Synthesis of core-shell Fe3O4@ppy/graphite nanosheets composites with enhanced microwave absorption performance
Synthesis of core-shell Fe3O4@ppy/graphite nanosheets composites with enhanced microwave absorption performance
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具有增强微波吸收性能的核壳Fe3O4@ppy/石墨纳米片复合材料的合成
DOI：
10.1016/j.matlet.2018.12.001
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发表时间：
2019
影响因子：
3
通讯作者：
Shao Chengrui
中科院分区：
文献类型：
--
作者：
Su Xiaogang;Wang Jun;Zhang Xiaoxiao;Zhang Bin;Wu Qilei;Dai Wei;Zou Yi;Shao Chengrui
为了解决电磁波的辐射和干扰现象，人们越来越多地研究具有强吸收和宽带的高性能微波吸收材料。本文采用简易工艺制备了一种新型的石墨纳米片/核壳Fe3O4@ppy杂化材料(GNFP)。以Fe3O4纳米球为化学模板剂，在吡咯单体聚合反应中形成核壳结构的Fe3O4@ppy(FP)，再用3-氨基丙基三乙氧基硅烷(KH-550)将Fe3O4@ppy(FP)放置在处理后的石墨纳米片(GNS)表面。由于具有良好的阻抗匹配、协同效应和多次反射效应，在−10 GHz以下的带宽为4.0 8 GHz(12.47~16.55 GHz)，膜厚为1.5 mm，在9.92 GHz处的最大反射率为49.3 分贝。因此，GNFP复合材料可以被认为是一种很有前途的微波吸收材料。
To solve the phenomenon of electromagnetic wave radiation and interference, the high-performance microwave absorption materials with strong absorption and wide bandwidth are studied increasingly. Herein, a novel microwave absorption material of graphite nanosheets/core–shell Fe3O4@ppy hybrids (GNFP) is fabricated by facile processes. Fe3O4nanospheres as chemical template start in the polymerization of pyrrole monomer to form the core–shell Fe3O4@ppy (FP) further placed on the surface of the treated graphite nanosheets (GNS) by 3-aminopropyltriethoxysilane (KH-550). The maximum reflectivity of GNFP hybrids is −49.3 dB at 9.92 GHz, and the bandwidth below −10 dB is 4.08 GHz (12.47–16.55 GHz) with layer thickness of 1.5 mm, which is due to great impedance matching, synergistic effect and multiple reflections. Thus, GNFP composites could be considered as a promising microwave absorber.