Abstract In this paper, composite phase change materials (cPCMs) were prepared by the impregnation method with poly(methyl vinyl ether-alt-maleic anhydride)-g-octadecanol (PM18) comb-like polymer as PCMs and reduced graphene oxide-carbon nanotubes hybrid aerogel (CG-x) that x (the mass ratio between CNT and GO) varies from 0.5 to 2 as supporting matrix. Thermal properties such as phase change enthalpy, thermal repeatability and shape stabilization of cPCMs were investigated by FTIR, DSC, and thermocouple. PM18@CG-x cPCMs exhibit an enhanced shape-stabilization behavior at 80 °C for 30 min and a 300% increased thermal conductivity is realized. PM18@CG-1 cPCMs demonstrate an excellent light-to-thermal conversion capacity and a good thermal energy storage and release ability, and its largest temperature appears at 75.4 °C under 100 mW/cm2 irradiation intensity. Furthermore, the light-to-thermal conversion capability of fabric controlled by the back-bonded PM18@CG-1 slice is investigated, and the influence of irradiation intensity on thermal energy buffering time is also discussed. Through controlling the number of PM18@CG-1 slices, the tailored thermal properties are further analyzed. This method provides a method to approach the shape-stabilized PCMs with good thermal management and photothermal conversion capability.

中文翻译：

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用于热管理应用的梳状聚合物复合相变材料的形状稳定和光热转换性能

摘要 本文以聚（甲基乙烯基醚-alt-马来酸酐）-g-十八醇（PM18）梳状聚合物为PCMs，还原氧化石墨烯-碳纳米管，采用浸渍法制备复合相变材料（cPCMs）。混合气凝胶 (CG-x)，其中 x（CNT 和 GO 之间的质量比）从 0.5 到 2 不等，作为支撑基质。通过 FTIR、DSC 和热电偶研究了 cPCM 的热性能，如相变焓、热重复性和形状稳定性。PM18@CG-x cPCM 在 80°C 下保持 30 分钟时表现出增强的形状稳定行为，并且实现了 300% 的热导率增加。PM18@CG-1 cPCMs表现出优异的光热转换能力和良好的热能储存和释放能力，其最大温度出现在75℃。在 100 mW/cm2 辐照强度下 4 °C。此外，研究了由背粘合 PM18@CG-1 切片控制的织物的光热转换能力，并讨论了辐照强度对热能缓冲时间的影响。通过控制 PM18@CG-1 切片的数量，进一步分析了定制的热性能。该方法提供了一种接近具有良好热管理和光热转换能力的形状稳定的 PCM 的方法。