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A self-healing coating based on quinoline nano-metal-organic framework materials and its preparation method

A nano-metal and organic framework technology, applied in coatings, anti-corrosion coatings, etc., can solve problems such as insufficient release of zinc ions and phosphate ions, unable to protect damaged parts of the coating, poor water solubility, etc.

Active Publication Date: 2022-03-22
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: Zinc phosphate is a common anti-corrosion pigment / filler currently used to improve the protective performance of organic coatings, but due to its poor water solubility, the release of zinc ions and phosphate ions in aqueous solution is insufficient to protect the damaged part of the coating

Method used

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  • A self-healing coating based on quinoline nano-metal-organic framework materials and its preparation method
  • A self-healing coating based on quinoline nano-metal-organic framework materials and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The manganese complex based on 2,3-quinoline dicarboxylate [Mn 2 (2,3-qdc) 2 (H 2 O) 6 ·H 2 O] n The self-healing coating, characterized in that, 2,3-quinoline dicarboxylic acid manganese complex [Mn 2 (2,3-qdc) 2 (H 2 O)6·H 2 O] n Prepared by the following method: 6mmol (1.4773g) Mn(CH 3 COO) 2 4H 2 O, 3mmol (0.8136g) 2,3-qdc was added to a 50mL beaker, followed by adding 20mL distilled water and 10mL anhydrous methanol, stirring magnetically at room temperature for 10min until all the reagents were dissolved, then adjusting the pH to 6 with triethylamine, and stirring again 30min; transfer the mixed solution into a 50mL reaction kettle with a polytetrafluoroethylene bottle, put it into an oven and heat to 120°C for 6h. After 6 hours, turn off the oven and cool slowly to room temperature. A large amount of light yellow powder is formed. Centrifuge, wash with absolute ethanol and acetone alternately, and dry in a vacuum oven at 50°C for 6 hours to obtain 2.2...

Embodiment 2

[0022] The manganese complex [Mn(2,2'-bca)(1,10-phen)(H 2 O) 2 ] n The self-healing coating is characterized in that its 2,2'-diquinoline-4,4'-dicarboxylate manganese complex [Mn(2,2'-bca)(1,10-phen)(H 2 O) 2 ] n Prepared by the following method: 3mmol (1.0378g) 2,2'-bca was dissolved in 8mL DMF solution, placed in a 50mL beaker, and 20mL containing 6mmol (1.4820g) Mn(CH 3 OOH) 2 4H 2O distilled aqueous solution and 15 mL methanol solution containing 3 mmol (0.5491 g) 1,10-phen were magnetically stirred at room temperature for 10 min, adjusted to pH ≈ 6 with triethylamine, and then stirred for 30 min; Put it in the reaction kettle of vinyl fluoride bottle, put it into an oven and heat it to 120°C for 6h. After 6 hours, turn off the oven and cool slowly to room temperature. A large amount of yellow-brown powder is formed. Centrifuge, wash with absolute ethanol and acetone alternately, and dry in a vacuum oven at 50°C for 6 hours to obtain 1.2451 g of powder (referred to ...

Embodiment 3

[0026] The manganese complex based on 2,2'-diquinoline-4,4'-dicarboxylate [Mn 2 (2,2'-bca) 2 (H 2 O) 2 ] n The self-healing coating is characterized in that its 2,2'-diquinoline-4,4'-dicarboxylate manganese complex [Mn2(2,2'-bca) 2 (H 2 O) 2 ] n Prepared by the following method: 3mmol (1.0350g) 2,2'-bca was dissolved in 10mL DMF solution, placed in a 50mL beaker, and 20mL containing 6mmol (1.4761g) Mn(CH 3 OOH) 2 4H 2 Distilled aqueous solution of O, magnetically stirred at room temperature for 10 minutes, adjusted to pH ≈ 6 with triethylamine, and then stirred for 30 minutes; transferred the mixed solution into a 50 mL reaction kettle with a polytetrafluoroethylene bottle, and heated it in an oven to 120°C for reaction 6h. After 6 hours, turn off the oven and cool slowly to room temperature. A large amount of yellow-brown powder is formed. Centrifuge, wash alternately with absolute ethanol and acetone, and dry in a vacuum oven at 50°C for 6 hours to obtain 2.3761 g ...

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Abstract

The invention provides a self-healing coating based on quinoline nanometer metal-organic framework materials. The coating consists of quinoline-based nano-metal-organic frameworks (referred to as NMOFs) and a water-based acrylic resin matrix. Zinc phosphate is currently a common anti-corrosion pigment / filler used to improve the protective performance of organic coatings. However, due to its poor water solubility, the release of zinc ions and phosphate ions in aqueous solution is insufficient to repair the damaged part of the coating. This patent proposes to load zinc phosphate into NMOFs materials and prepare a self-healing coating, which can gradually release zinc phosphate molecules and realize the self-healing performance of the coating. The self-healing coating has a fast pH-response characteristic, can release zinc phosphate quickly, and can repair the damaged part of the coating in time to extend the corrosion resistance of the carbon steel substrate.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanometer metal-organic framework materials and anti-corrosion coatings, and in particular relates to a self-repairing coating based on quinoline nanometer metal-organic framework materials and a preparation method thereof. Background technique [0002] Due to the barrier effect of organic coatings, organic coatings have been widely used for corrosion protection of metal substrates. However, the deterioration of the coating during its use leads to a decrease in its barrier properties, so various types of fillers and pigments are often added to the coating to prolong its service life. Zinc phosphate is currently a commonly used anti-corrosion pigment / filler to improve the protective performance of organic coatings. However, due to its poor water solubility, the release of zinc ions and phosphate ions in the aqueous solution is insufficient, and the damaged part of the coating cannot be effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D133/00C08G83/00
CPCC09D5/084C09D133/00C08G83/008C08G2150/90C08K2003/328C08K9/12C08K3/32
Inventor 刘峥陈则胜孙丹劳洁梁楚欣
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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