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APTES modification of ZIF-67@M(OH)(OCH3) for enhanced flame retardancy and mechanical properties of epoxy resins

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Abstract

In this work, we employed a two-step modification process to improve the properties of 2D bimetallic nanoplates M(OH)(OCH3) (M = Co, Ni), which were recently proven as a promising “nano-flame retardant”. The nanoplates were in situ modified with metal-organic framework ZIF-67 first and then silanized with a coupling agent APTES. Epoxy resin (EP) nanocomposites were fabricated using the functionalized M(OH)(OCH3). We investigated the performance of the nanocomposites in flame retardance and thermal stability. The results showed that 3% of APTES@ZIF-67@M(OH)(OCH3) gave the EP nanocomposite the V-1 rating in UL-94 test and the highest limited oxygen index of 27.6%. Moreover, the pHRR value of EP/APTES@ZIF-67@M 3% was reduced by 20.0% and 9.6%, respectively, compared to neat EP and EP/ZIF-67@M 3%. Regarding the mechanical properties, the Tensile properties and energy storage modulus of EP nanocomposite were both improved with 3% of APTES@ZIF-67@M(OH)(OCH3). The GC-MS test results revealed that the functionalized M(OH)(OCH3) significantly increased the cross-linking propensity of the EP matrix upon combustion, leading to the formation of a dense char layer. This study demonstrates the great potential of M(OH)(OCH3) as a highly efficient “nano-flame retardant” with tunable functionality.

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The data are available from the corresponding author upon sensible request.

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Acknowledgements

This work was financially supported by the Natural Science Research Project of Universities in Anhui Province (KJ2020A0326); Anhui Province Natural Science Foundation (2008085QE269).

Funding

Natural Science Research Project of Universities in Anhui Province, KJ2020A0326, Xiang Dong, Anhui Province Natural Science Foundation, 2008085QE269, Xiang Dong

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Authors and Affiliations

  1. School of Safety Science and Engineering, Anhui University of Science and Technology, Huainan, 232001, China

    Xiang Dong, De-long Li, Le Xie, Xiangguang Fan & Yu-xin Feng

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  1. Xiang Dong
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Dong, X., Li, Dl., Xie, L. et al. APTES modification of ZIF-67@M(OH)(OCH3) for enhanced flame retardancy and mechanical properties of epoxy resins. J Polym Res 31, 40 (2024). https://doi.org/10.1007/s10965-024-03879-8

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