A process for stably filling voids in porous particles

Abstract

The present invention discloses a process method for stably filling voids in porous particles, belonging to the technical field of puffing processing. The method comprises the following steps: First spraying: uniformly spraying oil on the surface and voids of the porous particles in a vacuum to obtain pretreated particles; Second spraying: dissolving powder in oil to prepare a liquid slurry, and uniformly spraying the liquid slurry on the surface and voids of the pretreated particles in a vacuum; Third spraying: weighing the powder, and spraying and filling 30% of the powder mass into the voids of the particles after the second spraying at normal pressure, and standing for 90 s after spraying; Fourth spraying: spraying and filling 70% of the weighed powder mass into the voids of the particles after the third spraying at normal pressure, and standing for 60 s after spraying to complete the filling. It promotes the maximum firmness of the filling powder in the particle voids, improves the firmness of powder filling, enhances the product quality, avoids waste, reduces the production cost, and effectively solves the problem of the powder falling off after void filling.

Description

Technical Field

[0001] The invention belongs to the technical field of puffing processing, and in particular relates to a process method for stably filling voids in porous particles. Background Art

[0002] At present, people's living standards are getting higher and higher, and more and more families are starting to keep pets. With the improvement of modern people's living standards and changes in lifestyles, pets have become an indispensable part of some people's daily lives. As a result, the demand for various pet foods is also increasing, which provides a good opportunity for the pet product market. Consumers are also paying more and more attention to key issues such as the nutritional balance, comprehensiveness and palatability of pet food when feeding their pets.

[0003] To ensure their products meet the standards expected by pet owners, pet food manufacturers must ensure both nutritional and flavorful results. While emphasizing high-quality ingredients, product quality inspection and control are equally important. Proper processing methods are crucial for blending high-quality ingredients into nutritionally balanced diets. These methods should facilitate starch dissolution, avoid over-processing that damages proteins, and meet physical requirements for the final product, such as size, shape, and density.

[0004] Extruded pet food refers to loose, porous pellets made using extrusion technology. The unique mold used in the extrusion process creates a porous structure within the pellets. Extruded pet food not only offers the advantages of conventional hard pellets, such as good palatability and ease of transportation, but also boasts a high degree of starch gelatinization and easily digestible protein.

[0005] It's common to spray flavorings onto the surface and interstices of puffed pet food to enhance its acceptance. Since dogs use their sense of smell to pick up food, and cats use their tongues to taste, it's crucial for pets to directly perceive the flavor and aroma of ingredients. Consequently, powdered or slurried flavor enhancers and oils are sprayed onto the surface of puffed pet food pellets to enhance the food's appeal. In other words, the coating process in pet food processing is a key factor influencing pet palatability.

[0006] The key factor influencing spraying effectiveness is uniform spraying. The goal of uniform spraying for puffed pet food is to ensure that pets can easily and maximize the aroma and delicious flavor. Pets can sense whether the pellets are evenly sprayed. For example, cats will turn their noses up at pellets that are not evenly sprayed. As spraying becomes more uniform, pets' palatability increases. Furthermore, every step in the spraying process ensures that the flavor enhancer is evenly distributed, maximizing its proximity to the noses and taste buds of cats and dogs, and maximizing its delicious effect.

[0007] Adding appropriate powdery materials in the spraying process can achieve the filling of surface voids with powder to reach a unique sensory effect. However, the firmness of the powder in the particle voids is unstable. When it falls freely from a height of dozens of meters during subsequent transportation, especially when it falls into the finished product bin, it generates a huge impact force with the bin wall, and the powder in the particle voids is prone to falling off, resulting in a low qualified rate of the first production and a large amount of waste. Summary of the Invention

[0008] The present invention discloses a process method for stably filling voids in porous particles, belonging to the technical field of puffing processing. It includes the following steps: First spraying: Uniformly spraying grease on the surface and voids of the porous particles in a vacuum to obtain pretreated particles; Second spraying: Dissolving powder in grease to prepare a liquid slurry, and uniformly spraying the liquid slurry on the surface and voids of the pretreated particles in a vacuum; Third spraying: Weighing the powder, and spraying and filling 30% of the powder mass into the voids of the particles after the second spraying at normal pressure, and standing for 90 s after spraying; Fourth spraying: Spraying and filling 70% of the powder mass mentioned in the step (3) into the voids of the particles after the third spraying at normal pressure, and standing for 60 s after spraying to complete the filling. It promotes the maximization of the firmness of the filling powder in the particle voids, improves the firmness of the powder filling, enhances the product quality, avoids waste, reduces the production cost, and effectively solves the problem of the powder falling off after void filling.

