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Sol-gel synthesis and characterization of microencapsulated strontium titanate-myristic acid phase change material for thermal energy storage

  • Original Paper: Sol-gel and hybrid materials for energy, environment and building applications
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Abstract

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.

Highlights

  • 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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Acknowledgements

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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Authors and Affiliations

  1. Centre for Green Energy Technology, Madanjeet School of Green Energy Technologies, Pondicherry University, Puducherry, 605 014, India

    Arunachalam Subramanian & Sreekumar Appukuttan

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  1. Arunachalam Subramanian
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  2. Sreekumar Appukuttan
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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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  • DOI: https://doi.org/10.1007/s10971-019-05084-2

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