Low-carbon water vegetarian medium-chain triglyceride microcapsule powder and preparation method thereof

Abstract

The invention discloses low-carbon water vegetarian medium-chain triglyceride micro-capsule powder and a preparation method thereof, and belongs to the field of functional grease processing technology and functional food application. The low-carbon water vegetarian medium-chain triglyceride microcapsule powder comprises the following components in percentage by mass: 1-80% of carbohydrate containing dietary fibers, 0-80% of vegetable protein, 10-80% of medium-chain triglyceride and 0-5% of an emulsifier, the prepared low-carbon water vegetarian medium-chain triglyceride micro-capsule powder has the advantages that the content of available carbohydrates is not higher than 5g / 100g, low carbohydrates can be claimed according to GB-28050, and meanwhile, the prepared low-carbon water vegetarian medium-chain triglyceride micro-capsule powder is good in stability and low in surface oil, can be used as a functional food raw material to be processed into various foods, and can be applied to various foods. The food is used for vegetarian people, low-carbon diet people, hyperglycemia people, senile people with slow gastrointestinal motility and digestion, ketogenic diet people, weight-losing and weight-managing people and the like.

Description

Technical Field

[0001] The present invention relates to functional oil processing technology and the application field of functional food, and specifically relates to a low-carb vegetarian medium-chain triglyceride microcapsule powder and a preparation method thereof. Background Art

[0002] Microencapsulation technology, which encapsulates trace amounts of substances in polymer films, is a micro-packaging technology for storing solids, liquids, and gases. In the food industry, microencapsulation technology often uses functional edible oils as the core material, proteins, modified starches, or colloids as the wall material, and small molecules such as syrups and dextrins as fillers. After the water and oil phases are mixed, the microcapsules are produced through a series of processes including shearing, emulsification, homogenization, sterilization, and spray drying.

[0003] The lipid microcapsule powder prepared by microencapsulation technology has the following advantages: (1) The oil is transformed from liquid to powdery solid, which is convenient for storage and transportation; (2) The oil is wrapped with one or more layers of wall material, which can block oxygen, air, light, and moisture, improve the oxidative stability of the oil, and facilitate the storage of the oil; (3) Masking of taste. Some functional oils such as fish oil, DHA algae oil, linseed oil, safflower seed oil, conjugated linoleic acid glycerides, etc. have unpleasant odors or tastes, which can be masked by microencapsulation technology; (4) The oil is transformed from a liquid or solid water-insoluble substance into a solid water-soluble powder, which directly broadens the scope of use of functional oils in food, medicine, cosmetics and other fields.

[0004] Medium-chain triglycerides (MCT) are produced by the esterification of medium-chain fatty acids (caprylic acid C8:0 and capric acid C10:0) with glycerol. Caprylic acid and capric acid are primarily derived from coconut oil and palm kernel oil. Compared to ordinary cooking oils (long-chain triglycerides), medium-chain triglycerides are rapidly digested, generate ketone bodies, are rapidly absorbed, provide energy, and are not easily stored as fat. Based on these metabolic and functional characteristics, MCT is widely used as a fast and efficient energy supply in infant formula, weight management, sports nutrition, ketogenic diets, and special medical foods (ketogenic treatment for epilepsy).

