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<p>Paraffin, which is often used as an additive in a variety of products, poses a substantial fire risk. Two strategies can be used to mitigate this risk: adhering to proper fire safety guidelines during use, and enhancing the flame-retardant properties of paraffin. Phosphorus-containing ionic liquids (ILs) offer potential advantages in improving the thermal properties of paraffin. In this study, we employed two ILs: 1-butyl-3-methylimidazolium dibutylphosphate ([Bmim][DBP]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF<sub>6</sub>]). To enable paraffin to coat the ILs, diatomite containing the IL was added to liquid-state paraffin, which was then solidified to form the test samples. Simultaneous thermogravimetric analysis and thermogravimetric analysis revealed that these samples exhibited a lower thermal peak relative to pure paraffin. Additionally, both the initial and final pyrolysis temperatures (<i>T</i><sub>i</sub> and <i>T</i><sub>f</sub>, respectively) were delayed compared with the control. Fourier-transform infrared spectroscopy results indicated carbon dioxide and alkanes as the thermal decomposition products. Appropriate thermokinetic models were used to determine the apparent activation energy (<i>E</i><sub>a</sub>) for thermal decomposition. Overall, paraffin samples containing 8.0 mass% of [Bmim][DBP] and 4.0 mass% of [Bmim][PF<sub>6</sub>] possessed optimal flame-retardant properties.</p>

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Effects of adding phosphorus-containing ionic liquids on the flammability and thermal stability of paraffin

  • 期刊论文

  • 发表日期：

    2025年2月7日

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  • Yu-Cheng Lin,
  • Wei-Cheng Lin,
  • Gan-Syue Guo,
  • Yi-Chun Yu,
  • Chi-Min Shu

摘要

Paraffin, which is often used as an additive in a variety of products, poses a substantial fire risk. Two strategies can be used to mitigate this risk: adhering to proper fire safety guidelines during use, and enhancing the flame-retardant properties of paraffin. Phosphorus-containing ionic liquids (ILs) offer potential advantages in improving the thermal properties of paraffin. In this study, we employed two ILs: 1-butyl-3-methylimidazolium dibutylphosphate ([Bmim][DBP]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]). To enable paraffin to coat the ILs, diatomite containing the IL was added to liquid-state paraffin, which was then solidified to form the test samples. Simultaneous thermogravimetric analysis and thermogravimetric analysis revealed that these samples exhibited a lower thermal peak relative to pure paraffin. Additionally, both the initial and final pyrolysis temperatures (Ti and Tf, respectively) were delayed compared with the control. Fourier-transform infrared spectroscopy results indicated carbon dioxide and alkanes as the thermal decomposition products. Appropriate thermokinetic models were used to determine the apparent activation energy (Ea) for thermal decomposition. Overall, paraffin samples containing 8.0 mass% of [Bmim][DBP] and 4.0 mass% of [Bmim][PF6] possessed optimal flame-retardant properties.