A carotenoid microcapsule, and a preparation method and application thereof

Abstract

The present application relates to the technical field of microcapsule preparation, and particularly relates to a carotenoid microcapsule, a preparation method and application thereof.The carotenoid microcapsule comprises a core material and a wall material; the core material comprises carotenoids, and the wall material comprises oligoisomaltose and erythritol with a mass ratio of 1:3-3:1.The carotenoid microcapsule has high stability to light, heat and oxygen, can still guarantee a high carotenoid content retention rate after long-time storage, is not easy to absorb moisture, and can better guarantee product performance.The carotenoid microcapsule also has the advantages of simple preparation process, green environmental protection, low production cost and the like, can be applied to large-scale preparation, and has a good application prospect.

Description

Technical Field

[0001] This invention relates to the field of microcapsule formulation technology, and in particular to a carotenoid microcapsule, its preparation method, and its application. Background Technology

[0002] Carotenoids are a class of yellow, orange-red, or red polyenes, generally composed of eight isoprene units, and are divided into aerobic and aerobic carotenoids. As is well known, carotenoids have beneficial effects on health; for example, they are provitamin A, can prevent night blindness, have antioxidant properties, anti-cancer effects, and strong coloring power. Furthermore, carotenoids are physiological antioxidants that can inhibit lipid peroxidation. However, carotenoids are insoluble in water, have very low solubility in fats and oils, and are unstable to light, oxygen, and heat, which greatly limits their applications.

[0003] Microencapsulation technology can effectively reduce the impact of external environmental factors (such as light, heat, and oxygen) on active substances, improving the stability of carotenoids and thus increasing their application in functional products. Currently available carotenoid microcapsule formulations generally include sucrose, maltose, maltodextrin, and glucose syrup. While the addition of these sugars improves the stability and water solubility of the microcapsule formulation, it is not beneficial for general health or for those needing to control their blood sugar levels. Therefore, there is a need to develop a novel carotenoid microcapsule formulation with higher stability. Summary of the Invention

[0004] This invention provides a carotenoid microcapsule, its preparation method, and its application.

[0005] This invention aims to develop a novel, highly stable carotenoid microcapsule formulation. During the research and development process, it was discovered that sugars such as sucrose, maltose, maltodextrin, and glucose syrup play a crucial role in the stability of carotenoid microcapsule formulations. Simply removing these sugars or replacing them with commonly used microcapsule wall materials such as colloids leads to a significant decrease in the stability of the carotenoid microcapsule formulation. Furthermore, while some substitute components can maintain stability relatively well, their encapsulation rate of carotenoids is low. Through continuous experimentation, this invention found that adding a specific ratio of isomaltooligosaccharide and erythritol to the wall material can significantly improve the stability of carotenoid microcapsules. Surprisingly, the product using the above wall material exhibits better stability than products conventionally containing sucrose, maltose, maltodextrin, and glucose syrup, and is less hygroscopic, thus better preserving product performance.

[0006] Specifically, the present invention provides the following technical solutions:

[0007] The present invention provides a carotenoid microcapsule, the carotenoid microcapsule comprising a core material and a wall material; wherein, the core material comprises carotenoids, and the wall material comprises isomaltooligosaccharide and erythritol in a mass ratio of 1:3 to 3:1.

[0008] The present invention unexpectedly discovered that adding isomaltooligosaccharide and erythritol in the above-mentioned proportions to the wall material significantly improves the stability of carotenoid microcapsule formulations compared to adding sucrose, maltose, maltodextrin, glucose syrup, or a combination of at least two of these components. Moreover, the combination of isomaltooligosaccharide and erythritol significantly enhances the stability of carotenoids by encapsulating them, compared to using isomaltooligosaccharide or erythritol alone. In other words, the two components have a synergistic effect, jointly improving the stability of carotenoid microcapsule formulations.

[0009] In this invention, the wall material is an aqueous wall material, which can encapsulate carotenoids and reduce the adverse effects of external environmental factors such as light, oxygen, and heat on the stability of carotenoids.