[0005] Currently, most medium-chain triglyceride microcapsule powders on the market use milk proteins such as casein, sodium caseinate, and milk powder as the primary emulsifier, with glucose syrup, maltodextrin, and oligomaltosaccharides as auxiliary ingredients. These medium-chain triglyceride microcapsule powders are processed using microencapsulation and spray drying technologies. These medium-chain triglyceride microcapsule powders made with milk proteins and available carbohydrates are not suitable for people with milk protein allergies, vegetarians, those on a low-carb diet, diabetics, or those following a ketogenic diet (which requires high fat, low carbohydrates, and moderate protein). Chinese invention patent publication number CN115590196A discloses a high-ketogenic medium-chain triglyceride microcapsule powder and its preparation method. The formula contains 10-20 parts sodium caseinate, 10-20 parts resistant dextrin, 40-70 parts MCT oil, and 250-450 parts water. The resulting MCT powder has excellent emulsification and promotes rapid ketosis. However, the use of sodium caseinate as the primary emulsifier in this formula limits its use for vegetarians and those with milk protein allergies. Patent publication number CN104054849A, filed in China, discloses a high-content medium-chain triglyceride powdered oil and its preparation method. The formula contains 50%-80% medium-chain triglycerides, 10%-30% glucose syrup, 5%-26% modified starch, and the remainder as auxiliary agents. While the fat content can reach 80% and it is vegetarian, it still contains approximately 20% usable carbohydrates, which can easily cause blood sugar to rise. This limits the product's use in people with high blood sugar levels, those on a low-carb diet, the elderly with slow gastrointestinal motility and digestion, those on a ketogenic diet, and those managing weight loss.

[0006] Therefore, a low-carb vegetarian medium-chain triglyceride microcapsule powder and a preparation method are proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide a low-carb vegetarian medium-chain triglyceride microcapsule powder and a preparation method thereof, so as to solve the problem of limited use of the functional oil microcapsule powder proposed in the above background technology among vegetarians, people on a low-carb diet, people with high blood sugar, the elderly with slow gastrointestinal motility and slow digestion, people on a ketogenic diet, and people on weight loss and weight management.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] The invention discloses a low-carb vegetarian medium-chain triglyceride microcapsule powder, which comprises the following components in percentage by weight: 1-80% of carbohydrates containing dietary fiber, 0-80% of plant protein, 10%-80% of medium-chain triglycerides, and 0-5% of an emulsifier.

[0010] According to the above technical solution, the dietary fiber-containing carbohydrates are selected from one or more of gum arabic, resistant dextrin, oligomaltodextrose, polydextrose, and inulin.

[0011] According to the above technical solution, the plant protein is selected from one or more of soy protein, pea protein, rice protein, mung bean protein, chickpea protein and corn protein.

[0012] According to the above technical solution, the emulsifier is selected from one or more of mono- and diglycerol fatty acid esters, sodium stearoyl lactylate, phospholipids, calcium stearoyl lactylate, diacetyl tartaric acid mono- and diglycerides, citric acid fatty acid glycerides, and sucrose fatty acid esters.

[0013] A method for preparing low-carb vegetarian medium-chain triglyceride microcapsule powder, comprising the following steps:

[0014] S1. Preparation of the aqueous phase wall material: The water in the aqueous phase tank is maintained at 50 ℃ -70 ℃, 1-80% of carbohydrates containing dietary fiber and 0-80% plant protein are added to the aqueous phase tank, stirred, and kept warm for standby to obtain the aqueous phase wall material;

[0015] S2. Preparation of the core oil phase: 10% -80% medium-chain triglycerides were added to the oil phase tank, heated to 50 ℃ -70 ℃, 0% -5% emulsifier was added, and the heat was kept aside to obtain the core oil phase;

[0016] S3. Mixing the water and oil phases: Add the core oil phase into the wall water phase and stir to mix evenly to obtain an emulsion;

[0017] S4 emulsification homogenization: The emulsion prepared in S3 was homogenized 1-2 times by a homogenizer at a pressure of 10-50Mpa to obtain a uniform emulsion;

[0018] S5. Spray drying: The uniform emulsion prepared in S4 is pumped into a spray drying tower for drying to prepare low-carb vegetarian medium-chain triglyceride microcapsule powder, which is then passed through a 20-mesh sieve to obtain a finished low-carb vegetarian medium-chain triglyceride microcapsule powder.

