Dual closed-loop chemical recycling of synthetic polymers by intrinsically reconfigurable poly(disulfides)
Dual closed-loop chemical recycling of synthetic polymers by intrinsically reconfigurable poly(disulfides)
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DOI：
10.1016/j.matt.2021.01.014
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发表时间：
2021-02
期刊：
影响因子：
18.9
通讯作者：
Qi Zhang;Yuanxin Deng;Chen‐Yu Shi;B. Feringa;H. Tian;Da‐Hui Qu
中科院分区：
文献类型：
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作者：
Qi Zhang;Yuanxin Deng;Chen‐Yu Shi;B. Feringa;H. Tian;Da‐Hui Qu
塑料的过度使用导致了严重的全球问题，涉及环境、能源和健康问题以及对可持续和可回收替代品的需求。对于循环塑料，开发有效的化学回收方法而不损失性能或允许再加工成新材料提供了巨大的机会。在这里，我们报告了一种本质上可回收和可重构的聚（二硫化物）聚合物，使用天然小分子硫辛酸（TA）作为原料。该材料利用其动态共价开环聚合，在TA单体和两种聚合物产品（包括自修复弹性体和机械坚固的离子膜）之间形成双闭环化学回收网络。在稀碱性水溶液中实现温和、完全解聚为单体，回收单体的收率高达 86%。该聚合物材料可以重复回收和再利用，具有可重构的聚合物成分和可调的机械性能，为可持续功能塑料提供了前景。
The excessive use of plastics has led to severe global problems involving environmental, energy, and health issues and demands for sustainable and recyclable alternatives. Toward circular plastics, the development of efficient chemical recycling methods without loss of properties or allowing reprocessing into new materials offer tremendous opportunities. Here, we report an intrinsically recyclable and reconfigurable poly(disulfide) polymer using a natural small molecule, thioctic acid (TA), as the feedstock. Taking advantage of its dynamic covalent ring-opening polymerization, this material enables a dual closed-loop chemical recycling network among TA monomers and two kinds of polymer products, including self-healing elastomers and mechanically robust ionic films. Mild and complete depolymerization into monomers in diluted alkaline aqueous solution is achieved with yields of recovered monomers up to 86%. The polymer materials can be repeatedly recycled and reused with reconfigurable polymer composition and tunable mechanical properties offering prospects for sustainable functional plastics.