KR20080081126A - Method for preparing egg adhered nano-silver particle to eggshell - Google Patents

Abstract

A preparation method of an egg with silver nano particles adhered to its eggshell is provided to uniformly coat the eggshell with the silver nano particles by using the expansion/contraction of egg due to heat. An egg with silver nano particles adhered to its eggshell is prepared by: coating the surface of an eggshell with silver nano water, and then drying it to adhere silver nano particles to the eggshell. The adhesion method of silver nano particles comprises the deep-coating step of: soaking an egg in silver nano water, and then drying. The deep-coating step comprises: soaking an egg heated to 40~60°C in the silver nano water(cooled to 10°C) for 20~60sec, while supplying air bubbles to the silver nano water; taking out the egg, and naturally dropping the silver nano water; drying the surface of the eggshell for its water content to reach 10% or less by a dryer at 45°C; and repeating the drying process 1~3times. The adhesion method further comprises the step of: spraying silver nano water on the surface of the eggshell with adhered silver nano particles, and then drying.

Description

METHOD FOR PREPARING EGG ADHERED NANO-SILVER PARTICLE TO EGGSHELL}

The present invention relates to a method for producing an egg in which silver nanoparticles are adsorbed on an egg shell, and more specifically, silver nano water is applied to an egg shell surface of an egg and dried to adsorb the silver nanoparticles to an egg egg shell to expect an antiseptic and antimicrobial effect of the egg. The present invention relates to a method for preparing eggs in which silver nanoparticles, which can not only extend the shelf life and shelf life, can be adsorbed on egg shells.

Currently, domestic consumption of domestic eggs is about 30 million, of which less than 50% of sanitized eggs are washed and sterilized. The most widely used method of sanitizing eggs is washing by washing water, UV sterilization method, pasteurization method, irradiation sterilization method, etc. Is not enough.

When eggs are spawned from their mothers, a unique antimicrobial cuticle film is formed on the eggshell surface to prevent pathogenic bacteria from penetrating into the egg.However, the cuticle membrane is easily dissolved during washing and sterilization, resulting in pathogenic bacterial infection. Are vulnerable, which can be a threat to the quality and stability of eggs.

In order to compensate for this problem, currently, mineral oil or edible oil is applied or coated on the eggshell surface. However, there is a shortage of antimicrobial treatment method for pathogenic bacteria. There is a need to do so.

The present invention was conceived by recognizing the above point, the object of the present invention is to uniformly and densely adsorb silver nanoparticles on the egg shell surface and the pores of egg shell, thereby preventing the infection of eggs by pathogenic bacteria during the storage period. It is to help reduce.

Particularly, an object of the present invention is to make the adsorption process under the optimum adsorption condition using the adsorption characteristics of the silver nano and the function of the egg to expand and contract according to the heat in the process of adsorbing the silver nanoparticles to the egg shell. It is to ensure that the adsorption of the silver nanoparticles is made well.

In order to achieve the above object, a method of preparing an egg in which silver nanoparticles are adsorbed on an egg shell is achieved by applying silver nano water to an egg shell surface of the egg and drying the silver nanoparticles on an egg shell.

In addition, the method for producing an egg in which silver nanoparticles are adsorbed on an egg shell is characterized in that the adsorption of silver nanoparticles comprises a dip coating step of dipping and drying the egg in silver nano water.

In addition, the method of manufacturing an egg in which silver nanoparticles are adsorbed on an egg shell according to the present invention, the dip coating step, the egg is heated to 40 ℃ to 60 ℃ while supplying bubbles to the silver nano water cooled to about 10 ℃ temperature After soaking for 20 to 60 seconds, the egg is taken out and the silver nano water is naturally fallen. Then, the process of drying the eggshell surface with a heat dryer at 45 ° C. for 10% or less is repeated 1 to 3 times. It is done.

In addition, the manufacturing method of the egg is nano-particles adsorbed to the egg shell according to the present invention, characterized in that it further comprises a spray coating step of spraying the silver nano-water sprayed on the surface of the egg egg is adsorbed silver nano particles in the dip coating step It is done.

