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重新利用消费后聚乙烯,以获得具有可再加工,可回收和可调节性质的交联聚乙烯

Kun Liu¹, Yucheng Zhao¹, Anna M Wolff¹

¹Department of Chemistry, Colorado State University, Center Ave, Fort Collins, Colorado, 80523, USA.

Angewandte Chemie (International ed. in English)

|February 24, 2025

概括

这项研究将混合后消费聚乙烯 (PE) 升级为可再加工和可回收的交叉链聚乙烯 (XLPE). 新型XLPE提供了增强的性能和循环性,解决了塑料垃圾的挑战.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
可持续工程可持续工程

背景情况:

聚乙烯 (PE) 废弃物由于其持久性和积累而造成重大环境问题.
将PE再循环转化为附加值产品,为塑料废物危机提供了一个可持续的解决方案.

研究的目的:

从混合后消费PE中开发可再加工和化学回收的交联聚乙烯 (XLPE).
调查新型XLPE材料的性能和可回收性.

主要方法:

将PE转化为远性寡合物.
使用带有动态 (TETA) 和非动态 (Tri-HDI) 交叉连接器的混合交叉连接系统进行再聚合.
与巨醇的共聚化产生复合XLPEs.
评估机械性能,热稳定性和抗爬动性.
对循环性的脱聚合和再聚合的评估.

主要成果:

从混合后消费PE中成功合成了可再加工和化学回收的XLPE.
与PE相比,XLPE表现出更好的机械性能,减少爬行和高温稳定性.
通过TETA,可以在最低程度的降解下进行代再处理;通过Tri-HDI,可以确保功能性.
复合XLPEs允许调节材料的特性.
在温和条件下的高效和选择性脱聚合,甚至在混合废物流中,使单体回收成为可能.

结论:

开发的XLPE为塑料废弃物的回收利用提供了一个可行的途径,使其成为高性能,可回收材料.
这种方法通过使聚合物构成块的回收和再利用来促进循环经济.
该材料的性能和可回收性显示出减少塑料污染的巨大潜力.

关键词:

交叉链接聚乙烯的交叉链接聚乙烯.塑料废弃物的重新利用可调节的财产可回收利用的可回收利用可以重新处理的可回收.

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