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Thermal Performances of Myristic Acid/Bentonite/Graphene Composite Phase Change Materials

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Abstract

In this work, composite phase change materials (CPCM) containing myristic acid (MA), bentonite, and graphene were prepared by melt blending method, where MA is phase change material (PCM), bentonite is supporting material, and graphene is thermal conductivity enhancer. The CPCM containing 50 wt% MA can still maintain the stable morphology during phase change process. The chemical structure, crystal structure and microstructures of CPCM were examined by Fourier transformation infrared spectroscope (FT-IR), X-ray diffractometer (XRD) and scanning electron microscope (SEM), respectively. Differential scanning calorimeter (DSC) analysis indicate that the melting enthalpy is 94 to 97 J·g−1. Thermogravimetric analysis (TGA) demonstrates good thermal stability of the CPCM. Thermal conductivity of the CPCM with 3 wt% graphene can reach 1.09 W⋅(m⋅K)−1, that is 2.37 times that of MA/bentonite. Experimental results indicate that the CPCM have significant improvement with regard to stability and thermal conductivity as compared to the pristine PCM. Moreover, the CPCM still remain good thermal properties after undergoing 100 thermal cycles.

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Data Availability

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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  2. Wenze Wang
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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. Thermal Performances of Myristic Acid/Bentonite/Graphene Composite Phase Change Materials. Int J Thermophys 44, 174 (2023). https://doi.org/10.1007/s10765-023-03287-y

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