Preparation method of doped polyaniline nano particles

A technology of nanoparticles and polyaniline, which is applied in the field of preparation of polyaniline nanoparticles, can solve the problems that the morphology and electromagnetic parameters of polyaniline cannot be fully controlled, and achieve the effects of enhancing electromagnetic wave absorption performance, realizing impedance matching, and optimizing electromagnetic parameters

Inactive Publication Date: 2014-12-03
HARBIN INST OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The present invention aims to solve the problem that the existing method adopts surfactant as a shape stabilizer, and only changing the method of doping acid cannot completely regulate the shape and electromagnetic parameters of polyaniline, and provides a kind of doped polyaniline nano-particles preparation method

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  • Preparation method of doped polyaniline nano particles
  • Preparation method of doped polyaniline nano particles
  • Preparation method of doped polyaniline nano particles

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specific Embodiment approach 1

[0022] Specific embodiment one: the preparation method of a kind of doped state polyaniline nano-particle of this embodiment is carried out according to the following steps:

[0023] 1. Preparation of solution A: Dissolve aniline monomer in an aqueous solution of inorganic acid with a concentration of 0.1mol / L to 1mol / L, stir evenly, and place it in an environment of 0°C to 5°C at a constant temperature to obtain solution A; The concentration of aniline monomer in the solution A is 0.1mol / L~5mol / L;

[0024]2. Preparation of solution B: Add ammonium persulfate and surfactant to an aqueous inorganic acid solution with a concentration of 0.01mol / L to 0.1mol / L, stir evenly, and place it in an environment of 0°C to 5°C to obtain a solution B; wherein the concentration of ammonium persulfate in the solution B is 0.1mol / L~6mol / L, and the quality and concentration of the surfactant are the volume of the inorganic acid aqueous solution of 0.01mol / L~0.1mol / L The ratio is (1~5)g:100mL; ...

specific Embodiment approach 2

[0030] Embodiment 2: This embodiment differs from Embodiment 1 in that the inorganic acid in the aqueous inorganic acid solution with a concentration of 0.1 mol / L-1 mol / L described in step 1 is sulfuric acid or hydrochloric acid. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the inorganic acid in the aqueous inorganic acid solution with a concentration of 0.01 mol / L-0.1 mol / L described in step 2 is sulfuric acid or hydrochloric acid. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of doped polyaniline nano particles, relates to the preparation method of polyaniline nano particles, and aims at solving the problems that a surfactant is adopted as a morphology stabilizer in the existing method, and the polyaniline morphology and electromagnetic parameters cannot be completely controlled just by changing the acid doping method. The preparation method comprises the steps of 1, preparing solution A; 2, preparing solution B; 3, preparing the polyaniline nano particles; and 4, carrying out ultrasonic dispersion and centrifugation, so as to obtain the doped polyaniline nano particles. The method has the following advantages: 1, the complex dielectric constant epsilon of the doped polyaniline nano particles prepared by the preparation method is 10-35; compared with the situation that the complex dielectric constant epsilon of the polyaniline synthetized by the existing method is 50-150000, the complex dielectric constant is reduced by 400% to 2*10<6>%; and impedance matching and enhancement of electromagnetic wave absorption performance are facilitated; and 2, the polyaniline nano particles prepared by the preparation method are of capsule shapes and even in grain size. The preparation method disclosed by the invention can be used for preparing the doped polyaniline nano particles.

Description

technical field [0001] The invention relates to a preparation method of polyaniline nanoparticles. 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, there are many synthesis methods for polyaniline: chemical polymerization, electrochemical polymerization, emulsion polymerization, microemulsion polymerization, interfacial polymerization, etc. However, the polyaniline synthesized by these methods has a high complex dielectric constant, complex The dielectric constant ε is 50 to 150,000, and it is difficult to achieve impedance matching, which limits the potential application in the field of electromagnetic wave absorption. Studies have shown that reasonable adjustment of the morphology of polyaniline can effectively adjust the dielectric constant, which imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L79/02C08G73/02
Inventor 杜耘辰张鹏韩喜江
Owner HARBIN INST OF TECH
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