A 1-Tetradecanol-1, 10-Decanediol Binary Eutectic Mixture/Expanded Graphite Composite Phase Change Materials for Thermal Energy Storage

Yi, Jun; Hu, Rongjun; Zhan, Gaofei; Zeng, Qiu; Zou, Jiyong; Xie, Yu; You, Shengyong

doi:10.3390/ma19020371

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A 1-Tetradecanol-1, 10-Decanediol Binary Eutectic Mixture/Expanded Graphite Composite Phase Change Materials for Thermal Energy Storage

by

Jun Yi

^1,2,†,

Rongjun Hu

^2,†,

Gaofei Zhan

³,

Qiu Zeng

²,

Jiyong Zou

²

,

Yu Xie

^1,*

and

Shengyong You

^2,*

¹

School of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China

²

Institute of Materials and Intelligent Manufacturing, Jiangxi Academy of Sciences, Nanchang 330096, China

³

School of Chemistry and Materials Science, East China University of Technology, Nanchang 330013, China

^*

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Materials 2026, 19(2), 371; https://doi.org/10.3390/ma19020371

Submission received: 11 December 2025 / Revised: 13 January 2026 / Accepted: 14 January 2026 / Published: 16 January 2026

(This article belongs to the Section Advanced Composites)

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Abstract

Organic phase change materials show potential for thermal energy storage, but their scalable implementation is limited by fixed phase change temperatures, molten leakage, and low thermal conductivity. To address the temperature constraint, a binary eutectic system of 1-tetradecanol and 1,10-decanediol is prepared, expanding the operational temperature range for building thermal management. Compositing the eutectic with expanded graphite yields a composite material that exhibits a low leakage and a markedly improved thermal conductivity of 4.642 W/(m·K), which is approximately 12 times that of the pure eutectic. The composite maintains distinct phase transition properties, with melting and solidification temperatures of 37.77 °C and 29.38 °C and corresponding latent heats of 218.80 J/g and 216.66 J/g. It also demonstrates a good cycling stability, retaining over 87% of the original latent heat after 2000 thermal cycles. While these findings remain valid under controlled conditions, further studies are required to evaluate their practical feasibility and long-term durability in real-world scenarios. This work establishes a systematic approach for fabricating composite phase change materials and provides a promising candidate for building thermal management applications.

Keywords: phase change material; 1-tetradecanol; 1,10- decanediol; expanded graphite

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MDPI and ACS Style

Yi, J.; Hu, R.; Zhan, G.; Zeng, Q.; Zou, J.; Xie, Y.; You, S. A 1-Tetradecanol-1, 10-Decanediol Binary Eutectic Mixture/Expanded Graphite Composite Phase Change Materials for Thermal Energy Storage. Materials 2026, 19, 371. https://doi.org/10.3390/ma19020371

AMA Style

Yi J, Hu R, Zhan G, Zeng Q, Zou J, Xie Y, You S. A 1-Tetradecanol-1, 10-Decanediol Binary Eutectic Mixture/Expanded Graphite Composite Phase Change Materials for Thermal Energy Storage. Materials. 2026; 19(2):371. https://doi.org/10.3390/ma19020371

Chicago/Turabian Style

Yi, Jun, Rongjun Hu, Gaofei Zhan, Qiu Zeng, Jiyong Zou, Yu Xie, and Shengyong You. 2026. "A 1-Tetradecanol-1, 10-Decanediol Binary Eutectic Mixture/Expanded Graphite Composite Phase Change Materials for Thermal Energy Storage" Materials 19, no. 2: 371. https://doi.org/10.3390/ma19020371

APA Style

Yi, J., Hu, R., Zhan, G., Zeng, Q., Zou, J., Xie, Y., & You, S. (2026). A 1-Tetradecanol-1, 10-Decanediol Binary Eutectic Mixture/Expanded Graphite Composite Phase Change Materials for Thermal Energy Storage. Materials, 19(2), 371. https://doi.org/10.3390/ma19020371

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A 1-Tetradecanol-1, 10-Decanediol Binary Eutectic Mixture/Expanded Graphite Composite Phase Change Materials for Thermal Energy Storage

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