Use of flowers of plants containing anthocyanins and / or leaves of plants containing chlorophyll for the preparation of high temperature resistant pigments

Abstract

The application provides application of flowers of plants containing anthocyanins and / or leaves of plants containing chlorophyll in preparation of high-temperature-resistant pigments, and the high-temperature-resistant pigments are prepared from the flowers of plants containing anthocyanins and the leaves of plants containing chlorophyll. The application provides a high-temperature-resistant pigment, raw materials of which are natural plants, and the high-temperature-resistant pigment can be prepared from plant wastes, has low cost, and an extraction agent ethanol is friendly to organisms and environment, the prepared high-temperature-resistant pigment is non-toxic and harmless, green and environment-friendly, and has good uniformity and stability. The high-temperature-resistant pigment is used for drawing pigments, and discoloration is not obvious under high-temperature weather, and the high-temperature-resistant pigment is convenient to preserve.

Description

Technical Field

[0001] The present invention relates to the field of biomass materials, in particular to the use of flowers of plants containing anthocyanins and / or leaves of plants containing chlorophyll in the preparation of high-temperature-resistant pigments. Background Art

[0002] Wood is an important renewable resource, widely used in construction, furniture, shipbuilding, packaging, and artwork. It can also be used as a biomass energy source for heating and power generation. With the increasing variety of new materials and the growing demand for materials across various industries, wood, a material with a long history of use, also needs to continuously explore new applications and increase its economic value. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the object of the present invention is to provide the use of flowers of plants containing anthocyanins and / or leaves of plants containing chlorophyll in the preparation of high-temperature resistant pigments, so as to solve the technical problems in the prior art that painting pigments are not good for human health and are easy to change color in hot weather.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention is achieved through the following technical solutions.

[0005] The present invention provides use of anthocyanin-containing plant flowers and / or chlorophyll-containing plant leaves in preparing high-temperature-resistant pigments.

[0006] Preferably, the plant containing anthocyanins is from the Rosaceae family, more preferably rose.

[0007] Preferably, the chlorophyll-containing plant is selected from one or more of Moraceae, Oleaceae and Salicaceae. More preferably, the chlorophyll-containing plant is selected from one or more of Bodhi tree, lilac tree and poplar.

[0008] Preferably, the high temperature resistant pigment refers to a pigment that can withstand aging at 60° C. for 1 hour.

[0009] More preferably, after the pigment is aged at 60° C. for 1 hour, the difference in Lab chromaticity compared with the initial value is less than 0.5.

[0010] Preferably, ethanol and / or water are used as extractants to extract the flowers of plants containing anthocyanins and / or the leaves of plants containing chlorophyll, followed by solid-liquid separation and evaporation to dryness.

[0011] More preferably, the flowers of the plant containing anthocyanin and / or the leaves of the plant containing chlorophyll are further subjected to a washing treatment before extraction.

[0012] More preferably, ethanol is used as the extractant to extract the leaves of the chlorophyll-containing plant.

[0013] Further preferably, water is used as the extracting agent to extract the flowers of the plant containing anthocyanins.

[0014] More preferably, the liquid-solid ratio is 5-15 mL / g during the extraction. Further preferably, it is 10 mL / g.

[0015] More preferably, the extraction temperature of the leaves of the plant containing chlorophyll is 5-40℃.

[0016] More preferably, the extraction temperature of the flowers of the plant containing anthocyanins is 5-60℃.

[0017] More preferably, the separation treatment comprises centrifugation at a speed of 3000-8000 r / min. The centrifugation removes macromolecular impurities.

[0018] Further preferably, the centrifugation time is 5 min-10 min.

[0019] More preferably, the separation treatment further comprises filtration.

[0020] The present application also provides a method for improving the high-temperature resistance of drawing pigments, which uses the high-temperature resistant pigment of the flowers of the plant containing anthocyanins and / or the leaves of the plant containing chlorophyll as the pigment source of the drawing pigments.

[0021] Preferably, the plant containing anthocyanins is a Rosaceae.

[0022] Preferably, the plant containing chlorophyll is selected from one or more of Moraceae, Oleaceae and Salicaceae.

[0023] Preferably, the high-temperature resistant pigment refers to a pigment that can resist 60℃ aging for 1 h.

[0024] More preferably, the pigment has a Lab color difference of less than 0.5 after 1 h of aging at 60℃ compared with the initial value.

[0025] The present application also provides a high-temperature resistant drawing pigment, which comprises a high-temperature resistant pigment extracted from the pigment of the flowers of the plant containing anthocyanins and / or the leaves of the plant containing chlorophyll and an auxiliary material.

[0026] Preferably, the plant containing anthocyanins is a Rosaceae.

