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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：
具有多重优势的纯天然壳聚糖基聚亚胺玻璃体：解决不可降解塑料垃圾污染的新策略
越来越多的不可降解的石油基塑料废物释放出化学危害，对环境和人类健康构成重大威胁。壳聚糖源自海洋废物，由于其可再生和可降解的性质，是制备塑料替代品的有吸引力的原料。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草醛之间温和且无催化剂的席夫碱反应，提出了一种基于壳聚糖的高性能聚亚胺维三聚体（CS-PI）。 CS-PI 通过将动态亚胺键整合到聚合物网络中而形成，从而具有优异的热加工性和机械性能。 CS-PI薄膜的拉伸强度和杨氏模量分别达到38.72 MPa和3.20 GPa，明显高于商业石油基塑料和生物塑料。此外，CS-PI薄膜还表现出良好的透光性、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，从而实现可持续循环。因此，这项工作提供了一种新的设计策略，用于开发全天然环保聚合物作为石油基塑料的可持续替代品，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：
具有多重优势的纯天然壳聚糖基聚亚胺玻璃体：解决不可降解塑料垃圾污染的新策略
越来越多的不可降解的石油基塑料废物释放出化学危害，对环境和人类健康构成重大威胁。壳聚糖源自海洋废物，由于其可再生和可降解的性质，是制备塑料替代品的有吸引力的原料。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草醛之间温和且无催化剂的席夫碱反应，提出了一种基于壳聚糖的高性能聚亚胺维三聚体（CS-PI）。 CS-PI 通过将动态亚胺键整合到聚合物网络中而形成，从而具有优异的热加工性和机械性能。 CS-PI薄膜的拉伸强度和杨氏模量分别达到38.72 MPa和3.20 GPa，明显高于商业石油基塑料和生物塑料。此外，CS-PI薄膜还表现出良好的透光性、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，从而实现可持续循环。因此，这项工作提供了一种新的设计策略，用于开发全天然环保聚合物作为石油基塑料的可持续替代品，从而减少不可降解塑料废物的积累。
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