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Synthesis and Thermal Properties of Myristic Acid/Nano-TiO2/Carbon Additives Composite Phase Change Materials

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Abstract

A novel composite phase change material, myristic acid (MA)/nano-titanium dioxide (nano-TiO2)/carbon additives, was synthesized via a melt blending method, in which MA serves as phase change material, nano-TiO2 acts as support material, and carbon additives are used as thermally conductive enhancer. A series of leakage tests have shown that MA/nano-TiO2 can maintain shape stability during the phase transition when the content of MA in MA/nano-TiO2 does not exceed 50 %. The FT-IR and XRD results demonstrated that there is no chemical reaction among the various components of the MA/nano-TiO2/carbon additive. When the content of MA is 50 %, the melting temperature of MA/nano-TiO2/carbon additives is about 54 °C and the melting enthalpy is about 80 J·g−1. When the content of all three carbon additives, multiwall carbon nanotubes, graphene, and expanded graphite, is 2.5 %, the corresponding thermal conductivity of MA/nano-TiO2/carbon additives is 0.532 W/(m·K), 1.128 W/(m·K), and 1.382 W/(m·K), respectively. The thermal conductivity of these three types of MA/nano-TiO2/additives is 1.23, 2.62, and 3.21 times that of MA/TiO2, respectively. Moreover, the decomposition temperature of these three types MA/nano-TiO2/carbon additives composites is around 245 °C. Therefore, the working ambient temperature of MA/nano-TiO2/additive composites should be lower than 245 °C.

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The raw data required to reproduce these findings are available upon request to the corresponding author.

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Funding

This research work was funded by the National Natural Science Foundation of China (Grant no. 51676095).

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Authors and Affiliations

  1. School of Physics, Nanjing University, Nanjing, 210093, China

    Tingwei Fu, Wenze Wang & Guiyin Fang

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  1. Tingwei Fu
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  3. Guiyin Fang
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Contributions

TWF contributed to methodology, investigation, and writing of the original draft. WZW contributed to investigation, reviewing of the manuscript. GYF contributed to supervision, project administration, funding acquisition, and reviewing, and editing of the manuscript.

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Correspondence to Guiyin Fang.

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Fu, T., Wang, W. & Fang, G. Synthesis and Thermal Properties of Myristic Acid/Nano-TiO2/Carbon Additives Composite Phase Change Materials. Int J Thermophys 45, 50 (2024). https://doi.org/10.1007/s10765-024-03346-y

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