CN118120829A - Rice oil diglyceride oil powder grease and preparation method and application thereof - Google Patents

Abstract

The invention provides rice oil diglyceride oil powder grease and a preparation method and application thereof, and relates to the technical field of grease products. The invention provides rice oil diglyceride oil powder grease which comprises the following components in percentage by mass: 40-60% of rice oil diglyceride oil, 35-56% of resistant dextrin, 3-5% of sodium caseinate and 1-3% of mono-diglyceride fatty acid ester. The rice oil diglyceride oil powder grease provided by the invention has good stability, and the DAG content is high (more than or equal to 16%), so that the application range of the rice oil diglyceride oil is widened.

Description

A kind of rice oil diglyceride oil powder fat and its preparation method and application

Technical Field

The invention relates to the technical field of oil products, and in particular to a rice oil diglyceride oil powder oil and a preparation method and application thereof.

Background technique

Rice oil is a common edible oil. Rice oil diglyceride oil is made from rice oil as raw material, lipase preparation, water, glycerol and other main auxiliary materials, through lipase catalysis, distillation separation, deodorization and other processes. Diacerol (DAG) is a structural lipid in which a fatty acid in triglyceride (TAG) is replaced by a hydroxyl group. It is a trace component of natural oils and is a food ingredient recognized as safe in the world.

Reducing the fat content in people's diet has become a major problem. The traditional solution is to reduce the fat content in food, that is, low-fat food. However, low-fat food does not taste as good as full-fat food, low-fat food cannot produce a sense of fullness, or hunger soon after eating, and some low-fat foods contain more carbohydrates and higher calories. Diaceryl can effectively solve the above problems. Diaceryl has the effects of reducing weight, reducing postprandial blood lipid levels, reducing the risk of cardiovascular disease, lowering blood sugar levels, and increasing bone density. In particular, rice oil diglyceride oil is rich in oryzanol, which makes rice oil diglyceride oil favored in the food industry.

However, since rice oil diglyceride oil is a liquid oil, it is not easily soluble in water and is not easy to be combined with other water-soluble food additives, thus limiting its application in food production.

Summary of the invention

In view of this, the object of the present invention is to provide a rice oil diglyceride oil powder oil and a preparation method and application thereof. The present invention develops rice oil diglyceride oil into a water-soluble powder oil, and the provided rice oil diglyceride oil powder oil has good stability and high diglyceride (DAG) content.

In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

The invention provides a rice oil diglyceride oil powdered fat, comprising the following components in percentage by mass: 40-60% of rice oil diglyceride oil, 35-56% of resistant dextrin, 3-5% of sodium caseinate and 1-3% of mono- and di-glycerol fatty acid esters.

Preferably, the following components are included in percentage by mass: 45-50% rice oil diglyceride oil, 45-50.5% resistant dextrin, 3-4% sodium caseinate and 1.5-2% mono- and di-glycerol fatty acid esters.

The present invention provides a method for preparing the rice oil diglyceride oil powdered fat described in the above technical solution, comprising the following steps:

The mono- and di-glycerol fatty acid esters and rice oil diglyceride oil are first mixed to obtain an oil phase;

The resistant dextrin, sodium caseinate and water are mixed for a second time to obtain an aqueous phase;

The oil phase and the water phase are mixed, and emulsified, homogenized and spray-dried in sequence to obtain the rice oil diglyceride oil powder.

Preferably, during the first mixing, the temperature of the rice oil diglyceride oil is 65-72°C.

Preferably, during the second mixing, the temperature of water is 65-72°C.

Preferably, the first mixing and the second mixing are both stirring mixing.

Preferably, the emulsification is carried out in a shearing machine, the emulsification is carried out in a shearing machine, the shearing frequency is 45-50 Hz, the rotation speed is 1400-1500 r/min, and the time is 30-35 min.

Preferably, the homogenization is carried out in a homogenizer, and the homogenization pressure is 18-20 MPa.

Preferably, the spray drying is carried out in a spray drying tower, the inlet air temperature of the spray drying is 150-160°C, and the temperature inside the tower is 90-95°C.

The present invention provides the use of the rice oil diglyceride oil powder oil described in the above technical solution or the rice oil diglyceride oil powder oil prepared by the preparation method described in the above technical solution in the preparation of low glycemic index food.

