Xiong Shenghua, Shi Yanlong, Liu Changhui, Yang Yunyun
College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China Guanghan 618307 China
Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province, Civil Aviation Flight University of China Guanghan 618307 China.
RSC Adv. 2025 May 21;15(21):17023-17030. doi: 10.1039/d5ra01422k. eCollection 2025 May 15.
In this study, CNT-BN-SA-1 composites were prepared by vacuum impregnation using stearic acid (SA) as a phase change material (PCM), multi-walled carbon nanotubes (CNT) and hexagonal boron nitride (BN) as support materials. According to the results of the thermal conductivity of CNT-BN-SA-1, the maximum thermal conductivity of CNT-BN-SA-1 is 0.83 W m K when the CNT-BN content reaches 15 wt%. The surface morphology, heat storage capacity, and reliability of CNT-BN-SA-1 were systematically studied. The melting temperature (Δ ) of CNT-BN-SA-1 is 51.83 °C and the latent calorific value is 143.5 ± 5.0 J g. CNT-BN-SA-1 still exhibits good latent heat capacity after 1000 heat treatment cycles, and its latent heat after cycling is 147.3 ± 5.0 J g. After a high temperature of 100 °C, CNT-BN-SA-1 still retains a good solid shape. The results show that CNT-BN-SA-1 has high latent heat, reliability, and excellent CSP energy storage capabilities. It has great application potential in the field of FSPCMs. This method provides a certain reference for the preparation of phase change composites.
在本研究中，以硬脂酸（SA）作为相变材料（PCM），多壁碳纳米管（CNT）和六方氮化硼（BN）作为支撑材料，通过真空浸渍法制备了CNT-BN-SA-1复合材料。根据CNT-BN-SA-1的热导率结果，当CNT-BN含量达到15 wt%时，CNT-BN-SA-1的最大热导率为0.83 W m K。系统研究了CNT-BN-SA-1的表面形貌、储热能力和可靠性。CNT-BN-SA-1的熔化温度（Δ ）为51.83 °C，潜热值为143.5±5.0 J g。经过1000次热处理循环后，CNT-BN-SA-1仍表现出良好的潜热容量，循环后的潜热为147.3±5.0 J g。在100 °C的高温后，CNT-BN-SA-1仍保持良好的固态形状。结果表明，CNT-BN-SA-1具有高潜热、可靠性和优异的聚光太阳能热发电储能能力。它在脂肪酸基相变材料领域具有很大的应用潜力。该方法为相变复合材料的制备提供了一定的参考。