In addition, in the method of manufacturing an egg in which silver nanoparticles are adsorbed on an egg shell according to the present invention, in the spray coating step, spraying silver nano water having a temperature cooled to 10 ° C. uniformly sprays one to three times on the egg shell surface of the egg. After that, the egg eggshell surface is dried by the heat of the egg itself, and the egg is quenched to a temperature of 5 ° C., and the moisture content of the eggshell surface is characterized in that it is dried to about 8-10%.

In addition, the manufacturing method of the egg in which the silver nanoparticles are adsorbed on the egg shell, according to the present invention, is characterized in that the adsorption of the silver nanoparticles comprises a spray coating step of spraying and drying the silver nano water on the surface of the egg eggshell.

In addition, in the method of manufacturing an egg in which silver nanoparticles are adsorbed on an egg shell according to the present invention, in the spray coating step, spraying silver nano water having a temperature cooled to 10 ° C. uniformly sprays one to three times on the egg shell surface of the egg. After that, the egg eggshell surface is dried by the heat of the egg itself, and the egg is quenched to a temperature of 5 ° C., and the moisture content of the eggshell surface is characterized in that it is dried to about 8-10%.

According to the above configuration, the manufacturing method of the egg in which the nanoparticles of the present invention are adsorbed on the eggshell is made by adsorbing the silver nanoparticles between the eggshell surface of the egg shell and the pores of the eggshell. It improves the safety as food and improves the quality of preservation hygiene to improve the profitability by the quality improvement, and further has the effect that can provide a hygienic egg relatively harmless to consumers through the hygiene of the egg through the above method.

In the present invention, self-adsorbing force is generated when silver (nano) that is capable of sterilizing about 650 kinds of bacteria (microorganisms) without resistance is formed into nano (NaNo) size, and the surface area becomes wide due to the charging phenomenon between particles. The antimicrobial efficiency is maximized to improve the preservation and hygiene of eggs.

According to the present invention, an egg is placed in colloidal silver (silver nano water: colloidal silver) in which 99.99% purity silver is made into nanoparticles (ultrafine particles) using high voltage and dispersed and suspended in colloidal state in distilled or purified water. Through the dip coating process of dipping and heat drying, the silver nanoparticles can seep into the pores formed on the eggshell surface as well as the eggshell surface of the egg so that the silver nanoparticles can be adsorbed. By vibrating the inside of the tank in a conventional manner and by supplying a large amount of bubbles to enable uniform adsorption.

In addition, the present invention in the spray coating (spray coating) process to spray the silver nano water at a predetermined temperature and concentration close to the egg shell surface of the egg installed in the egg bed or the packaging container, the silver nano water in contact with the egg shell surface of the egg By causing latent heat to evaporate naturally or to dry naturally in the process of quenching the eggs, the silver nanoparticles are firmly adsorbed on the eggshell surface. It is to reduce the infection.

There are many kinds of silver nano water (or silver ion water) used for the means for adsorbing silver nano particles to the surface and pore of egg eggshell of the present invention, but strictly speaking, the purity of silver nano water is 99.99% pure. Silver (Ag) is obtained through electrolysis, that is, it is decomposed into nano (NaNo) particles through the process of generating negative or positive ions and dispersed in colloidal state in mineral distilled or purified water. Suspended colorless, tasteless, and odorless solution refers to a pure substance in which fine silver nanoparticles are suspended in distilled water by the strong electrical load of each particle.

Silver nanoparticles have a Brownian motion in which silver nanoparticles collide with water molecules or other molecules and move around irregularly. This movement is made at high voltage and becomes more intense with higher charge and smaller particles. The reason why the silver nanoparticles are stably maintained is because the silver nanoparticles are charged with each other and carry the same kind of electricity, and thus repel each other.

Hereinafter, with reference to the drawings and examples will be described in detail the manufacturing method of the egg nano silver particles adsorbed on the eggshell.

