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- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received August 25, 2024
Accepted February 7, 2025
Available online April 25, 2025
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Experimental Study of Shape-Stabilized Phase Change Materials Based on High-Density Polyethylene and Expanded Graphite
https://doi.org/10.1007/s11814-025-00427-y
Abstract
Low-temperature latent heat storage based on solid–liquid phase change materials (PCMs) is an eff ective energy saving technology.
However, the problems of low thermal conductivity and liquid leakage exist, so eff ective encapsulation and enhanced
heat transfer are the focus of current research. In this study, paraffi n RT58 was selected as PCM and HDPE were selected as
encapsulation materials. Three PCM/HDPE composites with diff erent proportions were prepared by melt-blending method
and their encapsulation eff ect was tested. According to the results, 80wt%paraffi n/20wt%HDPE composite was used for the
subsequent experiments. EG was used to construct a heat-conducting skeleton inside the composite. The eff ects of EG content
on thermal properties, density, leakage rate, and heat storage/release rate of the composites were investigated. The results
show that the melting temperature and solidifi cation temperature of the composites decrease with the increase of EG content.
Furthermore, the addition of EG greatly reduces the leakage of composite by at least 2/3. The heat storage and release rate of
the composite is accelerated with the increase of EG. The content of EG should be optimized by comprehensively considering
its eff ects on the heat storage/release rate, heat storage density, bulk density, and encapsulation eff ect of the composite.
