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A preparation method of polyaniline nano ring wire with wave-absorbing properties

A wave-absorbing performance and polyaniline technology, which is applied in the field of preparation of polyaniline nano ring wires, can solve the problems of high electrical conductivity, lack of electrical conductivity, and decreased resistivity of polyaniline, and achieve the effect of light-weight wave-absorbing performance

Active Publication Date: 2021-09-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The intrinsic state polyaniline material has high conductivity and almost no conductivity, but the resistivity of doped polyaniline is greatly reduced, and the conductivity is greatly improved. The conductivity is between semiconductors and conductors.

Method used

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  • A preparation method of polyaniline nano ring wire with wave-absorbing properties

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preparation example Construction

[0028] A kind of preparation method of the polyaniline nano ring wire that the present invention proposes has wave-absorbing property, concrete steps are as follows:

[0029] (1) Preparation of dispersion A: Weigh 0.01mol-1.0mol of protonic acid, add 0.01-0.1mol of cetyltrimethylammonium bromide (CTAB) into 10-280ml of water; under 400W power, ultrasonically disperse 1- 25min, make cetyltrimethylammonium bromide, protonic acid fully dispersed in water, the protonic acid that adopts in this step can be selected any one in hydrochloric acid, p-toluenesulfonic acid or salicylic acid;

[0030] (2) Preparation of dispersion B: ultrasonically disperse 0.03-0.1mol aniline (An) in 20-100ml of water to obtain An dispersion, ultrasonically disperse An dispersion in ice-water mixture, ultrasonic power is 320W, ultrasonic time is 1 -10min;

[0031] (3) Preparation of dispersion C: add 0.01-0.1mol of oxidizing agent into 10-250ml of deionized water, and disperse ultrasonically for 1-10min...

Embodiment 1

[0036] This embodiment is a method for preparing a polyaniline nano ring wire with wave-absorbing properties, which is carried out according to the following steps:

[0037] (1) Preparation of dispersion A: Weigh 0.02mol of p-toluenesulfonic acid, add 0.01mol of cetyltrimethylammonium bromide (CTAB) into 280ml water; under 400W power, ultrasonically disperse for 25min to make surfactant, Protonic acid is fully dispersed in water;

[0038] (2) Preparation of dispersion B: ultrasonically disperse 0.03 mol of aniline (An) in 20 ml of water to obtain an An dispersion, and ultrasonically disperse the An dispersion in an ice-water mixture with an ultrasonic power of 320 W and an ultrasonic time of 10 min;

[0039] (3) Preparation of dispersion C: add 0.01 mol of ammonium persulfate to 10 ml of deionized water, and disperse ultrasonically for 10 min at a power of 300 W;

[0040] (4) Preparation of polyaniline nano ring wire: the dispersion A is placed in the ice-water mixture contai...

Embodiment 2

[0046] This embodiment is a method for preparing a polyaniline nano ring wire with wave-absorbing properties, which is carried out according to the following steps:

[0047] (1) Preparation of dispersion A: Weigh 0.3 mol of hydrochloric acid and 0.01 mol of cetyltrimethylammonium bromide (CTAB) into 280 ml of water; under 400W power, ultrasonically disperse for 25 minutes to make the surfactant and protonic acid fully dispersed in water;

[0048] (2) Preparation of dispersion B: ultrasonically disperse 0.03 mol of aniline (An) in 20 ml of water to obtain an An dispersion, and ultrasonically disperse the An dispersion in an ice-water mixture with an ultrasonic power of 320 W and an ultrasonic time of 8 min;

[0049] (3) Preparation of dispersion C: add 0.01 mol of ammonium persulfate to 10 ml of deionized water, and disperse ultrasonically for 10 min at a power of 300 W;

[0050] (4) Preparation of polyaniline nano ring wire: the dispersion A is placed in the ice-water mixture...

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Abstract

The invention relates to a preparation method of a polyaniline nano ring wire with wave-absorbing performance, which comprises fully dispersing a protonic acid and a surfactant in water to obtain a dispersion A; dispersing aniline in water to obtain an aniline dispersion, and then dispersing it in ice water In the mixture, dispersion liquid B was obtained; the oxidant was dispersed in deionized water to obtain dispersion liquid C; dispersion liquid A was placed in ice-water mixture and stirred, after cooling down, dispersion liquid B was added, and dispersion liquid C was gradually added after continuing to stir. Stirring was continued in the ice-water bath, and then the reaction was left to stand in a refrigerator; the reaction liquid obtained by the standing reaction was suction filtered, washed with deionized water and ethanol until the supernatant was colorless and transparent, and dried to obtain polyaniline nano ring wires. Compared with the prior art, the present invention not only has good wave-absorbing strength and wave-absorbing bandwidth, but also can be conveniently applied as a coating raw material to the surface of a device requiring electromagnetic protection, so that it can work normally without being disturbed by electromagnetic waves.

Description

technical field [0001] The invention relates to a method for preparing a wave-absorbing material, in particular to a method for preparing a polyaniline nano ring wire with wave-absorbing performance. Background technique [0002] The intrinsic state polyaniline material has high conductivity and almost no conductivity, but the resistivity of doped polyaniline is greatly reduced, and the conductivity is greatly improved. The conductivity is between semiconductors and conductors. Among conductive polymers, polyaniline has become the most widely used microwave absorbing material due to its advantages of low cost, convenient preparation process, strong microscopic shape plasticity, dynamic microwave absorption characteristics and good microwave absorption ability in low frequency bands. Conductive polymers. In recent years, polyaniline conductive composites also have potential applications in electromagnetic wave absorption, electromagnetic interference shielding, soft conducto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02B82Y30/00B82Y40/00H05K9/00
CPCB82Y30/00B82Y40/00C08G73/0266H05K9/0081
Inventor 邱军施煜楠
Owner TONGJI UNIV