Preserved flower treatment reagent and preserved flower preparation method thereof

Abstract

The invention provides a preserved fresh flower treatment reagent and a method for preparing preserved fresh flowers, and relates to the technical field of preserved fresh flower preparation. The preserved fresh flower treatment reagent comprises a coloring agent and a post-treatment agent, wherein the coloring agent consists of polyethylene glycol, methanol, dendrophenol and an alcohol-soluble pigment; the post-treatment agent is prepared from ethanol, hydrogenated castor oil, menthol, folic acid and deionized water; during preparation, fresh cut flowers are decolored, then are subjected to high-concentration carbon dioxide standing, are soaked and dyed by adopting a dyeing agent, are subjected to preliminary drying, are soaked for a short time by adopting a post-treatment agent, and are dried. The method overcomes the defects in the prior art, can effectively improve the dyeing uniformity of the preserved fresh flowers, further fixes the color, prevents the color from falling off, prevents the subsequent color fading and deformation of the preserved fresh flowers, and comprehensively improves the storage stability of the preserved fresh flowers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of preserved flower preparation, in particular to a preserved flower treatment reagent and a method for preparing preserved flowers. BACKGROUND

[0002] Preserved flowers, also known as fresh flowers or ecological flowers, are known as "everlasting flowers". They are processed through a series of complex processes such as dehydration, decolorization, drying, and dyeing, and are processed from fresh-cut flowers such as roses, carnations, and hydrangeas. They not only retain the color, shape, and texture of fresh flowers, but also significantly extend the storage time, usually up to 3-5 years, or even longer.

[0003] The existing preserved flowers are almost identical to fresh flowers in terms of shape, and the curling degree of petals and the opening state of flowers maintain natural beauty. In addition, according to the difference in dyeing pigments, flowers with colors that do not exist in natural environments can be prepared to meet individual needs.

[0004] The existing preserved flowers are generally prone to fading or discoloration under high temperature or direct sunlight due to the process. The application number 201810165817.2 discloses a method for making preserved flowers, which performs fixation and preservation after dyeing by strengthening treatment. The formula of the dyeing agent is "green algae extract, chloroacetic acid, polyacrylic compound, aluminum potassium sulfate dodecahydrate, dibutyl phthalate, hydrochloric acid, butylphenyl latex, ferric oxide, colorant, and peroxobenzoic acid hexyl butyl ester", which contains dibutyl phthalate, a toxic and harmful substance that is not conducive to environmental protection if it is in contact with the human body for a long time. In addition, the addition of butylphenyl latex and other substances will cause the petals to thicken, affecting the light texture of the subsequent preserved flowers. In addition, the strengthening liquid is a mixture of bactericides, ultraviolet-proof agents, flavoring agents, and preservatives, and the bactericides are composed of 2-methyl-propyl methyl ester, sodium carbonate, calcium propionate, trichloroisocyanuric acid, organic acid, embedding agent, solubilizer, stabilizer, and antifreeze. The ultraviolet-proof agent is composed of silicon dioxide, zeolite, 2,4-dihydroxybenzophenone, N,N-di-n-butyl nickel dithiocarbamate, guanidine antibacterial agent, 2,4,4'-trichloro-2'-hydroxy diphenyl ether, 8-hydroxyquinoline copper, aluminum zirconium acid ester coupling agent, and polyacrylic acid sodium dispersant. The flavoring agent is composed of fragrance, anhydrous sodium sulfate, anhydrous glucose, and malt dextrin. The preservative is composed of sodium hydroxide, potassium hydroxide, paraffin, sodium molybdate, diatomite, peppermint powder, potassium molybdate, ammonium molybdate, and solubilizer. The overall composition is complex, and many of the components themselves have color, which may cause color differences when preparing other color preserved flowers. In addition, many components (such as 8-hydroxyquinoline copper, 2,4,4'-trichloro-2'-hydroxy diphenyl ether, and 2-methyl-propyl methyl ester) have irritant properties to human skin and mucous membranes, which poses a problem of use safety.

