用于热能储存的酚醛树脂原位铜负载空心多孔碳纳米球

IF 3.1 2区 化学 Q2 CHEMISTRY, ANALYTICAL Thermochimica Acta Pub Date : 2024-04-12 DOI:10.1016/j.tca.2024.179746
Jiahui Wu , Lei Shi , Jie Liu , Yali Luo , Yunfei Liu , Yinong Lyu
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引用次数: 0

摘要

中空多孔碳纳米球(HPCS)是热能储存领域相变材料的理想支架。然而,它们的合成传统上依赖于基于模板的路线,涉及繁琐的程序和高昂的成本。本研究采用 CuCl2 作为活化剂,通过一步碳化酚醛树脂,提出了一种制备 HPCS 的简便方法。这种温和的活化剂不仅有助于形成丰富的多孔结构,还能保持聚合物前体的中空球形结构。更重要的是,铜离子在碳化过程中被还原成纳米铜粒子,并被原位载入多孔碳中,从而增强了支架的导热性。在加入石蜡后,得到的复合材料显示出 104.4 J g-1 的高相变焓、0.95 W m-1 K-1 的改进热导率和出色的热循环稳定性(50 次加热-冷却循环后为 100.5 J g-1),这表明其在热能存储和管理方面具有巨大潜力。
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In-situ copper-loaded hollow porous carbon nanospheres derived from phenolic resin for thermal energy storage

Hollow porous carbon nanospheres (HPCS) are ideal scaffolds for phase change materials in thermal energy storage. However, their synthesis traditionally relies on template-based routes, involving tedious procedures and high costs. This study presents a facile method for preparing HPCS through one-step carbonization of phenolic resin using CuCl2 as the activation agent. This mild activation agent not only helps create a rich porous structure, but also maintains the hollow spherical architecture of the polymer precursor. More importantly, copper ions are reduced to copper nanoparticles during the carbonization process and are in-situ loaded into porous carbon, enhancing the thermal conductivity of the scaffold. After incorporating paraffin, the resulting composite exhibits a high phase change enthalpy of 104.4 J g−1, improved thermal conductivity of 0.95 W m−1 K−1, and excellent thermal cycling stability (100.5 J g−1 after 50 heating-cooling cycles), indicating significant potential for thermal energy storage and management.

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来源期刊
Thermochimica Acta
Thermochimica Acta 化学-分析化学
CiteScore
6.50
自引率
8.60%
发文量
210
审稿时长
40 days
期刊介绍: Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes
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