Preparation method of material with good wave-absorbing effect

Abstract

The invention discloses a preparation method of a material with a good wave-absorbing effect. The wave-absorbing material comprises the following raw materials in parts by weight: 90-110 parts of epoxy resin, 10-30 parts of plastic microspheres, 4-10 parts of a curing agent, 5-15 parts of an accelerant, 50-150 parts of a wave-absorbing agent, 50-70 parts of aerogel, 10-30 parts of thermoplastic resin, 30-50 parts of magnetic metal powder and 60-80 parts of water. Through formulations by neutralization, an aerogel material is used as a carrier; magnetic metal powder, such as an iron material, is deposited into the aerogel; then thermoplastic resin is added; the insulation characteristic of the thermoplastic resin is utilized; the thermoplastic wave-absorbing material is prepared; the composite wave-absorbing material substrate with high resistivity is prepared, thermoset of epoxy resin and plastic microspheres is utilized; the curing reaction of the epoxy resin is improved by adding thecuring agent and the accelerant, so that the overall wave-absorbing performance and heat resistance of the wave-absorbing material are improved, the density of the composite material is reduced, theantistatic effect is improved, the material is lightened, and the utilization rate of the material is increased.

Description

technical field [0001] The invention relates to a production process of a wave-absorbing material, more specifically, to a method for preparing a material with a good wave-absorbing effect. Background technique [0002] With the development of modern science and technology, the impact of electromagnetic radiation on the environment is increasing. At airports and airplanes, flights are delayed due to electromagnetic wave interference, and in hospitals and mobile phones often interfere with the normal work of various electronic diagnostic and therapeutic instruments. Electromagnetic radiation causes direct and indirect damage to the human body through thermal effects, non-thermal effects, and cumulative effects. Research It is confirmed that ferrite absorbing material has the best performance, and it has the characteristics of high absorption frequency band, high absorption rate, and thin matching thickness. Applying this material to electronic equipment can absorb leaked ele...

AI Technical Summary

Problems solved by technology

[0003] The prior art uses rubber such as polysulfide rubber, hydroxy-terminated butyl rubber, etc. to modify epoxy resins, but this method will cause a great loss of mechanical properties and high-temperature performance of the resin; Dielectric properties can improve toughness and high temperature resistance and reduce internal stress, but the compatibility between silicone resin and epoxy resin is poor; the method of adding rigid particles to epoxy resin can reduce material cost and control the thermal expansion and Shrinkage can increase the tensile elastic modulus of the material, but it will increase the internal stress of the epoxy resin composite system, and the base materials of the existing wave-absorbing materials include FR-4 materials, ceramic materials, ferroelectric materials, iron Oxygen materials, etc. Some patent documents disclose the use of transition metal-based aerogels, transition metal oxide aerogels, and composite transition metal oxide aerogels as wave-absorbing materials, and iron oxide aerogels are typically used Realized iron-based materials

FR-4 material is heavy and cannot meet the "lightweight" requirements in many environments. For ferric oxide airgel, if it is directly used as a wave-absorbing material, the absorbing effect will not be good. If the ferric oxide If the aerogel is directly reduced to nano-iron, the network will collapse with the loss of oxygen during the reduction process, and the nanopores will disappear, and the remaining iron is also prone to agglomeration due to its own magnetic field, so it is impossible to realize the nano-sized iron and Lightweight of the entire absorbing material