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<p>This study primarily analysed the self-fabricated ionic gel aimed at enhancing the performance of composite materials prepared from polyvinyl alcohol and cellulose nanofibre by adding imidazolium ionic liquids (ILs). Thermal stability and electrochemical analysis tests were conducted. Initially, thermogravimetric analysis was performed using a thermogravimetric analyser (TGA). Based upon the results, the optimal IL addition ratio was selected for further experiments. Dynamic heating TGA was used to calculate the apparent activation energy (<i>E</i><sub>a</sub>) through three thermokinetic models. The analysis of the synthesised gels indicated that certain ILs as modifying additives could effectively ameliorate thermal stability. Specifically, the sample containing 4.0&#xa0;mass% 1-ethyl-3-methylimidazolium hexafluorophosphate ([Emim][PF<sub>6</sub>]) exhibited a decomposition onset temperature (<i>T</i><sub>o</sub>) of 253&#xa0;°C, a derivative thermogravimetric analysis (maximum mass loss rate, <i>DTG</i><sub>max)</sub> reduced to 5.4&#xa0;mass%&#xa0;min<sup>−1</sup>, and an <i>E</i><sub>a</sub> reaching 234.8&#xa0;kJ&#xa0;mol<sup>−1</sup>. Furthermore, the sample containing 2.0&#xa0;mass% 1-ethyl-3-methylimidazolium p-toluenesulfonate ([Emim][TOS]) demonstrated optimal ionic conductivity, reaching 0.054&#xa0;mS&#xa0;cm<sup>−1</sup>.</p>

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Using TGA to evaluate the effect of three ionic liquids on the thermal stability of ionogel membrane and their application in synthesis

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • Guan-Lin Chen,
  • Sheng-Wei Liao,
  • Gan-Syue Guo,
  • Chi-Min Shu

摘要

This study primarily analysed the self-fabricated ionic gel aimed at enhancing the performance of composite materials prepared from polyvinyl alcohol and cellulose nanofibre by adding imidazolium ionic liquids (ILs). Thermal stability and electrochemical analysis tests were conducted. Initially, thermogravimetric analysis was performed using a thermogravimetric analyser (TGA). Based upon the results, the optimal IL addition ratio was selected for further experiments. Dynamic heating TGA was used to calculate the apparent activation energy (Ea) through three thermokinetic models. The analysis of the synthesised gels indicated that certain ILs as modifying additives could effectively ameliorate thermal stability. Specifically, the sample containing 4.0 mass% 1-ethyl-3-methylimidazolium hexafluorophosphate ([Emim][PF6]) exhibited a decomposition onset temperature (To) of 253 °C, a derivative thermogravimetric analysis (maximum mass loss rate, DTGmax) reduced to 5.4 mass% min−1, and an Ea reaching 234.8 kJ mol−1. Furthermore, the sample containing 2.0 mass% 1-ethyl-3-methylimidazolium p-toluenesulfonate ([Emim][TOS]) demonstrated optimal ionic conductivity, reaching 0.054 mS cm−1.