Preparation method of carbon nanotube/polyaniline nanoparticle with negative dielectric constant

A technology of negative dielectric constant and carbon nanotubes, which is applied in the field of preparation of carbon nanotubes/polyaniline nanoparticles, can solve the problem of inability to synthesize polymer materials with negative dielectric constant, and achieve the effect of ensuring uniformity

Inactive Publication Date: 2016-08-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problem that existing methods cannot synthesize polymer materials with a negative dielectric constant, and provides a method for preparing carbon nanotubes / polyaniline nanoparticles with a negative dielectric constant

Method used

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  • Preparation method of carbon nanotube/polyaniline nanoparticle with negative dielectric constant

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Embodiment １

[0015] Example 1: This embodiment is a method for preparing carbon nanotubes / polyaniline nanoparticles with a negative dielectric constant, which is carried out according to the following steps:

[0016] 1. Preparation of dispersion A: Weigh 0.03 mol of hydrochloric acid, 0.024 mol of potassium permanganate and 1% multi-walled carbon nanotubes, and add them into 300 ml of water. Ultrasonic dispersion for 40 minutes (power 320W) to fully disperse the oxidant, protonic acid and multi-walled carbon nanotubes in water.

[0017] 2. Preparation of dispersion B: 0.036mol aniline (An) dispersed in 60ml of water, An dispersion in ice-water mixture, ultrasonic 60min, power 320W.

[0018] 3. Preparation of carbon nanotubes / polyaniline nanoparticles: the dispersion A was placed in the ice-water mixture contained in the crystallization dish, and the crystallization dish was placed on a magnetic stirrer stirring at a speed of 500 r / min. When the temperature of the dispersion is lower than ...

Embodiment

[0023] Embodiment: This embodiment is a preparation method of carbon nanotubes / polyaniline nanoparticles with a negative dielectric constant, which is carried out according to the following steps:

[0024] 1. Preparation of dispersion A: Weigh 0.03 mol of hydrochloric acid, 0.024 mol of potassium permanganate and 10% multi-walled carbon nanotubes, and add them into 300 ml of water. Ultrasonic dispersion for 40 minutes (power 320W) to fully disperse the oxidant, protonic acid and multi-walled carbon nanotubes in water.

[0025] 2. Preparation of dispersion B: 0.036mol aniline (An) dispersed in 60ml of water, An dispersion in ice-water mixture, ultrasonic 60min, power 320W.

[0026] 3. Preparation of carbon nanotubes / polyaniline nanoparticles: the dispersion A was placed in the ice-water mixture contained in the crystallization dish, and the crystallization dish was placed on a magnetic stirrer stirring at a speed of 1000 r / min. When the temperature of the dispersion is lower t...

Embodiment ３

[0031] Example 3: This embodiment is a method for preparing carbon nanotubes / polyaniline nanoparticles with a negative dielectric constant, which is carried out according to the following steps:

[0032] 1. Preparation of dispersion A: Weigh 0.03 mol of nitric acid, 0.024 mol of potassium dichromate and 15% multi-walled carbon nanotubes, and add them into 300 ml of water. Ultrasonic dispersion for 40 minutes (power 320W) to fully disperse the oxidant, protonic acid and multi-walled carbon nanotubes in water.

[0033] 2. Preparation of dispersion B: 0.036mol aniline (An) dispersed in 60ml of water, An dispersion in ice-water mixture, ultrasonic 60min, power 320W.

[0034] 3. Preparation of carbon nanotubes / polyaniline nanoparticles: the dispersion A was placed in the ice-water mixture contained in the crystallization dish, and the crystallization dish was placed on a magnetic stirrer stirring at a speed of 800 r / min. When the temperature of the dispersion is lower than 10°C, a...

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Abstract

The invention relates to a preparation method of carbon nanotube/polyaniline nanoparticle with negative dielectric constant, comprising: preparing dispersion A and dispersion B, placing dispersion A in an ice-water mixture held in a crystallizing dish, and placing the crystallizing dish on a magnetic stirrer which stirs at a speed of 500-1000 r/min; after temperature of the dispersion A drops to 10 DEG C, and dropwise adding 60 ml of the dispersion B while stirring for 0.1-10 min; in ice bath, standing for 6-12 h; reacting and then standing for 12-48 h; suction filtering and drying to obtain a required product; the carbon nanotube/polyaniline nanoparticle prepared herein is 2.5*105-100 in dielectric constant Epsilon that is negative compared to 7.5-1.6*105 of dielectric constant in carbon nanotube/polyaniline synthesized in the existing method, helping apply polymer composites in the field of metamaterials. The preparation method is also useful in the preparation of nano composite electromagnetic metamaterials.

Description

technical field [0001] The invention relates to a preparation method of carbon nanotube / polyaniline nano particles with negative dielectric constant. Background technique [0002] As a typical conductive polymer, polyaniline has broad application prospects and important application values ​​in the fields of catalysis, capacitors, information storage, secondary batteries, and electromagnetic wave absorption. At present, various protonic acids and oxidants can be used for the in-situ polymerization of carbon nanotubes / polyaniline nanoparticles. For example, salicylic acid, acetic acid, etc. can be used for the protonic acid; However, CNTs / PANI nanoparticles synthesized by these oxidants and protonic acids have a positive dielectric constant ε of 7.5–1.6×10 5 , it is difficult to realize the application in the field of metamaterials. Studies have shown that "perfect invisibility" can be achieved through an appropriate combination of positive permittivity, negative permittivit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K7/24
CPCC08G73/0266C08K7/24C08K2201/011
Inventor 邱军姚秀超寇雪晨
Owner TONGJI UNIV
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