[0010] The wall materials described above also include colloids and / or modified starch.

[0011] Preferably, the colloid is gum arabic, and / or the modified starch is sodium octenyl succinate starch.

[0012] Preferably, the wall material comprises isomaltooligosaccharide and erythritol in a mass ratio of 1:3 to 3:1, as well as modified starch.

[0013] Preferably, in the wall material, the total mass ratio of modified starch to isomaltooligosaccharide and erythritol is 1:1.5-3.

[0014] More preferably, in the wall material, the total mass ratio of modified starch to isomaltooligosaccharide and erythritol is 1:1.5-2.

[0015] To better ensure the oxidative stability of carotenoids and prevent their oxidative degradation, the wall material also contains antioxidants.

[0016] Preferably, the antioxidant comprises ascorbic acid and vitamin E in a mass ratio of (2-4):1. For carotenoids, ascorbic acid and vitamin E in this ratio range can work synergistically and exert a better antioxidant effect in the wall material with the above-mentioned specific composition, significantly reducing the oxidative degradation of carotenoids.

[0017] In the microcapsules described above, the mass ratio of the core material to the wall material is (4-8):1.

[0018] Preferably, the mass ratio of the antioxidant to the core material is 1:(3-6).

[0019] In some embodiments of the present invention, the raw materials of the carotenoid microcapsules contain the following components in parts by weight: 50-80 parts of carotenoids, 60-200 parts of isomaltooligosaccharide, 60-200 parts of erythritol, 140-170 parts of sodium octenyl succinate starch, 8-12 parts of ascorbic acid, 3-7 parts of vitamin E, and 200-250 parts of water.

[0020] In some embodiments of the present invention, the raw materials of the carotenoid microcapsules contain the following components in parts by weight: 55-75 parts of carotenoids, 65-195 parts of isomaltooligosaccharide, 65-195 parts of erythritol, 150-160 parts of sodium starch octenyl succinate, 8-12 parts of ascorbic acid, 3-7 parts of vitamin E, and 200-250 parts of water.

[0021] The aforementioned carotenoid microcapsules maintain high stability during long-term storage, effectively reducing the loss of carotenoid content and exhibiting a high encapsulation rate.

[0022] In this invention, the carotenoids include one or more of lycopene, lutein, zeaxanthin, carotene, capsanthin, and astaxanthin.

[0023] Preferably, the carotenoid is one or more selected from lycopene, lutein, and zeaxanthin.

[0024] Accelerated stability tests have verified that the microcapsule wall material composition of this invention can better ensure the stability of lycopene, lutein, and zeaxanthin, making them less prone to moisture absorption, while achieving a high encapsulation rate.

[0025] The present invention provides a method for preparing the above-mentioned carotenoid microcapsules, the method comprising: dissolving the wall material in water to obtain an aqueous phase, mixing the aqueous phase with carotenoids, emulsifying the mixture to obtain a carotenoid emulsion, and grinding the carotenoid emulsion to obtain a carotenoid microemulsion.

[0026] Preferably, the emulsification is performed at 55-65°C with shearing and stirring at 7000-9000 r / min;

[0027] Preferably, the grinding is performed to a particle size of 100-600 nm.

[0028] The grinding can be carried out using a nano-grinding machine, grinding to the above-mentioned particle size. For example, grinding at a speed of 1600-2500 r / min for 1.0-2.0 h.

[0029] Preferably, during the mixing and dissolution of the components of the wall material, thorough stirring can be carried out at 55-65℃ (e.g., stirring at a speed of 30-50 r / min for 30-60 min) to ensure that the components are fully mixed and a uniform aqueous phase is obtained.

[0030] The method described above further includes: spray drying the carotenoid microemulsion.

[0031] Preferably, the inlet air temperature of the spray dryer is 165-180℃, the outlet air temperature is 85-105℃, and the air volume is 300-500mL / h.

