Reversible Schiff-base chemistry enables thermosetting smart composites with versatile properties

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2024-11-05 DOI:10.1016/j.coco.2024.102153

Ping Yu , Haiyue Wang , Changyi You , Zichen Jia , Qirui Huang , Yi Wang , Yanpei Qu , Xinyu Dong , Ruiguang Li , Yumeng Xin , Hongfei He , Ting Li , Bin Yu

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Abstract

Fibre-reinforced polymer composites have become indispensable structural materials in modern life and global industry due to their superior specific properties and improved energy efficiency. However, the irreversibility of commercially available thermoset matrices, characterized by covalent cross-linking, poses challenges to both the recyclability and the enhancement of functionality. Herein, inspired by living tissues, we demonstrated recyclable, reprocessing, self-growing, and thermally/water modulated carbon fibre reinforced polyimine composites at low processing temperatures (≤110 °C, without any catalyst), realizing the intelligent composites. The tensile strength and average friction coefficients of our composites were 129.1 MPa and 0.52, respectively. Moreover, the chemical welding and self-growing mechanism of our system were deeply explored. The process enabled the recovery of clean and intact carbon fibres. We aim for this work to further deepen the understanding of dynamic polyimine networks with semi-aromatic skeleton, and facilitate the preparation of smart, adaptive and pluripotent composites.

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可逆的席夫碱化学使热固性智能复合材料具有多种特性

纤维增强聚合物复合材料因其卓越的特殊性能和更高的能效，已成为现代生活和全球工业中不可或缺的结构材料。然而，以共价交联为特征的市售热固性基材的不可逆性给可回收性和增强功能性带来了挑战。在此，我们受活组织的启发，在低加工温度（≤110 °C，无需任何催化剂）下展示了可回收、再加工、自生长和热/水调制的碳纤维增强聚酰亚胺复合材料，实现了智能复合材料。复合材料的拉伸强度和平均摩擦系数分别为 129.1 MPa 和 0.52。此外，我们还深入探讨了系统的化学焊接和自生长机理。该工艺能够回收干净完整的碳纤维。我们希望通过这项工作进一步加深对具有半芳香族骨架的动态聚酰亚胺网络的理解，促进智能、自适应和多能复合材料的制备。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.