CN111117486A - Anti-ultraviolet heat-resistant natural raw lacquer film and preparation method thereof - Google Patents
Anti-ultraviolet heat-resistant natural raw lacquer film and preparation method thereof Download PDFInfo
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- CN111117486A CN111117486A CN202010015548.9A CN202010015548A CN111117486A CN 111117486 A CN111117486 A CN 111117486A CN 202010015548 A CN202010015548 A CN 202010015548A CN 111117486 A CN111117486 A CN 111117486A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D193/00—Coating compositions based on natural resins; Coating compositions based on derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The application discloses an anti-ultraviolet heat-resistant natural raw lacquer film which comprises melanin particles and natural raw lacquer. The invention overcomes the defect of poor ultraviolet resistance of the traditional natural raw lacquer by utilizing the characteristic that melanin particles absorb ultraviolet rays, thereby obtaining the heat-resistant natural raw lacquer film with good ultraviolet resistance.
Description
Technical Field
The application relates to an anti-ultraviolet heat-resistant natural raw lacquer film and a preparation method thereof, belonging to the field of coatings.
Background
Natural raw lacquer, also known as Chinese lacquer or Chinese lacquer, is a natural coating with excellent comprehensive properties. The raw lacquer is a pure natural milky white liquid secreted by lacquer trees, the color of the raw lacquer gradually changes brown after contacting oxygen, and the surface of the raw lacquer gradually hardens into a film. Paint films have excellent corrosion resistance, abrasion resistance, durability and other properties, and are the first natural resins used by humans. However, it has some disadvantages, such as poor anti-ultraviolet performance, cracking of the paint film quickly under the irradiation of sunlight when the paint film is used outdoors, and the unsaturated side chains and alcoholic hydroxyl groups in the paint film are easily oxidized and decomposed under the irradiation of ultraviolet light, resulting in the damage, yellowing, chalking and the like of the paint film. The disadvantages of natural raw lacquer limit its application scope.
However, no solution to the problem of how to improve the uv resistance of paint films has been provided so far in the field of natural raw paint film preparation.
Disclosure of Invention
According to one aspect of the application, a natural raw lacquer film with ultraviolet absorption performance is provided, and the defect of poor ultraviolet resistance of the traditional natural raw lacquer is overcome by utilizing the characteristic that melanin particles absorb ultraviolet rays, so that a natural raw lacquer film with good ultraviolet resistance and good heat resistance is obtained.
In one aspect of the application, an ultraviolet-resistant and heat-resistant natural raw lacquer film is provided, which comprises melanin particles and natural raw lacquer.
An anti-ultraviolet heat-resistant natural raw lacquer film comprises melanin granules and natural raw lacquer.
Optionally, the melanin granules include natural melanin granules and artificial melanin granules.
Optionally, the natural melanin granules are extracted from animals and plants, and the artificial melanin granules are obtained by biological fermentation or chemical synthesis.
Alternatively, the artificial melanin granules can be prepared by methods well known to those skilled in the art, and one preferred method is listed below: placing 2.0-10.0 g of dopamine hydrochloride in a magnetic stirrer at 30-50 ℃ under the condition of an alkaline solution, reacting for more than 12 hours, carrying out suction filtration, and drying to obtain the artificial melanin particles.
Optionally, the natural raw lacquer is selected from at least one of Ankang lacquer, plain lacquer, city lacquer, Mao dam lacquer and Qinling lacquer.
Optionally, the content of each component is:
0.1-20 parts by weight of melanin particles;
80-99.9 parts of natural raw lacquer.
Optionally, the natural raw lacquer film is 150-200 microns thick.
In particular, in the anti-ultraviolet heat-resistant natural raw lacquer film, the melanin particles have stronger ultraviolet absorption capability and light-heat conversion capability, so that the anti-ultraviolet capability and the heat resistance of the raw lacquer can be improved.
In another aspect of the present application, there is also provided a preparation method for preparing the above-mentioned ultraviolet-resistant and heat-resistant natural raw paint film, the method at least comprises the following steps: and coating the mixture containing the melanin particles and the natural raw lacquer to obtain the anti-ultraviolet heat-resistant natural raw lacquer film.
