锚定策略诱导Ni-MOF@膨胀石墨复合材料的导电损耗以实现宽带微波吸收

冯仁威 范聪敏 兰笛 刘澜翔 何秦川 王益群

引用本文: 冯仁威, 范聪敏, 兰笛, 刘澜翔, 何秦川, 王益群. 锚定策略诱导Ni-MOF@膨胀石墨复合材料的导电损耗以实现宽带微波吸收[J]. 物理化学学报, 2026, 42(8): 100301. doi: 10.1016/j.actphy.2026.100301 shu
Citation:  Renwei Feng, Congmin Fan, Di Lan, Lanxiang Liu, Qinchuan He, Yiqun Wang. Anchoring strategy-induced conductive loss in Ni-MOF@expanded graphite composites to achieve broadband microwave absorption[J]. Acta Physico-Chimica Sinica, 2026, 42(8): 100301. doi: 10.1016/j.actphy.2026.100301 shu

锚定策略诱导Ni-MOF@膨胀石墨复合材料的导电损耗以实现宽带微波吸收

    通讯作者: congmin@mail.ustc.edu.cn (范聪敏); Email: wangyiqun17@cdut.edu.cn (王益群)
摘要: 金属有机框架(MOF)衍生物因其大比表面积和结构可调性,已成为电磁波吸收材料的候选者。然而,磁性MOF衍生物导电损耗不足及团聚问题严重制约了其应用。本文提出了一种新型导电网络构建工程与锚定策略,通过镍催化自组装及热处理工艺,设计出具有层状网格结构的Ni-MOF@碳纤维/膨胀石墨(EG)复合材料。具体而言,通过精确调控碳源与网格状EG,诱导游离碳构建了既可连接EG又能锚定MOF衍生物的导电网络。扫描电镜分析证实碳纤维连接EG层形成了更丰富的微导电网络。同时,碳纤维的锚定作用调控了阻抗匹配并激活界面诱导极化,电磁参数测试验证了该现象。因此,S-4样品的最小反射损耗(RLmin)达到−41.73 dB,最大有效吸收带宽(EABmax)为5.12 GHz,匹配厚度仅1.48 mm,雷达散射截面显著降低39.58 dB m2。该工作为高性能电磁波吸收材料的导电网络构建工程与锚定技术应用提供了重要启示。

English

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