[0019] According to the above technical solution, in S5, the air inlet temperature of the spray drying tower is 150°C-170°C, and the air outlet temperature is 60°C-80°C.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention proposes a low-carb vegetarian medium-chain triglyceride microcapsule powder and a preparation method thereof, and the prepared low-carb vegetarian medium-chain triglyceride microcapsule powder has an available carbohydrate content of no more than 5g / 100g, and can be claimed to be low in carbohydrates according to GB-28050. At the same time, the low-carb vegetarian medium-chain triglyceride microcapsule powder prepared by the present invention has good stability and low surface oil, and can be processed into various foods as a functional food raw material for vegetarians, people on a low-carb diet, people with high blood sugar, the elderly with slow gastrointestinal motility and slow digestion, people on a ketogenic diet, and people managing weight loss, etc. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] A low-carb vegetarian medium-chain triglyceride microcapsule powder is provided. The low-carb vegetarian medium-chain triglyceride microcapsule powder uses vegetarian low-carb plant protein, gum arabic (acacia), and dietary fiber-rich resistant dextrin, oligosaccharide, polydextrose, inulin, etc. as wall materials, and medium-chain triglyceride as a core material. An emulsifier is added, and after stirring, shearing, and homogenization, a uniform emulsion is obtained. The emulsion is spray-dried to obtain the low-carb vegetarian medium-chain triglyceride microcapsule powder. The low-carb vegetarian medium-chain triglyceride microcapsule powder includes the following components in percentage by weight:

[0023] 1-80% of dietary fiber-containing carbohydrates, wherein the dietary fiber-containing carbohydrates are selected from one or more of gum arabic, resistant dextrin, isomaltooligosaccharide, polydextrose, and inulin;

[0024] 0-80% plant protein, the plant protein being selected from one or more of soy protein, pea protein, rice protein, mung bean protein, chickpea protein, and corn protein;

[0025] Medium chain triglycerides 10%-80%;

[0026] 0-5% emulsifier, the emulsifier is selected from one or more of mono- and diglycerol fatty acid esters, sodium stearoyl lactylate, phospholipids, calcium stearoyl lactylate, diacetyl tartaric acid mono- and diglycerides, citric acid fatty acid glycerides, and sucrose fatty acid esters;

[0027] A method for preparing low-carb vegetarian medium-chain triglyceride microcapsule powder, the preparation method comprising the following steps:

[0028] S1. Preparation of the aqueous phase wall material: The water in the aqueous phase tank is maintained at 50 ℃ -70 ℃, 1-80% of carbohydrates containing dietary fiber and 0-80% plant protein are added to the aqueous phase tank, stirred, and kept warm for standby to obtain the aqueous phase wall material;

[0029] S2. Preparation of the core oil phase: 10% -80% medium-chain triglycerides were added to the oil phase tank, heated to 50 ℃ -70 ℃, 0% -5% emulsifier was added, and the heat was kept aside to obtain the core oil phase;

[0030] S3. Mixing the water and oil phases: Add the core oil phase into the wall water phase and stir to mix evenly to obtain an emulsion;

[0031] S4 emulsification homogenization: The emulsion prepared in S3 was homogenized 1-2 times by a homogenizer at a pressure of 10-50Mpa to obtain a uniform emulsion;

[0032] S5. Spray drying: The uniform emulsion prepared in S4 is pumped into a spray drying tower for drying. The inlet air temperature of the spray drying tower is 150°C-170°C, and the outlet air temperature is 60°C-80°C to prepare low-carb vegetarian medium-chain triglyceride microcapsule powder. The low-carb vegetarian medium-chain triglyceride microcapsule powder is passed through a 20-mesh sieve to obtain a finished low-carb vegetarian medium-chain triglyceride microcapsule powder.

