Method for preparing wave-absorbing material by means of wool fibers

Abstract

The invention discloses a method for preparing a wave-absorbing material by means of wool fibers, and belongs to the technical field of wave-absorbing materials. The method comprises the steps that firstly, a surfactant and water are mixed, then nano ferroferric oxide is added, low-speed emulsification is adopted, then high-speed emulsification is performed, and an emulsified mixture is mixed with polyethylene glycol to obtain modified liquid; secondly, wool is smashed and carbonized, and then added into the modified liquid to be soaked, the ferroferric oxide is loaded on the surface of the carbonized wool, and modified wool is obtained for standby application; thirdly, manganese dioxide powder, a stabilizer, a complexing agent and sodium alginate are taken and added into deionized water, stirring mixing is performed, then nickel chloride hexahydrate is added, and stirring reaction is performed to obtain a sodium alginate gel fluid containing metal; and fourthly, the gel fluid and the modified wool are mixed, and then solidified after a calcium chloride solution is added dropwise, freeze drying is performed after solidification, and the wave-absorbing material can be obtained. The wave-absorbing material prepared through the method disclosed by the invention is low in density and wide in bandwidth range, all electromagnetic waves can be fast attenuated by means of the wave-absorbing material of the material composition and structure, and wide application prospects are achieved.

Description

technical field [0001] The invention discloses a method for preparing a wave-absorbing material by using wool fiber, and belongs to the technical field of wave-absorbing materials. Background technique [0002] Absorbing material refers to the ability to absorb the electromagnetic wave energy projected onto its surface, and convert the electromagnetic wave energy into heat energy or other forms of energy through the dielectric loss of the material. It is generally composed of a matrix material (or adhesive) and an absorption medium (absorbent) Composite. Due to the different chemical composition and microstructure of various materials, the absorbing mechanism is also different. [0003] Nevertheless, the microwave-absorbing properties of materials can still be analyzed using macroscopic electromagnetic theory, and engineering often uses the macroscopic permittivity and magnetic permeability of materials to evaluate the reflection and transmission characteristics of microwav...

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a method for preparing a wave-absorbing material by using wool fiber in view of the shortcomings of narrow frequency band, high density, and low performance in the development of wave-absorbing materials at home and abroad. After mixing the surfactant and water, add nano ferric oxide, emulsify at a low speed and then emulsify at a high speed, and mix with polyethylene glycol after emulsification to obtain a modified liquid, then pulverize and carbonize the wool and add it to the modified liquid for soaking , load ferroferric oxide on the surface of the carbonized wool to obtain the modified wool, set aside, take manganese dioxide powder, stabilizer, complexing agent and sodium alginate and add it to deionized water, stir and mix, add hexahydrate Nickel chloride, stirring and reacting to obtain metal-containing sodium alginate glue, mixing the glue with modified wool, adding calcium chloride solution dropwise to solidify, and freeze-drying after solidification to obtain a wave-absorbing material. The wave-absorbing material prepared by the invention has low density, light weight, and wide frequency. Using its material composition and structure, it can quickly attenuate all electromagnetic waves and has a wide range of application prospects.