Figure 1 is a cross-sectional view of a typical shell egg sold on the market, Figure 2 is a schematic diagram showing the adsorption of silver nanoparticles on the egg shell surface and egg shell pores by the present invention, Figure 3 is a present invention is applied 4 is a flow chart showing the procedure of the manufacturing process, Figure 4 (a) and (b) is a diagram showing a change in the eggshell surface before and after the present invention is applied.

The present invention consists of a dip coating step and / or a spray coating step for coating silver nanoparticles on eggshells. Hereinafter, the present invention will be mainly described with reference to an embodiment in which the spray coating step is performed through a dip coating step.

Example 1 Deep Coating Step

The colloidal silver (hereinafter referred to as "silver nano water") in which silver nanoparticles decomposed to a size of 50 nm or less by high voltage and dispersed in a concentration ranging from 10 to 100 ppm is cooled to about 10 ° C. Eggs heated in the normal washing process by vibrating the silver nano water inside the tank filled with the appropriate amount of silver nano water to supply waves or supplying a large amount of bubbles into the silver nano water (Washing of eggs gradually increases the temperature of the washing water. Eggs, which have been subjected to a conventional washing process, are heated to a temperature of about 40 ° C. to 60 ° C.), and soaked in the water tank for 20 to 60 seconds.

The immersed egg is dried as described above, and the silver nano water flowing through the eggshell surface of the egg from the upper part of the tank is naturally dripping and dried, and the eggplant surface is heat-dried so that the moisture content is 10% or less with a heat dryer of about 45 ° C.

Repeat the dip coating process about 1 to 3 times.

Example 2: Spray Coating Step

After the deep coating step, the egg is placed in a storage stool or a packing container, and after spraying silver nano water cooled to about 10 ° C. uniformly and densely on the egg shell surface of the egg 1 to 3 times, In the latent heat of the egg itself (as described above, the heated egg during washing does not cool all, but contains a predetermined heat or more) in the process of quenching the egg to a temperature of about 5 ℃ The eggshell surface is naturally evaporated to have a water content of 8 to 10%.

The silver nanoparticles are adsorbed in a predetermined shape on the egg shell surface and the egg shell pores of the completed egg through the deep coating step and the spray coating step as described above.

According to the present invention, silver nano (colloidal silver) in which silver nano particles (NoNo silver) are dispersed in a colloidal state (colloidal silver) is used as a mediator of an intended adsorption means, and the silver nano in colloidal state. Not only can the silver nanoparticles 23 be uniformly adsorbed on the eggshell surface 21 of the egg according to the charging phenomenon of the particles, but the size of the particles is fine enough to easily pass through the pores 22. It is also possible that the particles are adsorbed in the pores, and because the silver nano water (Ag ⁺ ) is excellent in the self-adhesion power is not necessary in the process of adsorbing the particles to the egg shell, there is no need for an additional adhesive component.

   Representative bacteria that are deposited and infested in eggshell 11 during egg preservation period are Salmonella enteritidis (SE), a pathogenic food poisoning bacterium. The eggs are infiltrated into the egg white (13) and the egg yolk (14) through the eggshell surface and pores (22) from the medium around the egg shell or after spawning. Infection can occur due to recurring use of unbalanced bases, conservation facilities or environmental hazards.

The egg forms about 7,000 to 15,000 pores (pores) on the eggshell surface 21 for its own breathing activity. It is concentrated in the buttocks of the egg, and the pores are large enough to allow pathogenic bacteria to pass through. It becomes an infection.

However, in the present invention, by adsorbing the silver nanoparticles 23 to the egg shell surface and the pore portion of the egg shell at a dense density, pathogenic bacteria deposited and penetrated into the egg shell surface 21 and the pores 22 during the storage period may be contacted and sterilized. It is characterized by that it was possible to.

That is, the present invention is a silver nano-assisted method in a series of processes to allow the nano-particles having self-adsorption power to be adsorbed deeply in the egg shell surface and pores in the process of deep coating the egg in a predetermined silver nano water (colloidal silver) By vibrating the inside of the tank filled with water, supplying a large amount of bubbles to ensure uniform adsorption, and spraying a predetermined silver nano water on the egg shell surface of the egg to form a predetermined silver nano layer on the egg surface The hygienic condition of eggshell surface could be improved.

