A polythiophene composite metal anti-corrosion coating influenced by morphology, preparation method and application thereof

A composite metal and anti-corrosion coating technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of difficult control of stability and repeatability, inability to synthesize on a large scale, insufficient stability of performance, etc., and achieve excellent environmental and chemical stability, excellent Effect of metal anticorrosion performance and high redox potential

Active Publication Date: 2017-10-27
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the preparation method of this composite anti-corrosion coating is electrochemical polymerization, so its stability and repeatability are not easy to control, and it cannot be synthesized on a large scale, which greatly limits its practical application.
[0005] Although the research on anti-corrosion performance of conductive polyaniline is relatively extensive and mature, polyaniline has a variety of chemical transition structures, some of which have certain toxicity and acid sensitivity, which lead to its unstable performance.

Method used

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  • A polythiophene composite metal anti-corrosion coating influenced by morphology, preparation method and application thereof
  • A polythiophene composite metal anti-corrosion coating influenced by morphology, preparation method and application thereof
  • A polythiophene composite metal anti-corrosion coating influenced by morphology, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Preparation of "Pear Shaped" Nanoparticles of Poly(3,4-Dioxyethyl)thiophene:

[0058] 1) Dissolve polyvinylpyrrolidone in water and acetonitrile mixed solution with a volume ratio of 4:1, stir evenly, and prepare a water / acetonitrile mixed solution of polyvinylpyrrolidone with a concentration of 0.05mmol / L;

[0059] 2) Add 0.2mL monomeric (3,4-dioxyethyl)thiophene to the above solution, and sonicate for 0.5h to obtain a uniformly dispersed mixed solution;

[0060] 3) Add a certain volume of ammonium persulfate aqueous solution to the above solution, wherein the molar ratio of ammonium persulfate to monomer (3,4-dioxyethyl)thiophene (EDOT) is 2:1, forming a total volume of 100mL The polymerization system was continuously stirred, and the chemical polymerization reaction was carried out at room temperature for 48 hours to obtain a black mixed solution of "pear-shaped" nanoparticles containing poly(3,4-dioxyethyl)thiophene;

[0061] 4) Centrifuge the above black mixed sol...

Embodiment 2

[0068] Preparation of composite nanofibers of poly(3,4-dioxyethyl)thiophene and multi-walled carbon nanotubes:

[0069] 1) Dissolve polyvinylpyrrolidone in water and acetonitrile mixed solution with a volume ratio of 4:1, and stir evenly to obtain a water / acetonitrile mixed solution of polyvinylpyrrolidone with a concentration of 1 mmol / L;

[0070] 2) adding 0.0162 g of multi-walled carbon nanotubes to the above solution, and ultrasonically dispersing for 1 hour to obtain a suspension containing multi-walled carbon nanotubes;

[0071] 3) Add 0.32 mL monomer (3,4-dioxyethyl) thiophene to the above solution, and sonicate for 2 hours to obtain a uniformly dispersed mixed solution;

[0072] 4) Add a certain volume of ammonium persulfate aqueous solution to the above solution, wherein the molar ratio of ammonium persulfate to monomer EDOT is 2:1 to form a polymerization system with a total volume of 100mL, keep stirring, and carry out chemical polymerization reaction at room temper...

Embodiment 3

[0080] Preparation of composite nanofibers of poly(3,4-dioxyethyl)thiophene and single-walled carbon nanotubes:

[0081] 1) Dissolve polyvinylpyrrolidone in water and acetonitrile mixed solution with a volume ratio of 4:1, and stir evenly to obtain a water / acetonitrile mixed solution of polyvinylpyrrolidone with a concentration of 1 mmol / L;

[0082] 2) Add 0.0162 g of single-walled carbon nanotubes to the above solution, and ultrasonically disperse for 1 hour to obtain a suspension containing multi-walled carbon nanotubes;

[0083] 3) Add 0.32 mL monomer (3,4-dioxyethyl) thiophene to the above solution, and sonicate for 2 hours to obtain a uniformly dispersed mixed solution;

[0084]4) Add a certain volume of ammonium persulfate aqueous solution to the above solution, wherein the molar ratio of ammonium persulfate to monomer EDOT is 2:1 to form a polymerization system with a total volume of 100mL, keep stirring, and carry out chemical polymerization reaction at room temperatur...

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Abstract

The invention discloses a shape-affected polythiophene composite metal anticorrosion coating as well as a preparation method and application thereof. The composition and content of the composite anticorrosion coating of the present invention are: "pear-shaped" nanoparticles of poly(3,4-dioxyethyl)thiophene or a composite of poly(3,4-dioxyethyl)thiophene and carbon nanotubes Nanofiber: 15~110mg; polyvinyl butyral ethanol solution: 1~3mL; absolute ethanol 1~3mL. In the present invention, the "pear-shaped" nanoparticles of poly(3,4-dioxyethyl)thiophene or composite nanofibers of poly(3,4-dioxyethyl)thiophene and carbon nanotubes are firstly prepared by emulsion polymerization , and then mix it with polyvinyl butyral ethanol solution and absolute ethanol to prepare conductive composite metal anticorrosion coating and apply it to metal iron anticorrosion. The coating of the invention has low cost, little environmental pollution and good comprehensive performance. In addition, the selected scanning Kelvin probe test technology avoids damage to the coating, and can effectively monitor the corrosion resistance of the coating to the metal.

Description

technical field [0001] The invention relates to the field of metal anticorrosion materials. More specifically, it relates to a shape-affected polythiophene composite metal anti-corrosion coating and its preparation and application. Background technique [0002] Metal materials have an irreplaceable important position in the civil and national defense fields, and metal corrosion has brought huge economic losses and environmental hazards to social development. Therefore, solving this problem has become one of the important goals of scientific and technological development, and the development of new, Metal anti-corrosion materials with excellent performance are the key to solve this problem. Usually, coating a layer of organic anti-corrosion material on the metal surface is an effective means of metal anti-corrosion, because the organic coating on the metal surface acts as an obstacle, which can prevent moisture, oxygen and ions from entering the metal interface to a certain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D165/00C09D129/14C09D5/08C09D7/12C08G61/12C08K7/24
Inventor 胡秀杰白晓霞严峻孙兴明周树云陈萍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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