Feng Ailing, Ma Mingliang, Jia Zirui, Zhang Meng, Wu Guanglei
Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences Baoji 721016 P. R. China.
Research Institute of Functional Materials, School of Civil Engineering, Qingdao University of Technology Qingdao 266033 P. R. China.
RSC Adv. 2019 Aug 19;9(44):25932-25941. doi: 10.1039/c9ra04219a. eCollection 2019 Aug 13.
In this work, a novel CF@NiFeO composite coated with phytic acid-doped polyaniline (CF@NiFeO@p-PANI) was facilely synthesized. First, a typical solvothermal reaction was applied to obtain the CF@NiFeO composite, and then the phytic acid-doped polyaniline was grown on the surface of the CF@NiFeO composite. The morphological structure, chemical composition, and surface functional group distribution of this hybrid were systematically evaluated. The magnetic saturation ( ) value of the hybrid is 29.9 emu g, which represents an improvement in the magnetic loss. According to its reflection loss curve, the hybrid exhibits a superior EM wave absorption capacity, with a minimum reflection loss value and effective absorbing bandwidth of -46 dB when the sample thickness is 2.9 mm, and an effective absorption bandwidth of 5 GHz when the sample thickness is 1.5 mm. The excellent performance of this hybrid can mainly be attributed to its ideal matching of magnetic loss and dielectric loss, interfacial polarizations, eddy current loss and interface relaxation. This new material has the potential to be a superior electromagnetic wave absorber or applied as a functional filler to modify resin matrices.
在这项工作中，一种新型的包覆有植酸掺杂聚苯胺的CF@NiFeO复合材料（CF@NiFeO@p-PANI）被简便地合成出来。首先，通过典型的溶剂热反应获得CF@NiFeO复合材料，然后在CF@NiFeO复合材料表面生长植酸掺杂的聚苯胺。对这种杂化材料的形态结构、化学成分和表面官能团分布进行了系统评估。该杂化材料的磁饱和（ ）值为29.9 emu g，这表明磁损耗有所改善。根据其反射损耗曲线，该杂化材料表现出优异的电磁波吸收能力，当样品厚度为2.9 mm时，最小反射损耗值为-46 dB，有效吸收带宽，当样品厚度为1.5 mm时，有效吸收带宽为5 GHz。这种杂化材料的优异性能主要归因于其磁损耗和介电损耗的理想匹配、界面极化、涡流损耗和界面弛豫。这种新材料有潜力成为一种优异的电磁波吸收剂或用作功能性填料来改性树脂基体。
