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<p>In this study, a green eutectic phase change material (EPCM) based on a binary mixture of 1-tetradecanol and oxalic acid was synthesized and characterized. This EPCM, demonstrates promising potential as a green and sustainable candidate for low to medium temperature thermal energy storage (TES) applications. To enhance the thermal properties of the synthesized EPCM, hexagonal boron nitride (hBN) and graphene nanoplatelets (GNP) were incorporated at concentrations of 0.5, 1, and 1.5 wt%. This study presents the first direct comparison of these nanoparticles incorporated into a eutectic fatty acid ester based PCM to evaluate their impact on structural and thermal characteristics. The results demonstrate that GNP achieved the superior enhancement. In the sample containing 1 wt% hBN, the enthalpy value decreased to 174&#xa0;J/g, representing an approximate 4% reduction compared to the pure EPCM, while the thermal conductivity increased by approximately 292%. In the material containing 1 wt% GNP, the latent heat slightly decreased to 176.3&#xa0;J/g, a reduction of only 2.8%, remaining within optimal limits, while the thermal conductivity increased significantly by 462.8%. These findings suggest that the nanoparticle enhanced EPCM, with 1 wt% GNP demonstrating optimal performance, represents a promising candidate for low to medium temperature solar TES applications.</p> Graphical Abstract <p></p>

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Effects of Nano Graphene and Nano Hexagonal Boron Nitride on the Thermal and Structural Properties of Fatty Acid Based Green Eutectic PCM

  • 期刊论文

  • 发表日期：

    2025年12月28日

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  • Nergiz Ulker,
  • Hüsamettin Bulut,
  • Gokhan Demircan,
  • Ahmet Kilic

摘要

In this study, a green eutectic phase change material (EPCM) based on a binary mixture of 1-tetradecanol and oxalic acid was synthesized and characterized. This EPCM, demonstrates promising potential as a green and sustainable candidate for low to medium temperature thermal energy storage (TES) applications. To enhance the thermal properties of the synthesized EPCM, hexagonal boron nitride (hBN) and graphene nanoplatelets (GNP) were incorporated at concentrations of 0.5, 1, and 1.5 wt%. This study presents the first direct comparison of these nanoparticles incorporated into a eutectic fatty acid ester based PCM to evaluate their impact on structural and thermal characteristics. The results demonstrate that GNP achieved the superior enhancement. In the sample containing 1 wt% hBN, the enthalpy value decreased to 174 J/g, representing an approximate 4% reduction compared to the pure EPCM, while the thermal conductivity increased by approximately 292%. In the material containing 1 wt% GNP, the latent heat slightly decreased to 176.3 J/g, a reduction of only 2.8%, remaining within optimal limits, while the thermal conductivity increased significantly by 462.8%. These findings suggest that the nanoparticle enhanced EPCM, with 1 wt% GNP demonstrating optimal performance, represents a promising candidate for low to medium temperature solar TES applications.

Graphical Abstract