Alternatively, the coating may be achieved by means commonly used in the art, such as brushing, rolling, and the like.
Specifically, the natural raw lacquer film can be improved in ultraviolet resistance and heat resistance by adding the melanin particles, and the melanin particles have the capacity of absorbing ultraviolet rays and can be used for improving the ultraviolet resistance and the heat resistance of the lacquer film.
Optionally, at least the following steps are included: putting 0.1-20 parts by weight of melanin particles and 80-99.9 parts by weight of natural raw lacquer into a reactor, and stirring and mixing uniformly at 10-60 ℃; coating and drying to obtain the anti-ultraviolet heat-resistant natural raw lacquer film.
Optionally, the drying conditions are: and drying for 25-35 days at room temperature.
Optionally, the drying conditions are: drying for 0.5-8 h at 60-180 ℃.
Preferably, the method for preparing the above-mentioned natural raw lacquer film comprises at least the steps of: placing 5 parts by weight of melanin particles and 95 parts by weight of natural raw lacquer into a reactor, stirring and mixing uniformly at room temperature, coating, and drying at room temperature to obtain the anti-ultraviolet heat-resistant natural raw lacquer film.
The beneficial effects that this application can produce include:
(1) according to the anti-ultraviolet heat-resistant natural raw lacquer film provided by the application, the defect of poor ultraviolet resistance of the traditional natural raw lacquer is overcome by using the melanin particles, so that the natural raw lacquer film with good ultraviolet resistance is obtained;
(2) the preparation method of the ultraviolet-resistant heat-resistant natural raw lacquer film is simple to operate and wide in raw material source, and the natural raw lacquer film prepared by the method has excellent ultraviolet resistance and heat resistance due to the fact that the melanin particles are introduced into the natural raw lacquer.
Drawings
FIG. 1 is a thermogravimetric analysis spectrum of the anti-UV heat-resistant natural lacquer film D3 in example 1;
FIG. 2 is a thermogravimetric analysis spectrum of the ultraviolet-resistant heat-resistant natural paint film D0 in comparative example 1.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
The raw materials in the examples of the present application were all purchased commercially, unless otherwise specified.
The analysis method in the examples of the present application is as follows:
the uvioresistant performance is tested by adopting a high-pressure mercury lamp ultraviolet lamp (power: 1kw) to test the light loss ratio of a paint film, and the paint film is irradiated for 10 hours without interruption;
the thermogravimetry is measured by adopting a thermogravimetric analyzer STA449 of Germany Steed science and technology Co., Ltd, the temperature rise speed is 10 degrees/min under the nitrogen atmosphere, and the temperature rise range is as follows: room temperature to 650 ℃.
The hardness of the paint film is tested by a pencil method according to GB/T6739-1996, the flexibility is tested by a GB1731-79 paint film elasticity tester, and the glossiness is tested by a JFL-B60o type glossiness tester for the gloss loss rate.
The natural raw lacquer is Mao-Ba lacquer, purchased from Delong raw lacquer science and technology Limited liability company in Lichuan;
the film thickness of the obtained raw paint film is 150-200 microns.
In the examples of the present application, the light loss ratio is (a 0-a 1)/a0
A0-gloss measurement before aging, A1-gloss measurement after aging.
The artificially synthesized melanin granules in the embodiment of the application are prepared by the following method:
and (3) placing 5.0g of dopamine hydrochloride in a magnetic stirrer at 40 ℃ under the condition of an alkaline solution, reacting for 12 hours, carrying out suction filtration, and drying to obtain the artificial melanin particles.
Comparative example 1 preparation of a Natural raw lacquer film
Coating 10.0g of natural raw lacquer with the thickness of 150 microns, drying at high temperature of 120 ℃ for 3h, taking out, and continuously drying at room temperature for more than 7 days to obtain a natural raw lacquer film which is marked as D0.
Thermogravimetric analysis was performed on the sample D0 by using a thermogravimetric analyzer, and the result is shown in fig. 2, where the temperature at 50% weight loss is 435 ℃; the residual rate at 600 ℃ was 16.7%.