[0033] Example 1

[0034] The wall material is 15% pea protein and 4% resistant dextrin, the core material is 80% medium-chain triglycerides, and the emulsifier is 1.0% mono- and di-glycerol fatty acid esters. The specific preparation steps are as follows:

[0035] S1. Preparation of the aqueous phase of the wall material: The water in the aqueous phase tank is maintained at 55-60 ° C, according to the solid content of 50%, 15% pea protein is added to the aqueous phase by stirring, dissolving, and hydrating for 20-30 minutes, then 4% resistant dextrin is added, stirred for 10-20 minutes until uniform, and kept warm for standby to obtain the aqueous phase of the wall material;

[0036] S2. Preparation of the core oil phase: 80% medium chain triglycerides and 1% mono- and diglycerol fatty acid esters were added to the oil phase tank, heated to 55-60 ° C, kept warm for standby use, and the core oil phase was obtained;

[0037] S3 water and oil two-phase mixing: the core material oil phase into the wall material water phase, stirring for 10-20 minutes, mixing evenly, to obtain an emulsion;

[0038] S4 emulsification homogenization: The emulsion obtained in S3 was homogenized twice by a homogenizer at a pressure of 15-30Mpa to form a uniform emulsion. The uniform emulsion was stored in a temporary tank and the uniform emulsion was taken every 10 minutes to observe whether stratification was achieved.

[0039] S5. Spray drying: The uniform emulsion prepared in S4 is pumped into a spray drying tower for drying at an inlet air temperature of 160°C-170°C and an outlet air temperature of 70°C-80°C to prepare a low-carb vegetarian medium-chain triglyceride microcapsule powder. The powder is then passed through a 20-mesh sieve to obtain a finished low-carb vegetarian medium-chain triglyceride microcapsule powder.

[0040] The homogeneous emulsion in the temporary storage tank during the spray drying process showed no stratification. The resulting medium-chain triglyceride microcapsule powder was tested and was a white to pale yellow free-flowing powder with a total fat content of 79.5%, a surface oil content of 1.2%, and an available carbohydrate content (available carbohydrate content = total carbohydrate minus dietary fiber) of 1.1%.

[0041] Example 2

[0042] 40% soy protein and 10% inulin are used as the wall material, and 50% medium-chain triglycerides are used as the core material. The specific preparation steps are as follows:

[0043] S1. Preparation of the aqueous phase of the wall material: The water in the aqueous phase tank is maintained at 55-60 ° C according to the solid content of 40% of the feed, 40% of the soy protein is added to the aqueous phase by stirring, dissolving, hydrating for 20-30 minutes, then adding 10% inulin, stirring for 10-20 minutes until uniform, heat and set aside, to obtain the aqueous phase of the wall material;

[0044] S2. Preparation of the core oil phase: 50% of medium-chain triglycerides were added to the oil phase tank, heated to 55-60 ° C, stirred for 10-20 minutes, and kept warm to obtain the core oil phase;

[0045] S3 water and oil two-phase mixing: the core material oil phase into the wall material water phase, stirring for 10-20 minutes, mixing evenly, to obtain an emulsion;

[0046] S4 emulsification homogenization: The emulsion obtained in S3 was homogenized once by a homogenizer at a pressure of 10-20Mpa to form a uniform emulsion. The uniform emulsion was stored in a temporary storage tank and the uniform emulsion was taken every 10 minutes to observe whether stratification was observed;

[0047] S5. Spray drying: The uniform emulsion prepared in S4 is pumped into a spray drying tower for drying at an inlet air temperature of 160°C-170°C and an outlet air temperature of 70°C-80°C to prepare a low-carb vegetarian medium-chain triglyceride microcapsule powder. The powder is then passed through a 20-mesh sieve to obtain a finished low-carb vegetarian medium-chain triglyceride microcapsule powder.

[0048] During the spray drying process, the homogeneous emulsion in the temporary storage tank did not separate. The obtained medium-chain triglyceride microcapsule powder was a light yellow powder with a total fat content of 49.8%, a surface oil content of 0.2%, and an available carbohydrate content (available carbohydrate content = total carbohydrate minus dietary fiber) of 2.7%.

