Wu Shibin, Chen Yan, Chen Zhenshou, Wang Jiaqi, Cai Miaomiao, Gao Junkai
School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, 316022, China.
Sci Rep. 2021 Jan 12;11(1):822. doi: 10.1038/s41598-021-80964-8.
Metal microspheres doping porous carbon (MMPC), which was prepared using in-situ pyrolysis reduction strategy, could enhance the thermal conductivity of shape-stabilized phase change material (ss-PCM) prepared by MMPC as the matrix. However, in previous studies that were reported, the preparation of MMPC needed to synthesize porous carbon by pyrolysis firstly, and then porous carbon adsorbed metal ions was pyrolyzed again to obtain MMPC, which was tedious and energy-prodigal. In this study, a one-step pyrolysis strategy was developed for the synthesis of MMPC through the pyrolyzation of wheat bran adsorbed copper ions, and the copper microspheres doping wheat bran biochar (CMS-WBB) was prepared. The CMS-WBB was taken as the supporter of stearic acid (SA) to synthesize the ss-PCM of SA/CMS-WBB. The study results about the thermal properties of SA/CMS-WBB demonstrated that the introduction of copper microspheres could not only improve the thermal conductivity of SA/CMS-WBB, but also could increase the SA loading amount of wheat bran biochar. More importantly, the CMS-WBB could be obtained by only one-step pyrolysis, which greatly simplified the preparation process and saved energy consumption. Furthermore, the raw material of wheat bran is a kind of agricultural waste, which is abundant, cheap and easy to obtain. Hence, the SA/CMS-WBB synthesized in this study had huge potentialities in thermal management applications, and a simplified method for improving the thermal properties of ss-PCMs was provided.
采用原位热解还原策略制备的金属微球掺杂多孔碳（MMPC），可以提高以MMPC为基体所制备的形状稳定相变材料（ss-PCM）的热导率。然而，在以往报道的研究中，MMPC的制备需要先通过热解合成多孔碳，然后将吸附金属离子的多孔碳再次热解以获得MMPC，这一过程繁琐且耗能。在本研究中，通过对吸附铜离子的麦麸进行热解，开发了一种一步热解策略来合成MMPC，并制备了铜微球掺杂麦麸生物炭（CMS-WBB）。以CMS-WBB作为硬脂酸（SA）的载体，合成了SA/CMS-WBB的ss-PCM。关于SA/CMS-WBB热性能的研究结果表明，铜微球的引入不仅可以提高SA/CMS-WBB的热导率，还可以增加麦麸生物炭的SA负载量。更重要的是，只需一步热解即可获得CMS-WBB，这大大简化了制备过程并节省了能源消耗。此外，麦麸原料是一种农业废弃物，来源丰富、价格低廉且易于获取。因此，本研究中合成的SA/CMS-WBB在热管理应用中具有巨大潜力，并提供了一种改善ss-PCMs热性能的简化方法。