Example 1 preparation of a Natural raw paint film with UV and Heat resistance
Adding 0.01 g of artificially synthesized melanin granules into 9.99 g of natural raw lacquer, placing the mixture into a reactor, and stirring and mixing the mixture uniformly at normal temperature;
and (3) coating, wherein the thickness of the coating is 150 microns, the coating is taken out after being dried at the high temperature of 120 ℃ for 3 hours and dried, and the coating is continuously dried for more than 7 days at room temperature to obtain the anti-ultraviolet heat-resistant natural raw lacquer film which is marked as D1.
The thermogravimetric analysis result shows that the temperature of 50% weight loss is 439 ℃; the residual rate at 600 ℃ was 17.4%.
Example 2 preparation of a Natural raw paint film with UV and Heat resistance
Adding 0.2 g of artificially synthesized melanin granules into 9.8 g of natural raw lacquer, placing the mixture into a reactor, and stirring and mixing the mixture uniformly at normal temperature;
and (3) coating, wherein the thickness of the coating is 150 microns, the coating is taken out after being dried at the high temperature of 120 ℃ for 3 hours and dried, and the coating is continuously dried for more than 7 days at room temperature to obtain the anti-ultraviolet heat-resistant natural raw lacquer film which is marked as D2.
The thermogravimetric analysis result shows that the temperature of 50% weight loss is 454 ℃; the residual rate at 600 ℃ was 25.3%.
Example 3 preparation of a Natural raw paint film with UV and Heat resistance
Adding 0.5 g of artificially synthesized melanin granules into 9.5 g of natural raw lacquer, placing the mixture into a reactor, and stirring and mixing the mixture uniformly at normal temperature;
and (3) coating, wherein the thickness of the coating is 150 microns, the coating is taken out after being dried at the high temperature of 120 ℃ for 3 hours and dried, and the coating is continuously dried for more than 7 days at room temperature to obtain the anti-ultraviolet heat-resistant natural raw lacquer film which is marked as D3.
The thermogravimetric analysis result shows that the temperature of 50% weight loss is 458 ℃; the 600 ℃ residue rate was 43.9%, as shown in FIG. 1.
Example 4 preparation of a Natural raw paint film with UV and Heat resistance
Adding 1.0 g of artificially synthesized melanin granules into 9.0 g of natural raw lacquer, placing the mixture into a reactor, and stirring and mixing the mixture uniformly at normal temperature;
and (3) coating, wherein the thickness of the coating is 150 microns, the coating is taken out after being dried at the high temperature of 120 ℃ for 3 hours and dried, and the coating is continuously dried for more than 7 days at room temperature to obtain the anti-ultraviolet heat-resistant natural raw lacquer film which is marked as D4.
The thermogravimetric analysis result shows that the temperature of 50% weight loss is 451 ℃; the residual rate at 600 ℃ was 31.3%.
Example 5 preparation of a Natural raw paint film with UV and Heat resistance
2.0 g of artificially synthesized melanin granules are added with 8.0 g of natural raw lacquer and placed in a reactor, and the mixture is stirred and mixed evenly at normal temperature;
and (3) coating, wherein the thickness of the coating is 150 microns, the coating is taken out after being dried at the high temperature of 120 ℃ for 3 hours and dried, and the coating is continuously dried for more than 7 days at room temperature to obtain the anti-ultraviolet heat-resistant natural raw lacquer film which is marked as D5.
The thermogravimetric analysis result shows that the temperature of 50% weight loss is 450 ℃; the residual rate at 600 ℃ was 33.2%.
By comparing the thermogravimetric analysis results of the ultraviolet-resistant and heat-resistant natural raw paint films D1-D5, it can be seen that the heat resistance of the black pigment particles to the raw paint film D0 is obviously improved.
Example 6 Performance testing
Testing the flexibility of the samples D0-D5 according to the method in GB1731-79, and testing the pencil hardness performance of the samples D0-D5 according to the method in GB/T6739-1996; the UV resistance was measured by using a high-pressure mercury lamp UV lamp (power: 1kw) to determine the light-loss ratio, and the results are shown in Table 1.
