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Preparation of Fe3O4/ Lignin-based Carbon Nanofibers Composite and Its Microwave Absorption Performances
Received:January 07, 2020  
DOI：10.11980/j.issn.0254-508X.2020.05.001
Key Words:lignin  hollow  carbon nanofibers composite  microwave absorption
Fund Project:“纸质外卖包装推荐名录及创新产品孵化项目”征集通知
Author NameAffiliationPostcode
WANG Guiping State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou ,Guangdong Provence，510640 510640
AORI Gele State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou ,Guangdong Provence，510640 510640
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Abstract:In this study, lignin-based solid and hollow carbon nanofibers (CNFs and HCNFs) were prepared from bagasse acetic acid lignin. The resultant CNFs and HCNFs were oxidized by nitric acid and then blended with ferric acetylacetonate to synthesize Fe3O4/CNFs and Fe3O4/HCNFs composite via a solvothermal method. The structure changes of CNFs and HCNFs before and after nitric acid oxidation treatment were analyzed by Fourier transform infrared and Raman spectrometers. The differences in morphological structure, magnetic property and microwave absorption performance between Fe3O4/CNFs and Fe3O4/HCNFs were compared by Scanning electron microscope-energy dispersive spectrometer, X-ray diffractometer, specific surface and porosity analyzer, vibrating sample magnetometer and vector network analyzer. The results showed that both Fe3O4/CNFs and Fe3O4/HCNFs had the typical superparamagnetism with the saturation magnetization values of 12.7 emu/g and 16.5 emu/g, respectively. The microwave absorption properties of Fe3O4/HCNFs were better than that of Fe3O4/CNFs. The minimum reflection loss of Fe3O4/HCNFs was up to -11.8 dB with a thickness of only 1.5 mm, and the reflection loss values less than -10 dB were obtained in the frequency of 5.28~14.75 GHz with thickness of 1.0~2.5 mm.
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