本论文以金属有机骨架(IRMOF-3)为模板,在1000℃下与NaCl共混碳化制备出具有高比表面积和大孔体积的多孔碳材料,并作为载体负载硬脂酸,得到硬脂酸/多孔碳复合相变材料.通过扫描电镜、X射线衍射仪和能谱仪对多孔碳材料微观结构、物相组成及成分进行表征,氮气吸脱附曲线和孔径分布计算多孔碳材料的比表面积和孔体积,结合红外光谱和热重曲线分析复合相变材料的化学及热性能,最后由差示扫描量热法测得复合相变材料的潜热.热分析结果表明硬脂酸/多孔碳复合相变材料具有和硬脂酸相同的相变特性,多次热循环后复合相变材料的潜热无明显变化且不发生泄漏.%In this paper, the metal organic framework (IRMOF-3)chosen as carbon precursor and template was carbonized with NaCl at 1000°C to prepare porous carbon material with high specific surface area and large pore volume. Using stearic acid as the phase changing material for thermal energy storage and the porous carbon material as the support, the stearic acid/porous carbon composite phase changing material was obtained. The microstructure, phase composition and components of the porous carbon material were analyzed by scanning electron microscopy, X-ray diffraction, and energy dispersive spectrometer. Nitrogen adsorption-desorption curve and pore size distribution were observed to calculate the specific surface area and pore volume of the porous carbon material. The chemical and thermal properties of the composite material were analyzed by infrared spectroscopy and thermogravimetry. Finally, the latent heat of the composite phase changing material was investigated by differential scanning calorimetry. The thermal analysis results indicated that the material exhibited the same phase transition characteristics as the stearic acid, and no significant change of latent heat and leakage of the composite PCMs were observed after repeated cycling.
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