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<p>Two-dimensional layered nano-flame retardants have attracted considerable interest because of their unique lamellar structural characteristics. Numerical simulation is one of important means to further understand the flame retardants mechanisms. In this paper, epoxy resin/organic montmorillonite (EP/OMMT) two-dimensional layered nanocomposites were prepared and testing instruments such as cone calorimeters were employed to analyze their thermal response<b>–</b>pyrolysis<b>–</b>combustion processes. A numerical model of the thermal response<b>–</b>pyrolysis<b>–</b>combustion process was established and segmented into the preheating stage and the pyrolysis<b>–</b>combustion stage. The thermal properties, including thermal conductivity and specific heat capacity, were tested and integrated as input parameters into the model. Following this, the sensitivity of these thermal properties was evaluated. The results demonstrate that variations in the thermal conductivity of the char layer, along with thermal decomposition temperature and density, significantly influence the temperature distribution of the specimens compared to other thermal properties. Ultimately, the temperature distribution, mass loss rate, and heat release rate of the composites were simulated and validated with experimental results. The proposed numerical simulation method is effective and can reliably predict the thermal response and pyrolysis<b>–</b>combustion behavior of EP/OMMT two-dimensional layered nanocomposites in fire scenarios.</p>

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Simulation on thermal response–pyrolysis–combustion process of EP/OMMT two-dimensional layered nanocomposites

  • 期刊论文

  • 发表日期：

    2025年9月30日

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  • Jinxiu Song,
  • Meixue Song,
  • Dan Meng,
  • Yapeng Wang,
  • Yunfei Cheng,
  • Zheng Wang,
  • Feng Zhang

摘要

Two-dimensional layered nano-flame retardants have attracted considerable interest because of their unique lamellar structural characteristics. Numerical simulation is one of important means to further understand the flame retardants mechanisms. In this paper, epoxy resin/organic montmorillonite (EP/OMMT) two-dimensional layered nanocomposites were prepared and testing instruments such as cone calorimeters were employed to analyze their thermal response–pyrolysis–combustion processes. A numerical model of the thermal response–pyrolysis–combustion process was established and segmented into the preheating stage and the pyrolysis–combustion stage. The thermal properties, including thermal conductivity and specific heat capacity, were tested and integrated as input parameters into the model. Following this, the sensitivity of these thermal properties was evaluated. The results demonstrate that variations in the thermal conductivity of the char layer, along with thermal decomposition temperature and density, significantly influence the temperature distribution of the specimens compared to other thermal properties. Ultimately, the temperature distribution, mass loss rate, and heat release rate of the composites were simulated and validated with experimental results. The proposed numerical simulation method is effective and can reliably predict the thermal response and pyrolysis–combustion behavior of EP/OMMT two-dimensional layered nanocomposites in fire scenarios.