The present invention provides a rice oil diglyceride oil powdered oil. The present invention introduces a large amount of rice oil diglyceride oil and selects low GI (glycemic index) carrier resistant dextrin, which can well carry the rice oil diglyceride powdered oil, and helps to improve the stability of the product, and give the product the characteristics of low glycemic index. The present invention selects sodium caseinate and mono- and diglycerol fatty acid esters as emulsifiers, which are food-grade lipophilic emulsifiers, and can fully combine the rice oil diglyceride oil with the aqueous phase carrier after emulsification, and can better stabilize the rice oil diglyceride powdered oil. The present invention develops rice oil diglyceride oil into a water-soluble powdered oil, and the provided rice oil diglyceride oil powdered oil has good stability and a high diglyceride (DAG) content (≥16%), which broadens the application range of rice oil diglyceride oil.

The present invention provides a method for preparing the rice oil diglyceride oil powdered oil described in the above technical scheme. The present invention adopts microcapsule technology to encapsulate the rice oil diglyceride oil to form an O/W emulsified system. The obtained powdered oil has uniform particle size, good stability, no oil seepage from the surface, and good water solubility.

The present invention provides the use of the rice oil diglyceride oil powder oil described in the above technical solution or the rice oil diglyceride oil powder oil prepared by the preparation method described in the above technical solution in the preparation of low glycemic index foods (i.e. low GI foods). The rice oil diglyceride oil powder oil provided by the present invention has a low glycemic index and a high DAG content, can be used for the preparation of low GI foods, and is suitable for the design of dietary foods for diabetics.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a physical photograph of the emulsion obtained after shear emulsification in Comparative Example 1.

FIG. 2 is a physical photograph of the emulsion after shear emulsification in Example 1.

FIG. 3 is a physical photograph of the rice oil diglyceride oil powdered fat prepared in Examples 1 to 3.

FIG. 4 is a photograph of the rice oil diglyceride oil powder prepared in Examples 1 to 3 after being dissolved in water.

Detailed ways

The invention provides a rice oil diglyceride oil powdered fat, comprising the following components in percentage by mass: 40-60% of rice oil diglyceride oil, 35-56% of resistant dextrin, 3-5% of sodium caseinate and 1-3% of mono- and di-glycerol fatty acid esters.

Calculated by mass percentage, the rice oil diglyceride oil powdered fat provided by the present invention comprises 40-60% of rice oil diglyceride oil, preferably 45-50%.

In terms of mass percentage, the rice oil diglyceride oil powdered fat provided by the present invention includes 35-56% of resistant dextrin, preferably 45-50.5%. In the present invention, the resistant dextrin is a low GI (glycemic index) carrier. The present invention introduces a large amount of rice oil diglyceride oil and selects a low GI carrier resistant dextrin, which can carry the rice oil diglyceride powdered fat well and help improve the stability of the product. Compared with carriers such as sugar or starch sugar, it can give the product a low glycemic index.

Calculated by mass percentage, the rice oil diglyceride oil powder provided by the present invention comprises 3-5% sodium caseinate, preferably 3-4%.

In terms of mass percentage, the rice oil diglyceride oil powdered fat provided by the present invention includes 1-3% mono- and diglyceride fatty acid esters, preferably 1.5-2%. The present invention selects sodium caseinate and mono- and diglyceride fatty acid esters as emulsifiers, which are food-grade lipophilic emulsifiers, and can fully combine the rice oil diglyceride oil with the aqueous phase carrier after emulsification, so as to better stabilize the rice oil diglyceride powdered fat.

In the present invention, the rice oil diglyceride oil powder oil preferably also includes a flavoring agent 1‰. In the present invention, the flavoring agent is preferably a sweetener, a flavoring agent or a taste regulator. The flavoring agent can improve the taste of the rice oil diglyceride oil powder oil and improve the palatability of the product.

The rice oil diglyceride oil powder provided by the invention has good oil stability and high DAG content (≥16%), thus broadening the application scope of the rice oil diglyceride oil.

The present invention provides a method for preparing the rice oil diglyceride oil powdered fat described in the above technical solution, comprising the following steps:

The mono- and di-glycerol fatty acid esters and rice oil diglyceride oil are first mixed to obtain an oil phase;

The resistant dextrin, sodium caseinate and water are mixed for a second time to obtain an aqueous phase;

The oil phase and the water phase are mixed, and emulsified, homogenized and spray-dried in sequence to obtain the rice oil diglyceride oil powder.

In the present invention, unless otherwise specified, the raw materials involved are commercially available products well known in the art.

The present invention first mixes the mono- and di-glycerol fatty acid esters and rice oil diglyceride oil to obtain an oil phase. In the present invention, during the first mixing, the temperature of the rice oil diglyceride oil is preferably 65-72° C. The present invention preferably heats the rice oil diglyceride oil to 65-72° C. and adds the mono- and di-glycerol fatty acid esters thereto. In the present invention, the first mixing is preferably stirring mixing, and the stirring mixing is based on uniform mixing.

