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首页> 外文期刊>RSC Advances >In situ formation of Fe3O4/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property
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In situ formation of Fe3O4/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property

机译：原位形成Fe3O4 / n掺杂碳涂层的碳纤维表面，具有改进的电磁波吸收性能

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Carbon fiber is an absorbing material with high strength, acid and alkali resistance, high temperature resistance, flexibility, and processability and plays an important role in the electromagnetic (EM) wave absorption of civil buildings and military equipment. However, its EM wave-absorption performance is poor because of its large complex permittivity and no magnetic loss ability. In this study, dopamine hydrochloride and FeCl _(3) were used as precursors, and the Fe _(3) O _(4) /N-doped carbon coating was successfully grown in situ on the surface of short carbon fiber (SCF) via dopamine deposition, autopolymerization, FeCl _(3) solution immersion, and calcination at high temperature to improve its EM wave-absorption property. The obtained Fe _(3) O _(4) /N-doped carbon particles were uniformly attached to the SCF in the form of a thin layer to constitute a unique hierarchical structure. The Fe _(3) O _(4) /N-doped carbon coating/SCF displayed an excellent EM wave-absorption performance. An effective bandwidth of 8.64 GHz and lowest reflection loss of ?31.38 dB at 3 mm were achieved because of the significant reduction in complex permittivity and improvement in complex permeability, wave impedance, and EM loss ability of the SCF. The Fe _(3) O _(4) /N-doped carbon coating is expected to show great potential in EM wave-absorption fields.
机译：碳纤维是具有高强度，酸和耐碱性，高耐温性，柔韧性和加工性的吸收材料，在民用建筑和军事装备的电磁（EM）波吸收中起着重要作用。然而，由于其具有较大的复杂介电常数和磁力损失能力，其EM波吸收性能差。在该研究中，使用多巴胺盐酸盐和FECL _（3）作为前体，并且Fe _（3）O _（4）/ n掺杂的碳涂层在短碳纤维表面（SCF）的表面上成功生长通过多巴胺沉积，自聚合，FECL _（3）溶液浸渍，并在高温下煅烧以改善其EM波吸收性能。所得Fe _（3）o _（4）/ n掺杂的碳颗粒以薄层的形式均匀地附着在SCF上以构成独特的层级结构。 Fe _（3）O _（4）/ n掺杂的碳涂层/ SCF显示出优异的EM波吸收性能。实现了8.64GHz的有效带宽和3mm的最低反射损耗，由于复杂介电常数显着降低和SCF的复杂渗透率，波阻抗和EM损耗能力的显着降低，因此实现了3mm。预计Fe _（3）o _（4）/ n掺杂的碳涂层将在EM波动吸收领域表现出极大的潜力。

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