从设计以持久的塑料中开发单体回收技术的发展视角
Steffan K Kristensen1, Alexander Ahrens1, Bjarke S Donslund2
1Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark.
ACS organic & inorganic Au
|August 12, 2024
概括
回收聚氨和环氧等耐热聚合物的回收是具有挑战性的,因为它们的交联性质. 最近的进展侧重于去聚合来回收有价值的单体,从而实现可持续的闭环回收解决方案.
科学领域:
- 聚合物科学 聚合物科学
- 材料化学 材料化学
- 可持续工程 可持续工程
背景情况:
- 耐热聚合物,包括聚氨 (PU) 和环氧树脂,由于它们的交联结构,与热塑性材料不同,造成了回收挑战.
- 目前的废弃物处理方法,如填埋和焚烧,是不可持续的,因为大量的使用终端热固材料.
- 结构多样性和复合材料中的使用进一步复杂化了这些广泛生产的聚合物的回收工作.
研究的目的:
- 审查热聚合物回收的脱聚合策略.
- 要突出最近在从聚氨和环氧基材料中回收聚合物构建块的进展.
- 讨论工业规模单体回收用于闭环回收的潜力.
主要方法:
- 讨论各种脱聚合技术,包括聚氨的溶解,酸解,氨解和糖解.
- 对以环氧基材料的催化C-O键裂变和基质促进裂变的探索.
- 专注于从环氧树脂中回收特定的单体,如PU中的多和环氧树脂中的双A (BPA).
主要成果:
- 通过学术界和工业界的合作,在PU回收方面取得了重大进展,几种聚回收工艺接近可扩展性.
- 从环氧复合材料中通过催化C-O键裂解证明BPA回收的可行性.
- 开发基质促进裂变方法,显示BPA从环氧聚合物回收的高潜力.
结论:
- 脱聚合为耐热聚合物回收利用提供了一个有前途的途径,特别是对于大量的PU和环氧材料.
- 单体回收策略正在推进,PU回收显示了近期的工业潜力.
- 需要进一步的研究来扩大环氧回收工艺,但进展表明,未来的能源效率,通过单体回收封闭循环回收.
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