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Composite shell material microcapsule with double anti-corrosion function and preparation method thereof

A microcapsule and anti-corrosion technology, which is applied in the direction of anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of no corrosion inhibition, poor compatibility between microcapsules and the matrix, and achieve uniform particle size distribution of the emulsion. Effect of improving toughness and mechanical strength and improving compatibility

Active Publication Date: 2019-04-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It has been reported that a variety of polymers (such as polystyrene, polyurethane, polyurea, etc.) are used as shell materials to prepare anti-corrosion microcapsules, but most of the shell materials mainly play a role of coating and provide mechanical support, but have no effect on corrosion itself. There is an inhibitory effect, and poor compatibility between microcapsules and the matrix is ​​also a major problem at present

Method used

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  • Composite shell material microcapsule with double anti-corrosion function and preparation method thereof
  • Composite shell material microcapsule with double anti-corrosion function and preparation method thereof
  • Composite shell material microcapsule with double anti-corrosion function and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] A method for preparing composite shell material microcapsules with dual anti-corrosion effects, comprising the steps of:

[0033] (1) First weigh 6g of nano-SiO 2 (50nm) dispersed in 50mL solvent ethanol, then add 120mg of diphenyldimethoxysilane, add ammonia water to adjust the pH to 10, react at 50°C for 8h, wash with ethanol and water alternately after the reaction to obtain modified nano-SiO 2 ;

[0034] (2) 180 mg of modified SiO obtained in step (1) was ultrasonically 2 Disperse evenly in 6mL ultrapure water as the water phase, and dissolve 0.3mL aniline, 0.9mL glycidyl methacrylate (GMA), 0.9mL 1,6-hexanediol acrylate (HDDA) in 3.9mL oil phase toluene In, add 36mg photoinitiator 369 simultaneously as oil phase; Mix oil-water two-phase, emulsify 2min by the emulsifying machine of 8000rmp to form stable oil-in-water (O / W) type emulsion;

[0035](3) Place the emulsion prepared in step (2) in a UV curing machine for 3 minutes of light to polymerize the vinyl monom...

Embodiment 2

[0041] A method for preparing composite shell material microcapsules with dual anti-corrosion effects, comprising the steps of:

[0042] (1) First weigh 6g of nano-SiO 2 (100nm) dispersed in 50mL solvent ethanol, then add 300mg of 3-methoxyacryloxypropyltrimethoxysilane, add ammonia water to adjust the pH to 8, react at 60°C for 12h, wash with ethanol and water alternately after reaction get the product.

[0043] (2) The modified nano-SiO obtained in the step (1) of 240 mg is ultrasonically 2 Disperse evenly in 6mL ultrapure water, and dissolve 0.3mL aniline, 0.75mL dimethylaminoethyl methacrylate (DMAEMA), and 0.75mL divinylbenzene (DVB) in 1.2mL oil phase ethyl acetate at the same time 54mg of photoinitiator 1173 was added. Mix the two phases of oil and water, and emulsify for 5 minutes through an emulsifier at 10000rmp to form a stable oil-in-water (O / W) emulsion.

[0044] (3) Put the emulsion prepared in step (2) in a UV curing machine for 4 minutes to irradiate to pol...

Embodiment 3

[0047] A method for preparing composite shell material microcapsules with dual anti-corrosion effects, comprising the steps of:

[0048] (1) 300 mg of commercially available gas-phase SiO was ultrasonically 2 (15nm) was uniformly dispersed in 6mL ultrapure water, and at the same time, 0.3mL aniline, 0.72mL styrene (St), 0.18mL dipropylene glycol diacrylate (DPGDA) were dissolved in 0.3mL oil phase dichloroethane, and simultaneously added 41 mg Photoinitiator 907. Mix the two phases of oil and water, and emulsify them with an emulsifier at 12500rmp for 10min to form a stable oil-in-water (O / W) emulsion.

[0049] (2) Pour the emulsion prepared in step (1) into a UV curing machine for 5 minutes of light to polymerize vinyl monomers. After light, add 2 mL of aqueous solution containing 250 mg of ammonium persulfate and 50 μL of HCl (1M) drop by drop. , to polymerize aniline, react without any stirring at 20°C for 24h, alternately wash with water and ethanol and dry to obtain com...

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Abstract

The invention discloses a composite shell material microcapsule with a double anti-corrosion function. A shell material of the microcapsule consists of polyaniline, vinyl polymer and nano SiO2; a corematerial of the microcapsule is a metal corrosion inhibitor; the size of the microcapsule is 5-100 microns, and the shell thickness of the microcapsule is 100 nanometers-2 microns; a monomer of the vinyl polymer is a mixture of a monofunctional vinyl monomer and a bifunctional vinyl monomer. The metal corrosion inhibitor is one or more of benzotriazole, methylbenzotriazole, nitrobenzotriazole, hydroxybenzotriazole, 2-mercaptobenzothiazole and 8-hydroxyquinoline. According to the microcapsule, polyaniline with an anti-corrosion function and an olefin polymer with good compatibility with matrixresin are used as load anti-corrosion functional substances of the shell material of the microcapsule, so that the composite shell material microcapsule with the double anti-corrosion function is prepared.

Description

technical field [0001] The invention relates to the technical field of polymer materials and anti-corrosion microcapsules, in particular to a composite shell material microcapsule with double anti-corrosion functions and a preparation method thereof. Background technique [0002] Microcapsule technology is currently the most commonly used functional material loading method. Its advantage is that it is an effective material immobilization technology, which can encapsulate molecules through the capsule wall and isolate them from the external environment, protecting the properties of the capsule core from being affected. Controlled release can be achieved by destroying the capsule wall under conditions such as pressurization, temperature rise or radiation, or by causing the capsule core material to diffuse outward through the capsule wall. At present, there are many methods for preparing microcapsules, such as template method, interfacial polycondensation method, in-situ polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D163/00C08G73/02C08F220/32C08F222/20C08F220/34C08F212/36C08F212/08
CPCC08F212/08C08F212/36C08F220/32C08F220/325C08F220/34C08F222/1006C08F222/102C08G73/0266C09D5/08C09D163/00
Inventor 罗静董佳豪刘仁陶俊杰胡炳全
Owner JIANGNAN UNIV
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