3D network structural shape-stabilized composite PCMs for integrated enhancement of thermal conductivity and photothermal properties

IF 6.3 2区材料科学 Q2 ENERGY & FUELS

Solar Energy Materials and Solar Cells Pub Date : 2022-06-15 DOI:10.1016/j.solmat.2022.111645

Ting Yan , Z.H. Li , W.G. Pan

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引用次数: 9

Abstract

Metal organic frameworks (MOFs) are rarely used in the field of phase change heat storage, because their low thermal conductivity affects the practical application of composite phase change materials (PCMs). Three dimensional porous materials with good thermal conductivity and adsorption properties can be synthesized by cleverly combining high adsorption MOF with high thermal conductivity expanded graphite (EG). In this paper, ZIF-8 of zeolites with imidazole structure with high adsorption was prepared by method of co-precipitation. ZnO was prepared by carbonizing ZIF-8 in a vacuum tube furnace at 700°C. EG/CuS@ZnO was synthesized by compounding EG, the crosslinking agent polyvinylpyrrolidone (PVP) and photothermal materials (CuS). Finally, OC/EG/CuS@ZnO was prepared by stirring impregnation process according to four different proportions of octadecanol (OC) and compounding with EG/CuS@ZnO. The microstructure and thermal properties of the samples were characterized. The result shows that the enthalpy of composite phase change materials OC/EG/CuS@ZnO reaches 202.97 J/g, which greatly improves the adsorption performance of OC and improves the heat storage performance. The thermal conductivity test results show that the thermal conductivity of the composite PCMs with the ratio of ZnO to EG (1:8) is as high as about 11.77 W/(m·K). The results of photothermal experiments show that the composite PCM with CuS can improve its photothermal properties.

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三维网络结构形状稳定复合材料的综合增强导热性和光热性能

金属有机骨架(MOFs)由于导热系数低影响了复合相变材料(PCMs)的实际应用，在相变储热领域应用较少。将高吸附性MOF与高导热膨胀石墨巧妙结合，可以合成具有良好导热性能和吸附性能的三维多孔材料。采用共沉淀法制备了具有咪唑结构的高吸附性沸石ZIF-8。在700℃的真空管炉中对ZIF-8进行碳化制备ZnO。以EG、交联剂聚乙烯吡咯烷酮(PVP)和光热材料(cu)为原料合成EG/CuS@ZnO。最后，根据四种不同配比的十八醇(OC)，采用搅拌浸渍工艺，与EG/CuS@ZnO复配制备OC/EG/CuS@ZnO。对样品的显微组织和热性能进行了表征。结果表明，复合相变材料OC/EG/CuS@ZnO的焓达到202.97 J/g，大大提高了OC的吸附性能，提高了储热性能。热导率测试结果表明，ZnO与EG配比为1:8时，复合PCMs的热导率高达11.77 W/(m·K)左右。光热实验结果表明，添加cu的复合PCM可以改善其光热性能。

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.