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Preparation of carbon nanotube-conducting high-polymer material/ferrite composite polyurethane

A conductive polymer and composite polyurethane technology, which is applied in the field of radiation protection materials, can solve the problems of cutting-edge discharge, difficulty in mixing fibers uniformly, and large thickness, and achieve the effects of improving wave-absorbing ability, good frequency band compatibility, and maintaining nano-characteristics

Inactive Publication Date: 2015-12-16
WUHAN GENERAL HOSPITAL OF GUANGZHOU MILITARY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the two fibers are difficult to mix evenly, the shielding performance is not very ideal, and there are even problems with tip discharge and penetration
In the early 1970s, silver-plated fabric appeared, which has good protective effect, light and thin, and good wearing performance, but it feels hard
[0004] Although these radiation protection materials can achieve radiation protection effects to a certain extent, due to the wide range of radiation sources and wide frequency bands today, the radiation protection effects of these materials are often unsatisfactory; in addition, in order to achieve the effect of protection, these radiation protection The material is often thick and heavy, which is not convenient for practical use

Method used

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  • Preparation of carbon nanotube-conducting high-polymer material/ferrite composite polyurethane
  • Preparation of carbon nanotube-conducting high-polymer material/ferrite composite polyurethane
  • Preparation of carbon nanotube-conducting high-polymer material/ferrite composite polyurethane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of carbon nanotube-polyaniline / ferrite composite polyurethane comprises the following steps:

[0030] 1) According to the atomic ratio of Fe 3+ : Ba 2+ =12:1 ratio, weigh a certain amount of Fe(NO 3 ) 3 , Ba(NO 3 ) 2 Prepare a solution with a metal ion concentration of 0.4 mol / L, let it stand, and then mix the two solutions to allow them to fully react to obtain a reddish-brown solution and obtain a nitrate solution, which is a mixed solution of ferric nitrate and barium nitrate Add the nitrate mixed solution dropwise into the citric acid solution, and stir while adding to make it evenly mixed; then add an appropriate amount of concentrated ammonia water, add dropwise while stirring, and control the pH value of the solution to be stable at 6.5 to 7.5; Add polyethylene glycol (PEG) to the above solution so that the mass percent concentration of polyethylene glycol in the system is 0-25g / L, then stir for 30 minutes to form a sol; heat the sol i...

Embodiment 2

[0039] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0040] 6) A certain amount of polyaniline / ferrite composite microspheres and nickel-plated carbon nanotubes are added to a quantitative polyurethane emulsion with a mass ratio of 3:1:3, and sheared at high speed to make them uniformly dispersed.

[0041] The shielding effectiveness of the obtained coating is 20.2-34.6dB.

Embodiment 3

[0043] Embodiment 3 is basically the same as Embodiment 1, the difference is:

[0044] 6) Add a certain amount of polyaniline / ferrite composite microspheres and nickel-plated carbon nanotubes to a quantitative polyurethane emulsion with a mass ratio of 1:2:3, and shear at high speed to make them evenly dispersed.

[0045] The shielding effectiveness of the obtained coating is 20.1-37.6dB.

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Abstract

The invention discloses a preparation method of carbon nanotube-conducting high-polymer material / ferrite composite polyurethane for radiation protection, which comprises the following steps: (1) synthesis of M-type ferrite hollow spheres; (2) preparation of conducting high-polymer material / ferrite composite hollow microspheres; (3) preparation of nickel composite carbon nanotube material; (4) preparation of block polyurethane solution; and (5) preparation of carbon nanotube-conducting high-polymer material / ferrite composite polyurethane. By improving the key material composition, the parameters in the treatment and preparation techniques (such as raw material varieties and proportioning, reaction temperature and time and the like) and the like, compared with the prior art, the method disclosed by the invention can effectively solve the problem of narrow absorption frequency band of the existing radiation protection material. The material has small effective thickness for radiation protection, is convenient for actual use, and is low in preparation technique cost.

Description

technical field [0001] The invention belongs to the field of radiation protection materials, and more specifically relates to a preparation method of carbon nanotube-polyaniline / ferrite composite polyurethane for radiation protection. Background technique [0002] With the rapid development of science and technology, in modern warfare and life, people have to face the threat of "invisible killers"—all kinds of radiation: microwave radiation can cause biological effects and damage in the human body through the body surface. Electromagnetic radiation has different degrees of harm to the central nervous system, blood and cardiovascular system, reproductive system and immune system of the human body. In mild cases, people will feel dizzy, weak limbs, dry mouth, loss of appetite, and vision loss. , emotional irritability, etc., and it can lead to irregular menstruation in women, hypofunction in men, induced cancer, and teratogenicity, which seriously threaten people's normal stud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L79/02C08K9/02C08K9/04C08K7/24C08K3/22C08G18/61C08G18/76C08G18/32C08G18/38C08G18/65C08G73/02
Inventor 卢绮萍李世普易峰涛戴红莲张智勇张平李汉军
Owner WUHAN GENERAL HOSPITAL OF GUANGZHOU MILITARY
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