In Situ-Generated Heat-Resistant Hydrogen-Bonded Organic Framework for Remarkably Improving Both Flame Retardancy and Mechanical Properties of Epoxy Composites,ACS Applied Materials & Interfaces

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In Situ-Generated Heat-Resistant Hydrogen-Bonded Organic Framework for Remarkably Improving Both Flame Retardancy and Mechanical Properties of Epoxy Composites
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-09-26 , DOI: 10.1021/acsami.3c09197
Yingbing Zou ₁ , Wenqi Cui ₁ , Denglong Chen ₂ , Fubin Luo ₁ , Hongzhou Li ₁

Affiliation

In this study, the heat-resistant hydrogen-bonded organic framework (HOF) material HOF-FJU-1 was synthesized via in situ generation and then used as flame retardants (FRs) to improve the flame retardancy of epoxy resin (EP). HOF-FJU-1 can maintain high crystallinity at 450 °C and thus function as a flame retardant in EP. The study found that HOF-FJU-1 facilitates the improvement of char formation in EP, thus inhibiting heat transfer and smoke release during combustion. For EP/HOF-FJU-1 composites, the in situ-generated HOF-FJU-1 can remarkably improve both the mechanical properties and the flame retardancy of EP. Furthermore, the in situ-generated HOF-FJU-1 has better fire safety than the ex situ-generated HOF-FJU-1 at the same filling content. Thermal degradation products and flame retardation mechanisms in the gas and condensed phases were further investigated. This work demonstrates that the in situ-generated HOF-FJU-1 is promising to be an excellent flame-retardant candidate.

中文翻译：

原位生成耐热氢键有机框架可显着提高环氧复合材料的阻燃性和机械性能

本研究通过原位生成法合成了耐热氢键有机骨架（HOF）材料HOF-FJU-1，并将其用作阻燃剂（FR）来提高环氧树脂（EP）的阻燃性能。HOF-FJU-1可以在450℃下保持高结晶度，从而在EP中起到阻燃剂的作用。研究发现HOF-FJU-1有利于改善EP中的炭形成，从而抑制燃烧过程中的传热和烟雾释放。对于EP/HOF-FJU-1复合材料，原位生成的HOF-FJU-1可以显着提高EP的机械性能和阻燃性。此外，在相同填充量下，原位生成的HOF-FJU-1比异位生成的HOF-FJU-1具有更好的防火安全性。进一步研究了气相和凝聚相的热降解产物和阻燃机制。这项工作表明，原位生成的 HOF-FJU-1 有希望成为优秀的阻燃剂候选者。

更新日期：2023-09-26

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