Co-upcycling of polyvinyl chloride/cotton mixed waste into 5-isopropoxymethylfurfural

IF 9.2 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Green Chemistry Pub Date : 2025-08-30 DOI:10.1039/D5GC03404C

Dawang Chu, Jiali Weng, Xu Liu, Hongkun Wang, Yanran Cui, Lei Nie and Zhenglong Li

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Abstract

The co-recycling of waste plastics, biomass waste and waste textiles represents a sustainable strategy for the efficient utilization of waste resources. This study develops a co-conversion process for polyvinyl chloride (PVC) and cotton fibers. Utilizing in situ HCl generated from PVC pyrolysis as a catalyst, cotton fibers were efficiently converted into 5-isopropoxymethylfurfural (IPMF) and other 5-hydroxymethylfurfural (HMF) derivatives (with a total yield of 46.1%). This study demonstrates that the HCl released from PVC catalyzes both the hydrolysis of cellulose into glucose and the subsequent dehydration of fructose to HMF. The Lewis acid sites on the surface of the dechlorinated PVC residue (DHPVC) promote the isomerization reaction between glucose and fructose. Additionally, the solvent isopropanol also serves as a reactant converting HMF into IPMF, which is thermally more stable. As a vital precursor for FDCA, IPMF is a higher value bio-based chemical. This work provides a novel approach for the synergistic recycling of waste polymers and develops a new pathway for the green synthesis of HMF and its derivatives.

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聚氯乙烯/棉混合废弃物共升级回收5-异丙氧基甲基糠醛

废塑料、生物质废物和废纺织品的共同回收是有效利用废物资源的可持续战略。本研究开发了聚氯乙烯（PVC）和棉纤维的共转化工艺。利用聚氯乙烯热解生成的原位HCl作为催化剂，棉纤维高效地转化为5-异丙氧基甲基糠醛（IPMF）和其他5-羟甲基糠醛（HMF）衍生物，总收率为46.1%。本研究表明，从PVC中释放的HCl既催化纤维素水解成葡萄糖，又催化果糖脱水成HMF。脱氯聚氯乙烯残渣（DHPVC）表面的路易斯酸位点促进了葡萄糖和果糖的异构化反应。此外，溶剂异丙醇还可以作为将HMF转化为IPMF的反应物，使其热稳定性更高。IPMF是一种高价值的生物基化学品，是FDCA的重要前体。本研究为废旧聚合物的协同回收提供了新的途径，为HMF及其衍生物的绿色合成开辟了新的途径。

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来源期刊

Green Chemistry 化学-化学综合

CiteScore

16.10

自引率

7.10%

发文量

677

审稿时长

1.4 months

期刊介绍： Green Chemistry is a journal that provides a unique forum for the publication of innovative research on the development of alternative green and sustainable technologies. The scope of Green Chemistry is based on the definition proposed by Anastas and Warner (Green Chemistry: Theory and Practice, P T Anastas and J C Warner, Oxford University Press, Oxford, 1998), which defines green chemistry as the utilisation of a set of principles that reduces or eliminates the use or generation of hazardous substances in the design, manufacture and application of chemical products. Green Chemistry aims to reduce the environmental impact of the chemical enterprise by developing a technology base that is inherently non-toxic to living things and the environment. The journal welcomes submissions on all aspects of research relating to this endeavor and publishes original and significant cutting-edge research that is likely to be of wide general appeal. For a work to be published, it must present a significant advance in green chemistry, including a comparison with existing methods and a demonstration of advantages over those methods.