Scholarlink

<p>Here we address a key mechanistic question that limits thermochemical upcycling of waste polyurethane wire: copper is not an inert background but actively redirects pyrolysis products. We propose a copper-assisted dynamic pyrolysis model in which copper reshapes the conversion-dependent energy-barrier profile through electronic-structure regulation, leading to a predictable shift in dominant reaction routes. Thermogravimetric analysis reveals a robust three-stage decomposition and a pronounced evolution of apparent barriers with conversion, consistent with a late-stage regime governed by radical reorganisation, condensation and char formation. Temperature-resolved product fingerprints provide direct chemical evidence for pathway selectivity. Reversible copper coordination and frontier-orbital interactions lower key transition barriers and stabilise intermediates, promoting radical recombination and aromatization. These results establish a cross-scale link between macroscopic pyrolysis behavior, barrier evolution and product selectivity, and offer a general framework for endogenous metal regulation, supporting cleaner processing and improved copper recovery.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Reversible copper coordination redirects pyrolysis products in waste polyurethane enamelled copper wire

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月3日

查看全文
  • Wei Zhang,
  • Xiaoguang Zhang,
  • Yiqi Geng,
  • Linbo Zhang,
  • Ran Tao,
  • Bin Li,
  • Yufeng Wu

摘要

Here we address a key mechanistic question that limits thermochemical upcycling of waste polyurethane wire: copper is not an inert background but actively redirects pyrolysis products. We propose a copper-assisted dynamic pyrolysis model in which copper reshapes the conversion-dependent energy-barrier profile through electronic-structure regulation, leading to a predictable shift in dominant reaction routes. Thermogravimetric analysis reveals a robust three-stage decomposition and a pronounced evolution of apparent barriers with conversion, consistent with a late-stage regime governed by radical reorganisation, condensation and char formation. Temperature-resolved product fingerprints provide direct chemical evidence for pathway selectivity. Reversible copper coordination and frontier-orbital interactions lower key transition barriers and stabilise intermediates, promoting radical recombination and aromatization. These results establish a cross-scale link between macroscopic pyrolysis behavior, barrier evolution and product selectivity, and offer a general framework for endogenous metal regulation, supporting cleaner processing and improved copper recovery.