Oxidative degradation and upcycling of polyethylene wastes

IF 10.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Science China Chemistry Pub Date : 2024-08-23 DOI:10.1007/s11426-024-2252-9

Yizhen Che, Yanfen Wu, Zhiqiang Niu

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Abstract

Plastics have become omnipresent in modern life due to their versatility and durability. However, this convenience comes at the cost of substantial waste generation. The inherent chemical stability of plastics complicates its recycling, leading to environmental pollution and ecological threats. This mini-review highlights recent advancements in addressing this challenge by oxidative transformation of polyethylene (PE) into new functional polymers, value-added chemicals, and carbon-based materials. We first discuss the introduction of hydroxyl, carbonyl groups onto PE with a focus on the functionalization degree and selectivity. Subsequently, approaches for PE oxidation into dicarboxylic acids and short-chain oxidized PE are described and compared, with an emphasis on the tandem reactions for converting mixed dicarboxylic acids into other value-added chemicals. We also briefly discuss the oxidative transformation of PE into carbon-based materials and summarize the progress in qualitative and quantitative analysis of oxidation products. Finally, we conclude this mini-review by highlighting the challenges and opportunities in the field.

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聚乙烯废物的氧化降解和升级再循环

塑料因其多功能性和耐用性在现代生活中无处不在。然而，这种便利是以产生大量废物为代价的。塑料固有的化学稳定性使其回收变得更加复杂，从而导致环境污染和生态威胁。本微型综述重点介绍了通过将聚乙烯（PE）氧化转化为新型功能聚合物、高附加值化学品和碳基材料来应对这一挑战的最新进展。我们首先讨论了将羟基和羰基引入聚乙烯的问题，重点是官能化程度和选择性。随后，介绍并比较了将聚乙烯氧化成二羧酸和短链氧化聚乙烯的方法，重点是将混合二羧酸转化为其他增值化学品的串联反应。我们还简要讨论了聚乙烯氧化转化为碳基材料的过程，并总结了氧化产物定性和定量分析方面的进展。最后，我们强调了该领域面临的挑战和机遇，以此作为本微型综述的结尾。

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.