[0005] And the existing preservation of the preserved flower needs to be stored in a dry environment. If the environment humidity is high, the preserved flower is easy to deform or petal to fall off. Therefore, how to ensure the basic quality of the preserved flower and improve the storage stability in various environments is an important research direction at present. SUMMARY

[0006] In view of the deficiencies in the prior art, the present application provides a preserved flower treatment reagent and a method for preparing the preserved flower, which can effectively improve the dyeing uniformity of the preserved flower, and further fix the color and prevent the preserved flower from fading and deforming, thereby comprehensively improving the storage stability of the preserved flower.

[0007] To achieve the above object, the technical scheme of the present application is realized by the following technical scheme: A preserved flower treatment reagent, the preserved flower treatment reagent is a dyeing agent and a post-treatment agent; the dyeing agent is composed of the following weight parts of substances: polyethylene glycol 40-45 parts, methanol 60-65 parts, dendrophenol 2-4 parts, alcohol-soluble pigment 1-10 parts; the post-treatment agent is composed of the following weight parts of substances: ethanol 16-20 parts, hydrogenated castor oil 4-6 parts, menthol 2-4 parts, folic acid 2-4 parts, deionized water 8-10 parts.

[0008] Preferably, the preparation method of the dyeing agent is to dissolve dendrophenol in methanol, and then mix polyethylene glycol and alcohol-soluble pigment to obtain a uniform mixture.

[0009] Preferably, the preparation method of the post-treatment agent comprises the following steps: S1, dissolving folic acid in deionized water, then mixing ethanol and menthol, ultrasonic homogenization, obtaining a mixture for standby; S2, dropwise adding hydrogenated castor oil to the mixture, stirring while dropping, after the dropwise adding is completed, continuing to stir at a speed of 1200-1400 r / min under ice water bath for 15-20 min, obtaining a mixed emulsion as the post-treatment agent.

[0010] Preferably, the power of ultrasonic homogenization in step S1 is 400-600 W, and the homogenization time is 10-15 min.

[0011] Preferably, the dropwise adding rate of stirring while dropping in step S2 is 2-5 mL / min, and the stirring speed is 600-800 r / min.

[0012] The method for preparing the preserved flower comprises the following steps: (1) selecting high-quality, healthy, and well-opened fresh flowers for standby; (2) preparing a decolorizing solution by compounding sodium chlorite, 80% methanol solution and citric acid, and placing the fresh flowers in the decolorizing solution for decolorizing treatment to obtain decolorized fresh flowers for standby; (3) the decolorized fresh flowers are cleaned with methanol, and then placed in a sealed device, the carbon dioxide concentration in the sealed device is adjusted to 1-2%, and the treatment is performed for 30-40 min, and then the decolorized fresh flowers are taken out and reserved; (4) the pretreated decolorized fresh flowers are immersed in a dyeing agent for dyeing treatment, and the dyed fresh flowers are reserved; (5) the dyed fresh flowers are placed in a drying room, the humidity is controlled to be 30-35%, and the dyed fresh flowers are dried for 1-2 d, then the dyed fresh flowers are immersed in a post-treatment agent for treatment for 2-5 s, and then taken out, and the dyed fresh flowers are continuously treated in the drying room for 3-5 d, and then the preserved flowers are obtained.

[0013] Preferably, the mass ratio of the components in the decoloring solution in the step (2) is citric acid:sodium chlorite:80% methanol solution = 5:1:150.

[0014] Preferably, the time for the decoloring treatment in the step (2) is 10-15 d.

[0015] Preferably, the time for the dyeing treatment in the step (4) is 18-24 h.