[0009] The technical problems to be solved by the present invention are: improving the firmness of the powder filling, enhancing the product quality, avoiding waste, and reducing the production cost.

[0010] The object of the present invention can be achieved by the following technical solutions:

[0011] A process method for stably filling voids in porous particles includes the following steps:

[0012] (1) First spraying: Uniformly spraying grease on the surface and voids of the porous particles in a vacuum environment to obtain pretreated particles;

[0013] (2) Second spraying: Dissolving powder in grease to prepare a liquid slurry, and uniformly spraying the liquid slurry on the surface and voids of the pretreated particles in a vacuum environment;

[0014] (3) Third spraying: Weighing the powder, and spraying and filling 30% of the powder mass into the voids of the particles after the second spraying at normal pressure, and standing for 90 s after spraying;

[0015] (4) Fourth spraying: Spraying and filling 70% of the powder mass mentioned in the step (3) into the voids of the particles after the third spraying at normal pressure, and standing for 60 s after spraying to complete the filling.

[0016] As a preferred technical solution of the present invention, the preparation of the powder comprises the following steps:

[0017] (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 10 - 30 min, freeze, and dry to obtain protein blocks;

[0018] (22) Add corn starch to deionized water, heat and stir at 70 - 85 °C for 30 s, and dry at 110 °C to obtain pretreated starch;

[0019] (23) Take the protein blocks and add them to deionized water, stir to obtain a suspension. Take the pretreated starch and add it to the suspension, heat at 90 - 95 °C for 2 - 4 min, freeze-dry, pulverize, sieve, and dry to obtain modified starch;

[0020] (24) Take the modified starch and dissolve it in deionized water, heat in a water bath at 35 - 40 °C, dropwise add octenyl succinic anhydride while stirring, and dropwise add an alkali solution to control the pH of the reaction system to 8.4 - 8.6 while dropping the octenyl succinic anhydride. React for 4 h. After the reaction ends, adjust the pH of the system to neutral with an acid solution, separate, take the organic phase, wash with water, wash with alcohol, and dry to obtain a preform;

[0021] (25) Pulverize and grind black rice bran, add it to ethanol. Take the preform and add it to the ethanol, mix ultrasonically for 25 - 30 min, dry at 80 - 85 °C, and grind to obtain the powder.

[0022] As a preferred technical solution of the present invention, in step (1), the oil is at least one of chicken oil, soybean oil, and fish oil.

[0023] As a preferred technical solution of the present invention, the mass ratio of the perforated particles, the oil in the first spraying, the powder in the second spraying, the oil in the second spraying, and the powder for the third spraying and the fourth spraying is 1000:120 - 180:50 - 80:200:100 - 200.

[0024] As a preferred technical solution of the present invention, the vacuum degree of the first spraying is 650 - 750 mbar.

[0025] As a preferred technical solution of the present invention, the vacuum degree of the second spraying is 850 - 950 mbar.

[0026] As a preferred technical solution of the present invention, in step (21), the dosage ratio of the soy protein isolate to the deionized water is 5 - 10 g:80 - 100 mL.

[0027] As a preferred technical solution of the present invention, in step (22), the dosage ratio of the corn starch to the deionized water is 10-20 g: 100 mL.

[0028] As a preferred technical solution of the present invention, in step (23), the dosage ratio of the protein block, the deionized water, and the pretreated starch is 5-10 g: 200 mL: 50-80 g.

[0029] As a preferred technical solution of the present invention, in step (24), the mass ratio of the modified starch, the deionized water, and the octenyl succinic anhydride is 10-12: 100-150: 4-6; in step (25), the dosage ratio of the black rice bran, the ethanol, and the preform is 8-12 g: 50-100 mL: 30-50 g.