[0049] Example 3

[0050] The wall material is 24% gum arabic and 5% polydextrose, the core material is 70% medium-chain triglyceride, and the emulsifier is 1.0% sodium stearoyl lactylate. The specific preparation steps are as follows:

[0051] S1. Preparation of the aqueous phase of the wall material: Keep the water in the aqueous phase tank between 55-60 ° C, according to the 40% solids ingredients, add 24% gum arabic to the aqueous phase tank, stir for 25-30 minutes to completely dissolve, then add 5% resistant dextrin and stir for 10-20 minutes until uniform, keep warm and set aside to obtain the aqueous phase of the wall material;

[0052] S2. Preparation of the core oil phase: 70% medium-chain triglycerides and 1.0% sodium stearoyl lactylate were added to the oil phase tank, heated to 55-60 ° C, stirred for 10-20 minutes until uniform, kept warm for later use, and the core oil phase was obtained;

[0053] S3 water and oil two-phase mixing: the core material oil phase into the wall material water phase, stirring for 10-20 minutes, mixing evenly, to obtain an emulsion;

[0054] S4 emulsification homogenization: The emulsion obtained in S3 was homogenized twice by a homogenizer at a pressure of 20-30Mpa to form a uniform emulsion. The uniform emulsion was stored in a temporary storage tank and the uniform emulsion was taken every 10 minutes to observe whether stratification was achieved.

[0055] S5. Spray drying: The uniform emulsion prepared in S4 is pumped into a spray drying tower for drying at an inlet air temperature of 150°C-160°C and an outlet air temperature of 60°C-70°C to prepare a low-carb vegetarian medium-chain triglyceride microcapsule powder. The powder is then passed through a 20-mesh sieve to obtain a finished low-carb vegetarian medium-chain triglyceride microcapsule powder.

[0056] During the spray drying process, the homogeneous emulsion in the temporary storage tank did not separate. The obtained medium-chain triglyceride microcapsule powder was a light yellow powder with a total fat content of 69.3%, a surface oil content of 8.0%, and an available carbohydrate content (available carbohydrate content = total carbohydrate minus dietary fiber) of 1.7%.

[0057] Example 4

[0058] The wall material is 20% gum arabic and 9.8% isomaltooligosaccharide, the core material is 70% medium-chain triglyceride, and the emulsifier is 0.2% calcium stearoyl lactylate. The specific preparation steps are as follows:

[0059] S1. Preparation of the aqueous phase of the wall material: The water in the aqueous phase tank is maintained at 55-60 ° C, according to the 40% solids ingredients, 20% gum arabic is added to the aqueous phase tank, stirred for 25-30 minutes to completely dissolve, then added 9.8% isomaltooligosaccharide and stirred for 10-20 minutes until uniform, keep warm and set aside to obtain the aqueous phase of the wall material;

[0060] S2. Preparation of the core oil phase: 70% medium-chain triglycerides and 0.2% calcium stearoyl lactylate were added to the oil phase tank, heated to 55-60 ° C, stirred for 10-20 minutes until uniform, kept warm for later use, and the core oil phase was obtained;

[0061] S3 water and oil two-phase mixing: the core material oil phase into the wall material water phase, stirring for 10-20 minutes, mixing evenly, to obtain an emulsion;

[0062] S4 emulsification homogenization: The emulsion obtained in S3 was homogenized twice by a homogenizer at a pressure of 20-30Mpa to form a uniform emulsion. The uniform emulsion was stored in a temporary storage tank and the uniform emulsion was taken every 10 minutes to observe whether stratification was achieved.

[0063] S5. Spray drying: The uniform emulsion prepared in S4 is pumped into a spray drying tower for drying at an inlet air temperature of 150°C-160°C and an outlet air temperature of 60°C-70°C to prepare a low-carb vegetarian medium-chain triglyceride microcapsule powder. The powder is then passed through a 20-mesh sieve to obtain a finished low-carb vegetarian medium-chain triglyceride microcapsule powder.

