Water-soluble turmeric and high-speed emulsification preparation process thereof

Abstract

The invention belongs to the field of A23L1 / 275, and particularly relates to water-soluble turmeric and a high-speed emulsification preparation process thereof. The water-soluble turmeric disclosed by the invention is prepared from the following raw materials: an emulsifier, a solvent and curcumin. Wherein the mass ratio of the emulsifier to the solvent to the curcumin is (5-10): (1-2): 1; the color value of the water-soluble turmeric is not less than 100. In the preparation process of the water-soluble turmeric, a heating assisted dissolution method is not adopted, but a high-speed emulsification embedding technology is selected, so that active components in the curcumin cannot be damaged, the storage stability of the product is further improved, and the product can be stored for more than 2 years at normal temperature.

Description

Technical Field

[0001] The invention belongs to the field of A23L1 / 275, and more specifically relates to a water-soluble turmeric and a high-speed emulsification preparation process thereof. Background Art

[0002] Curcumin is a natural pigment belonging to the diketone colored substances, mainly including: bisdemethoxycurcumin and tetrahydrocurcumin, demethoxytetrahydrocurcumin, bisdemethoxytetrahydrocurcumin and other substances. Curcumin has the characteristics of strong coloring power, bright color, strong thermal stability, safety and non-toxicity; it is currently widely used in foods such as cakes, beverages, ice cream, and rice wine. Curcumin can inhibit the release of inflammatory factors, reduce inflammatory reactions, and has a certain auxiliary therapeutic effect on rheumatoid arthritis, inflammatory bowel disease, etc.; and curcumin can neutralize free radicals, reduce the damage of oxidative stress to cells and tissues, and has an antioxidant effect. In addition, recent studies have shown that curcumin can reduce the cholesterol and triglyceride levels in the blood, and can inhibit the growth and spread of tumor cells, and has a certain therapeutic effect on various cancers.

[0003] Curcumin is easily soluble in alcohol, but its water solubility and oil solubility are poor, which seriously affects the application range of curcumin. Therefore, water-soluble and oil-soluble curcumin currently have high research value.

[0004] Prior art CN102202652A discloses a method for nanoemulsification of curcumin and its derivatives, which mainly uses ultrasonic technology to increase the solubility of curcumin, but the stability of the ultrasonically treated curcumin solution may decrease to a certain extent, and the process cost is relatively high; modern technology CN103054006A discloses a method for preparing high-concentration water-soluble curcumin, which mainly adopts a heating dissolution-aiding method, but the heating conditions may have a certain destructive effect on the active ingredients of curcumin; prior art CN102283373B discloses a method for preparing a curcumin preparation, wherein the raw materials for the preparation mainly include curcumin, an emulsifier, an emulsifier and an antioxidant, and the preparation is obtained by high-speed emulsification and stirring at room temperature, but the color value of the product is less than 80, the coloring ability is weak and the stability is general. Summary of the invention

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a water-soluble turmeric, the preparation raw materials of which include: an emulsifier, a solvent, and curcumin; the mass ratio of the emulsifier, the solvent, and the curcumin is (5-10): (1-2): 1; and the color value of the water-soluble turmeric is not less than 100.

[0006] Preferably, the color value of the curcumin is greater than 1000.

[0007] More preferably, the color value of the curcumin is 1100.

[0008] Color value, also known as specific absorbance, is one of the important indicators for evaluating natural pigments. Color value refers to the absorbance value of the extract of unit mass of natural pigment raw materials at 1% mass concentration through a 1cm colorimetric dish at the maximum absorption peak. The calculation method is: Af / 100m, where A is the absorbance of the actual test sample, f is the dilution factor, and m is the sample mass. Color value can reflect the pigment content and the coloring ability of the product to a certain extent. However, it does not mean that the higher the color valence of the raw material, the higher the color valence of the product. It is also necessary to comprehensively consider the compounding of other raw materials, as well as the selection of preparation technology and process parameters. In the present invention, the raw material is selected as curcumin with a color valence of 1100, and the color valence of the prepared water-soluble turmeric is not less than 100; compared with the curcumin preparation with a color valence of 70-80 prepared from curcumin with a color valence of 1450.1 reported in the prior art CN102283373B, there is substantial technical progress, mainly due to the selection of specific preparation raw materials and specific process parameters of the present invention, so as to achieve the technical effect of high color valence of water-soluble turmeric.