[0032] In some embodiments of the present invention, the method for preparing the microcapsules includes the following steps:

[0033] (1) Mix sodium octenyl succinate starch, erythritol, isomaltooligosaccharide, ascorbic acid and vitamin E with water and stir to obtain an aqueous phase;

[0034] (2) Carotenoid crystals were added to the aqueous phase while stirring, and an emulsion was obtained by shearing.

[0035] (3) The above emulsion is ground to a particle size of 100-600 nm to obtain a microemulsion (nanoemulsion);

[0036] (4) The microemulsion is spray-dried to obtain the carotenoid microcapsule formulation.

[0037] The present invention also provides the application of the above-described carotenoid microcapsules in the preparation of food, medicine or feed.

[0038] The beneficial effects of this invention include at least the following: the carotenoid microcapsules provided by this invention exhibit high stability against light, heat, and oxygen, maintaining a high carotenoid content retention rate even after long-term storage (after 6 months of accelerated testing at 40°C and 75% RH, the carotenoid content retention rate can reach over 95%), and they are not easily hygroscopic, thus better ensuring product performance. These carotenoid microcapsules also possess advantages such as simple preparation process, environmental friendliness, and low production cost, making them suitable for large-scale preparation and showing promising application prospects. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] Example 1

[0041] This embodiment provides a lycopene microcapsule, the raw materials of which include the following components: 65g of lycopene crystals (content is 90wt%), 160g of sodium octenyl succinate starch, 130g of erythritol, 130g of isomaltooligosaccharide, 10g of ascorbic acid, 5g of vitamin E, and 225g of water.

[0042] This embodiment also provides a method for preparing the above-mentioned lycopene microcapsules, the specific steps of which are as follows:

[0043] (1) Add sodium octenyl succinate starch, erythritol, isomaltooligosaccharide, ascorbic acid and vitamin E to purified water, and stir at 40 r / min for 45 min at 65°C to obtain an aqueous phase;

[0044] (2) Lycopene crystals were added to the aqueous phase while stirring, and lycopene emulsion was obtained by shearing. The shearing speed was 9000 r / min, the time was 10 min, and the emulsion temperature was 65℃ during shearing.

[0045] (3) The lycopene emulsion was ground using a nano-grinding machine at a speed of 1700 r / min for 1.5 h to obtain a lycopene microemulsion with a particle size of 0.3 μm.

[0046] (4) The lycopene microemulsion is spray-dried at an inlet air temperature of 175°C, an outlet air temperature of 100°C, and a flow rate of 500 mL / h to obtain a lycopene microcapsule formulation.

[0047] Example 2

[0048] This embodiment provides a lycopene microcapsule, the raw materials of which include the following components: 65g of lycopene crystals (content is 90wt%), 160g of sodium octenyl succinate starch, 65g of erythritol, 195g of isomaltooligosaccharide, 10g of ascorbic acid, 5g of vitamin E, and 225g of water.

[0049] This embodiment also provides a method for preparing the above-mentioned lycopene microcapsules, the specific steps of which are as follows:

[0050] (1) Add sodium octenyl succinate starch, erythritol, isomaltooligosaccharide, ascorbic acid and vitamin E to purified water, and stir at 40 r / min for 45 min at 65°C to obtain an aqueous phase;

[0051] (2) Lycopene crystals were added to the aqueous phase while stirring, and lycopene emulsion was obtained by shearing. The shearing speed was 9000 r / min, the time was 10 min, and the emulsion temperature was 65℃ during shearing.

[0052] (3) The lycopene emulsion was ground using a nano-grinding machine at a speed of 1700 r / min for 1.5 h to obtain a lycopene microemulsion with a particle size of 0.3 μm.

[0053] (4) The lycopene microemulsion is spray-dried at an inlet air temperature of 175°C, an outlet air temperature of 100°C, and a flow rate of 500 mL / h to obtain a lycopene microcapsule formulation.

[0054] Example 3

[0055] This embodiment provides a lycopene microcapsule, the raw materials of which include the following components: 65g of lycopene crystals (content is 90wt%), 160g of sodium octenyl succinate starch, 195g of erythritol, 65g of isomaltooligosaccharide, 12g of ascorbic acid, 3g of vitamin E, and 225g of water.

