Research on the properties of carbon nanotube/polymer composite absorbing materials: exploring the future of new electromagnetic stealth technologies

In today's rapidly developing technology, stealth technology, as a key technology in military, aerospace and other fields, is increasingly attracting people's attention. Among them,AbsorberAs a core component of stealth technology, its performance directly affects the implementation of stealth effects. In recent years, carbon nanotube/polymer composite absorbing materials have become a research hotspot in the field of stealth technology due to their excellent absorbing and mechanical properties. This article will analyze the performance characteristics of carbon nanotube/polymer composite absorbing materials from multiple dimensions and explore their potential application value in stealth technology.

1、 The complementary advantages of carbon nanotubes and polymers

Carbon nanotubes, as a new type of nanomaterial with a large aspect ratio and small size effect, have particularly outstanding electrical loss performance. Under the effect of quantum confinement, electrons in carbon nanotubes move along the axial direction, endowing them with metallic and semiconductor properties, providing favorable conditions for electromagnetic wave absorption. Polymers are known for their excellent processing and mechanical properties, and are widely used in various composite materials. By combining carbon nanotubes with polymers, complementary advantages in performance can be achieved, resulting in the preparation of composite absorbing materials with both excellent absorbing properties and good mechanical properties.

2、 Preparation process of carbon nanotube/polymer composite absorbing material

When preparing carbon nanotube/polymer composite absorbing materials, methods such as solution blending and in-situ polymerization are commonly used. Taking the solution blending method as an example, first disperse an appropriate amount of carbon nanotubes in an organic solvent, then add a polymer solution for mixing, and finally prepare composite absorbing materials through casting, curing and other processes. This method is simple and easy to implement, which can achieve uniform dispersion of carbon nanotubes in polymer matrix, thereby improving the absorption performance of composite materials.

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

1. Excellent absorption performance

Carbon nanotube/polymer composite absorbing materials exhibit excellent absorption of electromagnetic waves. Research has shown that when the ratio of carbon nanotubes to polymers is appropriate, the absorption performance of composite materials can reach its optimal level. For example, in the case of a carbon nanotube to epoxy resin ratio of 1:100, a 3mm thick absorber layer sample exhibits an absorption peak at 14.32GHz, reaching -10.01dB, with an absorption bandwidth of 2.16GHz (R<8dB). In addition, as the thickness increases, the absorption performance of the composite material will also be improved.

2. Improvement of mechanical properties

Carbon nanotube/polymer composite absorbing materials also exhibit excellent mechanical properties. Due to the extremely high strength and toughness of carbon nanotubes, their mechanical properties can be significantly improved when combined with polymers. This composite absorbing material not only has excellent absorbing performance, but also can withstand significant mechanical stress, making it suitable for stealth applications in various complex environments.

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

Carbon nanotube/polymer composite absorbing materials have broad application prospects in military, aerospace and other fields due to their excellent absorbing and mechanical properties. For example, in the manufacturing of stealth aircraft, this composite absorbing material can be used to prepare skin with excellent stealth performance, effectively reducing the exposure probability of the aircraft under radar detection. In addition, this composite absorbing material can also be applied to military equipment such as ships and missiles, improving their survivability on the battlefield.

in summary,Carbon nanotube/polymer composite absorbing materialAs a new type of electromagnetic stealth material, it has unique performance advantages and application value. With the continuous advancement of technology and the deepening development of stealth technology, it is believed that this composite absorbing material will play a more important role in the future, providing strong support for the development of military, aerospace and other fields.