转化为用于捕获二氧化碳的材料的方法。氨解反应产物——双氨基酰胺（BAETA）和低聚物——作为一种独立的有机固体材料，表现出高达每千克3.4摩尔的高二氧化碳捕获能力。BAETA显示出强烈的化学吸附作用，在潮湿条件下对来自烟道气（5%至20%的二氧化碳）和环境空气（约百万分之400的二氧化碳）中的二氧化碳捕获具有高选择性。我们的热稳定材料（>250°C）能够在高温（高达170°C）下进行多次循环的二氧化碳捕获。通过对1千克未经处理的消费后废弃PET进行氨解，证明了该材料生产的可扩展性。我们的方法引入了一种简单直接的解决方案，既能解决塑料废料问题，又能处理二氧化碳，为实现净负排放提供了一条潜在途径。
