Preparation method of polyacrylonitrile electromagnetic shielding nanocomposite

A nano-composite material, polyacrylonitrile technology, applied in the field of preparation of polyacrylonitrile electromagnetic shielding nano-composite materials, can solve the problems of easy fire and explosion, no anti-electromagnetic radiation, no absorption and reflection, etc., and achieve dimensional stability Good performance, adjustable electrical conductivity, and increased fill factor

Inactive Publication Date: 2013-06-19
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary polymer materials are insulators. On the one hand, they are easy to accumulate electrostatic charges, which can easily cause fires and explosions in flammable and explosive places. On the other hand, they are almost transparent to electromagnetic waves, cannot absorb and reflect, and have no shielding ability. Has the performance of anti-electromagnetic radiation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] ① Put the multi-walled carbon nanotubes in a single-necked flask, add 70% concentrated nitric acid under vigorous stirring, reflux for 1 hour in a constant temperature oil bath at 140°C, then take them out, dilute with deionized water, filter, and repeat with deionized water Rinse, and finally put the obtained black solid in a vacuum oven at 50° C. to dry to constant weight to obtain purified carbon nanotubes.

[0028] ② Put 3 grams of purified carbon nanotubes together with 90 grams of polyacrylonitrile and 0.05 grams of sodium lauryl sulfate in 600 grams of DMF and fully stir, dissolve the polyacrylonitrile at 70°C to obtain a blended solution. Ultrasonic dispersion equipment was used to perform 60min ultrasonic dispersion treatment on the blended solution under the conditions of an ultrasonic dispersion power of 200W and a dispersion power of 60 kHz.

[0029] ③ At room temperature, 7 grams of silver nitrate dissolved in 100 grams of DMF was added dropwise to the above ble...

Embodiment 2

[0032] ① Put the multi-arm wall carbon nanotubes into a single-necked flask, add 70% concentrated nitric acid under vigorous stirring, reflux in a constant temperature oil bath at 140℃ for 0.5 hours, then take it out, dilute with deionized water, filter, and use deionized water Repeated rinsing, and finally the obtained black solid was dried in a vacuum oven at 50°C to a constant weight to obtain purified carbon nanotubes.

[0033] ② Put 3 grams of purified carbon nanotubes together with 87 grams of polyacrylonitrile and 0.05 grams of sodium lauryl sulfate in 600 grams of DMF and fully stir, dissolve the polyacrylonitrile at 70°C to obtain a blended solution. Ultrasonic dispersion equipment was used to perform 60min ultrasonic dispersion treatment on the blended solution under the conditions of an ultrasonic dispersion power of 200W and a dispersion power of 60 kHz.

[0034] ③ At room temperature, 10 grams of silver nitrate dissolved in 100 grams of DMF was added dropwise to the ab...

Embodiment 3

[0037] ①Put the single-arm wall carbon nanotubes in a single-necked flask, add 98% concentrated sulfuric acid under vigorous stirring, reflux for 1.5 hours in a constant temperature oil bath at 120℃, and then take them out, dilute with deionized water, filter, and use deionized water Repeated washing, drying to constant weight in a vacuum oven, to obtain purified single-arm carbon nanotubes.

[0038] ②Put 4 grams of purified one-arm carbon nanotubes, 86 grams of polyacrylonitrile and 0.08 grams of sodium dodecylbenzene sulfonate in 600 grams of DMF and stir thoroughly, dissolve the polyacrylonitrile at 70°C to obtain a blend Solution. Ultrasonic dispersion equipment was used to perform ultrasonic dispersion treatment on the above-mentioned blended solution for 120 minutes at an ultrasonic dispersion power of 100 W and a dispersion power of 80 kHz.

[0039] ③ At room temperature, 10 grams of silver nitrate dissolved in 100 grams of DMF was added dropwise to the above blended soluti...

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Abstract

The invention discloses a preparation method of a polyacrylonitrile electromagnetic shielding nanocomposite. Firstly, silver nitrate, carbon nano tubes, dispersing agents and polyacrylonitrile serve as raw materials to be dissolved in dimethylformamide to carry out solution mixing, then after hydrostomia on a substrate, drying is carried out under 120-190 DEG C, film shaping is carried out, meanwhile the silver nitrate is degraded into nano-silver particles to be dispersed in a composite system, and finally a composite material formed by the nano-silver particles, the carbon nano tubes, the dispersing agents and the polyacrylonitrile is formed. According to the preparation method, the nano-silver / carbon nano tubes / polyacrylonitrile material is simple in preparation process, no complex equipment is needed, forming processing and shielding functions are completed at a time, and electromagnetic shielding performance is stable and reliable; and due to the advantages of light weight, easy processing in various shapes, good size stability, adjustable conducting performance in a wide range, and the like, the material has wide application in the fields of static electricity prevention, microwave absorption, electromagnetic shielding, electrochemistry, and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a preparation method of a polyacrylonitrile electromagnetic shielding nanocomposite material. Background technique [0002] With the rapid development of the electronics industry and the increasing popularity of various commercial and household communication equipment and electronic products, the electromagnetic radiation generated by these products will fill the space with electromagnetic waves of different wavelengths and frequencies, making electromagnetic radiation pollution more and more serious. Electromagnetic radiation will not only interfere with communication equipment such as radio and television, but also affect human health. If the human body is exposed to electromagnetic radiation for a long time, the nervous system, cardiovascular system, endocrine system, reproductive system, and immune system will be damaged to varying degrees. . Electromagnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/20C08K3/08C08K7/00C08K3/04C08J5/18
Inventor 赵金安胡继勇马步伟
Owner HENAN UNIV OF URBAN CONSTR
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