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MXene and carbon nano tube synergistically modified polyurethane anticorrosive paint as well as preparation method and construction process thereof

A technology of synergistic modification and carbon nanotubes, applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problem of ineffective prevention of nano-filler agglomeration and stacking, reduced anti-corrosion performance of coatings, weak interaction, etc. problems, to achieve excellent corrosion resistance and mechanical properties, good mechanical properties and anti-corrosion properties, and the effect of protecting metal

Active Publication Date: 2022-04-05
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both pristine MXene and CNT surfaces are negatively charged, and the random physical mixing of MXene and CNT cannot effectively prevent the agglomeration and stacking of nanofillers, and the interaction force between the two is too weak.
The agglomeration of MXene and CNT not only easily creates holes in the coating, but also provides channels for corrosion factors such as water molecules and chloride ions to enter the coating, which accelerates the corrosion of the substrate and reduces the anti-corrosion performance of the coating.

Method used

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  • MXene and carbon nano tube synergistically modified polyurethane anticorrosive paint as well as preparation method and construction process thereof
  • MXene and carbon nano tube synergistically modified polyurethane anticorrosive paint as well as preparation method and construction process thereof
  • MXene and carbon nano tube synergistically modified polyurethane anticorrosive paint as well as preparation method and construction process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of MXene and carbon nanotube synergistically modified polyurethane anticorrosion coating, comprises the following steps:

[0037] 1) Preparation of MXene nanosheets: Weigh 3 g of titanium aluminum carbide (Ti 3 AlC 2 ), then measure 60ml of hydrofluoric acid (HF) in a polyethylene beaker with a graduated cylinder, place the beaker on a magnetic stirrer, and slowly add Ti 3 AlC 2 , and completed within half an hour; continued magnetic stirring for 12 hours, washed the obtained MXene suspension with distilled water and absolute ethanol until the solution was neutral, and finally dried in vacuum at 45°C for 12 hours to obtain MXene nanosheets.

[0038] 2) Preparation of functionalized MXene nanosheets (A-MXene): under nitrogen protection, the silane coupling agent 3-(2-aminoethylamino)propyltrimethoxysilane (AEAPTMS) was first dispersed in ethanol solution, Stir to dissolve it fully, then add it into the MXene aqueous solution, ultrasonicate...

Embodiment 2

[0048] A kind of preparation method of MXene and carbon nanotube synergistically modified polyurethane anticorrosion coating, comprises the following steps:

[0049] 1) Preparation of MXene nanosheets: Weigh 5 g of titanium aluminum carbide (Ti 3 AlC 2 ), then measure 100ml hydrofluoric acid (HF) in a polyethylene beaker with a graduated cylinder, place the beaker on a magnetic stirrer, and slowly add Ti 3 AlC 2 , and completed within half an hour; continued magnetic stirring for 12 hours, washed the obtained MXene suspension with distilled water and absolute ethanol until the solution was neutral, and finally dried in vacuum at 45°C for 12 hours to obtain MXene nanosheets.

[0050] 2) Preparation of functionalized MXene nanosheets (A-MXene): under nitrogen protection, the silane coupling agent 3-(2-aminoethylamino)propyltrimethoxysilane (AEAPTMS) was first dispersed in ethanol solution, Stir to fully dissolve it, then add it into the MXene aqueous solution, sonicate for 60...

Embodiment 3

[0058] A kind of preparation method of MXene and carbon nanotube synergistically modified polyurethane anticorrosion coating, comprises the following steps:

[0059] 1) Preparation of MXene nanosheets: Weigh 4 g of titanium aluminum carbide (Ti 3 AlC 2 ), then measure 100ml hydrofluoric acid (HF) in a polyethylene beaker with a graduated cylinder, place the beaker on a magnetic stirrer, and slowly add Ti 3 AlC 2 , and completed within half an hour; continued magnetic stirring for 24 hours, washed the obtained MXene suspension with distilled water and absolute ethanol until the solution was neutral, and finally dried in vacuum at 45°C for 24 hours to obtain MXene nanosheets.

[0060] 2) Preparation of functionalized MXene nanosheets (A-MXene): under nitrogen protection, the silane coupling agent 3-(2-aminoethylamino)propyltrimethoxysilane (AEAPTMS) was first dispersed in ethanol solution, Stir to fully dissolve it, add it to the MXene aqueous solution, ultrasonicate for 60 m...

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Abstract

The invention discloses an MXene and carbon nanotube synergistically modified polyurethane anti-corrosion coating as well as a preparation method and a construction process thereof, and relates to the field of anti-corrosion coatings. Comprising the following steps: S1, taking MXene nanosheets, and adding a silane coupling agent for modification to obtain functionalized MXene nanosheets; s2, dispersing the functionalized MXene nanosheets and the aminated carbon nanotubes in deionized water, and carrying out ultrasonic treatment until the functionalized MXene nanosheets and the aminated carbon nanotubes are uniformly dispersed, so as to obtain A-MXene / AMCNT dispersion liquid; and S3, adding the A-MXene / AMCNT dispersion liquid into waterborne polyurethane, and uniformly stirring, so as to obtain the MXene and carbon nanotube synergistically modified polyurethane anticorrosive coating. According to the preparation method disclosed by the invention, the MXene nanosheet can have good compatibility and relatively strong interface interaction with the WPU substrate, so that the MXene and the carbon nanotubes of the coating are uniformly dispersed in the WPU substrate, and the coating has excellent corrosion resistance and mechanical properties.

Description

technical field [0001] The invention belongs to the field of anticorrosion coatings, in particular to polyurethane anticorrosion coatings synergistically modified by MXene and carbon nanotubes, a preparation method and a construction process thereof. Background technique [0002] Metal corrosion is the main hazard in industrial production, and it is also a potential threat to human health. Therefore, certain technologies or methods must be used to prevent or delay the occurrence of corrosion; methods such as cathodic protection, corrosion inhibitor protection, and coating protection are used on metal There are a wide range of applications in the field of anti-corrosion; among them, organic coatings have become a research hotspot because of their high efficiency, simplicity, and ability to cover complex surfaces. [0003] Waterborne polyurethane (WPU) coatings have broad market prospects due to the advantages of non-toxic, safe, non-combustible, and low cost; however, the ant...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/08C09D7/62B05D3/02B05D5/00B05D7/14B05D7/24
Inventor 王玉周马杨豹杜琳琳常文静刘妍
Owner HENAN INST OF ENG
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