通过上循环使用终端PET来访问一个碳素无化物分子交换机介导的可回收PECT
Hongjie Zhang1,2, Mingyuan Fang1, Shihao Niu1
1State Key Laboratory of Bio-based Fiber Materials, Zhejiang Sci-Tech University, Hangzhou, 310018, China.
Angewandte Chemie (International ed. in English)
|February 6, 2025
概括
这项研究引入了一种使用分子开关的聚乙烯二甲 (PET) 的新型聚合物回收方法. 这种方法可以使PET在闭环循环中回收成有价值的衍生品,而无需使用恶劣的化学品或复杂的工艺.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
背景情况:
- 聚乙烯二甲 (PET) 是一种广泛使用的塑料,由于其一次性应用,造成了严重的环境污染问题.
- 传统的PET化学回收方法通常是低效的,需要复杂的工艺,不可回收的溶剂,并产生低的聚合物转化.
研究的目的:
- 开发一种新,高效,环保的聚合物对聚合物回收废弃物聚乙烯二甲 (PET) 的回收策略.
- 将废弃PET再循环化为含有分子开关的高价值,可回收的聚乙烯-co-1,4-环二甲二甲酸盐衍生物.
主要方法:
- 灵感来自蛋白质分子开关的新型回收策略被开发出来,利用多重凝结原理.
- 废弃PET通过化聚凝被再循环转化为含有分子开关的聚乙烯-co-1,4-cyclohexanedimethanol terephthalate衍生物.
- 分子开关通过酸化 (失活) 和环闭反应 (激活) 控制了聚合物的分子量.
主要成果:
- 通过将分子开关纳入化聚合物产品中,实现了对凝结聚合物的闭环回收能力.
- 通过分别关闭和激活分子开关,证明了可控制的聚合物分子重量的减少和增加.
- 消除了对过度有机溶剂和复杂的脱聚合过程的需求.
结论:
- 呈现了一个新的途径,用于将最终使用的PET升级为有价值的可回收材料.
- 介绍了分子切换的创新概念,以实现冷凝聚合物的闭环可回收性.
- 强调在可持续的聚合物回收利用中大规模实施的巨大潜力.
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