Rizvi Syed Muhammad Mujtaba, El Far Baha, Nayfeh Yousof, Shin Donghyun
School of Engineering & Technology, Central Michigan University Mount Pleasant MI 48859 USA
RSC Adv. 2020 Jun 16;10(39):22972-22982. doi: 10.1039/d0ra03666h.
In this study, the time-temperature dependency of heat capacity enhancement in molten salt nanofluids was studied experimentally. The result shows the heat capacity enhancement is directly related to the time-dependent synthesis process. Various samples of a binary salt mixture of LiCO-KCO doped with 1% AlO were prepared by heating and cooling at different rates (2, 4, 6, 8, and 10 °C min) along with the pure binary salt mixture. The samples were then tested for heat capacity using a differential scanning calorimeter. It was found that heat capacity enhancement in molten salt nanofluids depends on the heating and cooling rates during the synthesis. Recent studies have shown that the heat capacity enhancement observed could be due to the formation of dendritic structures. Transmission electron microscopy (TEM) and a pH variation method were employed to confirm the presence of dendritic nanostructures.
在本研究中，对熔盐纳米流体中热容增强的时间-温度依赖性进行了实验研究。结果表明，热容增强与时间相关的合成过程直接相关。通过以不同速率（2、4、6、8和10℃/分钟）加热和冷却，制备了掺杂1% AlO的LiCO-KCO二元盐混合物的各种样品以及纯二元盐混合物。然后使用差示扫描量热仪对样品的热容进行测试。发现熔盐纳米流体中的热容增强取决于合成过程中的加热和冷却速率。最近的研究表明，观察到的热容增强可能是由于树枝状结构的形成。采用透射电子显微镜（TEM）和pH变化法来确认树枝状纳米结构的存在。
