Synthesis and characterization of the n-butyl palmitate as an organic phase change material

Abstract

In this research, the n-butyl palmitate was synthesized using the esterification reaction of the PA with n-butanol. The 1H nuclear magnetic resonance and Fourier transform infrared illustrated that the hydroxyl group and carboxyl group disappeared, and the ester bond appeared after the reaction, explaining that n-butyl palmitate was successfully fabricated. The differential scanning calorimetry indicated that the phase-transition temperature and latent heat are 12.6 °C and 127.1 J g−1, which was suited to use in low-temperature fields such as food, pharmaceutical, and biomedical. The thermogravimetric analysis suggested that it had great thermal stability during the phase change process. In addition, the thermal conductivity of the n-butyl palmitate was slightly higher than other fatty acid ester, and the 500 thermal cycles test results indicated that it had excellent thermal reliability. Therefore, the n-butyl palmitate is deduced to share great thermal energy storage ability in terms of latent heat thermal energy system applications.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (31570572, 31670516 and 31600459).

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Correspondence to Qingwen Wang or Liping Li.

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Ma, L., Guo, C., Ou, R. et al. Synthesis and characterization of the n-butyl palmitate as an organic phase change material. J Therm Anal Calorim 136, 2033–2039 (2019). https://doi.org/10.1007/s10973-018-7846-y

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Keywords

  • Palmitic acid ester
  • Phase change material
  • Esterification
  • Thermal energy storage