A conductive polymer polyaniline/manganese trioxide composite coating with strong adhesion and its preparation method

A technology of manganese trioxide and conductive polymers, which is applied in coatings, metal material coating processes, anti-corrosion coatings, etc., and can solve problems such as lack of adhesion, less conductive polyaniline film materials, and poor adhesion of coatings to substrates, etc. problems, to achieve the effect of intact film layer, good anti-corrosion performance and good bonding performance

Active Publication Date: 2017-04-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But on the one hand Araujo etc. think that undoped PANi does not have anti-corrosion property in essence, and its reason is attributed to two points: the one, the porosity of PANi film, the 2nd, this coating is very poor to the adhesion of substrate; On the other hand, many studies have shown that adding inorganic particles to conductive polymer coating materials can significantly improve the anti-corrosion performance of the coating, such as SiO 2 , ZrO 2 、TiO 2 etc., while adding porous spherical Mn to the coating material 2 o 3 Research on methods for preparing anti-corrosion coatings is almost non-existent
At present, the pure polyaniline film coating materials prepared by chemical synthesis or electrochemical synthesis have the problem of lack of adhesion, so the preparation method and shape of the material have a great impact on the performance of the material; Adding inorganic particles in the coating can significantly improve the anti-corrosion performance of the coating, so it is necessary to develop a new preparation method and study the influence of the preparation method on the relevant properties of the material
Based on the above facts and the strong adhesion of conductive polyaniline film materials with anti-corrosion application prospects, there are few reports

Method used

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  • A conductive polymer polyaniline/manganese trioxide composite coating with strong adhesion and its preparation method
  • A conductive polymer polyaniline/manganese trioxide composite coating with strong adhesion and its preparation method
  • A conductive polymer polyaniline/manganese trioxide composite coating with strong adhesion and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the conductive polymer polyaniline / manganese trioxide composite coating with strong adhesion includes the growth of zinc oxide nanorods and the preparation of the composite coating. The specific process is as follows:

[0028] Prepare raw material spherical manganese trioxide for later use: Weigh 12.25 g of manganese acetate, 9.16 g of urea (manganese acetate: urea = 1:3) and 5 g of PEG-500, dissolve them in 110 ml of ethylene glycol, and The solution was transferred to a hydrothermal reactor, reacted at a temperature of 200 °C for 20 h, and then cooled naturally. Then the product was washed and then calcined at 500°C for 8 h to obtain Mn 2 o 3Micro-nano hollow spheres (see figure 2 ).

[0029] Preparation of raw polyaniline for later use: First, take 1~5ml of aniline monomer and put it in a beaker, add 50~90ml of 1mol / L hydrochloric acid solution and mix well for later use; then take 1~10g of ammonium persulfate as an oxidant, add 50~100ml...

Embodiment 2

[0033] The first step, ZnO nanorod growth: take a clean beaker, add 1~20 ml 0.2 mol / L Zn(Ac) into it 2 , and 1~20 ml 0.4 mol / L NaCl, and add deionized water to dilute. The Zn sheet with the passivation layer removed and the surface-treated carbon steel sheet are coupled with a wire and put into the electrolyte. React at a temperature of 80° C. for 3 hours, at which point the nano zinc oxide rods have covered the surface of the carbon steel.

[0034] The second step, the preparation of the composite coating: weigh 0.1 g of polyaniline into a transparent vial, and weigh 0.003 g of the aforementioned Mn 2 o 3 Put in a bottle and add a stir bar. Add 2 ml of nitrogen-methylpyrrolidone into the vial, use an ultrasonic instrument to ultrasonically oscillate for 0.5 h, then magnetically stir at room temperature for 24 h, and then ultrasonically oscillate for 0.5 h. At this time, polyaniline and Mn 2 o 3 The particles are uniformly mixed to obtain a polyaniline nanocomposite coat...

Embodiment 3

[0036] The first step, ZnO nanorod growth: take a clean beaker, add 1~20 ml 0.2 mol / L Zn(Ac) into it 2 , and 1~20 ml 0.4 mol / L NaCl, and add deionized water to dilute. The Zn sheet with the passivation layer removed and the surface-treated carbon steel sheet are coupled with a wire and put into the electrolyte. React at a temperature of 80° C. for 3 hours, at which point the nano zinc oxide rods have covered the surface of the carbon steel.

[0037] The second step, the preparation of the composite coating: weigh 0.1 g of polyaniline into a transparent vial, and weigh 0.007 g of the aforementioned Mn 2 o 3 Put in a bottle and add a stir bar. Add 2 ml of nitrogen-methylpyrrolidone into the vial, use an ultrasonic instrument to ultrasonically oscillate for 0.5 h, then magnetically stir at room temperature for 24 h, and then ultrasonically oscillate for 0.5 h. At this time, polyaniline and Mn 2 o 3 The particles are uniformly mixed to obtain a polyaniline nanocomposite coat...

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Abstract

The invention relates to a novel preparation method of a conductive polymeric material polyaniline and preparation of its composite material, belonging to the field of material synthesis and high performance anticorrosion materials. The conducting polymer polyaniline/manganic oxide composite coating having strong adhesiveness is prepared by growing zinc oxide nanorod on a metal matrix, then coating a polyaniline/manganic oxide composite coating on the metal matrix to embed the film in the zinc oxide nanorod, wherein the polyaniline/manganic oxide composite coating is prepared by mixing polyaniline with spherical manganic oxide according to the weight ratio of 99:1-90:10; putting the mixed material in N-methyl pyrrolidone solution, conducting ultrasonic vibration, and conducting magnetic stirring reaction for 6-48h. According to the invention, the prepared material can obviously improve the corrosion resistance of the metal matrix, compared with a bare carbon steel, the corrosion rate is reduced 25 times, and the anticorrosion performance is excellent. The method has the advantages of novel method, simple operation, low cost, and low energy consumption, and is suitable for practical application and large scale production.

Description

technical field [0001] The invention relates to a novel preparation method of polyaniline, a conductive polymer material, and the preparation of a composite material thereof, and belongs to the field of material synthesis and the invention and application of high-performance anti-corrosion materials. Background technique [0002] The economic losses caused by metal corrosion every year in the world are immeasurable, and there are countless safety accidents caused by it. Metal corrosion protection is very critical. At present, cathodic protection, anodic protection, addition of corrosion inhibitors, metal surface modification and coating anti-corrosion methods are mainly used. Coating anticorrosion has a wide range of applications and low cost, and is an important branch of corrosion science. Organic coating anti-corrosion is to apply corrosion-resistant organic coating on the metal surface. After curing to form a film, it has three functions of shielding, corrosion inhibiti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/02C09D5/08C23C20/08
Inventor 刘贵昌刘洋王立达王随林武婷婷刘士强
Owner DALIAN UNIV OF TECH
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