Composite material for shielding electromagnetic radiation

Abstract

The invention discloses a composite material for shielding electromagnetic radiation, and the composite material is prepared from raw materials of silicon carbide fiber, thermoplastic acrylic resin, aferrocene organic magnet, N-phenyl-beta-naphthylamine, zinc stearate, polyvinyl chloride, a conductive filler, a coupling agent, a filler, a stabilizer and other auxiliary agents; the composite material combines the advantages of a multilayer structural material and a gradient structural material, and has the performances superior to that of the two materials. Due to the impedance mismatch between a material absorption layer and a reflection layer, incident electromagnetic wave may generate multiple reflections, propagation paths of the electromagnetic wave in the material can be increased, and by the increase of multiple-reflection loss and absorption loss, the shielding effectiveness of the material become larger; the difference in impedance between the absorption layer and the reflection layer is reduced, so that the electromagnetic wave may not escape the shielding material too quickly due to reflection, and can enter a next shielding unit more, and the shielding effectiveness ofthe material can be further improved. Therefore, the composite shielding material of the structure has better shielding properties.

Description

Technical field [0001] The invention relates to the field of material engineering, in particular to a composite material used for shielding electromagnetic radiation. Background technique [0002] Electromagnetic radiation is a product of modern civilization. With the rapid development of wireless communication tools, radio and television, the comprehensive promotion of office computer automation, and the rapid popularization of household appliances, although it has brought great convenience and speed to people's lives, it is also Produced a new type of environmental pollution - electromagnetic radiation. [0003] In today's information age, electromagnetic radiation is ubiquitous in our lives. In addition to television, radio, and radar detection, aviation management, astronomical measurement, radio remote control, and communications, as well as home appliances and nuclear energy, all emit various radiations. Electromagnetic radiation of energy. This invisible, intangible...

AI Technical Summary

Problems solved by technology

[0005] As we all know, long-term exposure to electromagnetic radiation is harmful to the human body. It can cause changes in cell membranes and proteins in the body, and damage the biological structure and nervous system of the human body. Research reports show that long-term electromagnetic radiation has the greatest impact on children and fetuses. The incidence of childhood cancer is 2-3 times higher than the normal standard, and the rate of fetal miscarriage and distortion is greatly increased. At the same time, a large number of data show that the electromagnetic radiation of commercially available mobile phones is more than 20 times the specified standard, and long-term use will cause mental disorders. , memory decline, vision loss and other adverse consequences; because the electromagnetic radiation produced by computers and TVs can induce cancer, leukemia, etc., and cause death unconsciously

The effects of high doses and prolonged radiation are obvious, however, lower doses and prolonged radiation can cause disease and even death

[0006] At present, there is no effective way to avoid the harm of electromagnetic radiation

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