材料科学
氮化硼
气凝胶
热导率
复合材料
聚氨酯
复合数
保温
多孔性
热能储存
相(物质)
石蜡
相变材料
热的
蜡
图层(电子)
有机化学
化学
气象学
物理
生物
生态学
作者
Shibing Ren,Jiamin Yan,Min Li,Tao Zhang,Mei Yang,Ge Wang
标识
DOI:10.1016/j.ceramint.2022.11.049
摘要
Phase change materials (PCMs) applied in energy storage and temperature control system are important for energy conservation and environmental protection. In this work, structure-adjustable water-borne polyurethane (WPU)/boron nitride (BN) aerogels were synthesized via directional freeze-drying method, and used as supporting scaffolds to confine paraffin wax (PW) and obtain composite phase change materials. The three-dimensional (3D) porous thermal conductivity network of BN was derived by the in-situ ice crystal mound in aerogel, which endows the PW/WPU/BN composite PCM-2.5 with high thermal conductivity (0.96 W m−1 K−1) and high energy storage density (140.04 J/g). Shape-stabilized PCMs with high thermal conductivity and excellent electrical insulation prepared by the simple method have great potential for the thermal management of electronic products.
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