混合塑料的单脱聚合使用双酶系统
Yannick Branson1, Jiawei Liu1,2, Louis Schmidt3
1Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Felix-Hausdorff-Str. 4, 17489, Greifswald, Germany.
ChemSusChem
|December 23, 2024
概括
这项研究引入了一种双酶系统,用于在不分类的情况下回收PET,PBAT和TPU等混合塑料. 这种创新方法有效地将混合聚合物脱聚合成单体,促进可持续的废物管理.
科学领域:
- 生物技术是生物技术.
- 聚合物科学 聚合物科学
- 环境科学 环境科学
背景情况:
- 全球塑料垃圾是一个重大的环境挑战.
- 当前的酶回收方法通常需要分类,单一的塑料类型.
- 需要有效地回收混合或混合塑料.
研究的目的:
- 用双酶系统研究混合塑料的酶去聚合.
- 评估一子回收混合聚和聚氨回收的可行性.
- 探索一种改进的混合聚合物和增强可降解性的方法.
主要方法:
- 使用了一种双酶系统,其中包括聚化酶 (PES-H1 FY) 和 (多) 尿氨酶 (UMG-SP-2).
- 脱聚合混合聚合物,包括聚乙烯二甲酸盐 (PET),聚乙烯基酸盐-联合二甲酸盐 (PBAT) 和热塑性聚-聚氨 (TPU) 在一反应中.
- 采用色谱量化和减肥测量来确定产品的产量.
- 在聚合物混合中应用了修改后的溶解-沉方法.
主要成果:
- 在96小时后,单体产品的总产量达到39.8±4.4%.
- 体重减轻测量证实了降解,观察到40.9±2.5%.
- 在没有事先分类的情况下,证明了混合PET,PBAT和TPU的成功脱聚合.
- 通过修改的溶解沉技术,展示了改善的聚合物混合物的可降解性.
结论:
- 使用双酶系统的混合塑料的酶去聚合是一种可行的回收策略.
- 这种方法消除了对昂贵而复杂的塑料废物分类的需求.
- 回收的单体可以被净化用于初始聚合物生产,或用于微生物回收成增值产品.
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