For the storage of latent thermal energy (LTES), phase change materials (PCM) are the most commonly used. Nonetheless, their low thermal conductivity values and the liquid leakage on the transition phase of process limits their application. Hence, the stabilization-form can be a solution to surmount these two limitations. In this work, the Hexadecane with large latent heat was used as PCM, styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) tri-block copolymer and the low-density polyethylene (LDPE) served as the supporting materials and expanded graphite (EG) was added for improving the thermal conductivity. We focused on the preparation of SEBS/ Hexadecane/ LDPE Composites and the improvement of the heat transfer using the EG. The Fourier Transformation Infrared spectroscope also demonstrated a good compatibility between SEBS, LDPE, Hexadecane, and EG. The transient Guarded Hot Plate Technique (TGHPT) and a Thermogravimetric analyzer were utilized to assess the thermal properties and thermal stability of the PCM composites respectively. Further, a leakage test proved that the composite has an excellent form-stable property. Thanks to expanded graphite, no hexadecane leakage was depicted at a 75% mass fraction of PCM in composites, which surmounts almost all mass fraction values reported in the literature.

对于潜在热能（LTES）的存储，最常用的是相变材料（PCM）。但是，它们的低热导率值和工艺过渡阶段的液体泄漏限制了它们的应用。因此，稳定形式可以是克服这两个限制的解决方案。在这项工作中，使用具有较大潜热的十六烷作为PCM，苯乙烯-b-（乙烯-共-丁烯）-b-苯乙烯（SEBS）三嵌段共聚物，低密度聚乙烯（LDPE）作为载体材料和膨胀石墨（EG）被添加以提高热导率。我们专注于SEBS /十六烷/ LDPE复合材料的制备以及使用EG改善传热的方法。傅里叶变换红外光谱仪还证明了SEBS，LDPE，十六烷，和EG。瞬态保护热板技术（TGHPT）和热重分析仪分别用于评估PCM复合材料的热性能和热稳定性。此外，泄漏试验证明该复合材料具有优异的形状稳定性。得益于膨胀石墨，在复合材料中PCM的质量分数为75％时，未发现十六烷泄漏，这几乎超过了文献中报道的所有质量分数值。