TABLE 1 flexibility, Pencil hardness Properties and light loss for samples D0-D5
| Sample numbering | Flexibility (mm) | Hardness of pencil | Light loss rate/%) |
| |
10 | |
50％ |
| D1 | 15 | 5H | 49.3％ |
| D2 | 15 | 5H | 42.8％ |
| D3 | 15 | 5H | 38.6％ |
| D4 | 15 | 4H | 22.9％ |
| D5 | 15 | 4H | 18.6％ |
As can be seen from Table 1, the prepared anti-ultraviolet heat-resistant natural raw paint film has good hardness and flexibility, and the anti-ultraviolet performance is improved.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (9)
1. An anti-ultraviolet heat-resistant natural raw lacquer film is characterized by comprising melanin particles and natural raw lacquer.
2. The ultraviolet resistant and heat resistant natural varnish film of claim 1, wherein the melanin particles comprise natural melanin particles and artificial melanin particles.
3. The ultraviolet-resistant heat-resistant natural raw lacquer film according to claim 1, wherein the natural raw lacquer is at least one selected from the group consisting of Ankang lacquer, Pinglie lacquer, city paint, Mao dam lacquer and Qinling mountain lacquer.
4. The ultraviolet-resistant heat-resistant natural raw paint film as claimed in claim 1, wherein the contents of the components are as follows:
0.1-20 parts by weight of melanin particles;
80-99.9 parts of natural raw lacquer.
5. The ultraviolet-resistant heat-resistant natural raw lacquer film as claimed in claim 1, wherein the thickness of the natural raw lacquer film is 150-200 micrometers.
6. Method for preparing a natural varnish film resistant to uv and heat according to any one of claims 1 to 5, characterised in that it comprises at least the following steps: and coating the mixture containing the melanin particles and the natural raw lacquer to obtain the anti-ultraviolet heat-resistant natural raw lacquer film.
7. The method for preparing the anti-ultraviolet heat-resistant natural raw paint film according to claim 6, characterized by comprising at least the following steps: putting 0.1-20 parts by weight of melanin particles and 80-99.9 parts by weight of natural raw lacquer into a reactor, and stirring and mixing uniformly at 10-60 ℃; coating and drying to obtain the anti-ultraviolet heat-resistant natural raw lacquer film.
8. The method for preparing the anti-ultraviolet heat-resistant natural raw paint film according to claim 7, wherein the drying conditions are as follows: and drying for 25-35 days at room temperature.
9. The method for preparing the anti-ultraviolet heat-resistant natural raw paint film according to claim 7, wherein the drying conditions are as follows: drying for 0.5-8 h at 60-180 ℃.
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| CN202010015548.9A CN111117486A (en) | 2020-01-07 | 2020-01-07 | Anti-ultraviolet heat-resistant natural raw lacquer film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112778808A (en) * | 2020-12-30 | 2021-05-11 | 嘉兴聚新航空材料科技有限公司 | Anti-icing super-hydrophobic coating for rotor wing of unmanned aerial vehicle |
| CN114539826A (en) * | 2022-01-18 | 2022-05-27 | 沈阳化工大学 | Preparation method of environment-friendly water-based chromium-free ultraviolet shielding alkali-resistant coating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107286796A (en) * | 2017-06-27 | 2017-10-24 | 江苏华友装饰工程有限公司 | Raw lacquer and preparation method thereof |
| CN107325526A (en) * | 2017-07-10 | 2017-11-07 | 湖北大学 | A kind of ultraviolet compounded film of heat-resistant and preparation method thereof |
-
2020
- 2020-01-07 CN CN202010015548.9A patent/CN111117486A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107286796A (en) * | 2017-06-27 | 2017-10-24 | 江苏华友装饰工程有限公司 | Raw lacquer and preparation method thereof |
| CN107325526A (en) * | 2017-07-10 | 2017-11-07 | 湖北大学 | A kind of ultraviolet compounded film of heat-resistant and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112778808A (en) * | 2020-12-30 | 2021-05-11 | 嘉兴聚新航空材料科技有限公司 | Anti-icing super-hydrophobic coating for rotor wing of unmanned aerial vehicle |
| CN114539826A (en) * | 2022-01-18 | 2022-05-27 | 沈阳化工大学 | Preparation method of environment-friendly water-based chromium-free ultraviolet shielding alkali-resistant coating |
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Application publication date: 20200508 |