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Depolymerization of polyesters catalyzed by binuclear metal complexes
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Researchers reviewed binuclear metal complex catalysts for polyester depolymerization, covering reaction mechanisms and applications including polyester-cotton chemical recycling, selective material recovery, bioplastic composting degradation, and environmental breakdown of microplastics.
废弃聚酯的化学回收是缓解塑料污染、实现废弃物资源化利用的有效途径. 然而, 聚酯解聚过程动力学缓慢, 现有催化体系的催化效率有待提升. 本文总结了课题组近年来利用双核金属配合物催化剂通过分子内亲核取代实现聚酯高效解聚的相关进展. 首先讨论双核金属配合物的催化作用机制与结构设计优化; 然后介绍其在涤棉混纺化学回收、混合聚酯全组分选择性回收、生物基塑料堆肥降解以及水体微塑料环境降解中的应用; 最后讨论双核催化剂在聚酯塑料化学回收中面临的主要挑战, 并对未来的研究方向与应用前景进行了展望.
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Catalytic depolymerization of polyester plastics toward closed-loop recycling and upcycling
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Researchers review catalytic depolymerization strategies for polyester plastics, examining how chemical catalysts can break down these materials into their monomer components to enable closed-loop recycling and the conversion of waste into higher-value products.
Chemical recycling of post-consumer polyester wastes using a tertiary amine organocatalyst
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Researchers developed a metal-free chemical recycling method using a common amine catalyst to break down PET and other polyesters from post-consumer plastic waste — including textiles and multilayer packaging — into reusable monomers with 100% yield. This technique offers a simpler, more efficient path to closing the plastic recycling loop.
Valorisation of plastic waste via metal-catalysed depolymerisation
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This review covers metal-catalysed depolymerisation approaches for recycling and upcycling waste plastics back into monomers or value-added chemicals, highlighting recent advances in catalyst design that improve selectivity and yield for common polymer types.
High-selective platinum and palladium capture using polyamide 6: A potent material for platinum group metals’ recovery from spent car catalytic converter
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Researchers demonstrated that polyamide 6 — a common microplastic pollutant — can selectively recover platinum and palladium from solution at rates of roughly 90% and 70% respectively without chemical modification, suggesting a dual-purpose approach that recycles a plastic waste material while recovering scarce precious metals from spent catalytic converters.
Efficient catalytic upcycling of polyester and polycarbonate plastics using NNN-based iron catalyst
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Researchers developed an efficient catalytic system using an NNN-based iron pincer catalyst to depolymerize polyester and polycarbonate plastics via hydrogenative methods, enabling either methanolysis into ester monomers or transfer hydrogenation into value-added products. The system provides an eco-friendly alternative for chemical upcycling of plastic waste, addressing the significant environmental burden of polyester accumulation.
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