[0056] This embodiment also provides a method for preparing the above-mentioned lycopene microcapsules, the specific steps of which are as follows:

[0057] (1) Add sodium octenyl succinate starch, erythritol, isomaltooligosaccharide, ascorbic acid and vitamin E to purified water, and stir at 40 r / min for 45 min at 65°C to obtain an aqueous phase;

[0058] (2) Lycopene crystals were added to the aqueous phase while stirring, and lycopene emulsion was obtained by shearing. The shearing speed was 9000 r / min, the time was 10 min, and the emulsion temperature was 65℃ during shearing.

[0059] (3) The lycopene emulsion was ground using a nano-grinding machine at a speed of 1700 r / min for 1.5 h to obtain a lycopene microemulsion with a particle size of 0.3 μm.

[0060] (4) The lycopene microemulsion is spray-dried at an inlet air temperature of 175°C, an outlet air temperature of 100°C, and a flow rate of 500 mL / h to obtain a lycopene microcapsule formulation.

[0061] Example 4

[0062] This embodiment provides a lutein microcapsule, the raw materials of which include the following components: 75g of lutein crystals (content is 80wt%), 150g of sodium octenyl succinate starch, 130g of erythritol, 130g of isomaltooligosaccharide, 10g of ascorbic acid, 5g of vitamin E, and 225g of water.

[0063] This embodiment also provides a method for preparing the above-mentioned lutein microcapsules, the specific steps of which are as follows:

[0064] (1) Add sodium octenyl succinate starch, erythritol, isomaltooligosaccharide, ascorbic acid and vitamin E to purified water, and stir at 40 r / min for 45 min at 65°C to obtain an aqueous phase;

[0065] (2) Lutein crystals were added to the aqueous phase while stirring, and an emulsion was obtained by shearing. The shearing speed was 9000 r / min, the time was 10 min, and the emulsion temperature was 65℃ during shearing.

[0066] (3) The emulsion was ground by a nano milling machine at a speed of 1700 r / min for 1.5 h to obtain a nano emulsion with a particle size of 0.3 μm;

[0067] (4) The nanoemulsion is spray-dried at an inlet air temperature of 175°C, an outlet air temperature of 100°C, and a flow rate of 500 mL / h to obtain a lutein microcapsule formulation.

[0068] Example 5

[0069] This embodiment provides a zeaxanthin microcapsule, the raw materials of which include the following components: 75g of zeaxanthin crystals (content is 80wt%), 150g of sodium octenyl succinate starch, 130g of erythritol, 130g of isomaltooligosaccharide, 10g of ascorbic acid, 5g of vitamin E, and 225g of water.

[0070] This embodiment also provides a method for preparing the above-mentioned zeaxanthin microcapsules, the specific steps of which are as follows:

[0071] (1) Add sodium octenyl succinate starch, erythritol, isomaltooligosaccharide, ascorbic acid and vitamin E to purified water, and stir at 40 r / min for 45 min at 65°C to obtain an aqueous phase;

[0072] (2) Add zeaxanthin crystals to the aqueous phase while stirring, and shear to obtain an emulsion. The shearing speed is 9000 r / min, the time is 10 min, and the emulsion temperature during shearing is 65℃.

[0073] (3) The emulsion was ground by a nano milling machine at a speed of 1700 r / min for 1.5 h to obtain a nano emulsion with a particle size of 0.3 μm;

[0074] (4) The nanoemulsion is spray-dried at an inlet air temperature of 175°C, an outlet air temperature of 100°C, and a flow rate of 500 mL / h to obtain a zeaxanthin microcapsule formulation.

[0075] Comparative Example 1

[0076] This comparative example provides a lycopene microcapsule, which differs from the lycopene microcapsule of Example 1 only in that: erythritol in the raw materials is removed and the amount of isomaltooligosaccharide is adjusted to 260g.

[0077] The preparation method of the above-mentioned lycopene microcapsules is the same as that in Example 1.

