| 高金轩,李可庆,段紫涵,宋梦元,陈曦.化学通报,2025,88(12):1317-1324. |
| 金属有机凝胶基复合相变材料的制备与性能研究 |
| Preparation and Performance Study of Metal-Organic Gel-Based Composite Phase Change Materials |
| 投稿时间：2025-07-13 修订日期：2025-08-05 |
| DOI： |
| 中文关键词: 金属有机凝胶 硬脂酸 复合材料 相变储能 |
| 英文关键词:Metal-organic gels, Stearic acid, Composite material, Phase change energy storage |
| 基金项目:江西省自然科学基金项目(20224BAB213029,20232BAB203036)资助 |
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| 中文摘要: |
| 有机固-液相变材料作为潜热储能技术的重要工作介质，在使用过程中常存在液相泄漏的问题，现阶段常将此类相变材料与多孔载体复合以提升相变材料的应用性能及使用寿命。金属有机凝胶（MOG）是一种新型多孔材料，具有优异稳定性、丰富活性位点、分级多孔结构和多种响应特性等优势，将其用作相变材料的载体具有潜在的发展前景。有鉴于此，本工作基于Fe3+和1,3,5-苯三甲酸合成了一种有机-无机杂化多孔金属-有机凝胶，并负载硬脂酸（18COOH）制备复合相变材料。比表面积及孔径分析（BET）、差示扫描量热分析（DSC）、热失重分析（TGA）及高温泄露测试等结果表明，MOG作为多孔载体负载相变材料具有极大潜能，其主要通过其良好的孔隙度、柔韧性及其丰富的活性位点等与18COOH相互作用，和传统的金属有机骨架材料MIL-100（MOF)相比，总体上提高了复合相变材料的相变潜热利用，MOG/18COOH复合材料的熔融焓值可以达到77.7 J/g。所得MOG/18COOH复合材料在经过一系列循环热的测试后依然保持良好的稳定性，没有从MOG中观察到PCMs的泄漏，这也进一步验证了负载后的元复合相变材料可长期使用，并且拥有良好的热物性能。 |
| 英文摘要: |
| Organic solid-liquid phase change materials, as the important working media in latent heat storage technology, often encounter the problem of liquid phase leakage during use. At present, they are often combined with porous carriers to enhance the application performance and service life. Metal-organic gel (MOG) are a new type of porous material, featuring excellent stability, abundant active sites, hierarchical porous structure and various response characteristics, they would have potential development prospects as porous carriers for phase change materials. In light of this, in this work, an organic-inorganic hybrid porous metal-organic gel was synthesized based on Fe3+ and 1,3, 5-phenyltrimethylbenzene, and stearic acid (18COOH) was loaded to prepare composite phase change materials. The results of specific surface area and pore size analysis (BET), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and high-temperature leakage tests, indicate that MOG has great potential as a porous carrier loaded phase change material. It mainly interacts with 18COOH through its excellent porosity, flexibility, and abundant active sites. Compared with the traditional metal-organic framework material MIL-100 (MOF), the overall utilization of latent heat of phase change of composite phase change materials has been improved. The melting enthalpy value of the MOG/18COOH composite material can reach 77.7 J/g. The obtained MOG/18COOH composite material can maintain good stability after a series of cyclic thermal tests, and no leakage of 18COOH was observed in the MOG. This further verified that the composite phase change material can be used for a long time and has good thermal physical properties. |
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