[0030] Advantages of the present invention:

[0031] (1) The process method for stably filling voids in perforated particles disclosed in the present invention adopts four spraying processes: during the first spraying process, the vacuum degree is controlled between 650-750 mbar to ensure that the surface and voids of the particles have appropriate viscosity under the condition of uniform spraying of the grease; during the second spraying process, the vacuum degree is controlled between 850-950 mbar to cover the liquid slurry and enhance the appropriate viscosity in the surface and voids; during the third and fourth spraying processes, the voids are filled in two steps to maximize the firmness of the filling powder in the particle voids, effectively solving the problem of the filling falling off after the voids are filled. The stable filling rate of the particles reaches more than 99%, improving the firmness of the powder filling, enhancing the product quality, avoiding waste, reducing the production cost, and effectively solving the problem of the filling falling off after the voids are filled.

[0032] (2) The process method for stably filling voids in perforated particles disclosed in the present invention pretreats the corn starch during the powder preparation process to improve its solubility in water, making the prepared modified starch more uniform.

[0033] (3) The process method for stably filling voids in perforated particles disclosed in the present invention esterifies the modified starch with the anhydride to generate esters during the powder preparation process, improving the similar compatibility with the grease, making the bonding between the powder and the grease more firm, and improving the filling firmness;

[0034] Furthermore, adding black rice bran to the powder enhances the digestive performance of the prepared particles. Specific embodiments

[0035] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines examples to detail the specific embodiments, structures, features, and effects according to the present invention.

[0036] Example 1

[0037] A process for stably filling voids in perforated particles, comprising the following steps:

[0038] (1) First spraying: 120 parts by mass of chicken fat is evenly sprayed on the surface and voids of the 1000 parts by mass of perforated particles in a vacuum environment to obtain pretreated particles; the vacuum degree of the first spraying is 650 mbar;

[0039] (2) Second spraying: 50 parts by mass of powder is dissolved in 200 parts by mass of chicken fat to prepare a liquid slurry, and the liquid slurry is evenly sprayed on the surface and voids of the pretreated particles in a vacuum environment; the vacuum degree of the second spraying is 850 mbar;

[0040] (3) Third spraying: Weigh 100 parts by mass of the powder, and 30% of the mass of the powder is spray-filled into the voids of the particles after the second spraying under normal pressure, and stand for 90 s after spraying;

[0041] (4) Fourth spraying: 70% of the mass of the powder weighed in step (3) is spray-filled into the voids of the particles after the third spraying under normal pressure, and stand for 60 s after spraying to complete the filling.

[0042] The preparation of the powder comprises the following steps:

[0043] (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 10 min, freeze, and dry to obtain protein blocks; the dosage ratio of soy protein isolate to deionized water is 5 g: 80 mL;

[0044] (22) Add corn starch to deionized water, heat and stir at 70 °C for 30 s, and dry at 110 °C to obtain pretreated starch; the dosage ratio of corn starch to deionized water is 10 g: 100 mL;

[0045] (23) Take the protein blocks and add them to deionized water, stir to obtain a suspension, take the pretreated starch and add it to the suspension, heat at 90 °C for 2 min, freeze-dry, crush, sieve, and dry to obtain modified starch; the dosage ratio of protein blocks, deionized water, and pretreated starch is 5 g: 200 mL: 50 g;

[0046] (24) Dissolve the modified starch in deionized water, heat it in a water bath at 35 °C, add octenyl succinic anhydride dropwise while stirring, and add a 3% sodium hydroxide solution dropwise to control the pH of the reaction system to 8.4 while adding octenyl succinic anhydride. React for 4 h. After the reaction is completed, adjust the pH of the system to neutral with 6% hydrochloric acid, separate, wash the organic phase with water, wash with alcohol, and dry to obtain a preform; the mass ratio of the modified starch, deionized water, and octenyl succinic anhydride is 10 g: 100 g: 4 g;

[0047] (25) Crush and grind black rice bran, add it to ethanol, add the preform to the ethanol, mix ultrasonically for 25 min, dry at 80 °C, and grind to obtain the powder; the dosage ratio of the black rice bran, ethanol, and preform is 8 g: 50 mL: 30 g.