[0009] Preferably, the emulsifier includes: one or more of Tween 20, Tween 60, Tween 80, monoglycerol fatty acid esters, diglycerol fatty acid esters, polyglycerol fatty acid esters, sucrose fatty acid esters, acetylated monoglycerol fatty acid esters, acetylated diglycerol fatty acid esters, α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin.

[0010] More preferably, the emulsifier is Tween 20.

[0011] Preferably, the solvent includes: one or more of glycerol, propylene glycol, sorbitol, mannitol, lactitol, isopropanol, n-butanol, and anhydrous ethanol.

[0012] More preferably, the solvent is anhydrous ethanol.

[0013] The second aspect of the present invention provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0014] S1. Add emulsifier and curcumin into an emulsification tank and stir to mix;

[0015] S2, adding a solvent to obtain a curcumin solution;

[0016] S3. Use a high-speed emulsifier to emulsify the curcumin solution at high speed, and the curcumin is completely embedded in the emulsifier to obtain water-soluble turmeric.

[0017] Preferably, in the step S1, the stirring speed is 2000-5000 rpm, and the stirring time is 10-30 min.

[0018] Preferably, the stirring temperature in step S1 is room temperature, which is 20-30°C.

[0019] Preferably, the rotation speed of the high-speed emulsification in the step S3 is 5000-8000 rpm, and the time of the high-speed emulsification is 10-20 min.

[0020] Curcumin has poor water solubility and relatively excellent alcohol solubility. Therefore, the present invention preferably dissolves curcumin in anhydrous ethanol, and adds a large amount of emulsifier to increase the water solubility of the product. However, the water solubility of the raw material is still relatively poor. As is known to all, heating conditions can improve the mixing uniformity of the raw materials, but higher temperatures may have a certain effect on the activity of curcumin. Stirring at room temperature will not destroy the activity of curcumin, but it is not conducive to the stability of the product. Therefore, the present invention performs a high-speed emulsification operation step, and the high-speed emulsification stirring at 5000-8000rpm, through the strong shear, impact and turbulence generated between the high-speed rotating rotor and the stator, the curcumin is quickly broken into extremely small particles, which significantly improves the solubility of curcumin in water, ensures that the curcumin is completely embedded by the emulsifier, and the embedded water-soluble turmeric not only improves the bioavailability of curcumin, but also ensures that the color value of the water-soluble turmeric is not less than 100; it also significantly improves the stability of the product. After being stored at 60°C for 3 days, the water-soluble turmeric still does not precipitate or break the emulsion.

[0021] Beneficial Effects

[0022] (i) The raw materials used in the present invention include curcumin, an emulsifier, and a solvent. The raw materials are from a wide range of sources and all meet the requirements of GB2760. The cost is also low, so the prepared water-soluble turmeric can be used in the food industry.

[0023] (ii) The color value of the water-soluble turmeric prepared by the present invention is not less than 100, and as a pigment raw material for food, it has an excellent coloring effect.

[0024] (III) In the process of preparing water-soluble turmeric, the present invention does not use heating conditions, but adopts high-speed emulsification and embedding technology, which can ensure that the active components in curcumin are not destroyed, and curcumin is efficiently embedded by the emulsifier, and the storage stability of the product is further improved, and it can be stored at room temperature for more than 2 years.

[0025] (iv) In the process of preparing the water-soluble turmeric of the present invention, the equipment used includes a high-speed emulsifier, and no ultrasonic equipment and heating equipment are involved. The process is simple, and energy can be effectively saved and production costs can be reduced.