The present invention performs a second mixing of the resistant dextrin, sodium caseinate and water to obtain an aqueous phase. The present invention has no special requirements for the amount of water used, as long as it can dissolve the resistant dextrin and sodium caseinate. In an embodiment of the present invention, the amount of water used to prepare 1 ton of rice oil diglyceride oil powder oil is preferably 470~600kg. The present invention also preferably adds a flavoring agent to the aqueous phase. In the present invention, during the second mixing, the temperature of the water is preferably 65~72°C; the second mixing is preferably stirred and mixed. The present invention preferably dissolves the resistant dextrin in water at 65~72°C, and then adds sodium caseinate to the obtained resistant dextrin solution, stirring and mixing until the mixture is uniform.

After obtaining the oil phase and the water phase, the present invention mixes the oil phase and the water phase, and sequentially performs emulsification, homogenization and spray drying to obtain the rice oil diglyceride oil powder grease. In the present invention, the emulsification is preferably carried out in a shearing machine, the shearing frequency is preferably 45-50 Hz, more preferably 48 Hz, the rotation speed is preferably 1400-1500 r/min, more preferably 1450 r/min, and the time is preferably 30-35 min. In the present invention, the oil phase and the water phase are preferably injected into the shearing machine at the same time for emulsification. In the present invention, the homogenization is preferably carried out in a homogenizer, and the homogenization pressure is preferably 18-20 MPa; the spray drying is preferably carried out in a spray drying tower, the inlet air temperature of the spray drying is preferably 150-160°C, and the temperature in the tower is preferably 90-95°C. The present invention has no special requirements for the shearing machine, homogenizer and spray drying tower, and the corresponding equipment well known to those skilled in the art can be used. In the embodiment of the present invention, the spray drying tower preferably uses an upper exhaust dairy grade spray drying tower.

The present invention uses microcapsule technology to encapsulate rice oil diglyceride oil to form an O/W emulsified system. The obtained powdered oil has uniform particle size and good stability after spray drying, and will not seep out of the surface of the oil, and has good water solubility. The preparation method provided by the present invention is simple and efficient.

The invention upgrades rice oil diglyceride oil into powdered oil through improved formula and preparation method and simple formula design, thereby ensuring the physical and chemical properties and sensory properties of the powdered oil, providing a fuller and purer taste, and improving the application range and edible quality of rice oil diglyceride oil.

The present invention provides the use of the rice oil diglyceride oil powder oil described in the above technical solution or the rice oil diglyceride oil powder oil prepared by the preparation method described in the above technical solution in the preparation of low glycemic index foods. The rice oil diglyceride oil powder oil provided by the present invention has a low glycemic index and a high DAG content, can be used to prepare low glycemic index foods, and is suitable for the design of dietary foods for diabetics.

To further illustrate the present invention, the rice oil diglyceride oil powder and its preparation method and application provided by the present invention are described in detail below in conjunction with examples, but they should not be construed as limiting the scope of protection of the present invention.

In each embodiment, rice oil diglyceride oil was purchased from Yihai Kerry, and the DAG mass content was ≥40%.

Example 1

The preparation method of rice oil diglyceride oil powder grease is as follows:

(1) 450 kg of rice oil diglyceride was heated to 72° C., 15 kg of mono- and di-glycerol fatty acid esters were added, and the mixture was stirred and mixed to obtain an oil phase solution;

(2) Dissolve 505 kg of resistant dextrin in 600 kg of water at 72°C, add 30 kg of sodium caseinate, stir and mix evenly to obtain an aqueous phase solution;

(3) The oil phase solution prepared in step (1) and the water phase solution prepared in step (2) are simultaneously injected into a shearing machine for shear emulsification (shearing frequency 48 Hz, rotation speed 1450 r/min, time 30 min), the emulsified slurry is injected into a homogenizer for homogenization (homogenization pressure 18 MPa), and the homogenized slurry is injected into a spray drying tower for spray drying (inlet air temperature 150°C, tower temperature 90°C) to obtain a powder, namely, rice oil diglyceride oil powder fat.

Examples 2-3 and Comparative Example 1

The amounts of the raw materials of rice oil diglyceride oil, sodium caseinate, mono- and diglycerol fatty acid esters and resistant dextrin in the rice oil diglyceride oil powder oil in Examples 2 to 3 and Comparative Example 1 are shown in Table 1, and the rest are the same as in Example 1.

Table 1 Amounts of raw materials of powdered fats in Examples 1 to 3 and Comparative Example 1 (unit: kg).

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Figure 1 is a photo of the emulsion obtained after shear emulsification of Comparative Example 1. As can be seen from Figure 1, the comparative example does not use sodium caseinate and mono- and di-glycerol fatty acid esters, and cannot emulsify to achieve a combination of water phase and oil phase, and the oil phase floats on the upper layer.