[0048] The stable filling rate of the particles reaches 99.3%.

[0049] Example 2

[0050] A process for stably filling voids in porous particles includes the following steps:

[0051] (1) First spraying: Uniformly spray 150 parts by mass of soybean oil on the surface and voids of the porous particles in a vacuum environment to obtain pretreated particles; the vacuum degree of the first spraying is 700 mbar;

[0052] (2) Second spraying: Dissolve 65 parts by mass of powder in 200 parts by mass of soybean oil to prepare a liquid slurry, and uniformly spray the liquid slurry on the surface and voids of the pretreated particles in a vacuum environment; the vacuum degree of the second spraying is 900 mbar;

[0053] (3) Third spraying: Weigh 150 parts by mass of the powder, and spray and fill 30% of the mass of the powder into the voids of the particles after the second spraying under normal pressure, and let it stand for 90 s after spraying;

[0054] (4) Fourth spraying: Spray and fill 70% of the mass of the powder weighed in step (3) into the voids of the particles after the third spraying under normal pressure, and let it stand for 60 s after spraying to complete the filling.

[0055] The preparation of the powder includes the following steps:

[0056] (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 15 min, freeze, and dry to obtain protein blocks; the dosage ratio of soy protein isolate and deionized water is 7 g: 90 mL;

[0057] (22) Add corn starch to deionized water, heat and stir at 80 °C for 30 s, and dry at 110 °C to obtain pretreated starch; the dosage ratio of the corn starch to the deionized water is 15 g: 100 mL;

[0058] (23) Take the protein mass and add it to deionized water, stir to obtain a suspension, take the pretreated starch and add it to the suspension, heat at 92 °C for 3 min, freeze-dry, crush, sieve, and dry to obtain modified starch; the dosage ratio of the protein mass, deionized water, and pretreated starch is 7 g: 200 mL: 65 g;

[0059] (24) Take the modified starch and dissolve it in deionized water, heat in a water bath at 37 °C, while stirring, dropwise add octenyl succinic anhydride, and while dropping octenyl succinic anhydride, dropwise add a 3% sodium hydroxide solution by mass fraction to control the pH of the reaction system to 8.5, react for 4 h, after the reaction ends, adjust the pH of the system to neutral with 6% hydrochloric acid by mass fraction, separate, take the organic phase, wash with water, wash with alcohol, and dry to obtain a preform; the mass ratio of the modified starch, deionized water, and octenyl succinic anhydride is 11 g: 120 g: 5 g;

[0060] (25) Crush and grind black rice bran, add it to ethanol, take the preform and add it to ethanol, ultrasonically mix for 27 min, dry at 82 °C, and grind to obtain the powder; the dosage ratio of the black rice bran, ethanol, and preform is 10 g: 70 mL: 40 g.

[0061] The stable filling rate of the particles reaches 99.37%.

[0062] Example 3

[0063] A process method for stably filling voids in porous particles, comprising the following steps:

[0064] (1) First spraying: Uniformly spray 180 parts by mass of fish oil on the surface and voids of the 1000 parts by mass of porous particles in a vacuum environment to obtain pretreated particles; the vacuum degree of the first spraying is 750 mbar;

[0065] (2) Second spraying: Dissolve 80 parts by mass of the powder in 200 parts by mass of fish oil to obtain a liquid slurry, and uniformly spray the liquid slurry on the surface and voids of the pretreated particles in a vacuum environment; the vacuum degree of the second spraying is 950 mbar;

[0066] (3) Third spraying: Weigh 200 parts by mass of the powder, take 30% of the powder mass and spray and fill it into the voids of the particles after the second spraying under normal pressure, and let it stand for 90 s after spraying;

[0067] (4) Fourth spraying: 70% of the powder mass weighed in step (3) is spray-filled into the particle voids after the third spraying under normal pressure, and after spraying, it is left standing for 60 s to complete the filling.

