| TANG Jin,LIN Bin,WANG Yong,HOU Gen-liang,LIU Chao-hui,LI Hao,LIN Yang-yang,BI Song.Preparation and Microwave Absorption Properties of Lightweight CB/RGO Composite Coating[J],49(2):100-108 |
| Preparation and Microwave Absorption Properties of Lightweight CB/RGO Composite Coating |
| Received:August 31, 2019 Revised:February 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.02.013 |
| KeyWord:liquid phase method in-situ growth CB/RGO composite absorbent lightweight and flexible microwave absorption properties |
| Author | Institution |
| TANG Jin |
1.304 Teaching and Research Section, Rocket Force University of Engineering, Xi’an , China |
| LIN Bin |
2.First Military Representative Office of Rocket Force Equipment Department in Wuhan, Wuhan , China |
| WANG Yong |
3.Military Representative Office of Rocket Force Equipment Department in Taian, Taian , China |
| HOU Gen-liang |
1.304 Teaching and Research Section, Rocket Force University of Engineering, Xi’an , China |
| LIU Chao-hui |
1.304 Teaching and Research Section, Rocket Force University of Engineering, Xi’an , China |
| LI Hao |
1.304 Teaching and Research Section, Rocket Force University of Engineering, Xi’an , China |
| LIN Yang-yang |
1.304 Teaching and Research Section, Rocket Force University of Engineering, Xi’an , China |
| BI Song |
1.304 Teaching and Research Section, Rocket Force University of Engineering, Xi’an , China |
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| Abstract: |
| The work aims to prepare the CB/RGO composite coating with excellent microwave absorbing properties. Reduced graphene oxide (RGO) was in-situ grown into the conductive carbon black (CB) system for synthesizing the CB/RGO composite absorbent by the liquid phase method, and the CB/RGO composite coatings were prepared by epoxy resin as matrix. The microstructure of the prepared CB/RGO composite absorbent was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effect of the amount and the thickness of absorbent on the electromagnetic properties of the coatings was studied. From the microstructure analysis, the CB particles adhered to the graphene sheets with a “grape-like” structure, and achieved coating growth on the surface, which were dispersed evenly and had good adhesion. The prepared CB/RGO composite coatings possessed a uniform thickness and a density of only 1.1 g/cm3, and had both the lightweight and flexible characteristics. The microwave reflectance test results indicated that the coatings had no obvious strong electromagnetic absorption within high filler loadings of 3.0% and 3.7%, while the coatings showed excellent microwave absorption properties within low filler loadings of 1.6% and 2.3%. When the filler loading is 2.3% and the thickness is 1.9 mm, the coating exhibits the best absorbing performance, the maximum absorbing intensity is -17.1 dB, and the effective absorbing bandwidth reaches 6.63 GHz covering 66.3% of the entire measured bandwidth, showing good broadband absorbing performance. In addition, when the thickness is 2.5 mm, the coating with a filler loading of 2.3% realizes full absorption of the radar wave in the X-band. |
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