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All-natural chitosan-based polyimine vitrimer with multiple advantages: A novel strategy to solve nondegradable plastic waste pollution
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2023-11-19 , DOI: 10.1016/j.jhazmat.2023.133030 Xiaoqian Zhang 1 , Leyi Lin 1 , Haonan Zhou 1 , Guowen Zhou 1 , Xiaohui Wang 1
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2023-11-19 , DOI: 10.1016/j.jhazmat.2023.133030 Xiaoqian Zhang 1 , Leyi Lin 1 , Haonan Zhou 1 , Guowen Zhou 1 , Xiaohui Wang 1
Affiliation
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The increasing amount of nondegradable petroleum-based plastic waste releases chemical hazards, posing a significant threat to the environment and human health. Chitosan, derived from marine wastes, is an attractive feedstock for the preparation of plastic replacement due to its renewable and degradable nature. However, in most cases, complex chemical modifications of chitosan or hybridization with chemicals from fossil resources are required. Herein, we present a high-performance chitosan-based polyimine vitrimer (CS-PI) through a mild and catalyst-free Schiff base reaction between chitosan and vanillin. The CS-PI were formed by integrating dynamic imine bonds into the polymer networks, resulting in superior thermo-processability and mechanical performances. The tensile strength and Young’s modulus of the CS-PI films reached 38.72 MPa and 3.20 GPa, respectively, which was significantly higher than that of both commercial petroleum-based plastics and bioplastics. Additionally, the CS-PI films exhibited good light transmittance, self-healing ability, reprocess capacity, water resistance, and durability to various organic solvents. Moreover, the CS-PI films could be completely degraded under both acidic and natural conditions, enabling a sustainable circulation. Therefore, this work offers a new design strategy for developing all-natural environmentally friendly polymers as sustainable replacements for petroleum-based plastics, thus reducing the accumulation of nondegradable plastic waste.
中文翻译：
具有多重优势的全天然壳聚糖基聚酰亚胺三聚体：解决不可降解塑料废弃物污染的新策略
越来越多的不可降解的石油基塑料废物会释放出化学危害，对环境和人类健康构成重大威胁。壳聚糖源自海洋废弃物，由于其可再生和可降解的性质，是一种有吸引力的塑料替代品原料。然而，在大多数情况下，需要对壳聚糖进行复杂的化学修饰或与来自化石资源的化学品杂交。在此，我们通过壳聚糖和香兰素之间的温和且无催化剂的希夫碱反应提出了一种高性能壳聚糖基聚酰亚胺三聚体 （CS-PI）。CS-PI 是通过将动态亚胺键集成到聚合物网络中而形成的，从而具有优异的热加工性和机械性能。CS-PI 薄膜的拉伸强度和 Young 模量分别达到 38.72 MPa 和 3.20 GPa，显著高于商业石油基塑料和生物塑料。此外，CS-PI 薄膜表现出良好的透光率、自修复能力、再加工能力、耐水性和对各种有机溶剂的耐久性。此外，CS-PI 薄膜在酸性和自然条件下都可以完全降解，从而实现可持续的循环。因此，这项工作为开发全天然环保聚合物作为石油基塑料的可持续替代品提供了一种新的设计策略，从而减少不可降解塑料废物的积累。
更新日期：2023-11-19
中文翻译：
具有多重优势的全天然壳聚糖基聚酰亚胺三聚体：解决不可降解塑料废弃物污染的新策略
越来越多的不可降解的石油基塑料废物会释放出化学危害，对环境和人类健康构成重大威胁。壳聚糖源自海洋废弃物，由于其可再生和可降解的性质，是一种有吸引力的塑料替代品原料。然而，在大多数情况下，需要对壳聚糖进行复杂的化学修饰或与来自化石资源的化学品杂交。在此，我们通过壳聚糖和香兰素之间的温和且无催化剂的希夫碱反应提出了一种高性能壳聚糖基聚酰亚胺三聚体 （CS-PI）。CS-PI 是通过将动态亚胺键集成到聚合物网络中而形成的，从而具有优异的热加工性和机械性能。CS-PI 薄膜的拉伸强度和 Young 模量分别达到 38.72 MPa 和 3.20 GPa，显著高于商业石油基塑料和生物塑料。此外，CS-PI 薄膜表现出良好的透光率、自修复能力、再加工能力、耐水性和对各种有机溶剂的耐久性。此外，CS-PI 薄膜在酸性和自然条件下都可以完全降解，从而实现可持续的循环。因此，这项工作为开发全天然环保聚合物作为石油基塑料的可持续替代品提供了一种新的设计策略，从而减少不可降解塑料废物的积累。
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