In the present invention, silver nanoparticles (colloidal silver) in which silver nanoparticles decomposed to a size of 50 nm (nanometer) or less by high voltage are dispersed and suspended in a colloidal state at a concentration ranging from 10 to 100 ppm.

First, the configuration of the dip coating step 31 of FIG. 3 will be described in more detail. The eggs are washed while raising the temperature of the washing water by a conventional washing method, and the heated eggs are vibrated in an auxiliary method in a tank filled with a suitable amount of silver nano water cooled to about 10 ° C. while supplying a large amount of bubbles. Soak for about 60 seconds, allow the silver nano water to come into contact with the surface of the eggshell 11, infiltrate between the pores 22, and then remove the egg to naturally drain the silver nano water flowing through the surface of the egg at the top of the tank to dry it. After that, the eggs are heat-dried for about 5 minutes with a heat dryer, which is a heat condition of about 45 ℃. The dip coating step is configured by repeating the same immersion and drying process 1 to 3 times.

In the conventional washing process, the washing water of 11 ° C. or higher, that is, 44 ° C. or higher, is sprayed on the eggshell 11 under high pressure, and the washing water is sequentially heated up to 60 ° C. as the washing process proceeds. The washing is done while raising, to prevent the wash water from flowing back into the egg.

Therefore, the egg that has undergone such a washing process has a temperature of approximately 50 ° C., and the material inside the egg is also expanded.

According to the present invention, the expanded egg is brought into contact with a predetermined time through a process of immersing the expanded egg in cooling silver nano water of 10 ° C. or less to induce a material inside the egg to contract, and pores of the egg eggshell during the shrinking process (22). ), The silver nano water is soaked in, and the adsorption is possible.

During the immersion process, silver nanoparticles are adsorbed by a more uniform density on the eggshell surface 21 of the egg which is subjected to the immersion process by applying vibration to the inside of the tank in an auxiliary manner and supplying a large amount of bubbles. To help. In addition, the immersion time may vary depending on the concentration of silver nano water to be an adsorbent, but preferably, the time required for one immersion is within 60 seconds.

On the other hand, the present invention is intended to adsorb predetermined silver nanoparticles to the egg shell portion of the egg, but according to the manufacturer's intention to use the present invention particles having a size of less than 10nm among the nanoparticles contained in the silver nano water Since the egg penetrates the egg shell membrane 12 and penetrates into the egg, in order to obtain an egg product in which silver nanoparticles are artificially mixed inside the egg, the soaking time is maintained for 1 hour or more during the dipping process. It can be mixed.

 In this step, the egg is immersed in silver nano water and naturally dripping to remove the silver nano water contacted with the egg, and to process the drying process with a heat dryer more efficiently, the silver nano water is composed of a wire mesh that can pass easily Prepare a box of a predetermined size, install a plurality of washed eggs in an upright form so as not to overlap each other inside the box of the wire mesh, and then the wire mesh box to be immersed in the tank by the tub After that, hang the wire mesh box that has been immersed through the fixed hook on the upper part so that the silver nano water falling from the egg may fall into the tank, and fix the wire box after the falling process to the upper part where the heat dryer is prepared, and then perform the drying process. . By installing a plurality of eggs in the mesh box as described above it will be effective in the work efficiency by going through the process.

In the step of drying the egg, which has been immersed in the above step by a heat dryer, it is more preferable to dry the eggs so that the direction of the hot air generated in the heat dryer is directed upward from the bottom of the mesh box installed in the upright form. . In addition, the temperature of the arrival point at which the heat generated from the warmer arrives at the eggshell surface 11 of the egg should not exceed 45 ° C. The reason for this is that when the eggshell surface 11 is dried by heat of temperature higher than 45 ° C, the egg This is because the inner egg white 13 may show a whitening phenomenon.

In the dip coating step, the immersion process and the heat drying process are repeated one to three times, and the dip coating is finished in one process according to the concentration of silver nano water used by the intention of the person preparing the egg. The process may be repeated three or more times, depending on the level of adsorption desired.

