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<p>The thermal protection system is a critical component designed to prevent solid rocket motors (SRMs) from experiencing structural failure caused by the intense heat generated during operation. The focus of this research was directed toward exploring recent advancements in flame-retardant materials utilized for thermal insulation, with specific emphasis on the incorporation of metal–organic frameworks (MOFs) to enhance thermal stability. In this study, specific transition metal-BDC MOF (MOF-71(Co)) was synthesized using a hydrothermal method, and the impact of integrating these MOFs into nitrile butadiene rubber (NBR) composites was investigated and monitored. Overall, the inclusion of MOFs enhanced the interfacial compatibility and processing characteristics of the composites. Furthermore, they bolstered the mechanical properties and fortified the matrix, while ensuring that other performance criteria remained within acceptable parameters. To assess the thermal stability and ablative resistance of the fabricated composites, an oxy-acetylene flame test was employed. Findings indicated that the thermal insulation efficacy of the composite is greatly influenced by both the type of MOF utilized incorporated therein. Specimen containing 10 parts per hundred rubber (phr) of MOF-71(Co) demonstrated superior mechanical and ablative characteristics attributed to the development of a dense and cohesive char layer. This layer serves as an effective barrier against heat transfer, thereby surpassing other samples in terms of enhanced thermal insulation performance.</p>

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Assessing Co-MOF as a flame retardant for acrylonitrile butadiene rubber-based heat shielding materials

  • 期刊论文

  • 发表日期：

    2025年1月8日

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  • A. Elashker,
  • Mahmoud Y. Zorainy,
  • Basem Zaghloul,
  • A. M. Eldakhakhny,
  • M. Mokhtar Kotb

摘要

The thermal protection system is a critical component designed to prevent solid rocket motors (SRMs) from experiencing structural failure caused by the intense heat generated during operation. The focus of this research was directed toward exploring recent advancements in flame-retardant materials utilized for thermal insulation, with specific emphasis on the incorporation of metal–organic frameworks (MOFs) to enhance thermal stability. In this study, specific transition metal-BDC MOF (MOF-71(Co)) was synthesized using a hydrothermal method, and the impact of integrating these MOFs into nitrile butadiene rubber (NBR) composites was investigated and monitored. Overall, the inclusion of MOFs enhanced the interfacial compatibility and processing characteristics of the composites. Furthermore, they bolstered the mechanical properties and fortified the matrix, while ensuring that other performance criteria remained within acceptable parameters. To assess the thermal stability and ablative resistance of the fabricated composites, an oxy-acetylene flame test was employed. Findings indicated that the thermal insulation efficacy of the composite is greatly influenced by both the type of MOF utilized incorporated therein. Specimen containing 10 parts per hundred rubber (phr) of MOF-71(Co) demonstrated superior mechanical and ablative characteristics attributed to the development of a dense and cohesive char layer. This layer serves as an effective barrier against heat transfer, thereby surpassing other samples in terms of enhanced thermal insulation performance.