Robust carbon nanotube foam for efficient electromagnetic interference shielding and microwave absorption
| Autor: | Li-Chuan Jia, Ding-Xiang Yan, Quan-Chao Zhang, Meng-Zhu Li, Zhong-Ming Li, Xiao-Peng Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Electromagnetic interference 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Biomaterials Colloid and Surface Chemistry Compressive strength EMI law Attenuation coefficient Electromagnetic shielding Composite material 0210 nano-technology Absorption (electromagnetic radiation) Microwave |
| Zdroj: | Journal of colloid and interface science. 530 |
| ISSN: | 1095-7103 |
| Popis: | Lightweight and robust carbon nanotube (CNT)/chitosan (CS) foams were assembled by a facile unidirectional freeze-drying method in this work. The CNT/CS foam exhibited an excellent electromagnetic interference (EMI) shielding effectiveness (SE) of 37.6 dB while the density was only 17.6 mg·cm−3, and thus the corresponding specific SE was up to 8556 dB·cm2·g−1. The superior EMI shielding performance was mainly attributed to the perfect conductive networks. Additionally, the absorption coefficient of CNT/CS foam was up to 81.73% under high EMI SE of 37.6 dB, which was remarkable among the reported EMI shielding materials with comparable EMI shielding level. More importantly, the addition of CS significantly increased the compressive strength and modulus of CNT/CS foam to 34.1 KPa and 177.1 KPa, which were 84% and 149% higher than those for the pure CNT foam, respectively. These results indicate that the CNT/CS foam is an ideal high-efficient EMI shielding material, which has high potential applications in the fields of aerospace, automotive, and electronic devices. |
| Databáze: | OpenAIRE |
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