Composite nano-coating material with hydrophobic and anticorrosive performances, and preparation method and application thereof

A nano-coating, hydrophobic technology, used in anti-corrosion coatings, coatings, epoxy coatings, etc., can solve the problems of poor mechanical properties, large amount of fillers, poor anti-corrosion effect, etc., to improve water vapor resistance and anti-corrosion performance. , the effect of enhancing dispersion

Inactive Publication Date: 2019-09-06
CHONGQING ACADEMY OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods all have problems such as large amount of filler, poor anti-corrosion effect, and poor mechanical properties to varying degrees.

Method used

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  • Composite nano-coating material with hydrophobic and anticorrosive performances, and preparation method and application thereof
  • Composite nano-coating material with hydrophobic and anticorrosive performances, and preparation method and application thereof
  • Composite nano-coating material with hydrophobic and anticorrosive performances, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052]Example 1, weigh 200 mg of graphene oxide powder and place it in 200 ml of absolute ethanol solvent, and ultrasonically disperse for 2 hours to obtain a reaction solution. Add 1.0 g of tetraethyl silicate and 0.5 g of heptadecylfluorodecyltrimethoxysilane to the reaction solution, and at the same time add 2 to 3 drops of acetic acid as a catalyst, and stir for 24 hours at a temperature of 60 ° C and a rotation speed of 500 rpm. hours, the nanoparticle-modified graphene dispersion was obtained. Then the product was separated by suction filtration, and washed three times with acetone and deionized water respectively. Then add 2.0g perfluorooctyltriethoxysilane to the product for hydrophobic modification, react at 80°C for 24 hours, and dry the product obtained after the reaction at 60°C for 12 hours to obtain modified hydrophobic nanoparticles Graphene oxide.

[0053] For morphology observation, see figure 1 , hydrophobic silica nanoparticles coated on the surface of sh...

Embodiment 2

[0056] Example 2: 300 mg of graphene oxide powder was weighed and placed in 200 ml of sodium hydroxide aqueous solution, 0.05 g of ammonia water was added, and stirred at room temperature at 200 rpm for 2 hours to obtain a reaction solution. Add 2.0 g of isopropyl dioleic acid acyloxy (dioctyl phosphate acyloxy) titanate and 1.0 g of trimethylfluorosilane to the reaction solution, and mechanically stir for 5 hours at room temperature at 200 rpm to obtain nano Particle modified graphene dispersion. The product was then isolated by suction filtration and washed 3 times with deionized water. Then, 3.0 g of glycerol tristearate was added to the product for hydrophobic modification, reacted for 72 hours at a temperature of 40-60° C., and the product was freeze-dried for 12 hours to obtain hydrophobic nanoparticle-modified graphene oxide.

[0057] Weigh 100 mg of the prepared hydrophobic nanoparticle-modified graphene oxide, mix it with 100 g of polysiloxane resin, and 20 g of epox...

Embodiment 3

[0059] Example 3, 50 mg of graphene oxide powder was weighed and placed in a mixed solvent composed of 100 ml of water, 50 ml of ethanol, and 30 ml of isopropanol, 0.05 g of dispersant was added, and stirred at 500 rpm for 2 hours. Transfer the uniformly dispersed mixed solution to a 500mL three-necked flask equipped with a mechanical stirrer, a reflux condenser, and a constant pressure dropping funnel, add 1.0 g of triisopropyl aluminate to the mixed solution, and add 3 mg of sodium ethylate as a catalyst. The temperature was 40° C., and the rotation speed was 1000 rpm under the conditions of mechanical stirring for 20 hours to obtain a nanoparticle-modified graphene dispersion. The product was then isolated by suction filtration and washed 3 times with deionized water. Then, 1.0 g of stearic acid was added to the product for hydrophobic modification, and the reaction was carried out at a temperature of 150° C. for 12 hours. The product was suction-filtered and freeze-dried f...

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Abstract

The invention provides a composite nano-coating material with hydrophobic and anticorrosive performances, and a preparation method and an application thereof. An in-situ chemical modification technique is adopted to graft the surface of graphene oxide with hydrophobic nanoparticles, and the surface of the graphene oxide sheet is coated with the hydrophobic nanoparticles to form a hierarchical structure in order to enhance the dispersibility, the hydrophobicity and water vapor barrier effect of the graphene oxide, so the water vapor resistance and the corrosion resistance of a coating are greatly improved; and the hydrophobic nanoparticle modified graphene oxide, silicone resin, a solvent, non-essential blending resin, a non-essential curing agent, a non-essential pigment filler and a non-essential coating additive are blended, and the obtained mixture is cured at -30-300 DEG C to form a film in order to obtain the composite nano-coating material with hydrophobic and anticorrosive performances. The composite nano-coating material can improve the hydrophobic and anticorrosive performances of a coating and avoid the corrosion failure of a substrate, and the preparation method has theadvantages of simple process flow, simple and easily available raw materials, and strong practicability.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a composite nano-coating material with hydrophobic and anti-corrosion properties and its preparation method and application. Background technique [0002] Metal corrosion has always been a huge problem in industry. According to statistics, due to metal corrosion, the world's annual waste of resources accounts for one-fifth of the annual utilization rate, which is several times the sum of economic losses caused by various natural disasters. With the development of the economy and the improvement of people's living standards, people's demand for metal materials is increasing day by day, and the emphasis on metal anti-corrosion is also increasing day by day. The surface coatings of building materials, automobiles, marine facilities, instruments and equipment are easily corroded by water vapor and salt spray during use and transportation, resulting in metal corrosion, affecting the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D163/00C09D163/10C09D127/16C09D5/08C09D7/20C09D7/63C09D7/61
CPCC09D5/08C09D183/04C09D7/20C09D7/61C09D7/63C08L63/00C08K13/06C08K9/10C08K3/042C08K5/544C08L63/10C08K3/36C08L27/16
Inventor 李滨游波程鹏秦建波王玉
Owner CHONGQING ACADEMY OF SCI & TECH
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