[0078] Comparative Example 2

[0079] This comparative example provides a lycopene microcapsule, which differs from the lycopene microcapsule of Example 1 only in that: isomaltooligosaccharide in the raw materials is removed, and the amount of erythritol is adjusted to 260g.

[0080] The preparation method of the above-mentioned lycopene microcapsules is the same as that in Example 1.

[0081] Comparative Example 3

[0082] This comparative example provides a lycopene microcapsule, which differs from the lycopene microcapsule of Example 1 only in that 130g of erythritol and 130g of isomaltooligosaccharide are replaced with 130g of glucose syrup and 130g of sucrose (refer to CN109069433A).

[0083] The preparation method of the above-mentioned lycopene microcapsules is the same as that in Example 1.

[0084] Comparative Example 4

[0085] This comparative example provides a lycopene microcapsule, which differs from the lycopene microcapsule of Example 1 only in that the total amount of isomaltooligosaccharide and erythritol remains unchanged, and the mass ratio of isomaltooligosaccharide and erythritol is adjusted to 1:4 (i.e., 52g of isomaltooligosaccharide and 208g of erythritol).

[0086] The preparation method of the above-mentioned lycopene microcapsules is the same as that in Example 1.

[0087] Comparative Example 5

[0088] This comparative example provides a lycopene microcapsule, which differs from the lycopene microcapsule of Example 1 in that erythritol is replaced with sorbitol.

[0089] The preparation method of the above-mentioned lycopene microcapsules is the same as that in Example 1.

[0090] Comparative Example 6

[0091] This comparative example provides a lutein microcapsule, which differs from the lutein microcapsule of Example 4 only in that: erythritol is removed from the raw materials and the amount of isomaltooligosaccharide is adjusted to 260g.

[0092] The preparation method of the above lutein microcapsules is the same as that in Example 4.

[0093] Comparative Example 7

[0094] This comparative example provides a lutein microcapsule, which differs from the lutein microcapsule of Example 4 only in that: isomaltooligosaccharide in the raw materials is removed, and the amount of erythritol is adjusted to 260g.

[0095] The preparation method of the above lutein microcapsules is the same as that in Example 4.

[0096] Comparative Example 8

[0097] This comparative example provides a lutein microcapsule, which differs from the lutein microcapsule of Example 4 only in that 130g of erythritol and 130g of isomaltooligosaccharide are replaced with 130g of glucose syrup and 130g of sucrose (refer to CN109069433A).

[0098] The preparation method of the above lutein microcapsules is the same as that in Example 4.

[0099] Comparative Example 9

[0100] This comparative example provides a zeaxanthin microcapsule, which differs from the zeaxanthin microcapsule of Example 5 only in that: erythritol is removed from the raw materials and the amount of isomaltooligosaccharide is adjusted to 260g.

[0101] The preparation method of the above-mentioned zeaxanthin microcapsules is the same as that in Example 5.

[0102] Comparative Example 10

[0103] This comparative example provides a zeaxanthin microcapsule, which differs from the zeaxanthin microcapsule of Example 5 only in that: isomaltooligosaccharide in the raw materials is removed, and the amount of erythritol is adjusted to 260g.

[0104] The preparation method of the above-mentioned zeaxanthin microcapsules is the same as that in Example 5.

[0105] Comparative Example 11

[0106] This comparative example provides a zeaxanthin microcapsule, which differs from the zeaxanthin microcapsule of Example 5 only in that 130g of erythritol and 130g of isomaltooligosaccharide are replaced with 130g of glucose syrup and 130g of sucrose (refer to CN109069433A).

[0107] The preparation method of the above-mentioned zeaxanthin microcapsules is the same as that in Example 5.

[0108] Experimental Example 1: Stability Testing of Lycopene Microcapsule Formulation

[0109] The lycopene microcapsule formulations provided in the examples and comparative examples were placed under accelerated testing conditions of 40°C and 75% RH for 6 months, and the lycopene content was tested.

