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A kind of self-healing superhydrophobic nano anticorrosion coating and preparation method thereof

An anti-corrosion coating and super-hydrophobic technology, applied in anti-corrosion coatings, microsphere preparation, coating, etc., can solve the problems of single composition of microcapsule cores and poor mechanical properties, achieve good anti-corrosion effect, realize self-healing, mechanical properties good performance effect

Active Publication Date: 2022-03-08
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the prior art, and provide a preparation method of microcapsules to solve the problems of single core components and poor mechanical properties of the existing microcapsule capsules, and will use this method to prepare The obtained microcapsules are used to prepare self-healing superhydrophobic nano-anticorrosion coatings with good mechanical properties

Method used

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  • A kind of self-healing superhydrophobic nano anticorrosion coating and preparation method thereof
  • A kind of self-healing superhydrophobic nano anticorrosion coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Preparation of organofluorine silicon modified acrylic resin

[0043] Add 200g of xylene and 8g of emulsifier sodium lauryl sulfate into the reactor, heat to 70°C, and fully stir to dissolve. In another flask, pre-mix 200g methyl methacrylate, 150g butyl acrylate, and 70g α-methacrylic acid, take out 1 / 10 of the acrylate monomer mixture, add it to the reactor for pre-emulsification for 0.5h, and add 3g potassium persulfate , stirred for 5min, after the seed emulsion was formed, began to drop the remaining acrylate monomer mixture, 50g vinyltriethoxysilane and 25g trifluoropropylmethylcyclotrisiloxane, and then added 1g hydrogen peroxide tert-butanol and 1g of Diabalin, heat preservation and continue to react for 1h, after cooling, organofluorosilicon-modified acrylic resin is obtained.

[0044] (2) Preparation of microcapsules

[0045] At room temperature, add 50g of urea and 100g of formaldehyde solution into a four-necked flask, stir to dissolve, adjust the pH o...

Embodiment 2

[0049] (1) Preparation of organofluorine silicon modified acrylic resin

[0050] Add 250g of xylene and 10g of emulsifier sodium lauryl sulfate into the reactor, heat to 70°C, stir and dissolve fully; in another flask, put 200g of methyl methacrylate, 150g of butyl acrylate, 70g of α-methyl Pre-mix acrylic acid, take out 1 / 10 of the acrylate monomer mixture, put it into the reactor for pre-emulsification for 1 hour, add 5g of potassium persulfate, stir for 10 minutes, after the seed emulsion is formed, start to drop the remaining acrylate monomer mixture, 50g Vinyltriethoxysilane and 50g of trifluoropropylmethylcyclotrisiloxane were added, 2g of tert-butanol hydroperoxide and 2g of diabolite were added, and the reaction was continued for 1 hour at heat preservation. After cooling, an organofluorosilicon-modified acrylic resin was obtained.

[0051] (2) Preparation of microcapsules

[0052] At room temperature, add 70g of urea and 140g of formaldehyde solution into a four-neck...

Embodiment 3

[0056] (1) Preparation of organofluorine silicon modified acrylic resin

[0057] Add 200g of xylene and 6g of emulsifier sodium lauryl sulfate into the reactor, heat to 70°C, and fully stir to dissolve; in another flask, put 200g of methyl methacrylate, 100g of butyl acrylate, and 80g of α-methacrylic acid Pre-mixing, take out 1 / 10 of the acrylate monomer mixture, put it into the reactor for pre-emulsification for 2 hours, add 4g of potassium persulfate, stir for 10min, after the seed emulsion is formed, start to drop the remaining acrylate monomer mixture, 30g of ethylene triethoxysilane and 30g of trifluoropropylmethylcyclotrisiloxane, then 1g of tert-butanol hydroperoxide and 2g of diabolite were added, and the reaction was continued for 1h at heat preservation. After cooling, an organofluorosilicon-modified acrylic resin was obtained.

[0058] (2) Preparation of microcapsules

[0059] At room temperature, add 50g of urea and 100g of formaldehyde solution into a four-necke...

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Abstract

The invention discloses a self-repairing super-hydrophobic nano-anticorrosion coating and a preparation method thereof. First, a microcapsule is prepared, and then the microcapsule is mixed with organic fluorine-silicon modified acrylic resin and hydrophobic nano-SiO 2 , xylene and platinum-based catalyst were mixed to prepare a self-healing superhydrophobic nano-anticorrosion coating. The invention uses the mixture of methyl silicone oil and corrosion inhibitor as the capsule core, which not only realizes the uniform dispersion of the corrosion inhibitor in the matrix resin, but also realizes the self-repair of the coating surface, which can effectively avoid losses during service and transportation; The process of the present invention is simple, energy-saving and environmentally friendly, and is suitable for large-scale production. After the self-repairing super-hydrophobic nano-anti-corrosion coating of the present invention is made into a coating, the coating has good mechanical properties, good anti-corrosion effect, and the impedance repairing efficiency of the coating can reach 98%, and the fracture toughness repair efficiency can reach 99%.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coating. Specifically, it relates to a self-healing superhydrophobic nano-anticorrosion coating and a preparation method thereof. Background technique [0002] Metal corrosion has always been one of the biggest challenges faced by industries such as steel, metallurgy, construction, and transportation. According to statistics, the direct economic losses caused by corrosion in countries around the world account for about 2% to 4% of their gross national product every year. There are also data showing that every time the second hand on a watch makes one and a half revolutions, one ton of steel in the world is corroded into slag. Traditionally, chromate is commonly used as a passivation layer for metal surface protection. However, due to the highly toxic and carcinogenic characteristics of chromate, chromate is banned. Therefore, it is imminent to develop an environmentally friendly chromate-f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D7/65C09D133/04C09D7/61B01J13/02
CPCC09D5/08C09D7/65C09D143/04C09D7/61B01J13/02C08L2205/03C08L83/04C08K3/36C08K9/10C08K5/3475C08K13/06
Inventor 李伟华刘睿曹文凯刘法谦
Owner SUN YAT SEN UNIV