A kind of preparation method of photorepair microcapsule

A technology of microcapsules and capsule cores, applied in the field of metal anti-corrosion, can solve the problems of the release rate of capsule cores, etc., and achieve the effect of easing the adjustment process, appropriate reaction rate, and simple coating process

Active Publication Date: 2019-12-03
IANGSU JINLING SPECIAL PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different capsule wall materials have different effects on the release rate of microcapsules. Generally speaking, capsules with high porosity in the capsule wall have a large release rate in the capsule core. The resistance encountered by the core through the wall membrane is high, so the release rate of the capsule core is reduced

Method used

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  • A kind of preparation method of photorepair microcapsule
  • A kind of preparation method of photorepair microcapsule
  • A kind of preparation method of photorepair microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of photoinduced self-healing microcapsules comprises the following steps:

[0033] (1) In a water bath at 45°C, 9.06g of chromone coumarin and 0.1g of sodium lauryl sulfate were emulsified for 25 minutes under stirring conditions, and 30g of distilled water was added dropwise to it, and 1-2 drops were added during the emulsification process The defoamer n-octanol reduces the surface activation energy of the capsule core material emulsion, making the capsule core material more stable and easy to be coated, thereby obtaining the capsule core material emulsion;

[0034] (2) Mix 5.35 g of urea and 12.57 g of formaldehyde solution with a mass concentration of 37%, adjust the pH of the mixture to 8 with triethanolamine, react for 1 hour at a temperature of 60° C., and then add 30 g of distilled water to form an interface Mixed solution to obtain a capsule wall prepolymer material solution;

[0035] (3) Pour the emulsified capsule core material emulsion into a...

Embodiment 2

[0038] The preparation of photoinduced self-healing microcapsules comprises the following steps:

[0039](1) In a water bath at 50°C, 12.08g of sesquiterpene coumarin and 0.12g of sodium lauryl sulfate were emulsified for 30min under stirring conditions, and 40g of distilled water was added dropwise to it. During the emulsification process, 1-2 Drop the defoamer n-octanol to reduce the surface activation energy of the capsule core material emulsion, making the capsule core material more stable and easy to be coated, thus obtaining the capsule core material emulsion;

[0040] (2) Mix 6.35g of urea with 13.57g of formaldehyde solution with a mass concentration of 37%, adjust the pH of the mixture to 8.5 with triethanolamine, react for 1.5h at a temperature of 70°C, and then add 40g of distilled water to form Interface mixed solution to obtain a solution of the capsule wall prepolymer material;

[0041] (3) Pour the emulsified core material into a 250mL three-neck flask, stir at...

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Abstract

Provided is a method of preparing a photoinitiated selfrepairing microcapsule, comprising: (1) obtaining a capsule core material emulsion by stirring a coumarin compound and sodium lauryl sulfate at 40-55 ℃ (water bath), dropwisely adding water, and emulsifying 20-40min; (2) obtaining a capsule wall prepolymer material solution by mixing urea and aqueous formaldehyde solution, adjusting pH to 8-9 and reacting at 60-70 ℃ for 1-2 hours; (3) obtaining a solution containing microcapsules by slowly dripping the capsule wall prepolymer material solution of step (2) into the capsule core material emulsion of step (1) under stirring, adjusting the pH value to be neutral and curing. The coating process of the method is simple and safe with no need for for a catalyst,and has a low cost. The coumarin-based capsule core material can be cross-linked under photoinitiation to repair micro-cracks, and the capsulate wall material is an environmentally friendly co-condensed resin of urea-formaldehyde.

Description

technical field [0001] The invention relates to the technical field of metal anticorrosion, in particular to a preparation technology method of environmentally friendly coated photorepair microcapsules. Background technique [0002] Metal corrosion is a phenomenon in which metal is destroyed by the chemical or electrochemical action of the environmental medium. Metal corrosion pervades all fields of the national economy and brings huge losses to the national economy. For a long time, people have been using a variety of technologies to protect metals. One of the most effective and economical methods is to coat the metal surface with an anti-corrosion coating to isolate the corrosive medium from the metal substrate. Microcracks will be generated due to changes in the environment or mechanical properties, and due to exposure to the atmosphere, the microcracks will gradually spread and expand, thereby accelerating the peeling and delamination of the coating on the metal-paint in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02B01J13/14C09D7/65C09D7/63C09D5/08C08G12/12
CPCB01J13/14C08G12/12C09D5/08
Inventor 李伟华卞直兵戴海雄宋立英马庆磊蹇锡高陈鼎
Owner IANGSU JINLING SPECIAL PAINT CO LTD
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