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<p>Renewable energy applications are crucial for reducing global warming and advancing the sustainable use of solar energy through thermal energy storage methods. This study focuses on experimental investigation of the impact of graphene nanoplatelets (GNs) on the thermal performance of paraffin-based phase change materials (PCMs) with oleic acid (OA). OA was provided as a surfactant to achieve stabilization and to prevent agglomeration between the nanoparticles and the paraffin wax (PW). Experimental setup was utilized to analyse the melting and freezing cycles of the materials. Experimental findings showed that oleic acid improved graphene nanoparticle homogeneous dispersion. Thermal conductivity increased by 38.7% in PW+GN and 45.5% in PW+GN+OA compared to pure PW. Additionally, the 11.4% increase in thermal decomposition temperature indicated an improvement in the material's thermal stability. Among all the investigated samples, PW+GN demonstrated the highest melting and freezing enthalpy values (120.3/115 J/g), exceeding those of both pure PW (111/77.1 J/g) and PW+GN+OA (100.6/98.7 J/g), thereby confirming its superior energy storage performance. The developed material has been presented in the literature as having potential applications in solar energy systems, thermal management, and energy efficiency targets.</p>

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The effect of modified graphene nanoplatelet on the thermal properties of paraffin wax: an experimental study

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • Nergiz Ulker,
  • Hüsamettin Bulut,
  • Gokhan Demircan

摘要

Renewable energy applications are crucial for reducing global warming and advancing the sustainable use of solar energy through thermal energy storage methods. This study focuses on experimental investigation of the impact of graphene nanoplatelets (GNs) on the thermal performance of paraffin-based phase change materials (PCMs) with oleic acid (OA). OA was provided as a surfactant to achieve stabilization and to prevent agglomeration between the nanoparticles and the paraffin wax (PW). Experimental setup was utilized to analyse the melting and freezing cycles of the materials. Experimental findings showed that oleic acid improved graphene nanoparticle homogeneous dispersion. Thermal conductivity increased by 38.7% in PW+GN and 45.5% in PW+GN+OA compared to pure PW. Additionally, the 11.4% increase in thermal decomposition temperature indicated an improvement in the material's thermal stability. Among all the investigated samples, PW+GN demonstrated the highest melting and freezing enthalpy values (120.3/115 J/g), exceeding those of both pure PW (111/77.1 J/g) and PW+GN+OA (100.6/98.7 J/g), thereby confirming its superior energy storage performance. The developed material has been presented in the literature as having potential applications in solar energy systems, thermal management, and energy efficiency targets.