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Preparation method of epoxy resin/GO super-hydrophobic anticorrosive coating

A technology of epoxy resin and anti-corrosion coating, which is applied in epoxy resin coatings, anti-corrosion coatings, coatings and other directions, can solve problems such as difficulty in meeting, and achieve the effect of improving anti-corrosion performance

Active Publication Date: 2021-02-26
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to meet various problems encountered in actual production and life by only adopting a single strategy.

Method used

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  • Preparation method of epoxy resin/GO super-hydrophobic anticorrosive coating
  • Preparation method of epoxy resin/GO super-hydrophobic anticorrosive coating
  • Preparation method of epoxy resin/GO super-hydrophobic anticorrosive coating

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Experimental program
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Embodiment 1

[0033] The present invention proposes a preparation method of epoxy resin / GO superhydrophobic anti-corrosion coating, the method steps are as follows:

[0034] S1. Preparation of GO-Fe 3 o 4 Nanoparticles: a certain quality of polyvinylpyrrolidone (PVP), 5.213g ferrous chloride tetrahydrate (FeCl 2 4H 2 O), ammonia water was uniformly dissolved in 100 mL of distilled water, and after stirring at a low speed for 30 min, 6.611 g of graphene oxide (GO) aqueous dispersion was added, and the hydrothermal reaction was carried out at 100° C. for 5.0 h. After washing with distilled water and ethanol three times and freeze-drying, GO-Fe 3 o 4 Nanoparticles.

[0035] S2, GO-Fe 3 o 4 Amination of nanoparticles: 2.513g GO-Fe 3 o 4 Nanoparticles were dispersed into 100mL of ethanol-water mixed solution, ultrasonically dispersed for 30min, then 5.012g of γ-aminopropyltriethoxysilane (KH550) was added, and stirred at a medium speed at 50°C for 5.0h. After washing with water and eth...

Embodiment 2

[0040] The implementation method steps in this embodiment are the same as those in Embodiment 1. However, the technical parameters are different. The difference between the two is that in S4, a 240mT magnet is suspended at 3cm from the coating surface during the film formation process.

Embodiment 3

[0042] The implementation method steps in this embodiment are the same as those in Embodiment 1. However, the technical parameters are different. The difference between the two is that in S4, a 240mT magnet is suspended at 4cm from the coating surface during the film formation process.

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Abstract

The invention discloses a preparation method of an epoxy resin / GO super-hydrophobic anticorrosive coating. The method comprises the following steps: s1, preparing GO-Fe3O4 nanoparticles by using a hydrothermal method; s2, carrying out amination of the GO-Fe3O4 nano particles; s3, carrying out fluorination modification on the diethylenetriamine curing agent; s4, preparing a magnetic induction epoxyresin / GO composite coating; and s5, performing hydrophobization modification. Herein, the GO-Fe3O4 nanoparticles are loaded on the surface of GO, wherein the nanoparticles directionally move towardsthe surface of the coating through an external magnetic field in the film forming process, a rough surface structure is formed, hydrophobic modification is conducted on the surface of the rough surface structure through a modifier, the composite coating has super-hydrophobicity, and the static water contact angle reaches 154.96 degrees. The prepared super-hydrophobic anticorrosive coating has an in-layer gradual change structure, so that the coating base material is hydrophobic while the surface of same has super-hydrophobic characteristic and in-layer graphene oxide particles are arranged ina gradual change density manner, so that the coating has a graphene oxide shielding effect and a dual anticorrosive effect brought by surface super-hydrophobicity.

Description

technical field [0001] The invention relates to the field of preparation of composite coating materials, in particular to a preparation method of an epoxy resin / GO superhydrophobic anti-corrosion coating. Background technique [0002] According to statistics in the past 50 years, the economic loss caused by corrosion accounts for an average of 3%-4% of the GDP of each country, and the global corrosion cost is estimated to be 2.5 trillion US dollars, accounting for 3.4% of the global GDP. In order to avoid the economic loss caused by metal corrosion, organic coatings are widely applied to metal substrates as one of the most effective corrosion methods. The function of the coating is mainly a physical barrier: to separate the metal substrate from the external environment, thereby avoiding the interaction between the metal and the corrosive medium existing in the surrounding environment. However, the use of coating anti-corrosion still faces the problem that the coating itself...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/62C09D7/63C08G59/42
CPCC09D163/00C09D5/08C09D7/62C09D7/63C08G59/423C08K2201/011C08K9/06C08K3/22C08K3/042C08K5/5419
Inventor 欧宝立汪雨微邢赟鲁忆郭艳
Owner HUNAN UNIV OF SCI & TECH