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为了提高石蜡-膨胀石墨相变储能材料的热导率,以膨胀石墨压缩块(CEG)为基体,分别以低含量酚醛树脂浸渍和原位合成的方式制备高导热骨架,合成出膨胀石墨-树脂-石蜡相变储能材料。结果表明:原位聚合比浸渍可以获得更高热导率的膨胀石墨骨架,热导率由纯膨胀石墨压缩块的65.6 W·m~(-1)·K~(-1)达到68.9 W·m~(-1)·K~(-1)(105%),由其制备的储能材料热导率达到了膨胀石墨压缩块的106%(69.5 W·m~(-1)·K~(-1)),使储能材料热导率高于石蜡和膨胀石墨骨架,说明原位聚合可以强化膨胀石墨导热网络从而提高其热导率。
In order to improve the thermal conductivity of paraffin-expanded graphite phase-change energy storage materials, high-thermal conductive frameworks were prepared by impregnating and in-situ synthesis of low-content phenolic resin with expanded graphite compressed block (CEG) Resin - paraffin phase change energy storage materials. The results show that the in-situ polymerization can obtain the expanded graphite skeleton with higher thermal conductivity than that of the impregnated graphite. The thermal conductivity increases from 65.6 W · m -1 K -1 to 68.9 W · m -1 ~ (-1) · K ~ (-1) (105%). The thermal conductivity of the energy storage material prepared by the method has reached to 106% (69.5 W · m ~ (-1) · K ~ -1)), so that the thermal conductivity of the energy storage material is higher than that of the paraffin and expanded graphite skeleton, indicating that in-situ polymerization can enhance the thermal conductivity of the expanded graphite thermal conductivity network.