Figure 2 is a photo of the emulsion after shear emulsification in Example 1. As can be seen from Figure 2, the liquid in Example 1 can be completely emulsified and fused. The emulsions after shear emulsification in Examples 2-3 are similar to those in Figure 2, and are all completely emulsified and fused.

Figure 3 is a photo of the rice oil diglyceride oil powdered fat prepared in Examples 1 to 3. As can be seen from Figure 3, the rice oil diglyceride oil powdered fat prepared in Examples 1 to 3 is in a white powdery state and has no agglomeration phenomenon during normal storage.

The rice oil diglyceride oil powder fat prepared in Examples 1 to 3 was dissolved in 80°C water (the mass ratio of rice oil diglyceride oil powder fat to water was 1:10). FIG4 is a photo of the rice oil diglyceride oil powder fat prepared in Examples 1 to 3 after being dissolved in water. The rice oil diglyceride oil powder fat prepared in Examples 1 to 3 is easily soluble in warm water above 50°C, and after dissolution, it is a milky white emulsion without obvious impurities.

The DAG content of the rice oil diglyceride oil powdered fat prepared in Example 1 is ≥18%, the DAG content of the rice oil diglyceride oil powdered fat prepared in Example 2 is ≥20%, and the DAG content of the rice oil diglyceride oil powdered fat prepared in Example 3 is ≥24%.

The sensory and physicochemical indicators of the rice oil diglyceride oil powder prepared in Examples 1 to 3 are shown in Table 2.

Table 2 Sensory and physicochemical indicators of rice oil diglyceride oil powder prepared in Examples 1 to 3

Note: The industry standard QB/T 4791 for non-dairy creamer requires: peroxide value ≤ 0.25g/100g; surface grease ≤ 5g/100g.

It can be seen from Table 2 that the rice oil diglyceride oil powder oil prepared in Examples 1 to 3 has a lower peroxide value and surface oil, indicating that the rice oil diglyceride oil is well encapsulated, so that the prepared rice oil diglyceride oil powder oil has good stability.

It can be seen from the above embodiments that the present invention successfully develops rice oil diglyceride oil into a water-soluble powdered oil. The rice oil diglyceride oil powdered oil has a low glycemic index and a high DAG oil content (>16%), which can achieve rapid energy supply to the human body and can be made into a low-GI food for rapid energy supply required by diabetic patients.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (10)

1. A rice oil diglyceride oil powdered fat, characterized in that it comprises the following components in percentage by mass: 40-60% of rice oil diglyceride oil, 35-56% of resistant dextrin, 3-5% of sodium caseinate and 1-3% of mono- and di-glycerol fatty acid esters. 2. The rice oil diglyceride oil powdered fat according to claim 1 is characterized in that it comprises the following components in percentage by mass: rice oil diglyceride oil 45-50%, resistant dextrin 45-50.5%, sodium caseinate 3-4% and mono- and di-glycerol fatty acid esters 1.5-2%. 3. The method for preparing the rice oil diglyceride oil powder grease according to claim 1 or 2, characterized in that it comprises the following steps: The mono- and di-glycerol fatty acid esters and rice oil diglyceride oil are first mixed to obtain an oil phase; The resistant dextrin, sodium caseinate and water are mixed for a second time to obtain an aqueous phase; The oil phase and the water phase are mixed, and emulsified, homogenized and spray-dried in sequence to obtain the rice oil diglyceride oil powder. 4. The preparation method according to claim 3, characterized in that during the first mixing, the temperature of the rice oil diglyceride oil is 65-72°C. 5. The preparation method according to claim 3, characterized in that during the second mixing, the temperature of water is 65-72°C. 6. The preparation method according to any one of claims 3 to 5, characterized in that both the first mixing and the second mixing are stirring mixing. 7. The preparation method according to claim 3, characterized in that the emulsification is carried out in a shearing machine with a shearing frequency of 45-50 Hz, a rotation speed of 1400-1500 r/min, and a time of 30-35 min. 8. The preparation method according to claim 3, characterized in that the homogenization is carried out in a homogenizer and the homogenization pressure is 18-20 MPa. 9. The preparation method according to claim 3, characterized in that the spray drying is carried out in a spray drying tower, the inlet air temperature of the spray drying is 150-160°C, and the temperature in the tower is 90-95°C. 10. Use of the rice oil diglyceride oil powdered fat according to claim 1 or 2 or the rice oil diglyceride oil powdered fat prepared by the preparation method according to any one of claims 3 to 9 in preparing low glycemic index foods.