Co/C微波吸收性能及Co/C-聚氨酯相变复合材料的微波-热转换性能

摘要/Abstract

摘要： 通过热解金属有机骨架ZIF-67的方法成功制备了具有优异微波吸收性能的Co/C碳基复合材料。在600 ℃热解温度下获得的吸收剂质量分数为35% 的样品,最小反射损耗可达到-54.30 dB,其厚度仅为1.75 mm。通过分析样品的损耗能力和阻抗匹配等微波吸收特性,发现复合材料中的骨架结构等对其阻抗匹配性能有非常大的影响。并通过原位复合的方法制备了分散均匀的Co/C-PU相变复合材料,初步研究了其微波-热转换性能。实验表明,微波吸收剂的添加量对其微波-热转换性能影响显著,发热效率随添加量成倍升高。本文研究的Co/C-PU相变复合材料在电磁屏蔽、雷达红外兼容隐身等方面具有很大的应用潜力。此外,固固相变材料结合微波热效应的快速高效等特点,用于储能或者其他热应用也有独特的优势。

关键词: 吸波材料, 固固相变材料, 金属有机骨架, 聚氨酯, 微波-热转换

Abstract: In this paper, a Co/C carbon-based composite material with excellent microwave absorption properties was successfully prepared by pyrolyzing metal-organic framework ZIF-67. The sample with a mass fraction of 35% of absorbent obtained at a pyrolysis temperature of 600 ℃ has a minimum reflection loss of -54.30 dB and its thickness is only 1.75 mm. By analyzing the microwave absorption characteristics of the sample′s loss capability and impedance matching, it is found that the skeleton structure in the composite material has a great influence on its impedance matching performance. And the uniformly dispersed Co/C-polyurethane (PU) phase change composite material was prepared by in-situ composite method, and its microwave-thermal conversion performance was preliminarily studied. The amount of added microwave absorbent has a significant effect on its microwave-heat conversion performance, and the heating efficiency increases exponentially with the added amount. The Co/C-PU phase change composite material studied in this paper has great application potential in electromagnetic shielding, radar and infrared compatible stealth. In addition, solid-solid phase change materials combined with the rapid and high-efficiency characteristics of microwave heating effects have unique advantages when used for energy storage or other thermal applications.

Key words: Microwave absorption materials, Phase change materials, Metal-organic frameworks, Polyurethane, Microwave-heat transportation

中图分类号:

O642

吴秋萍, 蔡昆廷, 王元康, 孙凯, 杨金波, 韩松柏, 刘蕴韬. Co/C微波吸收性能及Co/C-聚氨酯相变复合材料的微波-热转换性能[J]. 应用化学, 2021, 38(12): 0-0.

WU Qiu-Ping, CAI Kun-Ting, WANG Yuan-Kang, SUN Kai, YANG Jin-Bo, HAN Song-Bai, LIU Yun-Tao. Microwave Absorption Properties of Co/C and Microwave-Heat Conversion Properties of Co/C-Polyurethane Phase Change Composites[J]. Chinese Journal of Applied Chemistry, 2021, 38(12): 0-0.

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