A kind of preparation method of terpolymer doped polyaniline superhydrophobic composite anticorrosion coating

A technology of terpolymer and anti-corrosion coatings, which is applied in anti-corrosion coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of poor water resistance and anti-corrosion performance, and achieve improved anti-corrosion performance, compatibility and weather resistance performance, solve the effect of poor water resistance and anti-corrosion performance

Active Publication Date: 2021-06-29
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

This method solves the problem of poor water resistance and anti-corrosion performance of the resin matrix itself, and can greatly improve the long-term anti-corrosion performance of metals when used as an anti-corrosion coating

Method used

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  • A kind of preparation method of terpolymer doped polyaniline superhydrophobic composite anticorrosion coating

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preparation example Construction

[0023] A preparation method of a terpolymer-doped polyaniline super-hydrophobic composite anti-corrosion coating of the present invention comprises the following steps:

[0024] 1) In parts by weight, mix 10-20 parts of hydrophilic vinyl monomers and 12-24 parts of fluorine-containing acrylate monomers in 20-40 parts of N,N-dimethylformamide and heat up to After stirring at 80-90°C for 1-2 hours, a uniformly mixed mixed solution A was obtained.

[0025] 2) Add 0.4-0.8 parts of an oil-soluble initiator to the mixed solution A, and react at 80-90° C. for 0.5-2 hours to obtain component B.

[0026] 3) Add the third monomer, 0.1-0.5 part of functional acrylic monomer or 0.2-1 part of long-chain acrylate monomer dropwise into component B and continue to react for 3-4 hours to obtain fluorine-containing terpolymer Surfactant.

[0027] 4) 2.5-3.5 parts of fluorine-containing terpolymer surfactant, 4-4.8 parts of aniline monomer, and 40-60 parts of water are uniformly mixed and reac...

Embodiment 1

[0039] 1) In parts by weight, 10 parts of 2-acrylamide-2-methylpropanesulfonic acid and 12 parts of trifluoroethyl acrylate were mixed in 20 parts of N,N-dimethylformamide, and the temperature was raised to 80°C and stirred. After 1 h, a uniformly mixed mixed solution A was obtained.

[0040] 2) Add 0.4 part of benzoyl peroxide to mixed solution A, and react at 80° C. for 0.5 h to obtain component B.

[0041] 3) The third monomer, 0.1 part of glycidyl acrylate, was added dropwise to component B, and the reaction was continued for 3 hours to obtain a fluorine-containing terpolymer surfactant.

[0042] 4) 2.5 parts of fluorine-containing terpolymer surfactant, 4 parts of aniline monomer, and 40 parts of water are uniformly mixed and reacted at room temperature for 1 hour to obtain a milky white mixed solution C.

[0043] 5) Slowly add 9.8 parts of an aqueous solution of ferric chloride into the mixed solution C dropwise, continue to react for 12 hours, filter, wash and dry to o...

Embodiment 2

[0046] 1) In parts by weight, mix 20 parts of 2-methacrylamide dodecyl sulfonic acid and 24 parts of hexafluorobutyl acrylate in 40 parts of N,N-dimethylformamide and heat up to 90°C and stir After 2h, a uniformly mixed mixture A was obtained.

[0047] 2) Add 0.8 parts of azobisisoheptanonitrile to the mixture A, and react at 90°C for 2 hours to obtain component B.

[0048] 3) The third monomer, 1 part of n-octyl acrylate, was added dropwise into component B to continue the reaction for 4 hours to prepare a fluorine-containing terpolymer surfactant.

[0049] 4) 3.5 parts of fluorine-containing terpolymer surfactant, 4.8 parts of aniline monomer, and 60 parts of water were uniformly mixed and reacted at room temperature for 2 hours to obtain a milky white mixture C.

[0050] 5) Slowly add 11.8 parts of an aqueous solution of potassium dichromate dropwise to the mixed solution C, continue to react for 24 hours, then filter, wash and dry to obtain superhydrophobic polyaniline. ...

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Abstract

The invention discloses a preparation method of a terpolymer-doped polyaniline superhydrophobic composite anticorrosion coating. First, the solution polymerization method is used to stir the hydrophilic vinyl monomer, fluorine-containing acrylate monomer and oil-soluble initiator in the solvent and react for a period of time, and then add functional acrylic monomer or long-chain acrylate The monomer is used as the third monomer to continue to react for a period of time to obtain a fluorine-containing terpolymer surfactant. Then, the fluorine-containing terpolymer surfactant is uniformly mixed with aniline monomer and an oxidizing agent and reacted for a period of time to obtain superhydrophobic polyaniline. Finally, the prepared superhydrophobic polyaniline is uniformly dispersed in the resin matrix to obtain a polyaniline superhydrophobic composite anticorrosion coating with excellent anticorrosion performance. The invention solves the problems of poor water resistance and anti-corrosion performance of the resin matrix itself, and can greatly improve the long-term anti-corrosion performance of metals when used as an anti-corrosion coating.

Description

technical field [0001] The invention belongs to the field of anti-corrosion coatings, in particular to a preparation method of a terpolymer-doped polyaniline super-hydrophobic composite anti-corrosion coating. Background technique [0002] Metal corrosion has caused huge losses to science and technology and economic construction. Applying organic coatings on the surface of metal substrates is one of the common strategies for metal corrosion protection. However, the anti-corrosion performance of the resin matrix itself can no longer meet the needs of anti-corrosion. Therefore, the corrosion resistance of the resin matrix is ​​often improved by adding corrosion inhibitors. Polyaniline can not only provide a physical barrier for anti-corrosion coatings, but also provide electrochemical protection for metals, and is often used as a corrosion inhibitor compounded with a resin matrix. The hydrophobic or super-hydrophobic coating has good water resistance and can effectively prev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/08C09D133/04C09D163/00C09D5/08C08G73/02C08F220/24C08F220/58C08F220/32
CPCC09D167/08C09D133/04C09D163/00C09D5/08C08F220/24C08F220/58C08G73/0266C08F220/585C08L79/02C08L33/16C08L33/14C09D4/00C08F2/08C08F220/325C08F220/1808C08F220/1818C08F2/04C08F220/22C08F220/32C08F220/56C08G2150/90C08K5/14C08K5/23C09D5/084
Inventor 王海花孙立宇费贵强马永宁李焱宇
Owner SHAANXI UNIV OF SCI & TECH
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