Wave-absorbing material and preparation method thereof

Abstract

The invention provides a wave-absorbing material and a preparation method thereof. The wave-absorbing material is prepared from the following raw materials in parts by mass: 5-15 parts of thermosetting elastomer, 60-80 parts of flaky wave-absorbing agent, 0.1-2 parts of curing agent, 0.1-0.5 part of accelerator and 20-30 parts of solvent. The preparation method comprises the following steps: (1) dissolving a matrix; (2) mixing the matrix with the wave-absorbing agent; (3) scraping the base material; and (4) flattening the surface by a double-roller calender, and passing through a tunnel furnace to perform high-temperature curing, thereby obtaining the product. The method prevents the calendering from crushing the flaky wave-absorbing agent, and maintains the completeness of the flaky wave-absorbing agent particles. The magnetic poles are added to well orient the flaky wave-absorbing agent, thereby avoiding unordered arrangement of the particles in the high-polymer matrix due to calendering. The wave-absorbing material has the advantages of very high magnetic permeability and favorable electromagnetic wave absorption property, and can be prepared into a material of which the minimum thickness is 0.03mm.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a wave-absorbing material and a preparation method thereof. Background technique [0002] With the development of science and technology, the impact of electromagnetic radiation on the environment is increasing, and the demand for absorbing materials and shielding materials is also increasing. At the airport, flights are delayed due to electromagnetic wave interference; in hospitals, mobile phones often interfere with the normal work of various electronic medical instruments. In future high-tech and three-dimensional warfare, weapons and equipment will always face severe challenges of detection and anti-detection. The absorbing material is the key technology in the stealth technology, and the research on introducing the absorbing material into the stealth technology is highly valued by countries all over the world. At the same time, the military is in need of stealth for...

AI Technical Summary

Problems solved by technology

However, limited by the material properties, for any powder absorbent and rubber substrate, there is an upper limit for filling in the mixing process, and the larger the filler particles, the harder it is to increase the filling concentration; the worse the rubber coating, the filling concentration more difficult to improve

In recent years, with the research on the preparation technology of flexible wave-absorbing materials for rubber substrates, some achievements have been made in increasing the upper limit of the filling concentration, such as modifying the rubber substrate to enhance the coating performance of the rubber substrate; Surface treatment, improving the bonding performance of metal powder and organic rubber, etc. These methods can increase the filling concentration, but require more complex processes and more professional equipment

more expensive

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