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

A technology of wave absorbing material and wool fiber, applied in the field of wave absorbing material, can solve the problems of electromagnetic wave attenuation, narrow frequency band, high density, etc., and achieve the effect of high wave absorption strength, low density and large magnetic loss.

Active Publication Date: 2017-06-13
河北伟成毛毡有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] Weigh 4g of sodium lauryl ether sulfate and add it to 400g of water, stir and mix for 15min, then add 3g of nano iron ferric oxide powder, put it into a high-shear mixing emulsifier, first shear at a speed of 400r / min for 20min, then Shear quickly at 3000r / min for 20min, add 80g of polyethylene glycol after shearing, and disperse with an ultrasonic disperser for 5min to obtain a modified solution for later use; weigh 100g of wool, put the wool into an oven, and heat it at a temperature of 40°C Drying under high temperature for 2 hours, put the dried wool into the pulverizer, pulverize it to a length of 1 cm, put the pulverized wool into a tube-type high-temperature furnace, and raise the temperature to 250 °C at 5 °C / min under the protection of a nitrogen atmosphere. After heat preservation for 1 hour, raise the temperature to 500°C, continue heat preservation for 1 hour, cool to room temperature after heat preservation, and stop feeding nitrogen to obtain carbonized woo...

example 2

[0022]Weigh 5g of sodium lauryl ether sulfate and add it to 500g of water, stir and mix for 17min, then add 4g of nano iron ferric oxide powder, put it into a high-shear mixing emulsifier, first shear at 450r / min for 25min, then Quickly shear at 4000r / min for 20-30min, add 90g of polyethylene glycol after shearing, and disperse with an ultrasonic disperser for 7min to obtain a modified solution for later use; weigh 150g of wool, put the wool into an oven, and dry it at 43 Dry at ℃ for 3 hours, add the dried wool to a pulverizer, and pulverize it to a length of 2 cm. Put the pulverized wool into a tube-type high-temperature furnace, and raise the temperature to 270 °C at 6 °C / min under the protection of a nitrogen atmosphere. ℃, keep warm for 1.5h, then raise the temperature to 525°C, continue to keep warm for 1.5h, cool to room temperature after the heat preservation is over, and stop feeding nitrogen to get carbonized wool; mix the above carbonized wool with spare Mix the mod...

example 3

[0025] Weigh 6g of sodium lauryl ether sulfate and add it to 600g of water, stir and mix for 20min, then add 5g of nano iron ferric oxide powder, put it into a high-shear mixing emulsifier, first shear at a speed of 500r / min for 30min, then Shear quickly at 5000r / min for 30min, add 100g of polyethylene glycol after shearing, and disperse with an ultrasonic disperser for 10min to obtain a modified solution for later use; weigh 200g of wool, put the wool into an oven, and heat it at a temperature of 45°C Drying under high temperature for 4 hours, put the dried wool into the pulverizer, and pulverize it to a length of 3 cm, put the pulverized wool into a tube-type high-temperature furnace, and raise the temperature to 280 °C at 7 °C / min under the protection of a nitrogen atmosphere. After heat preservation for 2 hours, raise the temperature to 550°C, continue heat preservation for 2 hours, cool to room temperature after heat preservation, and stop feeding nitrogen to obtain carbon...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
porosityaaaaaaaaaa
porosityaaaaaaaaaa
porosityaaaaaaaaaa
Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/02C08L5/04C08K13/06C08K9/12C08K3/22C08K3/04C09K3/00
CPCC08K2201/011C08L71/02C09K3/00C08L5/04C08K13/06C08K9/12C08K2003/2275C08K2003/2262C08K3/04
Inventor 戴琪王志成
Owner 河北伟成毛毡有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap