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Methods for preparing graphene dispersant and graphene/raw paint composite anti-corrosive coating

A technology of graphene dispersant and graphene dispersion liquid, which is applied in the direction of anti-corrosion coatings, lignin coatings, natural resin coatings, etc., and can solve the problems of affecting the application effect of graphene, short anti-sedimentation time, poor graphene dispersion effect, etc. , to achieve the effect of improving anti-settling time, excellent anti-corrosion performance, and easy operation

Inactive Publication Date: 2018-04-27
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of modifying graphene aqueous solution by redox method, the application effect of graphene is often affected due to poor dispersion effect of graphene or too short anti-sedimentation time.

Method used

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  • Methods for preparing graphene dispersant and graphene/raw paint composite anti-corrosive coating
  • Methods for preparing graphene dispersant and graphene/raw paint composite anti-corrosive coating
  • Methods for preparing graphene dispersant and graphene/raw paint composite anti-corrosive coating

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preparation example Construction

[0019] A preparation method of graphene dispersant, comprising the following steps:

[0020] S10. Take sodium lignosulfonate, ammonium persulfate and deionized water, add them into the reaction vessel and stir to fully dissolve the sodium lignosulfonate;

[0021] S20, add trans-1,2,3-propenetricarboxylic acid and acrylamide to react, after the reaction is complete, cool the reaction solution to room temperature;

[0022] S30. Add an organic solvent dropwise to the reaction solution to precipitate a solid, filter to obtain a crude product, purify and dry the obtained crude product to obtain a graphene dispersant.

[0023] It can be seen from the above description that the beneficial effects of the present invention are: 1) The manufacturing cost is low. A large amount of by-product sodium lignosulfonate produced in the paper industry is used as a raw material to chemically modify modified lignin as a dispersion stabilizer for graphene, and the manufacturing cost is low; 2) the...

Embodiment 1

[0064] Weigh 1.00g of sodium lignosulfonic acid sodium salt (LS for short), 0.05g of ammonium persulfate and 20.00g of deionized water, add them into a 250ml three-necked flask, and stir at room temperature for 20min to fully dissolve LS; Then add 5.00g trans-1,2,3-propenetricarboxylic acid and 5.00g acrylamide, in N 2 Under atmosphere, react at 75°C for 5h. The reaction was cooled to room temperature, and the reaction liquid was added dropwise into 250ml of isopropanol to precipitate a solid precipitate, and the crude product was obtained by filtration, which was subjected to Soxhlet extraction with acetone for 10 hours, and the obtained product was placed in a vacuum oven at 30°C to dry Dry 18h in the oven to obtain the graphene dispersant.

[0065] Weigh 0.60g of the above-mentioned graphene dispersant, add 100ml of deionized water, and after ultrasonication at room temperature for 10min, adjust the pH value of the solution to 9, then add 0.60g of graphene, continue ultras...

Embodiment 2

[0068] Weigh 1.00g of sodium lignosulfonate LS, 0.03g of ammonium persulfate and 20.00g of deionized water, add them into a 250ml three-neck flask, stir at room temperature for 20min to fully dissolve LS; then add 4.00g of trans-1 , 2,3-propenetricarboxylic acid and 4.00g acryloyl ammonium, in N 2 Under atmosphere, react at 80°C for 4h. The reaction was cooled to room temperature, and the reaction liquid was added dropwise into 250ml of isopropanol to precipitate a solid precipitate, and the crude product was obtained by filtration, and the obtained crude product was subjected to Soxhlet extraction with acetone solution for 10 h, and the obtained product was placed in a vacuum at 35°C Dry 15h in drying oven to obtain graphene dispersant.

[0069] Weigh 0.60g of the above-mentioned graphene dispersant, add 100ml of deionized water, and after ultrasonication at room temperature for 10min, adjust the pH value of the solution to 8, then add 0.80g of graphene, continue ultrasonica...

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Abstract

The invention discloses methods for preparing a graphene dispersant and a graphene / raw paint composite anti-corrosive coating. The method for preparing the graphene dispersant comprises adding sodiumlignosulphonate, ammonium persulfate and deionized water into a reaction container, carrying out stirring so that the sodium lignosulfonate is fully dissolved, adding trans-1, 2, 3-aconitic acid and acrylamide into the solution for a reaction, then cooling the reaction solution to the room temperature, adding an organic solvent into the reaction solution drop by drop to separate solid precipitates, filtering the solid precipitates to obtain a crude product, and purifying and drying the crude product to obtain the graphene dispersant. The method for preparing the graphene / raw paint composite anti-corrosive coating comprises dissolving the graphene dispersant in water, carrying out ultrasonic treatment for full dissolution, adjusting pH to greater than 7, adding graphene into the solution, carrying out uniform ultrasonic mixing to obtain a graphene dispersion liquid, adding the graphene dispersion liquid into raw paint and carrying out uniform stirring to obtain the graphene / raw paint composite anti-corrosive coating.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of a graphene dispersant and a graphene / raw lacquer composite anticorrosion coating. Background technique [0002] Since human society entered the steel age, the hazards of corrosion have been with us—it is like a slow poison, and its development process is extremely slow, so it is easy to be ignored by people. The annual economic loss caused by corrosion in my country accounts for about 3.34% of the annual GDP, exceeding two trillion yuan. Corrosion leads to costly losses, prompting researchers worldwide to continuously search for ways to reduce corrosion. Currently, researchers have explored many effective ways to minimize corrosion. Organic coatings (single / multi-component, composites and blends, etc.) are one of the most widely used corrosion control strategies. Because graphene has excellent thermal stability, excellent impermeability and effective barrier to ...

Claims

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Application Information

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IPC IPC(8): C08H7/00C09D193/00C09D197/00C09D5/08C09D7/45C09D7/61
CPCC08H6/00C09D5/08C09D193/00C08L97/00C08K3/04
Inventor 徐艳莲邓雅君白卫斌林金火
Owner FUJIAN NORMAL UNIV
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