[0110] The hygroscopicity of the lycopene microcapsule formulations provided in the examples and comparative examples was evaluated as follows: 0.50 g of the dried microcapsule sample (dried to constant weight) was accurately weighed and placed in a 50 mL beaker. The total mass of the beaker and sample was measured as M0. The beaker was then placed in a 250 mL beaker to create a stable environment. The large beaker contained 30 mL of saturated sodium carbonate solution (with a constant relative humidity RH = 43%), and then sealed and placed in a vacuum drying oven at 25°C. After 12 hours, the mass of the beaker and sample, M1, was measured, and the hygroscopicity of the sample was calculated using the following formula:

[0111] Hygroscopicity = (M1-M0) / M0×100%.

[0112] The results are shown in Table 1.

[0113] Table 1. Changes in lycopene content and evaluation of hygroscopicity.

[0114] Group Start 1 month 3 months 6 months hygroscopic Hygroscopicity evaluation Example 1 10.94％ 10.92％ 10.84％ 10.75％ 2.5％ Non-hygroscopic Example 2 11.54％ 11.50％ 11.46％ 11.40％ 2.6％ Non-hygroscopic Example 3 11.50％ 11.44％ 11.39％ 11.28％ 2.3％ Non-hygroscopic Comparative Example 1 10.68％ 10.47％ 10.37％ 10.12％ 11.5％ Moisture absorption Comparative Example 2 10.82％ 10.25％ 9.32％ 8.12％ 1.6％ Non-hygroscopic Comparative Example 3 10.90％ 10.10％ 9.10％ 8.18％ 28.1％ Moisture-absorbing Comparative Example 4 10.72％ 10.52％ 10.36％ 10.05％ 2.2％ Non-hygroscopic Comparative Example 5 10.85％ 10.30％ 9.36％ 8.50％ 19.8％ Moisture-absorbing

[0115] As shown in Table 1, the lycopene microcapsules of each embodiment have high stability. Under accelerated testing conditions of 40°C and 75% RH, the lycopene content retention rate after 6 months of storage is significantly higher than that of the comparative embodiments. Moreover, the lycopene microcapsules of each embodiment are less prone to moisture absorption.

[0116] Experiment Example 2: Stability Testing of Lutein Microcapsule Formulation

[0117] The lutein microcapsule formulations provided in the examples and comparative examples were placed under accelerated testing conditions of 40°C and 75% RH for 6 months, and the lutein content was tested.

[0118] The hygroscopicity of the lutein microcapsule formulations provided in the examples and comparative examples was evaluated using the same method as in Experimental Example 1.

[0119] The results are shown in Table 2.

[0120] Table 2. Results of lutein content detection and hygroscopicity evaluation

[0121] Group Start 1 month 3 months 6 months hygroscopic Hygroscopicity evaluation Example 4 11.13％ 11.08％ 11.02％ 10.94％ 2.4％ Non-hygroscopic Comparative Example 6 10.87％ 10.67％ 10.57％ 10.30％ 11.2％ Moisture absorption Comparative Example 7 10.80％ 10.21％ 9.28％ 8.38％ 1.5％ Non-hygroscopic Comparative Example 8 10.42％ 9.74％ 8.92％ 8.36％ 29.3％ Moisture-absorbing

[0122] As shown in Table 2, the lutein microcapsules of the embodiments have high stability. Under accelerated test conditions of 40°C and 75%RH, the lutein content retention rate after 6 months of storage is significantly higher than that of the comparative embodiments. Moreover, the lutein microcapsules of the embodiments are less prone to moisture absorption.

[0123] Experimental Example 3: Stability Testing of Zeaxanthin Microcapsule Formulation

[0124] The zeaxanthin microcapsule formulations provided in the examples and comparative examples were placed under accelerated testing conditions of 40°C and 75% RH for 6 months, and the zeaxanthin content was detected.

[0125] The hygroscopicity of the zeaxanthin microcapsule formulations provided in the examples and comparative examples was evaluated using the same method as in Experimental Example 1.

[0126] The results are shown in Table 3.

[0127] Table 3. Results of zeaxanthin content detection and hygroscopicity evaluation in zeaxanthin.