[0027] Preferably, the plant containing chlorophyll is selected from one or more of Moraceae, Oleaceae and Salicaceae.

[0028] Preferably, the high-temperature resistant pigment refers to a pigment that can resist 60℃ aging for 1 h.

[0029] More preferably, the pigment has a Lab color difference of less than 0.5 after 1 h of aging at 60℃ compared with the initial value.

[0030] Preferably, the adjuvant is ethanol and / or water.

[0031] Preferably, the mass percentage of the high-temperature-resistant pigment in the high-temperature-resistant drawing pigment is 0.1-15%. It can be 0.1%, 0.112%, 0.2%, 0.237%, 0.5%, 0.628%, 1.0%, 3.0%, 5.0%, 7.0%, 9.0%, 11.0%, 11.11%.

[0032] The application provides a use of flowers of plants containing anthocyanins and / or leaves of plants containing chlorophyll in preparation of high-temperature-resistant pigment, raw materials of which are natural plants, and plant wastes can be used, cost is low, an extracting agent ethanol is friendly to organisms and environment, the prepared high-temperature-resistant pigment is non-toxic and harmless, green and environment-friendly, and has good uniformity and stability. The high-temperature-resistant pigment is used in drawing pigment, and discoloration is not obvious in high-temperature weather, and is convenient to preserve. DETAILED DESCRIPTION

[0033] The following specific examples illustrate the embodiments of the application, and those skilled in the art can easily understand other advantages and effects of the application from the disclosure.

[0034] Before further describing the embodiments of the application, it should be understood that the scope of protection of the application is not limited to the following specific embodiments; it should also be understood that the terms used in the embodiments of the application are for the purpose of describing the specific embodiments, but not for limiting the scope of protection of the application. The test methods in the following examples are not specified, and are usually carried out according to the conventional conditions or the conditions recommended by the manufacturers.

[0035] When the embodiments give numerical ranges, it should be understood that, unless otherwise specified by the application, each numerical range has two endpoints and any number between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the application have the same meaning as generally understood by those skilled in the art. In addition to the specific methods, devices and materials used in the embodiments, any method, device and material of the prior art similar or equivalent to those described in the embodiments of the application can also be used to implement the application according to the master of the prior art and the description of the application by those skilled in the art.

[0036] The applicant provides a new high-temperature-resistant pigment, which extracts natural pigment components from specific natural plants, can be used for wood dye, leaf dye and drawing pigment, belongs to natural pigment, has environmental protection characteristics, and the high-temperature-resistant pigment itself has stability under high-temperature conditions and is not easy to discolor; when it is used as drawing pigment on paper, the formed painting can also withstand high temperature and is not easy to change.

[0037] Example 1

[0038] The present example provides a specific high-temperature-resistant pigment, and the preparation method is as follows:

[0039] Take several pieces of Bodhi leaves, wash the surface with deionized water, and wash until neutral. Cut the leaves, add anhydrous ethanol to completely immerse the surface of the leaves, and stand at room temperature 25℃. When the leaves turn yellow, filter and centrifuge the filtrate at 8000r / min for 10min. Take the supernatant and evaporate at 40℃ to obtain a high-temperature-resistant pigment.

[0040] The present example also provides a specific high-temperature-resistant drawing pigment, and the preparation method is as follows: add 7.91g of anhydrous ethanol to 0.05g of high-temperature-resistant pigment, completely dissolve to obtain a high-temperature-resistant drawing pigment. The mass percentage of high-temperature-resistant pigment in the high-temperature-resistant drawing pigment is 0.628%.

[0041] Example 2

[0042] The present example provides a specific high-temperature-resistant pigment, and the preparation method is the same as that of Example 1.

[0043] The present example also provides a specific high-temperature-resistant drawing pigment, and the preparation method is basically the same as that of Example 1, except that the mass of anhydrous ethanol in the high-temperature-resistant drawing pigment is 0.4g. The mass percentage of high-temperature-resistant pigment in the high-temperature-resistant drawing pigment is 11.11%.

[0044] Example 3

[0045] The present example provides a specific high-temperature-resistant pigment, and the preparation method is the same as that of Example 1.

[0046] The present example also provides a specific high-temperature-resistant drawing pigment, and the preparation method is basically the same as that of Example 1, except that the mass of anhydrous ethanol in the high-temperature-resistant drawing pigment is 21.05g. The mass percentage of high-temperature-resistant pigment in the high-temperature-resistant drawing pigment is 0.237%.

[0047] Example 4

[0048] The present example provides a specific high-temperature-resistant pigment, and the preparation method is the same as that of Example 1.

