Ultra-lightweight flexible foam carbonized melamine foam composite phase change material with high latent heat capacity and photothermal conversion capability

Professor Yibing Cai’s team at Jiangnan University has recently prepared a novel ultralight and flexible foam carbon-based composite phase change material, which is made by encapsulating n-eicosane into a carbon foam skeleton coated with titanium oxide nanoparticles.

Ti2O3 PDACF

The flexible carbon foam skeleton obtained by air stabilization and nitrogen carbonization of melamine foam has good porosity, which ensures the good mechanical properties and high mass ratio of the composite. In addition, the n-eicosane loading rate of up to 84%, as a thermal storage unit, ensures the high latent heat capacity and good temperature regulation performance of the composites. The melting/crystallization temperature and enthalpy of crystallization of the composites were 36.4/33.7°C and 200.1/200.6 kJ-kg-1, respectively. the carbon foam backbone modified by titanium oxide nanoparticles enhanced the leak-proof performance, photothermal conversion capability, thermal reliability and temperature regulation capability of the composite phase change materials. Therefore, the prepared composite phase change materials have broad application prospects in solar photothermal storage, waste heat recovery, infrared stealth, etc.

CF骨架的机械性能和SEM图像:(b)CF骨架(插入的光学照片显示其超轻特性);(c)不含Ti2O3 NPs的PDA@CF骨架(插入的图像显示其高倍放大)Ti2O3PDACF骨架;以及Ti2O3PDACF PCM84的相变复合材料。

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