Carbon nano super-hydrophobic water-based paint and preparation method thereof

A water-based coating, super-hydrophobic technology, applied in the direction of polyurea/polyurethane coatings, coatings, climate sustainability, etc., can solve problems such as being unsuitable for industrial production and application, increasing coating roughness, and limited super-hydrophobic effect. To achieve the effect of improving hydrophobic performance, increasing roughness, and increasing hydrophobic performance

Active Publication Date: 2022-07-08

新化县中润化学科技有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0005] At present, only graphene or carbon nanotubes are used to dissipate heat, conduct electricity or increase the roughness of the coating

Even if graphene and carbon nanotubes are used together, it is only a physical mixture, and the superh...

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Method used

Therefore, the present invention adopts a kind of carbon nanometer super-hydrophobic water-based paint of above-mentioned structure and preparation method thereof, adopts the hydrophobic property of g...

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Abstract

The invention discloses a carbon nano super-hydrophobic water-based paint and a preparation method thereof, 30-50 parts of GNS/NH2-MWCNT water-based dispersion liquid is taken and added, then 30-40 parts of water-based resin, 1-10 parts of filler, 1-2 parts of anti-settling agent, 0.5-1 part of defoaming agent and 0.5-1 part of wetting agent are added, and stirring is performed at the stirring speed of 100-500 r/min for 0.5-1.5 h to obtain the paint. According to the carbon nano super-hydrophobic water-based paint adopting the structure and the preparation method thereof, the super-hydrophobic performance is realized by adopting the hydrophobic properties of the graphene and the carbon nano tube and a micro-nano structure constructed by the graphene and the carbon nano tube, and the hydrophobic performance is improved without adding other hydrophobic fillers.

Application Domain

Chemical industryPolyurea/polyurethane coatings

Technology Topic

Defoaming AgentsCarbon nanotube +5

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Examples

Experimental program(2)

Example Embodiment

[0033] GNS/NH 2 -The preparation method of MWCNT is:

[0034] S1. Add a certain amount of silane coupling agent with amino group and polyvinylamine into a certain amount of ethanol, stir and disperse evenly to obtain a dispersion;

[0035] S2, adding the above-mentioned dispersion liquid to a certain amount of carboxylated multi-walled carbon nanotubes by spraying, heating and stirring at 80°C, and the reaction time is 5-10min to obtain amino-modified carbon nanotubes;

[0036] S3. Add a certain amount of amino-modified carbon nanotubes to a certain concentration of graphene oxide dispersion, and react at 60-80 °C for 1-2 hours to obtain GO/NH 2 -MWCNT;

[0037] S4. Add a certain amount of HI and continue the reaction at 80°C for 0.5-1h to obtain GNS/NH 2 - complexes of MWCNTs.

[0038] The mass fraction of the amino group-bearing silane coupling agent and polyvinylamine in ethanol is 0.4%-1%, and the mixing speed is 10-50r/min.

[0039] The diameter of the amino-modified carbon nanotubes in S2 is 10-90 nm, the length is 100 nm-2 μm, and the carboxyl group content is 0.5-1.5% by mass.

[0040] The mass concentration of amino-modified carbon nanotubes in S3 is 0.5-2%.

[0041] In S3, the graphene oxide sheet diameter D90 is 8 μm, the number of layers is 1-3, the carbon content is 43-53%, and the graphene oxide dispersion concentration is 0.5%-2%.

[0042] The mass fraction of HI in S4 is 0.5%-5%.

[0043] The water-based resin includes one or more of acrylic resin and its derivatives, chlorosulfonated polyethylene resin and polyurethane resin.

[0044] Take the above GNS/NH 2 -Add 30-50 parts of the aqueous dispersion of MWCNT, then add 30-40 parts of water-based resin, 1-10 parts of filler, 1-2 parts of anti-settling agent, 0.5-1 part of defoamer, and 0.5-1 part of wetting agent The coating is obtained by stirring for 0.5-1.5h at a stirring speed of 100-500r/min.

Example Embodiment

[0045] Example 1

[0046] 1. Preparation of GNS/NH 2 -MWCNT:

[0047] S1. Add 0.4%-1% silane coupling agent with amino group and polyvinylamine into a certain amount of ethanol, and the mixing speed is 10-50r/min, and the dispersion is uniformly obtained by stirring and dispersing;

[0048] S2, adding the above-mentioned dispersion liquid to a certain amount of carboxylated multi-walled carbon nanotubes by spraying, heating and stirring at 80°C, and the reaction time is 5-10min to obtain amino-modified carbon nanotubes;

[0049] S3. Add amino-modified carbon nanotubes with a mass concentration of 0.5-2% into a graphene oxide dispersion with a concentration of 0.5%-2%, and react at 60-80 ° C for 1-2 hours to obtain GO/NH 2 -MWCNT;

[0050]

[0051] S4. Add 0.5%-5% HI by mass, and continue the reaction at 80°C for 0.5-1h to obtain GNS/NH 2 - complexes of MWCNTs.

[0052] 2. Preparation of paint:

[0053] Take the above GNS/NH 2 -MWCNT to prepare GNS/NH 2 -MWCNT aqueous dispersion, take GNS/NH 2 -30-50 parts of MWCNT aqueous dispersion, then add 30-40 parts of water-based resin, 1-10 parts of filler, 1-2 parts of anti-settling agent, 0.5-1 part of defoamer, and 0.5-1 part of wetting agent. The coating is obtained by stirring for 0.5-1.5h at a stirring speed of -500r/min. It is sprayed multiple times during use to achieve the two-dimensional orientation of graphene and amino-modified carbon nanotubes in the coating, and to obtain excellent micro-nano structure.

[0054] Therefore, the present invention adopts a carbon nanometer super-hydrophobic water-based paint of the above structure and a preparation method thereof, adopts the hydrophobic properties of graphene and carbon nanotubes themselves and the micro-nano structures constructed by the two to achieve super-hydrophobic properties, and does not add other hydrophobic properties. fillers to improve hydrophobicity.

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PUM

Property	Measurement	Unit
Diameter	10.0 ~ 90.0	nm
Length	100.0	nm
Film diameter	8.0	µm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Hydraulic-pressure-resistant and anti-freezing/thawing coating for concrete structure and preparation method of hydraulic-pressure-resistant and anti-freezing/thawing coating

ActiveCN110079213AImprove adhesionImprove hydrophobic propertiesCoatingsEmulsionPolyvinyl alcohol

Owner:CHONGQING JINHONG CONSTR ENG

Classification and recommendation of technical efficacy words

Increase roughness
Improve hydrophobic properties

Carbon nano super-hydrophobic water-based paint and preparation method thereof

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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