[0068] The preparation of the powder includes the following steps:

[0069] (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 30 min, freeze, and dry to obtain protein blocks; the dosage ratio of soy protein isolate to deionized water is 10 g: 100 mL;

[0070] (22) Add corn starch to deionized water, heat and stir at 85 °C for 30 s, and dry at 110 °C to obtain pretreated starch; the dosage ratio of corn starch to deionized water is 20 g: 100 mL;

[0071] (23) Take the protein blocks and add them to deionized water, stir to obtain a suspension, take the pretreated starch and add it to the suspension, heat at 95 °C for 4 min, freeze-dry, crush, sieve, and dry to obtain modified starch; the dosage ratio of protein blocks, deionized water, and pretreated starch is 10 g: 200 mL: 80 g;

[0072] (24) Take the modified starch and dissolve it in deionized water, heat in a water bath at 40 °C, dropwise add octenyl succinic anhydride while stirring, and while dropping octenyl succinic anhydride, dropwise add a 3% sodium hydroxide solution to control the pH of the reaction system to 8.6, react for 4 h, after the reaction ends, adjust the pH of the system to neutral with 6% hydrochloric acid, separate, take the organic phase, wash with water, wash with alcohol, and dry to obtain a preform; the mass ratio of modified starch, deionized water, and octenyl succinic anhydride is 12 g: 150 g: 6 g;

[0073] (25) Crush and grind black rice bran, add it to ethanol, take the preform and add it to ethanol, ultrasonically mix for 30 min, dry at 85 °C, and grind to obtain the powder; the dosage ratio of black rice bran, ethanol, and preform is 12 g: 100 mL: 50 g.

[0074] The stable filling rate of the particles reaches 99.28%.

[0075] Comparative Example 1

[0076] A process method for stably filling the voids in perforated particles, including the following steps:

[0077] (1) Dissolve 50 parts by mass of powder in 200 parts by mass of chicken oil to obtain a liquid slurry, and uniformly spray the liquid slurry on the surface and voids of the perforated particles in a vacuum environment; the vacuum degree of the spraying is 850 mbar;

[0078] (2) Weigh 100 parts by mass of the said powder, and spray and fill 30% of the mass of the powder into the voids of the particles after spraying in the step (1) under normal pressure. After spraying, let it stand for 90 s.

[0079] (3) Spray and fill 70% of the mass of the powder weighed in the step (2) into the voids of the particles after spraying in the step (2) under normal pressure. After spraying, let it stand for 60 s to complete the filling.

[0080] The preparation of the said powder includes the following steps:

[0081] (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 10 min, freeze and dry to obtain protein blocks; the dosage ratio of soy protein isolate to deionized water is 5 g: 80 mL.

[0082] (22) Add corn starch to deionized water, heat and stir at 70 °C for 30 s, and dry at 110 °C to obtain pretreated starch; the dosage ratio of corn starch to deionized water is 10 g: 100 mL.

[0083] (23) Take the said protein blocks and add them to deionized water, stir to obtain a suspension. Take the said pretreated starch and add it to the suspension, heat at 90 °C for 2 min, freeze-dry, pulverize, sieve and dry to obtain modified starch; the dosage ratio of protein blocks, deionized water and pretreated starch is 5 g: 200 mL: 50 g.

[0084] (24) Take the said modified starch and dissolve it in deionized water, heat it in a water bath at 35 °C, while stirring, dropwise add octenyl succinic anhydride. While dropping octenyl succinic anhydride, dropwise add a sodium hydroxide solution with a mass fraction of 3% to control the pH of the reaction system to 8.4, react for 4 h. After the reaction ends, adjust the pH of the system to neutral with a hydrochloric acid solution with a mass fraction of 6%, separate, take the organic phase, wash with water, wash with alcohol and dry to obtain a preform; the mass ratio of modified starch, deionized water and octenyl succinic anhydride is 10 g: 100 g: 4 g.

[0085] (25) Pulverize and grind black rice bran, add it to ethanol. Take the said preform and add it to ethanol, mix ultrasonically for 25 min, dry at 80 °C and grind to obtain the said powder; the dosage ratio of black rice bran, ethanol and preform is 8 g: 50 mL: 30 g.

[0086] The stable filling rate of the particles reaches 97.25%.

