The preparation of the polyimine (PI) networks from renewable feedstocks has attracted increasing attention due to the degradability and self-healing capabilities of PI networks, which contribute to sustainable development. However, most of bio-based PI networks possess poor environmental stability and mechanical strength. Herein, natural peach gum w·as employed to construct water-resistant bio-based PI networks with high performances, by the curing reaction of Schiff base between 4-aminobenzoic acid grafted peach gum polysaccharide and vanillin-derived difunctionalized aldehyde. The resultant polyimine networks (PGBV) exhibit high tensile strength and high Young's modulus, due to their unique network structures. Moreover, PGBV-100 demonstrates excellent hydrophobicity, welding, self-healing and reprocessing abilities. Furthermore, PGBV-100 can completely degrade in an aqueous solution of HCl (0.1 M), enabling closed-loop recycling. In this work, a research strategy for constructing bio-based PI networks with high performances is presented and the resultant PGBV networks show promising potential application as materials for transportation and building materials.

中文翻译：

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桃胶基聚亚胺网络，具有防水、高强度和回收性能


由于 PI 网络的可降解性和自愈能力，从可可再生原料制备聚亚胺 （PI） 网络越来越受到关注，这有助于可持续发展。然而，大多数生物基 PI 网络的环境稳定性和机械强度较差。在此，天然桃胶 w·as 通过 4-氨基苯甲酸接枝桃胶多糖和香兰素衍生的双功能化醛之间的席夫碱固化反应，构建高性能的防水生物基 PI 网络。由于其独特的网络结构，所得的聚亚胺网络 （PGBV） 表现出高拉伸强度和高杨氏模量。此外，PGBV-100 表现出优异的疏水性、焊接性、自修复性和再加工能力。此外，PGBV-100 可以在 HCl （0.1 M） 的水溶液中完全降解，从而实现闭环回收。在这项工作中，提出了一种构建高性能生物基 PI 网络的研究策略，所得的 PGBV 网络显示出作为运输材料和建筑材料的潜在应用前景。