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Linseed oil microcapsules capable of rapid film formation and timely repair of scratches and preparation method thereof

A technology of microcapsules and linseed oil, applied in the direction of microcapsule preparation, microsphere preparation, coating, etc., can solve the problem of accelerating paint peeling and delamination on the interface between metal and paint, reducing the service life and anti-corrosion ability of paint, damage damage, etc. problems, achieve the effect of uniform and controllable particle size, weak light scattering, and repair scratches

Inactive Publication Date: 2015-08-12
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES +2
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Problems solved by technology

Due to exposure to the atmosphere, the coating will produce microcracks due to changes in the environment or mechanical properties during use, and the microcracks will gradually spread and expand, thereby accelerating the peeling and delamination of the coating on the interface between the metal and the coating. Man-made damage in the middle reduces the service life and anti-corrosion ability of the coating, and also affects the appearance

Method used

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  • Linseed oil microcapsules capable of rapid film formation and timely repair of scratches and preparation method thereof
  • Linseed oil microcapsules capable of rapid film formation and timely repair of scratches and preparation method thereof
  • Linseed oil microcapsules capable of rapid film formation and timely repair of scratches and preparation method thereof

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Embodiment Construction

[0025] Linseed oil microcapsules, which can quickly form a film and repair scratches in time, use linseed oil as the core and gelatin as the wall material. The capsule shape is spherical, the average capsule diameter is 20 μm, the capsule wall is uniform, and the surface is smooth.

[0026] The preparation method is as follows: preparing gelatin emulsion and linseed oil emulsion respectively, adding the linseed oil emulsion into the gelatin emulsion dropwise under stirring, and emulsifying the two phases together. Add glacial acetic acid to adjust the pH value of the solution to 4.8, add sodium sulfate aqueous solution, and cool to 20°C to make the capsule wall dense. Formaldehyde is added dropwise under stirring to solidify the capsule to obtain a solution, and the solution is freeze-dried to obtain a white linseed oil microcapsule solid powder.

[0027] For linseed oil microcapsules used in self-healing coatings, the following requirements are put forward for the quality par...

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Abstract

The invention relates to linseed oil microcapsules capable of quickly forming films to timely repair scratches and a preparation method thereof. According to the microcapsules, linseed oil is used as capsule cores, gelatin is used as a wall material, the capsules are spherical, the average capsule diameter is 20 microns, the capsule walls are uniform, and the surfaces of the microcapsules are smooth. The preparation method comprises the steps of preparing gelatin emulsion and linseed oil emulsion respectively, dripping the linseed oil emulsion into the gelatin emulsion while stirring, and emulsifying the two phases together; adding glacial acetic acid to adjust the pH value of the solution to 4.8, adding an aqueous solution of anhydrous sodium sulfate, and cooling to 20 DEG C to wrap the capsule walls compactly; dripping formaldehyde while stirring, curing capsule films to obtain a solution, and performing freeze drying on the solution to obtain white linseed oil microcapsule solid powder. The gelatin and the linseed oil are emulsified respectively and then emulsified together, so that the linseed oil microcapsules are good in shape, easy in capsule diameter control and stable in solvents such as water, dimethyl benzene and the like; after the microcapsules are added into a coating, the light scattering is weak, and the appearance of the coating is not affected; the linseed oil flowing out after the microcapsules are broken can quickly form the films in oxygen to timely repair the scratches.

Description

technical field [0001] The invention relates to a linseed oil microcapsule which can quickly form a film and promptly repair scratches and a preparation method thereof. Background technique [0002] Coatings are a special class of film-forming materials composed of binders and pigments. Due to exposure to the atmosphere, the coating will produce microcracks due to changes in the environment or mechanical properties during use, and the microcracks will gradually spread and expand, thereby accelerating the peeling and delamination of the coating on the metal and coating interface. The man-made damage in the medium reduces the service life and anti-corrosion ability of the coating, and also affects the appearance. Applying self-healing technology to the field of coatings can improve the durability of coatings and drive the rapid development of smart coatings. [0003] The microencapsulation method is currently the most concerned coating self-healing method. It disperses the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C09D191/00B01J13/02
Inventor 洪宗国余莹莹汪盛藻姜美佳林安
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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