Preparation method of polydopamine doped graphene corrosion-resistant coating
A corrosion-resistant coating, polydopamine technology, applied in coatings, anti-corrosion coatings, devices for coating liquids on surfaces, etc., can solve the problems of graphene corrosion protection failure and other problems, achieve inhibition of galvanic corrosion reaction, and environmental friendliness , the effect of simple preparation process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0023] The TEM test results of the polydopamine-wrapped graphene composite coating are as follows: figure 1 As shown, the results show that graphene is distributed in polydopamine, and the polydopamine-wrapped graphene composite coating is successfully prepared; the coating spectrum test results are as follows: figure 2 As shown, the results show that polydopamine repairs the structural defects of graphene through π-π conjugation; the coating corrosion resistance test results are as follows image 3 As shown, the results show that the galvanic corrosion reaction is suppressed, and the polydopamine-wrapped graphene composite coating has excellent corrosion resistance. The specific implementation steps are as follows:
[0024] Firstly, graphene was dispersed in deionized water with a graphene concentration of 1 g / L, ultrasonically oscillated for 30 minutes, and then magnetically stirred for 30 minutes to achieve preliminary dispersion of graphene. Add Tris (trishydroxymethyla...
Embodiment 2
[0026] First disperse graphene into deionized water, control the graphene concentration to 1 g / L, ultrasonically vibrate for 30 minutes, and then magnetically stir for 30 minutes. Add Tris (trishydroxymethylaminomethane) to graphene aqueous solution subsequently, keep its concentration as 10mmol / L. Sodium hydroxide solution was used to adjust the pH value of the solution to stabilize the pH at about 8.5. Dopamine was added to the solution to maintain its concentration at 0.5 g / L. The copper foil (1cm×1cm×0.2cm) was immersed in the solution, and the solution was placed in an environment of 20°C for 6 hours, and at the same time, the magnetic stirring was continuously and slowly stirred to prepare a polydopamine-wrapped graphene composite coating with a thickness of about 2nm. .
Embodiment 3
[0028] Disperse graphene in deionized water with a graphene concentration of 1 g / L, ultrasonically vibrate for 60 minutes, and then magnetically stir for 60 minutes to achieve preliminary dispersion of graphene. Add Tris (trishydroxymethylaminomethane) to graphene aqueous solution subsequently, keep its concentration as 10mmol / L. Use sodium hydroxide solution to adjust the pH value of the solution to stabilize the pH at about 8. Add dopamine to the solution to keep the concentration of dopamine at 2 g / L. Submerge the copper foil (1cm×1cm×0.2cm) into the solution, place the solution in an environment of 30°C for 18 hours, and use magnetic stirring to continuously and slowly stir the solution to form a polydopamine-wrapped graphene composite coating on the surface of the copper foil , the thickness of the coating is about 10 nm.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Thickness | aaaaa | aaaaa |
| Thickness | aaaaa | aaaaa |
| Thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More