阅读说明：本技术 一种蓝色颜料的制作方法 (Preparation method of blue pigment ) 是由 谭俊 于 2021-01-05 设计创作，主要内容包括：本发明公开了一种蓝色颜料的制作方法,包括提取过滤得蝶豆花溶液、加入膨松剂和环氧树脂、加入食用碱调pH值、加入淀粉得稠桨状蓝色颜料及储存几个过程,此外,在蓝色颜料中还加入有黄连和氯化钠。本发明使用蝶豆花作为原料,提取出花青素,以此作为蓝色染色剂与淀粉混合制得蓝色颜料,为确保所得颜料的蓝色纯净,在其中加入食用碱。因花青素具有良好的抗氧化性,可使所得颜料的保色时间长,且为了进一步提高其保色时间,在其中加入环氧树脂、氯化钠,颜料的质地致密、稳定,具有一定的粘性,从而使画作能持久保存且不易变色,且能有效抑制霉菌生长,防霉、防菌且具有固色、保鲜的功能,从而使所得颜料持久不褪色,储存时间长。(The invention discloses a method for preparing blue pigment, which comprises the steps of extracting and filtering to obtain sphenoidea solution, adding a swelling agent and epoxy resin, adding edible alkali to adjust the pH value, adding starch to obtain thick paste-shaped blue pigment, and storing, wherein coptis chinensis and sodium chloride are also added into the blue pigment. The invention uses the sphenoides flower as the raw material, extracts the anthocyanin, and mixes the anthocyanin with starch to prepare the blue pigment, and in order to ensure the purity of the blue color of the obtained pigment, edible alkali is added into the pigment. The anthocyanin has good oxidation resistance, so that the color retention time of the obtained pigment is long, and in order to further improve the color retention time, the epoxy resin and the sodium chloride are added, so that the pigment has compact and stable texture and certain viscosity, the painting can be stored for a long time and is not easy to change color, the growth of mold can be effectively inhibited, the paint is mildew-proof and antibacterial, and the paint has the functions of color fixation and fresh keeping, so that the obtained pigment is not faded for a long time, and the storage time is long.)

1. The preparation method of the blue pigment is characterized by comprising the following steps:

s1: boiling the clitoria terniflora in boiling water for 30-60 min, and filtering to remove the clitoria terniflora to obtain a clitoria terniflora solution;

s2: adding a swelling agent and epoxy resin into the sphenoidea solution;

s3: adding edible alkali into the butterflybush flower solution, and adjusting the pH value to be more than 11;

s4: adding starch into the sphenoidea solution while stirring to uniformly mix the solution with the sphenoidea solution, and stopping adding the starch when the solution becomes thick paste to obtain a blue pigment;

s5: and (4) sealing and storing the blue pigment in dark.

2. The method for producing a blue pigment according to claim 1, wherein: the filtering adopts molecular sieve filtering, the filtering comprises primary filtering and secondary filtering, the first filtering removes the sphenoidea flower, the secondary filtering removes the residual part of the sphenoidea flower remained in the solution, so that no other impurities exist in the obtained sphenoidea flower solution.

3. The method for producing a blue pigment according to claim 1, wherein: coptis chinensis is also added into the blue pigment.

4. A method for producing a blue pigment according to claim 3, characterized in that: sodium chloride is also added into the blue pigment.

5. The method for producing a blue pigment according to claim 4, wherein: the weight ratio of the butterflybush flower to the swelling agent to the epoxy resin to the coptis chinensis to the sodium chloride is 1:1:1:0.5: 0.8.

Technical Field

The invention relates to the technical field of pigment preparation, in particular to a preparation method of a blue pigment.

Background

In the drawing process of oil paintings and landscape paintings, pigments with various colors are often needed to be used for coloring the oil paintings and the landscape paintings. Blue pigments are the primary color in pigments. Most of blue pigments sold on the market at present are made of chemical raw materials, and the blue pigments after chemical treatment can cause harm to the environment and can also cause harm to the environment in the chemical treatment process.

In addition, when a blue pigment prepared by chemical synthesis using chemical raw materials is used, the blue pigment may remain on the user's body, and if the user touches food with a hand to which the pigment is stuck without cleaning the user, the pigment may enter the human body to cause damage to the human body. Especially, a lot of children begin to study and draw at very small time now, and children eat the pigment by mistake more easily in the drawing process, if the pigment that uses the chemical industry raw materials synthesis, probably cause serious injury to children's health after eating by mistake.

Disclosure of Invention

In view of the above disadvantages, the present invention provides a method for preparing a blue pigment, which is characterized in that the prepared blue pigment is not easy to fade, has good durability, is non-toxic and harmless, and is environment-friendly.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a method for preparing a blue pigment comprises the following steps:

s1: boiling the clitoria terniflora in boiling water for 30-60 min, and filtering to remove the clitoria terniflora to obtain a clitoria terniflora solution;

s2: adding a swelling agent and epoxy resin into the sphenoidea solution;

s3: adding edible alkali into the butterflybush flower solution, and adjusting the pH value to be more than 11;

s4: adding starch into the sphenoidea solution while stirring to uniformly mix the solution with the sphenoidea solution, and stopping adding the starch when the solution becomes thick paste to obtain a blue pigment;

s5: and (4) sealing and storing the blue pigment in dark.

