New flexible 3D POSS-based COF simultaneously strengthens and toughens epoxy resin (EP) at extreme temperatures

Runze Jin, Yijie Zhang, Donghui Guo, Zhiliang Zhou, Lijie Qu*, Baosheng Xu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This study introduces a novel approach by designing a flexible three-dimensional Covalent Organic Framework (COFs), specifically NH2-POSS-COF, which serves as a uniform cross-linking site within the EP system. This framework provides substantial internal free volume and mitigates stress concentrations by enabling effective energy dissipation during mechanical loading. The research demonstrates that the integration of NH2-POSS-COF significantly enhances the fracture toughness and tensile strength of EP at both RT and cryogenic. These findings open new avenues for optimizing EP performance in low-temperature applications, contributing to the development of high-performance composite materials for aerospace missions.

Original languageEnglish
Article number108846
JournalComposites Part A: Applied Science and Manufacturing
Volume193
DOIs
Publication statusPublished - Jun 2025

Keywords

  • Cryogenic
  • Epoxy resin
  • Flexible 3D COFs
  • Mechanical Property

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