[0026] (V) The water-soluble turmeric provided by the present invention has higher storage stability than similar products on the market, the pigment is not easy to precipitate, and the color value is higher.

[0027] (VI) The water-soluble turmeric prepared by the present invention has excellent water solubility and can be miscible with water in any system ratio, thus solving the technical problem of poor water solubility of curcumin. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the stability of Example 1.

[0029] Figure 2 This is a schematic diagram of the stability of Comparative Example 1.

[0030] Figure 3 This is a schematic diagram of the stability of Comparative Example 2.

[0031] Figure 4 This is a schematic diagram of the stability of Comparative Example 3.

[0032] Figure 5 This is a schematic diagram of the stability of Comparative Example 4.

[0033] Figure 6 Schematic diagram of absorbance of the product of Example 1 being miscible with water.

[0034] Figure 7 This is a schematic diagram of the appearance of the water solubility test of competitor 1.

[0035] Figure 8 This is a schematic diagram of the appearance of the water solubility test of competitor 2. DETAILED DESCRIPTION

[0036] In the following implementation cases, all raw materials are common commercial products, and the color value test is carried out according to the method in national standard 1886.60-2015.

[0037] Example 1

[0038] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 800 g of Tween 20, 100 g of anhydrous ethanol, and 100 g of curcumin, wherein the color value of the curcumin is 1100.

[0039] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0040] S1. Add the emulsifier and curcumin into an emulsification tank and stir at 25°C and 2000 rpm for 30 min to mix well;

[0041] S2, adding a solvent to obtain a curcumin solution;

[0042] S3. The curcumin solution was emulsified at 5000 rpm for 10 min using a high-speed emulsifier, and the curcumin was completely embedded in the emulsifier to obtain water-soluble turmeric.

[0043] In this example, about 0.99 kg of water-soluble turmeric with a color value of 105 was obtained, and the yield of curcumin was about 94.49%. After emulsification, the water-soluble turmeric was left to stand for 2 years, and the appearance did not change. See the schematic diagram for details. Figure 1 .

[0044] The solubility test results of the water-soluble turmeric prepared in this example are shown in the figure. Figure 6 .

[0045] Example 2

[0046] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 700 g of Tween 20, 200 g of anhydrous ethanol, and 100 g of curcumin, wherein the color value of the curcumin is 1100.

[0047] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0048] S1. Add the emulsifier and curcumin into an emulsification tank and stir at 25°C and 2000 rpm for 30 min to mix well;

[0049] S2, adding a solvent to obtain a curcumin solution;

[0050] S3. The curcumin solution was emulsified at 5000 rpm for 30 min using a high-speed emulsifier, and the curcumin was completely embedded in the emulsifier to obtain water-soluble turmeric.

[0051] In this example, about 950 g of water-soluble turmeric with a color value of 104 was obtained, and the yield of curcumin was about 89.8%. After emulsification, the water-soluble turmeric was left to stand for 2 years, and the appearance did not change.

[0052] Example 3

[0053] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 800 g of Tween 20, 90 g of anhydrous ethanol, and 110 g of curcumin, wherein the color value of the curcumin is 1100.

[0054] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0055] S1. Add the emulsifier and curcumin into an emulsification tank and stir at 25°C and 2000 rpm for 30 min to mix well;

[0056] S2, adding a solvent to obtain a curcumin solution;

[0057] S3. The curcumin solution was emulsified at 5000 rpm for 20 min using a high-speed emulsifier, and the curcumin was completely embedded in the emulsifier to obtain water-soluble turmeric.

[0058] In this example, about 0.99 kg of water-soluble turmeric with a color value of 110 was obtained, and the yield of curcumin was about 89.2%. After emulsification, the water-soluble turmeric was left to stand for 2 years, and the appearance did not change.

[0059] Example 4

[0060] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 800 g of Tween 20, 100 g of anhydrous ethanol, and 100 g of curcumin, wherein the color value of the curcumin is 1100.