[0087] Comparative Example 2

[0088] A process for stably filling the voids in porous particles includes the following steps:

[0089] (1) First spraying: Evenly spray 120 parts by mass of chicken fat on the surface and voids of the 1000 parts by mass of perforated particles in a vacuum environment to obtain pretreated particles; the vacuum degree of the first spraying is 650 mbar;

[0090] (2) Second spraying: Dissolve 50 parts by mass of powder in 200 parts by mass of chicken fat to prepare a liquid slurry, and evenly spray the liquid slurry on the surface and voids of the pretreated particles in a vacuum environment; the vacuum degree of the second spraying is 850 mbar;

[0091] (3) Third spraying: Weigh 100 parts by mass of the powder, and spray and fill 30% of the powder mass into the voids of the particles after the second spraying at normal pressure, and let it stand for 90 s after spraying;

[0092] (4) Fourth spraying: Spray and fill 70% of the powder mass weighed in step (3) into the voids of the particles after the third spraying at normal pressure, and let it stand for 60 s after spraying to complete the filling.

[0093] The preparation of the powder includes the following steps:

[0094] (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 10 min, freeze, and dry to obtain protein blocks; the dosage ratio of soy protein isolate to deionized water is 5 g: 80 mL;

[0095] (22) Take the protein blocks and add them to deionized water, stir to obtain a suspension, add corn starch to the suspension, heat at 90 °C for 2 min, freeze-dry, crush, sieve, and dry to obtain modified starch; the dosage ratio of protein blocks, deionized water, and pretreated starch is 5 g: 200 mL: 50 g;

[0096] (23) Take the modified starch and dissolve it in deionized water, heat it in a water bath at 35 °C, dropwise add octenyl succinic anhydride while stirring, and dropwise add a 3% sodium hydroxide solution while adding octenyl succinic anhydride to control the pH of the reaction system to 8.4, react for 4 h, after the reaction ends, adjust the pH of the system to neutral with 6% hydrochloric acid, separate, take the organic phase, wash with water, wash with alcohol, and dry to obtain a preform; the mass ratio of modified starch, deionized water, and octenyl succinic anhydride is 10 g: 100 g: 4 g;

[0097] (24) Crush and grind black rice bran, add it to ethanol, take the preform and add it to the ethanol, mix ultrasonically for 25 min, dry at 80 °C, and grind to obtain the powder; the dosage ratio of black rice bran, ethanol, and preform is 8 g: 50 mL: 30 g.

[0098] The stable filling rate of the particles reaches 96.93%.

[0099] Comparative Example 3

[0100] A process method for stabilizing the voids in filled porous particles includes the following steps:

[0101] (1) First spraying: 120 parts by mass of chicken oil is evenly sprayed on the surface and voids of the 1000 parts by mass of porous particles in a vacuum environment to obtain pretreated particles; the vacuum degree of the first spraying is 650 mbar;

[0102] (2) Second spraying: 50 parts by mass of powder is dissolved in 200 parts by mass of chicken oil to prepare a liquid slurry, and the liquid slurry is evenly sprayed on the surface and voids of the pretreated particles in a vacuum environment; the vacuum degree of the second spraying is 850 mbar;

[0103] (3) Third spraying: Weigh 100 parts by mass of the powder, and 30% of the powder mass is spray-filled into the voids of the particles after the second spraying under normal pressure, and then left standing for 90 s after spraying;

[0104] (4) Fourth spraying: 70% of the powder mass weighed in step (3) is spray-filled into the voids of the particles after the third spraying under normal pressure, and then left standing for 60 s after spraying to complete the filling.

[0105] The preparation of the powder includes the following steps:

[0106] (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 10 min, freeze, and dry to obtain protein blocks; the dosage ratio of soy protein isolate to deionized water is 5 g: 80 mL;

[0107] (22) Add corn starch to deionized water, heat and stir at 70 °C for 30 s, and dry at 110 °C to obtain pretreated starch; the dosage ratio of corn starch to deionized water is 10 g: 100 mL;

[0108] (23) Take the protein blocks and add them to deionized water, stir to obtain a suspension, take the pretreated starch and add it to the suspension, heat at 90 °C for 2 min, freeze-dry, crush, sieve, and dry to obtain modified starch; the dosage ratio of protein blocks, deionized water, and pretreated starch is 5 g: 200 mL: 50 g;

[0109] (24) Crush and grind black rice bran, add it to ethanol, take the modified starch and add it to the ethanol, ultrasonically mix for 25 min, dry at 80 °C, and grind to obtain the powder; the dosage ratio of black rice bran, ethanol, and modified starch is 8 g: 50 mL: 30 g.

