在那里又回来:从酶化水解聚合物中回收二甲酸以进行再合成
Chiara Siracusa1,2, Virginia Celestre3, Felice Quartinello1,2
1acib GmbH, Konrad-Lorenz-Strasse 20, 3430 Tulln an der Donau, Austria.
ACS sustainable resource management
|March 5, 2025
概括
这项研究证明了使用Humicola insolens cutinase的塑料废弃物的酶去聚合,使得高纯度的甲酸 (TPA) 可回收. 回收的TPA成功地重新聚合成聚乙烯二甲 (PET).
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:
- 聚乙烯二甲 (PET) 是一种广泛使用的塑料,主要用于包装.
- 目前的铁酸 (TPA) 生产,一个关键的PET单体,依赖于化石燃料.
- 此外,TPA也是可生物降解聚合物的组成部分,例如聚-1,4-丁酸-co-1,4-丁二甲 (PBAT).
研究的目的:
- 探索一种环保的方法来去聚合PET和PBAT.
- 从塑料废弃物中回收高纯度二甲酸 (TPA),包括混合塑料.
- 为了研究重新聚合回收的TPA到PET的可行性.
主要方法:
- 使用Humicola insolens cutinase的PET,PBAT和混合塑料废物的酶去聚合.
- 通过酸化隔离和净化铁酸 (TPA).
- 使用富里埃变换红外光谱,1H-NMR光谱和热重力测量分析对纯化的TPA进行表征.
- 合成双乙二甲 (BHET) 并随后再聚合成PET.
主要成果:
- 塑料的成功脱聚合和TPA的回收.
- 隔离TPA的高纯度通过光谱和热分析证实.
- 鉴定了PET前体合成中的挑战,原因是TPA中的污染物.
- 再聚合回收的TPA产生了PET,其分子量受TPA纯度和催化剂的影响.
结论:
- 米不的皮质酶为塑料脱聚合和TPA回收提供了一个环保的替代方案.
- 从混合塑料废物中回收TPA是可行的.
- 对于成功的重聚合和实现所需的聚分子量,TPA纯度至关重要.
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