Table 1 below shows the silver nano water (colloidal silver) used in the present invention in concentrations of 10ppm, 30ppm and 50ppm, and sterilization by time according to the concentration against Salmonella (SE) bacteria, a representative pathogenic bacterium infected with eggs during the storage period. This is a test table.

(time) 10 minutes 20 minutes 30 minutes 60 minutes 90 minutes 10 (PPM) 40% 55% 75% 90% 100% 30 (PPM) 50% 70% 80% 95% 100% 50 (PPM) 65% 80% 95% 99% 100%

     Hereinafter, a spray coating step included in the process of the present invention will be described.

 Through the implementation of the deep coating step (31 in FIG. 3), the silver nanoparticles 23 may be absorbed into the pores 22 of the eggshell 11 so that the silver nanoparticles 23 may be adsorbed. The level of adsorption of silver nanoparticles on the eggshell surface may not be met. Therefore, in the spray coating step, the silver nanoparticles are uniformly adsorbed on the eggshell surface so that the intended adsorption level can be satisfied.

     Spray coating step (32 of Figure 3) configuration of the present invention, after the heat-drying process in the deep coating step (31 of FIG. 3) is installed in the egg bed or packing container in an upright form with an obtuse upwards, 10 After cooling to a temperature below and spraying silver nano water having an intended predetermined concentration to the egg shell 11 surface of the egg installed on the egg bed 1 to 3 times, the egg is heated in a thermal drying process. By the latent heat formed inside the egg, the moisture of the silver nano water is evaporated, so that the eggshell surface is basically dried, and the process of evaporating and drying in the process of rapidly cooling the temperature inside the egg to about 5 degrees.

     In the present invention will be described in detail the spray coating step (32 of Figure 3) configured as described above according to the embodiment,

 It is desirable to allow the eggs having the desired drying level to enter the spray coating step (32 in FIG. 3) in a shorter time through the thermal drying process, which is the last process of the dip coating step (31 in FIG. 3).

     The temperature of the eggshell 11 surface of the egg after the heat drying process is close to about 43, the temperature inside the egg also reaches about 40 ~ 41. Therefore, the present invention uses the heat generated by the temperature of 40 or more formed inside the egg as a latent heat to evaporate the moisture of the silver nano water in contact with the egg shell surface, the silver nano water (colloidal silver) cooled to less than 10 the egg By contacting the eggshell surface by spraying through a fine nozzle, the silver nanoparticles remain on the eggshell surface for adsorption due to the phenomenon that the water of the silver nano water contacting the eggshell surface is naturally evaporated by the latent heat. Will be.

    If the level of adsorption of silver nanoparticles on the eggshell surface in the deep coating step is not met, the concentration of silver nano water can be used in the spray coating step according to the manufacturer's intention, or the spraying frequency can be increased in the same process. By carrying out the process, it is possible to produce sanitary eggs that meet the adsorption level according to the manufacturer's intention to produce sanitary eggs.

      In the spray coating process, in the process of spray spraying after the egg is installed in a storage seat or packaging container, since the pores (pores) of the egg eggshell 11 are formed in the obtuse part of 80% or more, When installing in the base or packing container, it is preferable to install in an upright shape with the obtuse part facing upward, and before spraying the silver nano water on the bottom of the egg and the bottom of the container, The silver nano water may be installed in a container and sprayed on top of the installed egg according to the manufacturer's intention.

      In the process of cooling the egg, the internal temperature of the egg rises to 40 or more during the washing process and the deep coating process. The shorter the process time until coating, the better.

 In the spray coating step, the eggs with the adsorption level are cooled to about 5 degrees inside, but within 30 minutes after the cooling process starts, the temperature inside the quenching chamber is quenched below 5 so that the temperature inside the eggs drops below 25. This should be done to minimize the deterioration of egg quality.

      In the process of packing the eggs refrigerated in the Nanjing into a packaging container intended by the manufacturer for the shipment, the eggs are placed in the packaging container and then sprayed with silver nano water to the inside of the packaging container to complete the packaging. The effect of supplying it to consumers in a more hygienic state can also be expected.

