• Original Paper: Sol-gel and hybrid materials for energy, environment and building applications
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Sol-gel synthesis and characterization of microencapsulated strontium titanate-myristic acid phase change material for thermal energy storage


In the present study, a novel strontium titanate-myristic acid (MA) microencapsulated phase change material in three different compositions was prepared by a simple sol-gel technique with strontium titanate as the shell and MA as the core material. The X-ray diffraction, Fourier-transformed infrared spectroscopy, and energy-dispersive X-ray spectroscopy confirm the formation of SrTiO3 microencapsulated MA microcapsules. Differential scanning calorimetry analysis confirmed that among the three ratios examined, the (1:2) ratio microencapsulated MA@SrTiO3 particles had a higher melting temperature of 53.41 °C and a latent heat of fusion of 91.90 J/g in comparison to its counterparts. The encapsulation ratio of 42% and efficiency of 46% has been achieved for the (1:2) ratio sample. Thermogravimetry results revealed excellent thermal endurance and stability owing to the presence of strontium titanate shell, demonstrating that the fabricated MA@SrTiO3 has adequate potentials for thermal energy storage application.


  • A novel strontium titanate-myristic acid microencapsulated phase change material was prepared by sol-gel method.

  • The (1:2) microcapsules showed higher melting temperature of 53.41 °C and latent heat of 91.90 J/g.

  • The (1:2) ratio of microcapsules showed an encapsulation ratio of 42%.

  • The microcapsules showed higher thermal endurance owing to the presence of SrTiO3 shell.

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We acknowledge Department of Chemistry, IIT Madras, and Central Instrumentation Facility (CIF), Pondicherry University for the help rendered for characterization of the samples. We thank Dr. BM Jaffar Ali, Dr. P Elumalai, Ms K Alamelu, Ms L Shiamala, and A Prasad for their valuable suggestions.

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Correspondence to Arunachalam Subramanian.

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Subramanian, A., Appukuttan, S. Sol-gel synthesis and characterization of microencapsulated strontium titanate-myristic acid phase change material for thermal energy storage. J Sol-Gel Sci Technol 94, 573–581 (2020). https://doi.org/10.1007/s10971-019-05084-2

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  • Latent heat
  • Microencapsulation
  • Myristic acid
  • Phase change materials: SrTiO3
  • Thermal energy storage