Preferably, the filtering is performed by using a molecular sieve, the filtering comprises primary filtering and secondary filtering, the first filtering removes the sphenoides flower, and the secondary filtering removes the residual part of the sphenoides flower remaining in the solution, so that the obtained solution of the sphenoides flower has no other impurities.

Preferably, coptis chinensis is also added into the blue pigment.

Preferably, sodium chloride is also added into the blue pigment.

Preferably, the ratio of the buttercup flower to the leavening agent to the epoxy resin to the coptis chinensis to the sodium chloride is 1:1:1:0.5: 0.8.

The invention has the beneficial effects that:

1. according to the invention, the Clitoria ternatea flower is placed into boiling water to be steamed and boiled to obtain blue liquid, then starch is added while stirring to form thick paste-shaped pigment, edible alkali is added into the pigment to keep the pH value of the pigment to be more than 11, so that the obtained pigment is ensured to be blue, and the extracted Clitoria ternatea flower solution contains anthocyanin, so that the pigment has good oxidation resistance;

2. according to the invention, the swelling agent is added into the sphenoidea solution to enable the obtained pigment to be fluffy, and after the epoxy resin is added for curing, the obtained pigment is compact, firm and stable in texture and has certain viscosity, so that the painting drawn by using the pigment can be stored for a long time and is not easy to change color.

3. According to the invention, a little coptis chinensis is added into the blue pigment, so that the prepared pigment has bitter taste, and after being eaten by children by mistake, the pigment is not swallowed but is spitted out by the children due to the bitter taste, so that the pigment can be prevented from being eaten by the children by mistake, and the habit that the children do not eat the pigment by mistake in the subsequent pigment using process can be developed.

4. According to the invention, sodium chloride is added into the blue pigment, so that the growth of mould can be effectively inhibited, and the blue pigment is mildew-proof and anti-bacterial and has the functions of color fixation and freshness preservation, so that the obtained pigment is durable and fadeless, and the storage time is long.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in detail with reference to the embodiments.

Example 1:

a method for preparing a blue pigment comprises the following steps:

s1: boiling the clitoria sphenanthera flower in boiling water for 30-60 min, filtering the clitoria sphenanthera flower to obtain a clitoria sphenanthera flower solution, wherein the filtering adopts a molecular sieve for filtering, the filtering comprises primary filtering and secondary filtering, the primary filtering is used for removing the clitoria sphenanthera flower, and the secondary filtering is used for removing the residual part of the clitoria sphenanthera flower in the solution, so that the obtained clitoria sphenanthera flower solution has no other impurities, and thus the prepared blue pigment has pure texture and uniform coloring, and does not have fine particles in the picture making;

s2: adding a swelling agent and epoxy resin into the sphenoidea solution to enable the obtained pigment to be fluffy, adding the epoxy resin to cure, and enabling the obtained pigment to be compact, firm and stable in texture and to have certain viscosity, so that the painting drawn by using the pigment can be stored for a long time and is not easy to change color;

s3: adding edible alkali into the sphenoidea solution, and adjusting the pH value to be more than 11, so as to ensure that the color of the obtained pigment is blue and prevent color difference;

s4: adding starch into the sphenoidea solution while stirring to uniformly mix the solution with the sphenoidea solution, and stopping adding the starch when the solution becomes thick paste to obtain a blue pigment;

s5: and (4) sealing and storing the blue pigment in dark.

Example 2:

steps S1 to S5 are the same as in example 1, except that sodium chloride is added to the blue pigment, which can effectively inhibit the growth of mold, prevent mold and bacteria, and have the functions of color fixation and freshness preservation, so that the obtained pigment is durable and does not fade, and the storage time is long.

The coptis chinensis is also added into the blue pigment, so that the prepared pigment has bitter taste, and after being eaten by children by mistake, the pigment cannot be swallowed by the children due to the bitter taste, but is spit out, so that the pigment can be prevented from being eaten by the children by mistake (although the pigment is nontoxic and harmless), and a habit of not eating the pigment by mistake can be developed by the children in the subsequent pigment using process.

In this embodiment, the ratio of the buttercup flower, the leavening agent, the epoxy resin, the coptis root and the sodium chloride is 1:1:1:0.5: 0.8.

The preparation method comprises the steps of extracting anthocyanin from the butterflybush flower by using the butterflybush flower as a raw material, mixing the anthocyanin serving as a blue coloring agent with starch to prepare the blue pigment, and adding edible alkali into the pigment to ensure that the pH value of the pigment is more than 11 in order to ensure the blue color of the pigment to be pure. The anthocyanin has good oxidation resistance, so that the color retention time of the obtained pigment is long, and in order to further improve the color retention time, the epoxy resin and the sodium chloride are added, the texture is compact, firm and stable, and the pigment has certain viscosity, so that the painting drawn by using the pigment can be stored for a long time and is not easy to change color, the growth of mold can be effectively inhibited, the pigment is mildew-proof and antibacterial, and has the functions of color fixation and freshness preservation, so that the obtained pigment is not faded for a long time and has long storage time.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.