一种可分解和回收塑料瓶的PET脱聚合酶
V Tournier1, C M Topham1, A Gilles1
1TBI, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France.
Nature
|April 10, 2020
概括
一个改进的酶在10小时内有效地将90%的塑料废物 (聚乙烯二甲) 分解为单体. 这一突破使得高质量的回收塑料能够产生,支持PET循环经济.
科学领域:
- 生物技术
- 聚合物科学
- 环境科学
背景情况:
- 每年都会积累数百万的塑料废物,尤其是聚乙烯二甲 (PET).
- 目前PET的热力学回收会降低其机械性能,因此需要进行新合成.
- 聚乙烯在化学上耐水解,现有的聚乙烯酸酶的生产力有限.
研究的目的:
- 开发一种高效的PET酶,用于塑料废物的脱聚合.
- 实现高生产率和近乎完全的PET脱聚合成单体.
- 为循环经济生产高质量的回收PET的可行性.
主要方法:
- 一个PET酶的工程和优化.
- 评估在10小时内脱聚合PET废物的酶性能.
- 量化脱聚合效率和酶生产率 (每公升甲酸盐每小时).
- 评估通过酶去聚合产生的回收PET的特性.
主要成果:
- 优化的PET酶在10小时内实现了至少90%的PET脱聚合.
- 这种酶的生产率高达每小时每升16.7克.
- 这种性能超过了之前报告的所有PET水溶酶,包括Ideonella sakaiensis酶的变体.
- 酶回收PET的性能与原始石化PET相美.
结论:
- 已经开发出一种高效的PET酶,使其能够有效地回收塑料废物.
- 该酶的高生产率和效率为PET废物积累提供了可行的解决方案.
- 酶回收可以生产高质量的PET,为可持续的PET循环经济做出贡献.
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