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<p>The present research proposes a novel&#xa0;leakage-proof, thermally stable material with better thermal conductivity (TC) and latent heat for thermal energy storage (TES)&#xa0;applications. In this regard, the effect of different wt. % (i.e., 10% 15%, and 20%)&#xa0;impregnation of&#xa0;SiO<sub>2</sub>@TiO<sub>2</sub> (silica titanium core–shell&#xa0;nanoparticles (NPs))&#xa0;on paraffin wax has been studied.&#xa0;SiO<sub>2</sub>&#xa0;NPs, and&#xa0;SiO<sub>2</sub>@TiO<sub>2</sub> core–shell NPs&#xa0;have been synthesized by the Stöber and&#xa0;Chemical co-precipitation method.&#xa0;The SiO<sub>2</sub>@TiO<sub>2</sub>/Paraffin (STPCM3) composite&#xa0;showed the highest shape stability, so further to assess the physical, chemical morphological, and thermal properties of composite materials, STPCM3&#xa0;sample has been carried out by different characterization techniques. Results of x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and Fourier transform infrared (FTIR) show the&#xa0;crystalline nature of STPCM3 composite,&#xa0;homogeneous mixing of paraffin and SiO<sub>2</sub>@TiO<sub>2</sub>&#xa0;core–shell NPs without any chemical interaction.&#xa0;Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) results revealed that the thermal degradation of paraffin wax is delayed&#xa0;and 202.2&#xa0;J/g is the latent heat of STPCM3 composite. The laser flash analysis (LFA) results revealed that TC&#xa0;of STPCM3 composite increases significantly from 0.19 W/m&#xa0;°C to 0.91 W/m&#xa0;°C.</p>

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Enhanced Thermal Conductivity and Stability of Paraffin PCM via SiO2@TiO2 Core–Shell Nanoparticle Impregnation

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Neetu Bora,
  • Deepika P. Joshi

摘要

The present research proposes a novel leakage-proof, thermally stable material with better thermal conductivity (TC) and latent heat for thermal energy storage (TES) applications. In this regard, the effect of different wt. % (i.e., 10% 15%, and 20%) impregnation of SiO2@TiO2 (silica titanium core–shell nanoparticles (NPs)) on paraffin wax has been studied. SiO2 NPs, and SiO2@TiO2 core–shell NPs have been synthesized by the Stöber and Chemical co-precipitation method. The SiO2@TiO2/Paraffin (STPCM3) composite showed the highest shape stability, so further to assess the physical, chemical morphological, and thermal properties of composite materials, STPCM3 sample has been carried out by different characterization techniques. Results of x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and Fourier transform infrared (FTIR) show the crystalline nature of STPCM3 composite, homogeneous mixing of paraffin and SiO2@TiO2 core–shell NPs without any chemical interaction. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) results revealed that the thermal degradation of paraffin wax is delayed and 202.2 J/g is the latent heat of STPCM3 composite. The laser flash analysis (LFA) results revealed that TC of STPCM3 composite increases significantly from 0.19 W/m °C to 0.91 W/m °C.