Fan Zhixuan, Zhao Yunchao, Liu Xuying, Shi Yu, Jiang Dahua
Jiangxi Province Key Laboratory of Environmental Geotechnical Engineering and Hazards Control, Jiangxi University of Science and Technology Ganzhou 341000 Jiangxi Province China
RSC Adv. 2022 Apr 22;12(20):12303-12309. doi: 10.1039/d1ra09238c.
In this work, a myristic acid (MA)-paraffin wax (PW) binary eutectic phase change material (PCM) was prepared by a melt-solution blending method. The eutectic point of the MA-PW binary system was determined to be 62 wt% MA-38 wt% PW using a cooling curve. In addition, the phase transition properties and thermal stability of MA-PW binary eutectic PCM were investigated by differential scanning calorimetry (DSC) and thermogravimetry (TG) analysis. The melting temperature and latent heat as well as starting temperature of decomposition for MA-PW binary eutectic PCM were 41.99 °C, 171.43 J g and 137.86 °C, respectively. Besides, analysis of the chemical and crystal structures of MA, PW and MA-PW revealed no chemical reaction between MA and PW to produce a new molecular structure and no change in the crystal structure. Finally, MA-PW binary eutectic PCM still has good thermal properties and chemical stability after 500 cold-hot cycles.
在本工作中，采用熔融-溶液共混法制备了肉豆蔻酸（MA）-石蜡（PW）二元共晶相变材料（PCM）。利用冷却曲线确定MA-PW二元体系的共晶点为含62 wt% MA-38 wt% PW。此外，通过差示扫描量热法（DSC）和热重分析法（TG）研究了MA-PW二元共晶PCM的相变特性和热稳定性。MA-PW二元共晶PCM的熔化温度、潜热以及分解起始温度分别为41.99 °C、171.43 J g和137.86 °C。此外，对MA、PW和MA-PW的化学结构和晶体结构分析表明，MA与PW之间没有发生化学反应生成新的分子结构，晶体结构也没有变化。最后，MA-PW二元共晶PCM在经历500次冷热循环后仍具有良好的热性能和化学稳定性。