[0061] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0062] S1. Add the emulsifier and curcumin into an emulsification tank and stir at 25°C and 2500 rpm for 30 min to mix well;

[0063] S2, adding a solvent to obtain a curcumin solution;

[0064] S3. The curcumin solution was emulsified at 6000 rpm for 15 min using a high-speed emulsifier, and the curcumin was completely embedded in the emulsifier to obtain water-soluble turmeric.

[0065] In this example, about 0.99 kg of water-soluble turmeric with a color value of 100 was obtained, and the yield of curcumin was about 90%. After emulsification, the water-soluble turmeric was left to stand for 2 years, and the appearance did not change.

[0066] Comparative Example 1

[0067] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 800 g of Tween 20, 100 g of anhydrous ethanol, and 100 g of curcumin, wherein the color value of the curcumin is 1100.

[0068] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0069] S1. Add the emulsifier and curcumin into an emulsification tank and stir at 60°C and 2000 rpm for 30 min to mix well;

[0070] S2, adding a solvent to obtain a curcumin solution;

[0071] S3. The curcumin solution was emulsified at 5000 rpm for 10 min using a high-speed emulsifier, and the curcumin was completely embedded in the emulsifier to obtain water-soluble turmeric.

[0072] In this example, about 0.99 kg of water-soluble turmeric with a color value of 102 was obtained, and the yield of curcumin was about 91.08%. After emulsification, the water-soluble turmeric was left to stand for 1 year, and the appearance became turbid. The product appearance diagram is shown in Figure 2 .

[0073] Comparative Example 2

[0074] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 800 g of Tween 20, 100 g of anhydrous ethanol, and 100 g of curcumin, wherein the color value of the curcumin is 1100.

[0075] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0076] S1. Put the emulsifier and curcumin into an emulsification tank, and mix them evenly with 25kHz ultrasound for 20 minutes at 25°C and 2000rpm stirring;

[0077] S2, adding a solvent to obtain a curcumin solution;

[0078] S3. The curcumin solution was emulsified at 5000 rpm for 10 min using a high-speed emulsifier, and the curcumin was completely embedded in the emulsifier to obtain water-soluble turmeric.

[0079] In this example, about 0.99 kg of water-soluble turmeric with a color value of 105 was obtained, and the yield of curcumin was about 94.95%. After emulsification, the water-soluble turmeric was left to stand for 1 year, and curcumin precipitated. The product appearance diagram is shown in Figure 3 .

[0080] Comparative Example 3

[0081] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 800 g of Tween 20, 100 g of anhydrous ethanol, and 100 g of curcumin, wherein the color value of the curcumin is 1100.

[0082] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0083] S1. Add the emulsifier and curcumin into an emulsification tank and stir at 60°C and 2000 rpm for 30 min to mix well;

[0084] S2, adding a solvent to obtain a curcumin solution;

[0085] S3. The curcumin solution was emulsified at 2000 rpm using a high-speed emulsifier for 1 h to obtain water-soluble turmeric.

[0086] In this example, about 0.99 kg of water-soluble turmeric with a color value of 80 was obtained. Curcumin could not be completely embedded and was allowed to stand for stratification after emulsification. See the product appearance diagram for details. Figure 4 .

[0087] Comparative Example 4

[0088] In a first aspect of this example, a water-soluble turmeric is provided, wherein the raw materials for its preparation include, by weight, 800 g of Tween 20 and 100 g of curcumin, wherein the color value of the curcumin is 1100.

[0089] The second aspect of this example provides a high-speed emulsification preparation process of water-soluble turmeric, comprising:

[0090] S1. Add the emulsifier and curcumin into an emulsification tank and stir at 60°C and 2000 rpm for 30 min to mix well;

[0091] S2. The curcumin solution was emulsified at 2000 rpm using a high-speed emulsifier for 1 h to obtain water-soluble turmeric.

