Abstract A fluffy ultrathin-wall mesoporous surface carbon foam (UMSCF) with high thermal conductivity was prepared via carbon-thermal reduction reaction between a carbon foam and aluminium nitrate, and then used as a supporting material for stearic acid (SA) to form shape-stabilized composite phase change materials (PCMs). The UMSCF and the as-prepared SA/UMSCF composite PCMs were characterized by SEM, TEM, XRD, Raman, BET, FTIR, wettability test, compression test, TG, DSC, thermal cycling test and laser flash method, respectively. Results shows that the carbon-thermal reduction temperature greatly influences the microstructures of the UMSCF, and the UMSCF prepared at 1600 °C (UMSCF-1600) possesses good lipophilicity, high thermal conductivity and superior mechanical properties. The prepared UMSCF as supporting matrix simultaneously improves thermal conductivity and shape-stabilization of PCMs, as well as retains relative high phase change enthalpy. The melting and freezing enthalpy for SA/UMSCF-1600 composite was measured as 149.3 and 151.2 J/g, respectively. The thermal conductivity of the composite PCMs is as high as 1.725 W/m K, which increases by about 6.791-fold compared with pristine SA. Meanwhile, the composites display good thermal reliability and chemical stability, suggesting their promising characteristics for thermal management applications.

中文翻译：

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超薄壁介孔表面碳泡沫稳定硬脂酸作为热能储存的理想相变材料

摘要 通过碳泡沫与硝酸铝之间的碳-热还原反应制备了具有高导热性的蓬松超薄壁介孔表面碳泡沫（UMSCF），然后作为硬脂酸（SA）的载体形成形状-稳定的复合相变材料 (PCM)。分别通过SEM、TEM、XRD、拉曼、BET、FTIR、润湿性测试、压缩测试、TG、DSC、热循环测试和激光闪光法对UMSCF和制备的SA/UMSCF复合相变材料进行了表征。结果表明，碳热还原温度对 UMSCF 的微观结构有很大影响，在 1600 °C 制备的 UMSCF（UMSCF-1600）具有良好的亲油性、高导热性和优异的机械性能。制备的 UMSCF 作为支撑基质同时提高了 PCM 的导热性和形状稳定性，并保持了相对较高的相变焓。SA/UMSCF-1600 复合材料的熔化和冷冻焓分别测量为 149.3 和 151.2 J/g。复合 PCM 的热导率高达 1.725 W/m K，与原始 SA 相比增加了约 6.791 倍。同时，复合材料显示出良好的热可靠性和化学稳定性，表明它们在热管理应用中具有良好的特性。复合 PCM 的热导率高达 1.725 W/m K，与原始 SA 相比增加了约 6.791 倍。同时，复合材料显示出良好的热可靠性和化学稳定性，表明它们在热管理应用中具有良好的特性。复合 PCM 的热导率高达 1.725 W/m K，与原始 SA 相比增加了约 6.791 倍。同时，复合材料显示出良好的热可靠性和化学稳定性，表明它们在热管理应用中具有良好的特性。