[0049] The present example also provides a specific high-temperature-resistant drawing pigment, and the preparation method is basically the same as that of Example 1, except that the mass of anhydrous ethanol in the high-temperature-resistant drawing pigment is 44.5g. The mass percentage of high-temperature-resistant pigment in the high-temperature-resistant drawing pigment is 0.112%.

[0050] Example 5

[0051] This embodiment provides a specific high-temperature resistant pigment, and the preparation method is basically the same as that of Example 1, except that the centrifugal speed is 5000 r / min.

[0052] This embodiment also provides a specific high-temperature resistant painting pigment, and the preparation method is the same as that of Example 1.

[0053] Example 6

[0054] This embodiment provides a specific high-temperature resistant pigment, and the preparation method is basically the same as that of Example 1, except that the centrifugal speed is 3000 r / min.

[0055] This embodiment also provides a specific high-temperature resistant painting pigment, and the preparation method is the same as that of Example 1.

[0056] Example 7

[0057] This embodiment provides a specific high temperature resistant pigment, and the preparation method is as follows:

[0058] Take several rose petals, rinse their surface with deionized water, and wash until neutral, put them into deionized water until the liquid surface completely immerses the petals, and let them stand at room temperature of 25°C. When the color of the rose petals has completely faded, filter them, and centrifuge the filtrate at a centrifugal speed of 8000r / min and a centrifugal time of 10min. Take the supernatant and evaporate it to dryness at 40°C to obtain a high-temperature resistant pigment.

[0059] This embodiment provides a specific high temperature resistant painting pigment, and the preparation method is as follows:

[0060] 7.91 g of water was added to 0.05 g of natural pigment and mixed evenly to obtain a high-temperature resistant painting pigment. The mass percentage of the high-temperature resistant pigment in the high-temperature resistant painting pigment was 0.628%.

[0061] Example 8

[0062] This embodiment provides a specific high-temperature resistant pigment, and the preparation method is basically the same as that of Example 7, except that: during extraction, the standing temperature is 60°C.

[0063] Example 9

[0064] This embodiment provides a specific high-temperature resistant pigment, and the preparation method is basically the same as that of Example 7, except that: during extraction, the standing temperature is 40°C.

[0065] Comparative Example 1

[0066] 7.835 g of deionized water was added to 0.125 g of acrylic paint (content 40%, ARTSIR formaldehyde-free acrylic paint (yellow-green), purchased from Hebei Qingzhu Art Materials Technology Co., Ltd.) and completely dissolved to obtain an acrylic paint liquid.

[0067] Comparative Example 2

[0068] 7.835 g of deionized water was added to 0.125 g of acrylic paint (content 40%, ARTSIR formaldehyde-free acrylic paint (purple), purchased from Hebei Qingzhu Art Materials Technology Co., Ltd.) and completely dissolved to obtain an acrylic paint liquid.

[0069] The high temperature resistant painting pigments prepared in Examples 1 and 7 and the acrylic paint liquids prepared in Comparative Examples 1 and 2 were tested for colorimetry. The test method is as follows:

[0070] Using a brush, draw a line on paper using the heat-resistant paints prepared in Examples 1 and 11 and the acrylic paints prepared in Comparative Examples 1 and 2. After drying completely, the color values ​​were measured using a colorimeter (NIPPON DENSHOKU, model ND120) and the color data were recorded. The paper was then placed in a forced-air drying oven at 60°C for one hour. After returning to room temperature (25°C), the color data was measured again using a colorimeter. Comparing the color data from the two experiments, a greater difference indicates a more pronounced discoloration.

[0071] Table 1

[0072]

[0073] Note: L* represents brightness, a* represents red and green, and b* represents yellow and blue

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. Use of rose flowers and / or bodhi leaves in the preparation of a heat-resistant pigment; the pigment is aged at 60°C for 1 hour, and the Lab chromaticity difference compared with the initial value is less than 0.

5.

2. A method for improving the high-temperature resistance of a paint, comprising using a high-temperature-resistant pigment from rose flowers and / or bodhi tree leaves as a pigment source for the paint; The pigment is aged at 60° C. for 1 hour, and the difference in Lab chromaticity compared with the initial color is less than 0.

5.

3. A high temperature resistant painting pigment, characterized in that: The invention comprises a high-temperature resistant pigment and auxiliary materials, wherein the high-temperature resistant pigment is extracted from the flowers of roses and / or the leaves of bodhi trees; The pigment is aged at 60° C. for 1 hour, and the difference in Lab chromaticity compared with the initial color is less than 0.

5.

4. The high temperature resistant painting pigment according to claim 3, characterized in that: The auxiliary material is ethanol and / or water; And / or, the mass percentage of the high temperature resistant pigment in the high temperature resistant painting pigment is 0.1-15%.

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