[0092] In this example, about 0.90 kg of water-soluble turmeric with a color value of 90 was obtained. Curcumin could not be completely embedded and was allowed to stand for stratification after emulsification. See the product appearance diagram for details. Figure 5 .

[0093] Performance Testing

[0094] 1. Emulsion stability test

[0095] Test objects: Examples 1-4, Comparative Examples 1-4.

[0096] Test method: Place the product at different temperatures and observe quality changes such as appearance demulsification and stratification. The test results are detailed in Table 1.

[0097] Table 1

[0098] Refrigerate at 4℃ for 1 year 25℃ normal temperature 1 year Store at 40℃ for 1 month Store at 60℃ for 3 days Example 1 No change No change No change No change Example 2 No change No change No change No change Example 3 No change No change No change No change Example 4 No change No change No change No change Comparative Example 1 Pigment precipitation Pigment precipitation Pigment precipitation Pigment precipitation Comparative Example 2 No change Pigment precipitation Pigment precipitation Pigment precipitation Comparative Example 3 Demulsification Demulsification Demulsification Demulsification Comparative Example 4 Pigmentation Pigmentation Pigmentation Pigmentation

[0099] 2. Solubility Test

[0100] Test object: product of Example 1.

[0101] Test method: Example 1 is miscible with water in any proportion without heating; filtered with a filter membrane with a diameter of 15 cm and a pore size of 0.22 μm, the filtration rate can reach 2 L / min; the absorbance of the ethanol solution and the absorbance of the aqueous solution of the product are both greater than 0.98. The specific test results are as follows Figure 6 shown.

[0102] 3. Competitive product testing

[0103] Select similar products on the market. See Table 2 for details. Test stability of miscibility with water. The test appearance diagram of competitor 1 is as follows: Figure 7 , the test appearance diagram of competitor 2 is as follows Figure 8 .

[0104] Table 2

[0105]

Claims

1. A water-soluble turmeric, characterized in that The preparation raw materials include: emulsifier, solvent, curcumin; wherein the mass ratio of the emulsifier, solvent, curcumin is (5-10):(1-2):1; and the color value of water-soluble turmeric is not less than 100.

2. The water-soluble turmeric according to claim 1, characterized in that The color value of the curcumin is greater than 1000.

3. The water-soluble turmeric according to claim 1, characterized in that The emulsifier includes: one or more of Tween 20, Tween 60, Tween 80, monoglycerol fatty acid ester, diglycerol fatty acid ester, polyglycerol fatty acid ester, sucrose fatty acid ester, acetylated monoglycerol fatty acid ester, acetylated diglycerol fatty acid ester, α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin.

4. The water-soluble turmeric according to any one of claims 1 to 3, characterized in that The solvent includes one or more of glycerol, propylene glycol, sorbitol, mannitol, lactitol, isopropanol, n-butanol and anhydrous ethanol.

5. The water-soluble turmeric according to claim 4, characterized in that The solvent is anhydrous ethanol.

6. A high-speed emulsification preparation process of water-soluble turmeric according to any one of claims 1 to 5, characterized in that: include: S1. Add emulsifier and curcumin into an emulsification tank and stir to mix; S2, adding a solvent to obtain a curcumin solution; S3. Use a high-speed emulsifier to emulsify the curcumin solution at high speed, and the curcumin is completely embedded in the emulsifier to obtain water-soluble turmeric.

7. The high-speed emulsification preparation process of water-soluble turmeric according to claim 6, characterized in that: The stirring speed in the step S1 is 2000-5000 rpm.

8. The high-speed emulsification preparation process of water-soluble turmeric according to claim 7, characterized in that: The stirring time in the step S1 is 10-30 min.

9. The high-speed emulsification preparation process of water-soluble turmeric according to claim 6, characterized in that: The stirring temperature in the step S1 is 20-30°C.

10. The high-speed emulsification preparation process of water-soluble turmeric according to claim 6, characterized in that: In the step S3, the rotation speed of the high-speed emulsification is 5000-8000 rpm, and the time of the high-speed emulsification is 10-30 min.

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