[0016] The application provides a preserved flower treatment reagent and a method for preparing preserved flowers by using the preserved flower treatment reagent. The application adopts a dyeing agent and a post-treatment agent as the preserved flower treatment reagent, wherein a certain proportion of polyethylene glycol and methanol is set in the dyeing agent, and additional dendrophenol is added, so that the texture of the petals is effectively ensured to be soft, and the fading is effectively prevented; in addition, the emulsion prepared from ethanol, hydrogenated castor oil, menthol, folic acid and deionized water is used as the post-treatment agent, so that the fading and deformation of the preserved flowers after dyeing can be further prevented; and the application performs high-concentration carbon dioxide treatment on the flowers after decoloring, so that the uniformity of subsequent dyeing can be effectively improved; in combination with the use of the post-treatment agent, the flower shape can be maintained in a high-humidity environment, and the decoration value of the preserved flowers is comprehensively improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic diagram of group 1 preserved flowers before decoloring, before high-temperature and high-humidity treatment, and after high-temperature and high-humidity treatment in the embodiment of the application; Figure 2 FIG. 2 is a schematic diagram of group 2 preserved flowers before decoloring, before high-temperature and high-humidity treatment, and after high-temperature and high-humidity treatment in the embodiment of the application; Figure 3 FIG. 3 is a schematic diagram of group 3 preserved flowers before decoloring, before high-temperature and high-humidity treatment, and after high-temperature and high-humidity treatment in the embodiment of the application; Figure 4 FIG. 4 is a schematic diagram of group 4 preserved flowers before decoloring, before high-temperature and high-humidity treatment, and after high-temperature and high-humidity treatment in the embodiment of the application. DETAILED DESCRIPTION

[0018] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Embodiment 1:

[0019] Preparation of each reagent in the process of the preserved flower: 1. Preparation of the decolorizing solution: Prepare the materials according to the mass ratio of citric acid: sodium chlorite: 80% methanol solution = 5:1:150; Dissolve the sodium chlorite in the 80% alcohol solution by stirring to obtain a sodium chlorite solution; Dissolve the citric acid in the sodium chlorite solution by stirring to obtain the decolorizing solution.

[0020] 2. Preparation of the dyeing agent: 2.1. Preparation of the dyeing agent-1: (1) Prepare the materials according to the following weight parts: polyethylene glycol 42 parts, methanol 62 parts, shanhuphol 3 parts, and alcohol-soluble pigment 5 parts; (2) Dissolve the shanhuphol in the methanol, and then mix the polyethylene glycol and the alcohol-soluble pigment by stirring to obtain the dyeing agent-1.

[0021] 2.2. Preparation of the dyeing agent-2: (1) Prepare the materials according to the following weight parts: polyethylene glycol 42 parts, methanol 62 parts, and alcohol-soluble pigment 5 parts; (2) Mix the methanol, the polyethylene glycol and the alcohol-soluble pigment by stirring to obtain the dyeing agent-2.

[0022] 3. Preparation of the post-treatment agent: (1) Prepare the materials according to the following weight parts: ethanol 18 parts, hydrogenated castor oil 5 parts, menthol 3 parts, folic acid 3 parts, and deionized water 9 parts; (2) Dissolve the folic acid in the deionized water, and then mix the ethanol and the menthol, and ultrasonically homogenize the mixture at a power of 400 W for 15 min to obtain a mixture for standby; (3) Add the hydrogenated castor oil to the mixture at a rate of 5 mL / min while stirring at a speed of 700 r / min, and continue to stir at a speed of 1400 r / min in an ice water bath for 15 min after the addition is completed to obtain a mixed emulsion as the post-treatment agent-1. Embodiment 2:

[0023] Preparation of the preserved flower: (1) Select high-quality, healthy, and well-blooming fresh flowers for use; (2) Transfer the fresh flowers to the decolorizing liquid within 24 hours and soak them well to avoid dehydration and floating. Cover the lid and observe the white flowers in the decolorizing pool (the time is about 10-15 days). After that, take out the flowers and obtain the decolorized fresh flowers; (3) Transfer the decolorized fresh flowers to methanol for soaking and cleaning for 24 hours. Then place them in a sealed device, adjust the carbon dioxide concentration in the sealed device to 1.5%, and stand for 35 minutes. After that, take out the flowers and obtain the pretreated decolorized fresh flowers for use; (4) Soak the pretreated decolorized fresh flowers in the dyeing agent for dyeing treatment, and obtain the dyed fresh flowers for use; (5) Place the dyed fresh flowers in a drying room and control the humidity to 30% for drying for 2 days. Then soak the dyed fresh flowers in the post-treatment agent for 5 seconds, take them out, and continue to treat them in the drying room for 5 days to obtain the preserved flowers. Comparative Example 1:

[0024] Preparation of preserved flowers: (1) Select high-quality, healthy, and well-blooming fresh flowers for use; (2) Transfer the fresh flowers to the decolorizing liquid within 24 hours and soak them well to avoid dehydration and floating. Cover the lid and observe the white flowers in the decolorizing pool (the time is about 10-15 days). After that, take out the flowers and obtain the decolorized fresh flowers; (3) Transfer the decolorized fresh flowers to methanol for soaking and cleaning for 24 hours to obtain the pretreated decolorized fresh flowers for use; (4) Soak the pretreated decolorized fresh flowers in the dyeing agent for dyeing treatment, and obtain the dyed fresh flowers for use; (5) Place the dyed fresh flowers in a drying room and control the humidity to 30% for drying for 2 days. Then soak the dyed fresh flowers in the post-treatment agent for 5 seconds, take them out, and continue to treat them in the drying room for 5 days to obtain the preserved flowers. Comparative Example 2:

[0025] Preparation of preserved flowers: (1) Select high-quality, healthy, and well-blooming fresh flowers for use; (2) Transfer the fresh flowers to the decolorizing liquid within 24 hours and soak them well to avoid dehydration and floating. Cover the lid and observe the white flowers in the decolorizing pool (the time is about 10-15 days). After that, take out the flowers and obtain the decolorized fresh flowers; (3) Transfer the decolorized fresh flowers to methanol for soaking and cleaning for 24 hours. Then place them in a sealed device, adjust the carbon dioxide concentration in the sealed device to 1.5%, and stand for 35 minutes. After that, take out the flowers and obtain the pretreated decolorized fresh flowers for use; (4) Soak the pretreated decolorized fresh flowers in the dyeing agent for dyeing treatment, and obtain the dyed fresh flowers for use; (5) The dyed fresh flowers are placed in a drying room, and the humidity is controlled at 30% for drying for 7 days to obtain the preserved flowers. Detection:

[0026] The plateau red rose is used as the experimental fresh flower material, and the petals are selected to be thick, evenly distributed, round, and free of cracks. The flower center is round and centered. There are no pests and diseases, such as horse bites, spots, and sunburned flowers, and the diameter of the flower type is controlled to be 8-10 cm.

[0027] Different groups of preserved flowers (5 flowers in each group) are prepared by the methods of Example 2, Example 3 and Comparative Example 1, respectively. Gardenia blue pigment is selected as the alcohol-soluble pigment, and the bleaching time is controlled for 15 days. The preparation methods of different groups of preserved flowers, the selection of dyeing agents and post-treatment agents are shown in Table 1 as follows: Table 1

[0028] After dyeing, the diameters of the preserved flowers in each group are measured, and the values of brightness (L*), red-green deviation (a*) and yellow-blue deviation (b*) are detected by a color difference meter. Then, the preserved flowers in each group are placed in an environment with a temperature of 45°C and a humidity of 85% for 10 days (high temperature and high humidity treatment), and then taken out again for measurement of the diameter and detection by a color difference meter. The specific results are shown in Tables 2 and 3 as follows: Table 2 Average diameters of preserved flowers in each group before and after high temperature and high humidity treatment

[0029] Table 3 Average values of colorimeter test results of preserved flowers in each group before and after high temperature and high humidity treatment

