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首页> 外文期刊>RSC Advances >Highly porous carbons derived from MOFs for shape-stabilized phase change materials with high storage capacity and thermal conductivity
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Highly porous carbons derived from MOFs for shape-stabilized phase change materials with high storage capacity and thermal conductivity

机译：具有高存储容量和导热率的形状稳定相变材料的高度多孔碳源衍生自稳定的相变材料

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Highly porous carbons (HPCs) are successfully prepared using a controlled carbonization of metal organic frameworks (MOFs) method. New micropores and mesoporous channels are produced during the migration and aggregation of small ZnO particles in the carbon matrix, while larger nanocavities are created after the evaporation of ZnO particles. The HPCs with high surface area (up to 2551 m ~(2) g ~(?1) ) and large total pore volume (up to 3.05 cm ~(3) g ~(?1) ) have high adsorption of polyethylene glycol (PEG) (up to 92.5 wt%) for shape-stabilized phase change materials (ssPCMs). In the PEG@HPCs composites, the nanocavities with a large mesopore volume guarantee the high storage of PEG molecules, and the micropores and mesoporous channels induced surface tension and capillary force to ensure the high thermal stability of the composites. With a high content of PEG and good shape-stabilities, the PEG@HPCs show high phase change enthalpy, which is close to or even higher than that of pure PEG. The thermal conductivity of PEG can also be improved by HPCs.
机译：使用金属有机框架（MOFS）方法的受控碳化成功制备高度多孔的碳（HPC）。在碳基质中的小ZnO颗粒的迁移和聚集期间产生新的微孔和介孔通道，而在ZnO颗粒蒸发之后产生较大的纳米蜂窝。高表面积（高达2551m〜（2）G〜（α1））和总孔体积（高达3.05cm〜（3）g〜（β1））的HPC具有高吸附聚乙二醇（ PEG）（高达92.5wt％）用于形状稳定的相变材料（SSPCM）。在PEG @ HPCS复合材料中，具有大的中孔体积的纳米蜂窝体积保证PEG分子的高储存，以及微孔和介孔通道诱导表面张力和毛细管力，以确保复合材料的高热稳定性。具有高含量的PEG和良好的形状稳定性，PEG @ HPCS显示出高相变焓，其接近或甚至高于纯PEG。 PEG的导热率也可以通过HPC改善。

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