Preparation method of photo-induced repair microcapsules

A microcapsule and light-induced technology, applied in the field of metal anti-corrosion, can solve the problem of the release rate of the capsule core, etc., and achieve the effect of easing the adjustment process, appropriate reaction rate, and precise pH adjustment

Active Publication Date: 2017-02-01
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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  • Preparation method of photo-induced repair microcapsules
  • Preparation method of photo-induced repair microcapsules
  • Preparation method of photo-induced repair microcapsules

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 The interfacial mixture is obtained as a solution of the capsule wall prepolymer material;

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

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Abstract

The invention provides a preparation method of photo-induced repair microcapsules. The preparation method includes the steps that 1, a coumarin compound and sodium dodecyl sulfate are stirred at the temperature of 40-55 DEG C (water bath), water is dropwise added, and capsule core material emulsion is obtained after emulsion is carried out for 20-40 minutes; 2, urea and formalin are mixed, the PH value is adjusted to range from 8 to 9, the mixture reacts for 1-2 h at the temperature of 60-70 DEG C, and then a capsule wall prepolymer material solution is obtained; 3, under stirring, the capsule wall prepolymer material solution in the step2 is dropwise added into the capsule core material emulsion in the step1, the PH value is adjusted to be neutral, and a solution containing the microcapsules is obtained after curing. The wrapping process is simple and safe without a catalyst, the cost is low, and a capsule core material of the coumarin compound can generate a cross-linking reaction under light triggering inducing to repair microfractures; a capsule wall material is urea-formaldehyde copolycondensation resin and is environmentally friendly.

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 Applications(China)
IPC IPC(8): C09D7/12C09D5/08B01J13/14C08G12/12
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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