Selective Chemical Upcycling of Mixed Plastics Guided by a Thermally Stable Organocatalyst
Selective Chemical Upcycling of Mixed Plastics Guided by a Thermally Stable Organocatalyst
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DOI：
10.1002/anie.202014860
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发表时间：
2021-02-11
影响因子：
16.6
通讯作者：
Sardon, Haritz
中科院分区：
文献类型：
--
作者：
Jehanno, Coralie;Demarteau, Jeremy;Sardon, Haritz
塑料垃圾的化学回收是垃圾填埋和焚烧的一种更绿色的替代方案，并可能为解决塑料垃圾增加带来的环境后果提供解决方案。今天广泛使用的大多数塑料都是为耐用而设计的，因此目前可用的解聚方法通常需要苛刻的条件，当应用于混合和混合塑料饲料时，会产生混合的产品。在此，我们证明了在质子型离子盐TBD：MSA催化剂存在下，BPA-PC和PET糖酵解的能量差异使得这两种常用聚合物能够选择性和顺序地解聚。采用同样的方法，可以从混合塑料废料和工业聚合物混合物中获得功能化的环状碳酸酯。这一方法表明，催化解聚的概念为选择性聚合物回收提供了巨大的潜力，并将塑料废物作为合成高附加值分子的“更绿色”替代原料。
Chemical recycling of plastic waste represents a greener alternative to landfill and incineration, and potentially offers a solution to the environmental consequences of increased plastic waste. Most plastics that are widely used today are designed for durability, hence currently available depolymerisation methods typically require harsh conditions and when applied to blended and mixed plastic feeds generate a mixture of products. Herein, we demonstrate that the energetic differences for the glycolysis of BPA-PC and PET in the presence of a protic ionic salt TBD:MSA catalyst enables the selective and sequential depolymerisation of these two commonly employed polymers. Employing the same procedure, functionalised cyclic carbonates can be obtained from both mixed plastic wastes and industrial polymer blend. This methodology demonstrates that the concept of catalytic depolymerisation offers great potential for selective polymer recycling and also presents plastic waste as a "greener" alternative feedstock for the synthesis of high added value molecules.