      In preparing a sanitary egg according to an embodiment of the present invention, and performing visual observation, first, the process of the dip coating step was repeated three times using silver nano water having a concentration of 50 PPM and cooled to 10 degrees. During the spray coating process, spray spraying is performed three times using silver nano water, which has a concentration of 100 PPM and reaches a temperature of 10, and then cools the eggs to about 5 and then in a refrigerating chamber for 10 hours for about 48 hours. After storage, visual observation was performed.

 The eggs used in the above-described process were carried out on 100 brown eggs of the ISA Brown variety, and the typical features found in the visual observation after the execution were as shown in FIGS. 4 (a) and (b). The egg eggshell surface color was changed to dark brown direction. When the egg egg color was dark brown, the color change was not large, but the closer the egg color was to light brown, It was observed that the degree of change was large.

      Through the observation as described above, it was confirmed that the silver nanoparticles can be adsorbed on the eggshell surface and pores by the method of the present invention.

      Silver nano water (colloidal silver) used in the present invention can be supplied in 1,000ppm, 3,000ppm, 5,000ppm units when supplied from a supplier that specializes in production, in this case can be diluted to the user intended concentration In the dilution process, it is preferable to use dilution water (distilled water, purified water) close to the mineral state.

      The method of the present invention as described above is applicable to a method for sanitizing duck eggs, quail eggs, etc. of poultry with eggshell.

      The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawing.

1 is a cross-sectional view of a typical shell egg sold on the market

Figure 2 is a schematic diagram showing the appearance of silver nanoparticles adsorbed on the egg shell surface and egg shell pores according to the present invention

Figure 3 is a flow chart showing the sequence of manufacturing process to which the present invention is applied

Figure 4 (a) and (b) is a view showing a change in the eggshell surface before and after the present invention is applied

<Short description of the major reference symbols>

11: eggshell 12: eggshell

13: Egg white 14: Egg yolk

21: eggshell surface 22: pores

23: silver nanoparticles 31: dip coating step

32: spray coating step

Claims (7)

A method of producing an egg in which silver nanoparticles are adsorbed on an eggshell, wherein the silver nanoparticles are applied to an eggshell and dried, thereby adsorbing the silver nanoparticles to the eggshell. The method of claim 1, Adsorption of silver nanoparticles is a method of producing an egg in which silver nanoparticles are adsorbed on an eggshell, comprising a dip coating step of dipping and drying the egg in silver nano water. The method of claim 2, In the dip coating step, while supplying air bubbles to the cooled silver nano water at a temperature of about 10 ° C., the eggs heated to 40 ° C. to 60 ° C. are immersed for about 20 to 60 seconds, and then the eggs are taken out to naturally drain the silver nano water. After the process of drying the egg nanoparticles adsorbed on egg shells, characterized in that the drying process so that the moisture content of the eggshell surface is less than 10% with a 45 ° C. heat dryer. The method according to claim 2 or 3, And a spray coating step of spraying silver nano water on the surface of the egg egg shell to which the silver nano particles are adsorbed in the dip coating step to dry the silver nano particles. The method of claim 4, wherein In the spray coating step, the silver nano water cooled to 10 ° C. is uniformly sprayed on the egg shell surface one to three times, and then the egg egg surface is dried by the heat of the egg and then the egg is dried. A method of producing an egg in which silver nanoparticles are adsorbed on an eggshell, which is rapidly cooled to a temperature of ℃, and dried so that the moisture content of the eggshell surface is about 8-10%. The method of claim 1, The adsorption of the silver nanoparticles, the method of producing an egg is silver nanoparticles adsorbed on the egg shell, characterized in that it comprises a spray coating step of spraying the silver nano water on the surface of the egg eggshell to dry. The method of claim 6, In the spray coating step, the silver nano water cooled to 10 ° C. is uniformly sprayed on the egg shell surface one to three times, and then the egg egg surface is dried by the heat of the egg and then the egg is dried. A method of producing an egg in which silver nanoparticles are adsorbed on an eggshell, which is rapidly cooled to a temperature of ℃, and dried so that the moisture content of the eggshell surface is about 8 to 10%.

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