Self-healable graphene composite material for anticorrosion coating and preparation method of composite material

A technology of anti-corrosion coatings and composite materials, applied in anti-corrosion coatings, coatings, etc., can solve the problems of lack of self-healing ability, processing, and surface functionality of anti-corrosion materials, so as to improve stability, reduce holes, and improve stability Good results

Active Publication Date: 2019-03-19
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the defects of the above-mentioned prior art, the present invention provides a self-healing graphene composite material for anti-corrosion coating, which solves the problem that the existing anti-corrosion materials cannot be processed for surface function and lack self-healing ability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Mixing and stirring: Mix graphene oxide with a mass ratio of 1% polydimethylsiloxane and polydimethylsiloxane (the mass ratio of prepolymer to crosslinking agent is 10:1), Stir for 30 minutes until the two are well mixed.

[0018] (2) Dilution and stirring: the mixture was placed in a vacuum drying box for 2 hours, then injected into toluene with a mass of 3 times the polydimethylsiloxane for dilution, and a precursor liquid was obtained after magnetic stirring for 1 hour.

[0019] (3) Vacuum degassing and solidification: using 2 mm thick Mg-9Al-1Zn magnesium alloy as the base, pour the precursor liquid on the magnesium alloy, spread the precursor liquid under the action of gravity, and then solidify in a vacuum drying box, The graphene composite material can be prepared at a temperature of 150 degrees Celsius and a time of 1 hour. The dynamic polarization curve was measured in 3.5%NaCl solution, and the corrosion potential Ecorr of magnesium alloy substrate was -1...

Embodiment 2

[0021] (1) Mixing and stirring: Mix graphene oxide with a mass ratio of polydimethylsiloxane of 5% and polydimethylsiloxane (the mass ratio of prepolymer to crosslinking agent is 10:1), Stir for 60 minutes until the two are well mixed.

[0022] (2) Dilution and stirring: The mixture was placed in a vacuum drying box and allowed to stand for 3 hours, then benzene with 3 times the mass of polydimethylsiloxane was injected for dilution, and a precursor liquid was obtained after magnetic stirring for 1 hour.

[0023] (3) Vacuum degassing and solidification: using 2 mm thick Mg-9Al-1Zn magnesium alloy as the base, pour the precursor liquid on the magnesium alloy, spread the precursor liquid under the action of gravity, and then solidify in a vacuum drying box, The graphene composite material can be prepared at a temperature of 150 degrees Celsius and a time of 1 hour. The dynamic polarization curve was measured in 3.5%NaCl solution, and the corrosion potential Ecorr of magnesium a...

Embodiment 3

[0025] (1) Mixing and stirring: Mix graphene oxide with a mass ratio of polydimethylsiloxane of 8% and polydimethylsiloxane (the mass ratio of prepolymer to crosslinking agent is 10:1), Stir for 30 minutes until the two are well mixed.

[0026] (2) Dilution and stirring: The mixture was placed in a vacuum drying box and allowed to stand for 0.5 hours, then injected into chloroform with twice the mass of polydimethylsiloxane for dilution, and the precursor liquid was obtained after magnetic stirring for 2 hours.

[0027] (3) Vacuum degassing and solidification: using 2 mm thick Mg-9Al-1Zn magnesium alloy as the base, pour the precursor liquid on the magnesium alloy, spread the precursor liquid under the action of gravity, and then solidify in a vacuum drying box, The graphene composite material can be prepared at a temperature of 80 degrees Celsius and a time of 6 hours. The dynamic polarization curve was measured in 3.5%NaCl solution, and the corrosion potential Ecorr of magn...

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Abstract

The invention discloses a self-healable graphene composite material for an anticorrosion coating. The self-healable graphene composite material comprises graphene oxide and polydimethylsiloxane, the graphene oxide accounts for 1-20% of the weight of the polydimethylsiloxane. The invention further discloses a preparation method of the self-healable graphene composite material for the anticorrosioncoating. The preparation method includes the steps: uniformly stirring and mixing the graphene oxide and the polydimethylsiloxane; placing mixture into a vacuum drying chamber, performing standing for0.5 hour or more, injecting organic solvents accounting for 1-6 times of the polydimethylsiloxane, and diluting and stirring the mixture to obtain precursor liquid; pouring the precursor liquid to the surface of a substrate, spreading the precursor liquid on the surface of the substrate and performing vacuum drying to obtain the self-healable graphene composite material. The material is good in plasticity, flexibility and stability, can be subjected to surface processing and has self-healing ability. The method is simple in process and suitable for batch production.

Description

technical field [0001] The invention relates to a graphene composite material and a preparation method thereof, in particular to a self-healable graphene composite material for anti-corrosion coating and a preparation method thereof. Background technique [0002] Magnesium alloys have low density, high specific strength, good machinability, and easy recycling. They have great potential as product shells. However, the biggest problem facing magnesium alloys is their poor corrosion resistance in outdoor environments. The preparation of anti-corrosion coatings on the surface of magnesium alloys is an effective method to improve its corrosion resistance. However, the traditional coating materials are not tightly combined with the substrate, which is easy to damage and fall off, and it is difficult to build an ideal multi-level rough structure through subsequent processing. Therefore, it usually only has anti-corrosion function and has a narrow application range. However, if fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D7/65
CPCC09D5/08C09D7/65
Inventor 于照鹏宋云云董利明赵明磊李佳倩姚嘉左克生姜巍
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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