Carbon nanotube/polymer composite absorbing material: a new star in future electromagnetic protection

In the modern society where electromagnetic waves are ubiquitous, electromagnetic pollution and interference have become increasingly serious problems. From military stealth to civilian electromagnetic shielding, efficientAbsorberThe demand is becoming increasingly urgent. In this context, carbon nanotube/polymer composite absorbing materials have gradually become star materials in the field of scientific research due to their unique properties and potential application value.

1、 Carbon nanotubes: a new hope for electromagnetic wave absorption

Carbon nanotubes, as a one-dimensional nanomaterial, have become a leader in the field of electromagnetic wave absorption due to their unique structure and excellent physical properties. Its huge aspect ratio and nanoscale size endow carbon nanotubes with excellent electrical loss performance, enabling efficient absorption of electromagnetic waves when interacting with them. Combined with its lightweight and good thermal stability, carbon nanotubes undoubtedly bring new possibilities to the field of electromagnetic wave absorption.

2、 Polymer: the perfect partner for composite materials

However, there are still shortcomings in the absorption performance of single carbon nanotubes, such as poor impedance matching and a single loss mechanism. At this point, polymers, as the perfect partner of carbon nanotubes, provide strong support for the preparation of composite absorbing materials with their excellent processability and mechanical properties. Polymers can not only improve the dispersibility of carbon nanotubes, but also achieve precise control of the absorbing properties of composite materials by regulating their types and contents.

3、 Performance analysis of carbon nanotube/polymer composite absorbing materials

In practical research, researchers have prepared carbon nanotube/polymer composites with different proportions and conducted in-depth exploration of their absorbing properties. Experimental data shows that when the ratio of carbon nanotubes to polymers is appropriate, the composite material exhibits the best absorption performance. For example, in a composite material with a carbon nanotube content of 10vol%, the bandwidth of -5dB absorption reflectivity reached 9.2GHz, demonstrating excellent absorption performance.

In addition, the structure of composite materials also has a crucial impact on their absorption performance. By constructing specific structures, such as core-shell structures, the absorption performance of composite materials can be further improved. In this structure, carbon nanotubes serve as the core, while polymers wrap around the outer shell. This structure not only enhances the stability of the composite material, but also facilitates multiple reflections and scattering of electromagnetic waves inside the material, thereby improving the absorption efficiency.

4、 Application prospects of carbon nanotube/polymer composite absorbing materials

Carbon nanotube/polymer composite absorbing materialWith its excellent performance and potential application value, it has shown broad application prospects in fields such as radar stealth and electromagnetic shielding. In the military field, this material can be used for the skin manufacturing of stealth fighter jets to improve their radar stealth performance; In the civilian field, it can be applied to electromagnetic shielding of electronic devices to reduce the impact of electromagnetic radiation on the human body.

5、 Looking ahead to the future

Although carbon nanotube/polymer composite absorbing materials have made significant progress in performance, they still face some challenges in practical applications. How to further improve the absorption performance of composite materials, reduce manufacturing costs, and achieve large-scale production still requires continued efforts from researchers. With the continuous development of technology, it is believed that in the near future, carbon nanotube/polymer composite absorbing materials will demonstrate their unique charm in more fields.