[0064] The uniform emulsion in the temporary storage tank during the spray drying process did not separate. The medium-chain triglyceride microcapsule powder obtained by spray drying was a light yellow powder with a total fat content of 69.2%, a surface oil content of 6.2%, and an available carbohydrate content (available carbohydrate content = total carbohydrate minus dietary fiber) of 2.0%.

[0065] Table 1: Example raw material ratio and test results

[0066]

[0067] As can be seen from the test results in Table 1, the available carbohydrate content (sugar) in the prepared low-carb vegetarian medium-chain triglyceride microcapsule powder is no more than 5g / 100g (5%). According to GB-28050, it can be claimed to be low in carbohydrates (sugar). At the same time, the low-carb vegetarian medium-chain triglyceride microcapsule powder prepared by the present invention has good stability and low surface oil. It can be processed into various foods as a functional food raw material for vegetarians, people on a low-carb diet, people with high blood sugar, the elderly with slow gastrointestinal motility and slow digestion, people on a ketogenic diet, and people managing weight loss, etc.

[0068] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A low-carb vegetarian medium-chain triglyceride microcapsule powder, characterized by: The low-carb vegetarian medium-chain triglyceride microcapsule powder comprises the following components in percentage by mass: 1-80% of carbohydrates containing dietary fiber, 0-80% of plant protein, 10%-80% of medium-chain triglycerides, and 0-5% of an emulsifier.

2. The low-carb vegetarian medium-chain triglyceride microcapsule powder according to claim 1, characterized in that: The dietary fiber-containing carbohydrates are selected from one or more of gum arabic, resistant dextrin, isomaltooligosaccharide, polydextrose, and inulin.

3. The low-carb vegetarian medium-chain triglyceride microcapsule powder according to claim 1, characterized in that: The plant protein is selected from one or more of soy protein, pea protein, rice protein, mung bean protein, chickpea protein and corn protein.

4. The low-carb vegetarian medium-chain triglyceride microcapsule powder according to claim 1, characterized in that: The emulsifier is selected from one or more of mono- and diglycerol fatty acid esters, sodium stearoyl lactylate, phospholipids, calcium stearoyl lactylate, diacetyl tartaric acid mono- and diglycerides, citric acid fatty acid glycerides, and sucrose fatty acid esters.

5. A method for preparing low-carbohydrate vegetarian medium-chain triglyceride microcapsule powder, characterized in that: The preparation method comprises the following steps: S1. Preparation of the aqueous phase wall material: The water in the aqueous phase tank is maintained at 50 ℃ -70 ℃, 1-80% of carbohydrates containing dietary fiber and 0-80% plant protein are added to the aqueous phase tank, stirred, and kept warm for standby to obtain the aqueous phase wall material; S2. Preparation of the core oil phase: 10% -80% medium-chain triglycerides were added to the oil phase tank, heated to 50 ℃ -70 ℃, 0% -5% emulsifier was added, and the heat was kept aside to obtain the core oil phase; S3. Mixing the water and oil phases: Add the core oil phase into the wall water phase and stir to mix evenly to obtain an emulsion; S4 emulsification homogenization: The emulsion prepared in S3 was homogenized 1-2 times by a homogenizer at a pressure of 10-50Mpa to obtain a uniform emulsion; S5. Spray drying: The uniform emulsion prepared in S4 is pumped into a spray drying tower for drying to prepare low-carb vegetarian medium-chain triglyceride microcapsule powder, which is then passed through a 20-mesh sieve to obtain a finished low-carb vegetarian medium-chain triglyceride microcapsule powder.

6. The method for preparing a low-carb vegetarian medium-chain triglyceride microcapsule powder according to claim 5, characterized in that: In S5, the air inlet temperature of the spray drying tower is 150°C-170°C, and the air outlet temperature is 60°C-80°C.

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