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Preparation method of self-repairing and anti-corrosion coating

An anti-corrosion coating and self-repairing technology, which is applied in anti-corrosion coatings, microsphere preparation, epoxy resin coatings, etc., can solve the problems of inability to combine functions, corrosion does not exist, etc., to improve compatibility and anti-corrosion function, improve the effect of greater rigidity

Active Publication Date: 2019-11-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] It has been reported that a variety of polymers (such as polystyrene, polyurethane, etc.) can be used as shell materials to prepare self-healing or anti-corrosion microcapsules, but the shell materials mainly play a role in coating and provide mechanical support, but have no effect on corrosion itself. Inhibition, and most microcapsules can only provide one of the functions of self-healing and anti-corrosion, and cannot organically combine the two functions. Therefore, it is urgent to develop coatings with dual functions of anti-corrosion and self-healing. Anti-corrosion and self-healing double protection to meet a wider range of application requirements

Method used

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  • Preparation method of self-repairing and anti-corrosion coating

Examples

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Embodiment 1

[0027] A preparation method of self-repairing and anti-corrosion coating based on polyaniline microcapsules, comprising the steps of:

[0028] (1) Dissolve 180 mg of calcium lignosulfonate in 6 mL of water as the aqueous phase by ultrasonication, and simultaneously add 0.96 mL of glycidyl methacrylate (GMA) (0.998 g, density: 1.040 g / mL), 0.24 mL of 1,6- Hexylene glycol acrylate (HDDA) (0.242g, density: 1.010g / mL), 24mg photoinitiator 369 (2% of the monomer mass), 4.2mL tung oil dissolved in 0.6mL toluene as the oil phase, according to the oil-water ratio Mix the two phases at 1:1, and emulsify for 2 minutes at 8000rpm with a high-speed disperser to form a stable oil-in-water (O / W) emulsion;

[0029] (2) Place the emulsion prepared in step (1) under ultraviolet light for 3 minutes to polymerize vinyl monomers, add 0.3 mL of aniline dropwise to the microcapsule dispersion after light, and then add 184 mg of ammonium persulfate ( The molar ratio of aniline is 1:4), 25 μL of hyd...

Embodiment 2

[0034] A preparation method of self-repairing and anti-corrosion coating based on polyaniline microcapsules, comprising the steps of:

[0035](1) Dissolve 480 mg of sodium dodecyl sulfonate in 12 mL of water as the aqueous phase by sonication, and simultaneously add 1.2 mL of dimethylaminoethyl methacrylate (DMAEMA) (1.119 g, density: 0.933 g / mL), 1.2 mL divinylbenzene (DVB) (1.102g, density: 0.919g / mL), 66.6mg photoinitiator 1173 (3% of monomer mass), 3mL hexamethylene diisocyanate (HDI) were dissolved in 0.6mL acetic acid in ethyl ester. Mix the two phases at an oil-to-water ratio of 1:2, and emulsify for 3 minutes at 9000 rpm through a high-speed disperser to form a stable oil-in-water (O / W) emulsion;

[0036] (2) Place the emulsion prepared in step (1) under ultraviolet light for 4 minutes to polymerize vinyl monomers, add 0.6 mL of aniline dropwise to the microcapsule dispersion after light, and then add 735 mg of ammonium persulfate ( The molar ratio of aniline is 1:2)...

Embodiment 3

[0039] A preparation method of self-repairing and anti-corrosion coating based on polyaniline microcapsules, comprising the steps of:

[0040] (1) Dissolve 1.2g of sodium polystyrene sulfonate in 24mL of water as the aqueous phase by ultrasonication, and simultaneously add 0.9mL of styrene (St) (0.827g, density: 0.909g / mL), 0.45mL of dipropylene glycol diacrylate (DPGDA) (0.472g, density: 1.05g / mL), 64.9mg azobisisobutyronitrile (AIBN) (5% of monomer mass), 3.6mL hexamethylene diisocyanate (HDI) dissolved in 1.05mL Dichloromethane, azobisisobutyronitrile. Mix the two phases at an oil-to-water ratio of 1:4, and emulsify for 5 minutes at 10,000 rpm through a high-speed disperser to form a stable oil-in-water (O / W) emulsion;

[0041] (2) Heat the emulsion prepared in step (1) to 70°C for 6 hours to polymerize the vinyl monomer, add 1.2mL of aniline dropwise to the microcapsule dispersion after light, and then add 2.94g of ammonium persulfate (Molar ratio to aniline is 1:1), 100...

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Abstract

The invention relates to a preparation technology of a self-repairing and anti-corrosion coating, and belongs to the technical field of high polymer materials and anti-corrosion coatings. The preparation method comprises the following steps: step 1, mixing an aqueous phase containing an emulsifier with an oil phase containing an alkene polymer monomer, a repairing agent, an initiator and an organic solvent to form an oil-in-water O / W type emulsion, and carrying out irradiation crosslinking or thermal crosslinking to form a microcapsule shell; step 2, dropwise adding aniline into the dispersionliquid of the microcapsule shell obtained in the step 1, adding an aqueous solution containing an aniline initiator, and performing a reaction to obtain a polyaniline microcapsule; and step 3, mixingthe polyaniline microcapsules with the matrix resin to obtain the self-repairing and anti-corrosion coating.

Description

technical field [0001] The invention relates to a self-repairing and anti-corrosion coating preparation technology, which belongs to the technical field of polymer materials and anti-corrosion coatings. Background technique [0002] Metal corrosion is a worldwide problem. At present, there are mainly coating protection, electrochemical protection, metal modification and other methods for metal corrosion. Among them, coating a layer of barrier coating on the metal surface is the most convenient and economical method at present. However, with the development of society and the increasing requirements for the performance of metal materials, the traditional coating that only functions as a barrier Once damaged, the protection of the metal is lost. In recent years, smart coatings with corrosion inhibition and self-healing functions have gradually become the focus of research. They can sense changes in the external corrosion environment and realize self-healing of damaged coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C08G73/02B01J13/14
CPCB01J13/14C08G73/02C08L2205/18C09D5/08C09D163/00C08L79/02
Inventor 罗静潘威豪刘仁董佳豪
Owner JIANGNAN UNIV
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