Ye Wei, Sun Qilong, Long Xiaoyun, Cai Yingying
National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, Nantong University Nantong 226019 P. R. China
College of Textiles and Clothing, Nantong University Nantong 226019 P. R. China.
RSC Adv. 2020 Mar 17;10(19):11121-11131. doi: 10.1039/d0ra00785d. eCollection 2020 Mar 16.
A three-layered electromagnetic (EM) wave-absorbing material was prepared by depositing a FeO and boron nitride (BN) coating onto the surface of a carbon fiber (CF) by hybridization. The structure, chemical composition, morphology, high-temperature resistance, EM characteristics and EM wave absorption of the composite materials were analyzed. The composite materials contained CFs, and FeO was distributed along the axial direction of the fiber, whereas BN was found in the outermost coating layer. The proposed preparation method improved the oxidation resistance and EM wave absorption of CF. When the solubility of the metal salt was 20 g/100 ml, the decomposition temperature of the prepared CF/FeO(3)/BN increased by more than 200 °C compared with that of CF/FeO(3). The EM wave loss of less than -5 dB ranged within 8.8-18 GHz, and the effective EM wave-absorbing bandwidth ( < -10 dB) was 4.2 GHz (11.2-15.4 GHz). The prepared CF-based composite material had a lightweight structure, wide absorption band, and strong oxidation resistance. All these findings can serve as a reference for the study of other EM wave-absorbing materials.
通过杂化在碳纤维（CF）表面沉积FeO和氮化硼（BN）涂层，制备了一种三层电磁（EM）波吸收材料。对复合材料的结构、化学成分、形貌、耐高温性、EM特性和EM波吸收进行了分析。复合材料包含CF，FeO沿纤维轴向分布，而BN位于最外层涂层中。所提出的制备方法提高了CF的抗氧化性和EM波吸收能力。当金属盐的溶解度为20 g/100 ml时，制备的CF/FeO(3)/BN的分解温度比CF/FeO(3)提高了200℃以上。EM波损耗小于-5 dB的范围在8.8-18 GHz内，有效EM波吸收带宽（<-10 dB）为4.2 GHz（11.2-15.4 GHz）。制备的CF基复合材料具有轻质结构、宽吸收带和强抗氧化性。所有这些发现可为其他EM波吸收材料的研究提供参考。
