Abstract Composite phase change materials (CPCM) with improved thermal properties were fabricated by encapsulating stearic acid (SA) into high-density polyethylene (HDPE) with carbon fiber (CF). The HDPE acted as the supporting materials to prevent SA leakage. CF was introduced to enhance the thermal conductivity of the CPCM. Some characterization measurements were carried out to investigate the CPCM thermal properties. The patterns of Fourier transformation infrared spectroscopy (FT–IR) and X-ray diffractometry (XRD) revealed that the SA, HDPE and CF were combined physically, and the crystal structure of the mixture remained constant. The results of scanning electronic microscopy (SEM) indicated that the microstructure of the CPCM was relatively stable. The results of differential scanning calorimetry (DSC) indicated that the melting point and latent heat of CPCM6 were 68.48 °C and 140.17 kJ/kg, and the solidifying point and latent heat were 66.95 °C and 141.09 kJ/kg. Thermal gravimetric analysis (TGA) verified that the CPCM had an improved thermal stability within the working temperature range. The thermal conductivity of CPCM6 was 0.4043 W/m⋅K, which is 2.22 times greater than for SA. The addition of CF effectively enhanced the thermal conductivity of the SA. Overall, CPCM6 possesses the potential for application in heat storage fields.

中文翻译：

---

硬脂酸/高密度聚乙烯/碳纤维复合蓄热材料的热性能改善

摘要 通过将硬脂酸（SA）封装在碳纤维（CF）的高密度聚乙烯（HDPE）中，制备了具有改进热性能的复合相变材料（CPCM）。HDPE 充当支撑材料以防止 SA 泄漏。CF 被引入以提高 CPCM 的热导率。进行了一些表征测量以研究 CPCM 热性能。傅里叶变换红外光谱 (FT-IR) 和 X 射线衍射 (XRD) 的图案表明 SA、HDPE 和 CF 物理结合，混合物的晶体结构保持不变。扫描电子显微镜(SEM)结果表明CPCM的微观结构相对稳定。差示扫描量热法(DSC)结果表明，CPCM6的熔点和潜热分别为68.48℃和140.17 kJ/kg，凝固点和潜热分别为66.95℃和141.09 kJ/kg。热重分析 (TGA) 验证了 CPCM 在工作温度范围内具有改进的热稳定性。CPCM6 的热导率为 0.4043 W/m·K，是 SA 的 2.22 倍。CF的加入有效地提高了SA的热导率。总体而言，CPCM6 具有在蓄热领域的应用潜力。CPCM6 的热导率为 0.4043 W/m·K，是 SA 的 2.22 倍。CF的加入有效地提高了SA的热导率。总体而言，CPCM6 具有在蓄热领域的应用潜力。CPCM6 的热导率为 0.4043 W/m·K，是 SA 的 2.22 倍。CF的加入有效地提高了SA的热导率。总体而言，CPCM6 具有在蓄热领域的应用潜力。