Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultra-light graphene/multi-walled carbon nanotube composite wave-absorbing foam and preparation method thereof
The invention discloses ultra-light graphene/multi-walled carbon nanotube composite wave-absorbing foam and a preparation method thereof. The preparation method comprises the following steps: ultrasonically dispersing raw materials such as graphene oxide and carboxylated multi-walled carbon nanotubes into water, adding an alcohol solvent, and uniformly stirring the mixture; then, placing the mixture in a vacuum environment for standing treatment; and carrying out oriented freezing, freeze drying treatment and thermal reduction treatment in sequence to obtain the graphene/multi-walled carbon nanotube composite wave-absorbing foam. The interior of the composite wave-absorbing foam is provided with a directional aperture structure. The shape of the composite wave-absorbing foam and the average internal diameter of the composite wave-absorbing foam are controllable; the density is as low as 0.002-1.2 g/cm<3>; the graphene/multi-walled carbon nanotube composite wave-absorbing foam has an electromagnetic wave absorption effect at 2-40 GHz, and has excellent wave-absorbing properties lower than-8 dB,-10 dB and-17 dB in X, Ku and Ka frequency bands; and the graphene/multi-walled carbon nanotube composite wave-absorbing foam can be further compounded with a plastic polymer material and the like to improve the mechanical properties. The preparation process of the composite foam is simple, low in cost and suitable for large-scale production.
本发明公开了一种超轻石墨烯/多壁碳纳米管复合吸波泡沫及其制备方法。将氧化石墨烯及羧基化多壁碳纳米管等原料超声分散至水中后加入醇类溶剂搅拌均匀，再置于真空环境中进行静置处理后，依次进行取向冷冻和冷冻干燥处理及热还原处理，即得石墨烯/多壁碳纳米管复合吸波泡沫，该复合吸波泡沫内部具有定向孔径结构，且复合吸波泡沫的形状及内部平均内径大小可控，密度低至0.002～1.2g/cm，在2～40GHz具有电磁波吸收效果，在X、Ku、Ka频段具有低于‑8dB、‑10dB、‑17dB的优异的吸波性能，且石墨烯/多壁碳纳米管复合吸波泡沫可以与塑性高分子材料等进一步复合来改善力学性能。复合泡沫的制备过程简单、成本低，可大规模生产。
Ultra-light graphene/multi-walled carbon nanotube composite wave-absorbing foam and preparation method thereof
The invention discloses ultra-light graphene/multi-walled carbon nanotube composite wave-absorbing foam and a preparation method thereof. The preparation method comprises the following steps: ultrasonically dispersing raw materials such as graphene oxide and carboxylated multi-walled carbon nanotubes into water, adding an alcohol solvent, and uniformly stirring the mixture; then, placing the mixture in a vacuum environment for standing treatment; and carrying out oriented freezing, freeze drying treatment and thermal reduction treatment in sequence to obtain the graphene/multi-walled carbon nanotube composite wave-absorbing foam. The interior of the composite wave-absorbing foam is provided with a directional aperture structure. The shape of the composite wave-absorbing foam and the average internal diameter of the composite wave-absorbing foam are controllable; the density is as low as 0.002-1.2 g/cm<3>; the graphene/multi-walled carbon nanotube composite wave-absorbing foam has an electromagnetic wave absorption effect at 2-40 GHz, and has excellent wave-absorbing properties lower than-8 dB,-10 dB and-17 dB in X, Ku and Ka frequency bands; and the graphene/multi-walled carbon nanotube composite wave-absorbing foam can be further compounded with a plastic polymer material and the like to improve the mechanical properties. The preparation process of the composite foam is simple, low in cost and suitable for large-scale production.
本发明公开了一种超轻石墨烯/多壁碳纳米管复合吸波泡沫及其制备方法。将氧化石墨烯及羧基化多壁碳纳米管等原料超声分散至水中后加入醇类溶剂搅拌均匀，再置于真空环境中进行静置处理后，依次进行取向冷冻和冷冻干燥处理及热还原处理，即得石墨烯/多壁碳纳米管复合吸波泡沫，该复合吸波泡沫内部具有定向孔径结构，且复合吸波泡沫的形状及内部平均内径大小可控，密度低至0.002～1.2g/cm，在2～40GHz具有电磁波吸收效果，在X、Ku、Ka频段具有低于‑8dB、‑10dB、‑17dB的优异的吸波性能，且石墨烯/多壁碳纳米管复合吸波泡沫可以与塑性高分子材料等进一步复合来改善力学性能。复合泡沫的制备过程简单、成本低，可大规模生产。
Ultra-light graphene/multi-walled carbon nanotube composite wave-absorbing foam and preparation method thereof
一种超轻石墨烯/多壁碳纳米管复合吸波泡沫及其制备方法
DU ZUOJUAN (Autor:in) / ZHANG QIANCHENG (Autor:in) / HUANG XIAOZHONG (Autor:in) / CHEN AILIANG (Autor:in) / HOU MINGMING (Autor:in)
02.06.2020
Patent
Elektronische Ressource
Chinesisch
Ferrite/carbon composite inorganic foam wave-absorbing material and preparation method thereof
| Europäisches Patentamt | 2020
Electromagnetic wave absorbing properties of multi-walled carbon nanotube/cement composites
| Online Contents | 2013
Electromagnetic wave absorbing properties of multi-walled carbon nanotube/cement composites
| British Library Online Contents | 2013
Properties of multi-walled carbon nanotube reinforced carbon foam composites
| British Library Online Contents | 2011