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Preparation method and application of GO-TA/waterborne epoxy composite coating

A GO-TA and composite coating technology, which is applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve the problems of poor corrosion resistance and limited application in anti-corrosion fields, and achieve good stability, simple and feasible preparation process, and low cost low effect

Inactive Publication Date: 2018-09-28
SOUTHWEST PETROLEUM UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, due to the requirements of environmental protection, water-based polymer coatings have received more and more attention and been widely used in the field of corrosion science; however, compared with organic coatings, water-based coatings have poor corrosion resistance, which limits their application in corrosion protection. field application

Method used

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  • Preparation method and application of GO-TA/waterborne epoxy composite coating
  • Preparation method and application of GO-TA/waterborne epoxy composite coating
  • Preparation method and application of GO-TA/waterborne epoxy composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of GO-TA / waterborne epoxy composite coating comprises the following steps.

[0029] (1) Preparation of base material.

[0030] Weigh the water-based epoxy resin and curing agent to mix, stir until the solution is uniform, and obtain a uniformly mixed base material.

[0031] (2) Preparation of GO-TA dispersion.

[0032] Add 100mL deionized water and 0.05g tannic acid (TA) into a 250mL beaker, and oscillate ultrasonically for 20min. Then, add 0.1g graphene under ultrasonic vibration (600W) and disperse in the above tannic acid solution for 1 hour to obtain Ta intercalated graphene dispersion, and finally remove it by high-speed centrifuge (1000r / min-1500r / min) The unreacted graphene and tannic acid in the solution were mixed, and then the GO-TA dispersion was obtained.

[0033] (3) Preparation of graphene waterborne epoxy composite coating

[0034] Weigh the base material and GO-TA dispersion solution and mix, stir to form a uniform dispersion sys...

experiment example 2

[0039] Mix 0.5%, 0.7%, and 1.0% GO-TA dispersions with waterborne epoxy resin, and disperse them ultrasonically for 1 hour to prepare 0.5% GO-TA / waterborne epoxy coatings and 0.7% GO-TA / waterborne epoxy coatings, respectively. and 1% GO-TA / water-based epoxy paint, and then move them into the spray gun and spray evenly on the sandblasted and welded substrate steel sheet (P110). It is carried out within 1 hour. After the spraying is completed, the coated steel sheet is cured at room temperature for 2 days to obtain a sample coating. Pure water-based epoxy resin is used as a control.

[0040] (1) The stability of GO-TA dispersion solution was observed by static method. see attached results figure 2 , it can be observed from the figure that the unmodified GO material completely settled in the aqueous solution for 2-3 hours, while the GO-TA dispersion solution did not settle after standing for 30 days, and the dispersion was relatively uniform, indicating that the GO-TA dispersio...

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Abstract

The invention discloses a preparation method and the application of GO-TA / waterborne epoxy composite coating. The preparation method comprises the following steps: (1), preparing a base material; (2),preparing a GO-TA dispersion; (3), preparing the GO-TA / waterborne epoxy composite coating. Test and analysis show that tannic acid and graphene are combined through a pi-pi conjugate interaction force of a benzene ring, and the graphene can be uniformly and stably dispersed in an aqueous solution while the complete structure of the grapheme is not destroyed. Through mixing of the modified graphene and waterborne epoxy resin, the corrosion resistance of waterborne epoxy coating can be greatly improved, and the application field of the graphene is widened.

Description

technical field [0001] The invention belongs to the field of preparation methods of graphene composite water-based coatings, and in particular relates to a preparation method and application of GO-TA / water-based epoxy composite coatings. Background technique [0002] In recent years, due to the requirements of environmental protection, water-based polymer coatings have received more and more attention and been widely used in the field of corrosion science; however, compared with organic coatings, water-based coatings have poor corrosion resistance, which limits their application in corrosion protection. field applications. Graphene, a promising two-dimensional (2D) nanocarbon material, has attracted widespread interest due to its unique structure and excellent electronic, mechanical and barrier properties, but graphene (GO) is highly hydrophobic , it is difficult to disperse in water-based epoxy resin; and tannic acid (TA) is a food-grade natural crosslinking agent that exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/62
CPCC09D5/08C09D7/62C09D163/00C08K9/04C08K3/042
Inventor 何毅陈春林伍友清钟菲卿大咏李虹杰夏云卿李静
Owner SOUTHWEST PETROLEUM UNIV
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