[0030] From the above table, it can be seen that the diameter of the preserved flowers in group 1 changes less after high temperature and high humidity treatment. In addition, for the preserved flowers dyed blue, the L* value is usually low, and the L* value is generally between 20-40 according to the difference of the dye, and the smaller the value, the darker the color (usually also indicates that the color is deeper, and if the color fades, the L* will increase accordingly). The a* value is basically between -5 and 5, usually close to 0, and the basic value deviation is caused by the presence of impurities in the dye reagent or incomplete bleaching of the original fresh flowers. The b* mainly represents the yellow-blue deviation, and when the value is negative, it means blue, and the larger the negative value, the deeper the blue. From Table 3 above, it can be seen that after high temperature and high humidity treatment, the L* and b* of group 1 change less, indicating that the color retention effect is good, while the L* and b* of groups 3 and 4 change more, indicating that there is a certain degree of fading. In summary, the process and dyeing agent-1 of Example 2 in group 1 can significantly ensure the stability of the flower type and prevent fading of the preserved flowers, and comprehensively improve the quality of the preserved flowers.

[0031] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A reagent for treating preserved flowers, characterized in that, The preserved flower treatment reagents are dyeing agents and post-treatment agents; The dyeing agent is composed of the following components by weight: 40-45 parts polyethylene glycol, 60-65 parts methanol, 2-4 parts dendrobium phenol, and 1-10 parts alcohol-soluble pigment; the post-treatment agent is composed of the following components by weight: 16-20 parts ethanol, 4-6 parts hydrogenated castor oil, 2-4 parts menthol, 2-4 parts folic acid, and 8-10 parts deionized water.

2. The preserved flower treatment reagent according to claim 1, characterized in that: The dye is prepared by dissolving dendrobium phenol in methanol, then mixing it with polyethylene glycol and an alcohol-soluble pigment and stirring until homogeneous.

3. The preserved flower treatment reagent according to claim 1, characterized in that, The preparation method of the post-treatment agent includes the following steps: S1. Dissolve folic acid in deionized water, then mix with ethanol and menthol, and homogenize by sonication to obtain a mixture for later use. S2. Add hydrogenated castor oil dropwise to the mixture while stirring. After the addition is complete, continue stirring at a speed of 1200-1400 r / min for 15-20 min in an ice-water bath to obtain a mixed emulsion as a post-treatment agent.

4. The preserved flower treatment reagent according to claim 3, characterized in that: In step S1, the power of ultrasonic homogenization is 400-600W, and the homogenization time is 10-15min.

5. The preserved flower treatment reagent according to claim 3, characterized in that: In step S2, the dropping rate while stirring is 2-5 mL / min, and the stirring speed is 600-800 r / min.

6. A method for preparing preserved flowers using the preserved flower treatment reagent as described in any one of claims 1-3, characterized in that, The method for preparing preserved flowers includes the following steps: (1) Select high-quality, healthy flowers that are in good bloom for later use; (2) Prepare a decolorizing solution by mixing sodium chlorite, 80% methanol solution and citric acid. Place fresh flowers in the decolorizing solution for decolorization treatment to obtain decolorized fresh flowers for later use. (3) The decolorized fresh flowers are washed with methanol, then placed in a sealed device, the carbon dioxide concentration in the sealed device is adjusted to 1%-2%, and treated for 30-40 minutes. After that, they are taken out and the pre-treated decolorized fresh flowers are ready for use. (4) Immerse the pretreated and decolorized fresh flowers in a dyeing agent for dyeing treatment to obtain dyed fresh flowers for later use; (5) Place the dyed flowers in a drying room and dry them at a humidity of 30%-35% for 1-2 days. Then immerse the dyed flowers in a post-treatment agent for 2-5 seconds and take them out. Continue to treat them in the drying room for 3-5 days to obtain preserved flowers.

7. The method for preparing preserved flowers according to claim 6, characterized in that: In step (2), the mass ratio of each component in the decolorizing solution is citric acid: sodium chlorite: 80% methanol solution = 5:1:

150.

8. The method for preparing preserved flowers according to claim 6, characterized in that: The decolorization process in step (2) takes 10-15 days.

9. The method for preparing preserved flowers according to claim 6, characterized in that: The staining treatment time in step (4) is 18-24 hours.

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