Woody electromagnetic shielding material and preparation method of same

Abstract

The invention discloses a woody electromagnetic shielding material and a preparation method of same. The electromagnetic shielding material is composed of, by weight, 20-30 parts of vinyl acetate, 8-12 parts of carbon black particles, 3-5 parts of N,N-methylene bisacrylamide, 5-10 parts of isooctyl tin acetate, 3-8 parts of ethylene glycol, 3-7 parts of diisocyanate, 1-3 parts of calcium chloride, and 100-150 parts of water. The production process and selection of raw materials of the woody electromagnetic shielding material satisfy green and environment-friendly demand. Bamboo wood serves as a substrate of the material, so that durability of the material is effectively improved and weight of the material is reduced. The electromagnetic shielding material has very strong shielding effect on electromagnetic wave in the waveband of 0.02-2.00 GHz, and can be used in electromagnetic shielding apparatuses in clothing, building, electronic equipment and the like. The material is low in manufacturing cost, has wide source of raw materials, and is suitable for application in large scale.

Description

technical field [0001] The invention belongs to the field of composite polymer materials, and in particular relates to a wooden electromagnetic shielding material and a preparation method thereof. Background technique [0002] With the rapid development of the electronic information industry, electrical and electronic equipment has been widely used in all walks of life. While they provide great convenience to people's lives, they also expose serious electromagnetic pollution problems. Relevant studies have confirmed that electromagnetic waves emitted by electronic and electrical equipment will not only interfere with the normal operation of other instruments and equipment, but may also lead to information leakage and even endanger human health. Electromagnetic pollution has become the fourth major public hazard that endangers human existence after noise pollution, air pollution and water pollution. The impact of electromagnetic pollution on human production and life is main...

AI Technical Summary

Problems solved by technology

Electronic equipment or devices will radiate electromagnetic waves of different frequencies and energies to the external space under working conditions. These harmful electromagnetic waves will interfere with the normal operation of other precision electronic instruments and systems. At the same time, the normal operation of these devices is also affected by other similar instruments around. The interference of the emitted electromagnetic waves will cause the performance of electronic equipment and systems to deviate from the expected indicators, the performance of equipment will decline, malfunction, and even lead to the paralysis of the entire system in severe cases.

[0004] (2) Electromagnetic information leakage: With the widespread use of computers and other instruments and equipment in the military and other confidential departments, these instruments and equipment will radiate electromagnetic waves containing processed information during their work, which may lead to some confidentiality. The information is stolen by others or institutions, causing irreparable and serious losses to the country's politics, military, economy, etc.

However, its application range is limited, and the cement-based preparation method makes it only as an electromagnetic shielding material for building structures.

Moreover, the core of its preparation raw material is metallic nickel, and the cost is relatively high.