Biorenewable and circular polydiketoenamine plastics
Biorenewable and circular polydiketoenamine plastics
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DOI：
10.1038/s41893-023-01160-2
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发表时间：
2023-07-27
影响因子：
27.6
通讯作者：
Helms，Brett A.
中科院分区：
文献类型：
--
作者：
Demarteau，Jeremy;Cousineau，Benjamin;Helms，Brett A.
随着人们对塑料废物对人类健康和环境影响的担忧日益增加，最有希望的解决方案是建立循环塑料经济，在这种经济中，可持续性考虑决定了塑料使用的整个生命周期，包括用生物可再生能源取代石化产品。在这里，我们表明，通过在聚二酮胺（PDK）中加入聚酮三乙酸内酯（TAL），我们提高了这些圆形塑料的工作温度，为迫切需要圆形的应用打开了更宽的大门。通过改变塔尔衍生单体的碳数，聚合物的性能和回收效率都受到影响。简单地使用葡萄糖作为主要碳源，我们设计了一种在补料间歇发酵下生产生物tal的工艺。在不同情景下对这一生物过程的系统分析量化了PDK塑料的环境和经济效益，以及在工业规模上实施时的风险，为生物可再生循环提供了机会。
Amid growing concerns over the human health and environmental impacts of plastic waste, the most promising solution would be to build a circular plastics economy where sustainability considerations dictate the full life cycle of plastics use including replacing petrochemicals with biorenewables. Here we show that by incorporating the polyketide triacetic acid lactone (TAL) in polydiketoenamines (PDK) we increase the working temperature of these circular plastics, opening the door wider to applications where circularity is urgently needed. By varying the number of carbons of TAL-derived monomers, both polymer properties and recycling efficiency are affected. Simply using glucose as the main carbon source, we engineered a process for producing bioTAL under fed-batch fermentation. A systems analysis of this bioprocess under different scenarios quantifies the environmental and economic benefits of PDK plastics and the risks when implemented at an industrial scale, providing opportunities in biorenewable circularity.