[0110] The stable filling rate of the particles reaches 94.59%.

[0111] The above are only the preferred embodiments of the present invention, and do not impose any formal restrictions on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content without departing from the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A process for stably filling voids in porous particles, characterized in that, It includes the following steps: (1) First spraying: Uniformly spray grease on the surface and voids of the perforated particles in a vacuum environment to obtain pretreated particles; (2) Second spraying: Dissolve the powder in grease to prepare a liquid slurry, and uniformly spray the liquid slurry on the surface and voids of the pretreated particles in a vacuum environment; (3) Third spraying: Weigh the powder, take 30% of the powder mass and spray it to fill the voids of the particles after the second spraying under normal pressure, and let it stand for 90 s after spraying; (4) Fourth spraying: Take 70% of the powder mass weighed in step (3) and spray it to fill the voids of the particles after the third spraying under normal pressure, and let it stand for 60 s after spraying to complete the filling; The preparation of the powder includes the following steps: (21) Mix soy protein isolate and deionized water, stir magnetically for 2 h, disperse ultrasonically for 10 - 30 min, freeze, and dry to obtain protein blocks; (22) Add corn starch to deionized water, heat and stir at 70 - 85 °C for 30 s, and dry at 110 °C to obtain pretreated starch; (23) Take the protein blocks and add them to deionized water, stir to obtain a suspension, take the pretreated starch and add it to the suspension, heat at 90 - 95 °C for 2 - 4 min, freeze-dry, crush, sieve, and dry to obtain modified starch; (24) Take the modified starch and dissolve it in deionized water, heat it in a water bath at 35 - 40 °C, dropwise add octenyl succinic anhydride while stirring, and dropwise add an alkali solution to control the pH of the reaction system to 8.4 - 8.6 while dropping octenyl succinic anhydride, react for 4 h, after the reaction ends, adjust the pH of the system to neutral with an acid solution, separate, take the organic phase, wash with water, wash with alcohol, and dry to obtain a preform; (25) Crush and grind black rice bran, add it to ethanol, take the preform and add it to the ethanol, mix ultrasonically for 25 - 30 min, dry at 80 - 85 °C, and grind to obtain the powder.

2. A process for stably filling voids in porous particles according to claim 1, characterized in that: In step (1), the grease is at least one of chicken oil, soybean oil, and fish oil.

3. The process for stably filling voids in porous particles according to claim 1, characterized in that: The mass ratio of the perforated particles, the grease in the first spraying, the powder in the second spraying, the grease in the second spraying, and the powder for the third spraying and the fourth spraying is 1000:120 - 180:50 - 80:200:100 - 200.

4. A process for stabilizing the voids in the perforated particles of the filling strip according to claim 1, characterized in that, The vacuum degree of the first spraying is 650 - 750 mbar.

5. A process for stably filling voids in perforated particles according to claim 1, characterized in that, The vacuum degree of the second spraying is 850 - 950 mbar.

6. A process for stably filling voids in perforated particles according to claim 1, characterized in that, In step (21), the dosage ratio of the soy protein isolate and deionized water is 5 - 10 g:80 - 100 mL.

7. A process for stably filling voids in perforated particles according to claim 1, characterized in that, In step (22), the dosage ratio of the corn starch and deionized water is 10 - 20 g:100 mL.

8. A process for stabilizing the voids in perforated particles of a filled belt, characterized in that, In step (23), the dosage ratio of the protein blocks, deionized water, and pretreated starch is 5 - 10 g:200 mL:50 - 80 g.

9. The process for stably filling voids in porous particles according to claim 1, characterized in that: In step (24), the mass ratio of the modified starch, deionized water, and octenyl succinic anhydride is 10 - 12: 100 - 150: 4 - 6; in step (25), the dosage ratio of the black rice bran, ethanol, and preform is 8 - 12 g: 50 - 100 mL: 30 - 50 g.