[0128] Group Start 1 month 3 months 6 months hygroscopic Hygroscopicity evaluation Example 5 10.92％ 10.87％ 10.83％ 10.73％ 2.5％ Non-hygroscopic Comparative Example 9 10.75％ 10.52％ 10.45％ 10.19％ 11.1％ Moisture absorption Comparative Example 10 10.69％ 9.96％ 9.00％ 8.60％ 1.8％ Non-hygroscopic Comparative Example 11 10.45％ 9.63％ 8.76％ 8.26％ 28.5％ Moisture-absorbing

[0129] As shown in Table 3, the zeaxanthin microcapsule formulation of the examples has good stability. Under accelerated test conditions of 40°C and 75% RH, the zeaxanthin content retention rate after 6 months of storage is significantly higher than that of the comparative examples. Moreover, the zeaxanthin microcapsules of the examples are less prone to moisture absorption.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions 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 invention.

Claims

1. A carotenoid microcapsule, characterized in that, The raw materials of the carotenoid microcapsules contain the following components in parts by weight: 50-80 parts of carotenoids, 60-200 parts of isomaltooligosaccharide, 60-200 parts of erythritol, 140-170 parts of sodium starch octenyl succinate, 8-12 parts of ascorbic acid, 3-7 parts of vitamin E, and 200-250 parts of water. The carotenoid microcapsules comprise a core material and a wall material; wherein the core material comprises carotenoids, and the wall material comprises isomaltooligosaccharide and erythritol, as well as sodium octenyl succinate starch, ascorbic acid and vitamin E; In the wall material, the mass ratio of isomaltooligosaccharide to erythritol is 1:3-3:1, and the total mass ratio of isomaltooligosaccharide and erythritol to sodium octenyl succinate starch is 1.5-3:

1. The mass ratio of the core material to the wall material is (4-8):

1.

2. The carotenoid microcapsules according to claim 1, characterized in that, The mass ratio of ascorbic acid to vitamin E in the wall material is (2-4):

1.

3. The carotenoid microcapsules according to claim 1 or 2, characterized in that, The total mass ratio of the ascorbic acid and vitamin E to the mass ratio of the core material is 1:(3-6).

4. The carotenoid microcapsules according to claim 1 or 2, characterized in that, The raw materials of the carotenoid microcapsules contain the following components in parts by weight: 55-75 parts carotenoids, 65-195 parts isomaltooligosaccharide, 65-195 parts erythritol, 150-160 parts sodium octenyl succinate starch, 8-12 parts ascorbic acid, 3-7 parts vitamin E, and 200-250 parts water.

5. The carotenoid microcapsules according to claim 1 or 2, characterized in that, The carotenoids are selected from one or more of lycopene, lutein, and zeaxanthin.

6. The carotenoid microcapsules according to claim 3, characterized in that, The carotenoids are selected from one or more of lycopene, lutein, and zeaxanthin.

7. The carotenoid microcapsules according to claim 4, characterized in that, The carotenoids are selected from one or more of lycopene, lutein, and zeaxanthin.

8. The method for preparing carotenoid microcapsules according to any one of claims 1 to 7, characterized in that, The method includes: dissolving the wall material in water to obtain an aqueous phase, mixing the aqueous phase with carotenoids, emulsifying the mixture to obtain a carotenoid emulsion, and grinding the carotenoid emulsion to obtain a carotenoid microemulsion.

9. The method according to claim 8, characterized in that, The emulsification is performed at 55-65°C with shearing and stirring at 7000-9000 r / min; And / or, the grinding is performed to a particle size of 100-600 nm.

10. The method according to claim 8 or 9, characterized in that, The method further includes: spray drying the carotenoid microemulsion.

11. The method according to claim 10, characterized in that, The spray dryer has an inlet air temperature of 165-180℃, an outlet air temperature of 85-105℃, and an air volume of 300-500mL / h.

12. The use of the carotenoid microcapsules according to any one of claims 1 to 7 in the preparation of food, medicine or feed.