Three-dimensional hierarchical graphene (3DHG) was compounded with stearic acid (SA) to obtain SA/3DHG composite phase change materials (PCMs). The specific surface area and pore volume of 3DHG are 393 m 2 g −1 and 0.57 m 3 g −1 . The phase-transition temperatures of SA/3DHG composites keep at 69 ± 1 °C with different adding amounts of 3DHG, meanwhile SA/3DHG-3 possesses the melting enthalpy of 189.7 J·g −1 and solidifying enthalpy of 188.8 J·g −1 . 3DHG shows significant enhancement on the thermal properties and shape stability of SA. The thermal conductivity of SA/3DHG-3 reaches to 0.93 W·m −1 ·K −1 , which is as high as 2.8 times of pure SA (0.33 W·m −1 ·K −1 ). The investigations of XRD and FTIR indicate that no chemical but physical combination occurs between SA and graphene. 3DHG has substantial meso-porous/macro-porous structure for packaging SA to form the irregular core–shell s...

中文翻译：

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制备三维分层石墨烯/硬脂酸作为相变材料用于储热

将三维分层石墨烯（3DHG）与硬脂酸（SA）混合以获得SA / 3DHG复合相变材料（PCM）。3DHG的比表面积和孔体积为393m 2 g -1和0.57m 3 g -1。不同添加量的3DHG，SA / 3DHG复合材料的相变温度保持在69±1°C，而SA / 3DHG-3的熔融焓为189.7 J·g -1，凝固焓为188.8 J·g- 1。3DHG显着增强了SA的热性能和形状稳定性。SA / 3DHG-3的热导率达到0.93 W·m -1·K -1，是纯SA（0.33 W·m -1·K -1）的2.8倍。XRD和FTIR的研究表明SA和石墨烯之间没有化学结合而是物理结合。