Metal organic framework/epoxy coating, and preparation method and application thereof

A metal-organic framework and epoxy coating technology, applied in the field of coatings, can solve the problems of high doping coating preparation cost, increasing doping content, etc., and achieve strong corrosion protection performance and integrity, and low doping content , The effect of saving production costs

Inactive Publication Date: 2021-12-17
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, metal-organic frameworks have been used to modify epoxy resins. However, traditional metal-organic frameworks are in the form of particles. To achieve a shielding effect equivalent to that of graphene, it can only be achieved by increasing the doping amount.
However, excessive doping will not only increase the cost of coating preparation, but also promote the occurrence of coating defects

Method used

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  • Metal organic framework/epoxy coating, and preparation method and application thereof
  • Metal organic framework/epoxy coating, and preparation method and application thereof
  • Metal organic framework/epoxy coating, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, the preparation method of zeolite methyl imidazolium ester framework nanosheet

[0042] A preparation method of zeolite methylimidazolate framework nanosheets, comprising the following steps:

[0043] 0.33g Zn(NO 3 ) 2 ·6H 2 O was added to 90 mL of deionized water, and stirred until it was completely dissolved; similarly, 0.985 g of 2-methylimidazole was added to 90 mL of deionized water, and stirred until it was completely dissolved. Then, the above two solutions were mixed together and stirred at room temperature for 24 h to obtain a white cloudy solution. Then the above white turbid solution was centrifuged at 8000rpm for 5min, and washed 3 times with deionized water. Finally, the collected white solid was vacuum-dried at 110°C for 4 hours to obtain a white powder that is zeolite methylimidazolate framework nanosheets (average size 2-5 μm, refer to the crystal structure diagram figure 1 ).

[0044] The reaction formula for preparing zeolite methyl...

Embodiment 2

[0046] Embodiment 2, the preparation method of zeolite methylimidazolate skeleton nanoparticle

[0047] A preparation method of zeolite methylimidazolate framework nanoparticles, comprising the following steps:

[0048] Add 1.6 g of 2-methylimidazole into 20 mL of deionized water and stir until completely dissolved; similarly, dissolve 1.225 g of zinc nitrate hexahydrate in 30 mL of deionized water. After the two substances are completely dissolved, use a dropper to slowly add the solution containing zinc nitrate hexahydrate into the 2-methylimidazole solution. The dropwise addition process is about 10 minutes. After completion, cover with plastic wrap and continue to react at room temperature under stirring conditions. 2 hours. Then the product was centrifuged at 8000r / min for 5 minutes, and washed 3 times with deionized water. Finally, dry in an oven at 110° C. for 8 hours (or in a vacuum oven at 110° C. for 4 hours) to obtain a white powder that is zeolite methylimidazola...

Embodiment 3

[0049] Embodiment 3, a kind of zeolite methylimidazolium ester framework nanosheet / epoxy composite coating and preparation method thereof

[0050] A preparation method of zeolite methyl imidazolate skeleton nanosheet / epoxy composite coating, comprising the following steps:

[0051] S1. Take 0.01 g of the zeolite methylimidazolate skeleton nanosheets prepared in Example 1 and add them to 5 mL of methanol, and after ultrasonic treatment for 30 min, stir until completely dissolved to obtain a mixed solution;

[0052] S2. Add 10g of E-44 epoxy resin to the mixed solution, stir evenly, and ultrasonically again for 2 hours to obtain a white turbid solution;

[0053] S3, add 2.5g aliphatic amine to the white turbid liquid and stir evenly, vacuum degassing for 5min, obtain zeolite methylimidazolate skeleton nanosheet / epoxy coating;

[0054] S4. Scrape-coat the above-mentioned zeolite methylimidazolium ester skeleton nanosheets / epoxy coating on the surface of the aluminum plate with a...

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Abstract

The invention relates to the technical field of coatings, and particularly discloses a metal organic framework / epoxy coating, and a preparation method and application thereof. The metal organic framework / epoxy coating comprises a metal organic framework and epoxy resin, and the mass ratio of the metal organic framework to the epoxy resin is (0.01-0.05): 10. The metal organic framework comprises zeolite methylimidazolate framework nanosheets or zeolite methylimidazolate framework nanoparticles. The coating is obtained by compounding the metal organic framework and the epoxy resin according to a specific mass ratio, the compatibility of the metal organic framework and the epoxy resin is facilitated by reducing the doping amount of the metal organic framework, and meanwhile, the corrosion resistance of the coating can be enhanced, so that the corrosion resistance of a composite coating containing the coating on the surface is improved, and on the basis of improving the anti-corrosion protection performance of the composite coating, the production cost is also saved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a metal organic framework / epoxy coating and its preparation method and application. Background technique [0002] Among the four major corrosion protection technologies, surface coating technology is widely favored due to its advantages of convenience, variety, mature technology, and controllable cost. Among them, epoxy resin, as the most common synthetic resin, has certain hardness, wear resistance and corrosion resistance, but it still cannot adapt to the corrosive environment of "high salt, high humidity and high heat" in the South my country Sea. Severe corrosion problems lead to The service life of metal products is greatly shortened. [0003] When serving in the marine environment, the key scientific problem of epoxy coating failure is: the integrity of the coating is destroyed, and the shielding performance against corrosive media is weakened accordingly. During the curi...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D163/00C09D5/08C09D187/00
CPCC09D163/00C09D5/08C08L87/00
Inventor 李伟华陈俊男薛铭冯锦华
Owner SUN YAT SEN UNIV
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