Emulsion fluid filter capable of controlling light wavelength absorption and its manufacturing method

Abstract

The present invention discloses an emulsion spectrum fluid filter capable of controlling light wavelength absorption, comprising a transparent channel formed in a '⊃' shaped tube and an emulsion contained in the transparent channel, the emulsion including dispersed surfactants and oils, and a method for manufacturing the same.

Description

[Technical field]

[0001] The present invention relates to an emulsion spectral fluid filter capable of controlling the absorption of light wavelengths and a method for manufacturing the same.

[0002] This invention was derived from research conducted as part of the Ministry of Science, ICT and Technology's Collective Research Support (R&D) (Project ID: 1711119436, Research Management Agency: Korea Research Foundation, Research Project Name: Plus Energy Building Innovative Technology Research Center, Sponsoring Agency: Korea University Industry-Academia Collaboration Group, Research Period: 2020.07.01~2021.05.31, Contribution Rate: 1 / 1). However, no aspect of this invention has any proprietary interest in the Korean government. [Background technology]

[0003] Solar power generation utilizes the photoelectric effect to generate electricity through semiconductors when a light source is provided. Solar panels are made up of solar cells, which are classified into silicon semiconductors and compound semiconductors depending on the materials they are made of.

[0004] Currently, most products on the solar market are solar cells made of silicon, among which monocrystalline silicon solar cells are the most common. Solar cells do not use all wavelengths of sunlight, and although there are slight differences depending on the material, monocrystalline silicon solar cells generate electricity using wavelengths between 730nm and 1130nm. Here, wavelengths other than 730nm to 1130nm are not involved in electricity production, but instead serve to raise the temperature of the entire solar panel made up of solar cells, and there is a problem in that the photoelectric efficiency of the solar panel decreases as the temperature increases. For example, if the temperature of the solar panel increases by 1℃, the photoelectric efficiency can decrease by about 0.5%. Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide an emulsion spectrum fluid filter capable of controlling light wavelength absorption, which is composed of oil and a surfactant, is chemically stable and has a low risk of precipitation and corrosion, is a mixture of oil that effectively absorbs short wavelengths and water that effectively absorbs long wavelengths, and has excellent absorption properties except for wavelengths that are effective for photoelectric effect, and has no significant difference in thermal conductivity compared to water because the oil is dispersed in fine particles and added at a low concentration, and can be applied to a flow path form where a light wavelength filter is needed not only for solar power generation but also for use by freely injecting / discharging emulsion as needed, and a manufacturing method thereof.

[0006] Meanwhile, the technical problems to be achieved by the present invention are not limited to those mentioned above, and other technical problems not mentioned should be clearly understood by those having ordinary skill in the art to which the present invention pertains from the description below. [Means for solving the problem]

[0007] An emulsion spectrum emulsion filter capable of controlling light wavelength absorption according to an embodiment of the present invention includes a transparent channel formed in a '⊃' shaped tube, and an emulsion contained in the transparent channel, and the emulsion may include dispersed surfactants and oils.

[0008] In addition, the transparent channel may include an inner wall having a cross section shaped like a letter '⊃' and an outer wall located outside the inner wall and having a cross section shaped like a letter '⊃'. The transparent channel may have an inlet and an outlet formed at one end and a curved portion formed at the other end.

[0009] The transparent channel may include a first region through which the emulsion is transported from the inlet to the curved portion, and a second region located above the first region through which the emulsion is transported from the curved portion to the outlet.

[0010] Also, a solar cell may be fixed to an upper surface of the inner wall in the first region.

[0011] In addition, the emulsion in the first region can absorb heat from the solar cell, and in the second region, the emulsion can absorb light having a wavelength of 730 nm or less and 1130 nm or more that is incident on the solar cell side.

[0012] The oil may also include at least one of silicone oil, corn oil, mineral oil (white oil), lubricant, and soybean oil.

[0013] Also, the oil may be mixed in the emulsion at 0.05 wt % or less.

[0014] Also, the surfactant is a mixture of a low HLB surfactant and a high HLB surfactant, and examples of the surfactant include oleic acid, sorbitan trioleate, sorbitan monooleate, (sorbitan monostearate), sorbitan monolaurate, polyoxyethylene 5 sorbitan monooleate, triethanolamine oleate, polyoxyethylene 20 sorbitan monostearate, polyoxyethylene 20 sorbitan monooleate, polyoxyethylene 20 sorbitan monolaurate, sodium oleate, and potassium oleate. oleate (potassium oleate).

[0015] The mixing ratio of the oil to the surfactant may range from 2:1 to 8:1.

[0016] In addition, a method for manufacturing an emulsion capable of controlling light wavelength absorption according to an embodiment of the present invention may include a step of mixing a low HLB surfactant and a high HLB surfactant to generate a surfactant mixed fluid, a step of mixing the surfactant mixed fluid with oil to generate a mixed fluid, and a step of mixing water with the mixed fluid.

[0017] Also, after the step of mixing with water, a step of ultrasonic grinding may be further included.

[0018] The oil may also include at least one of silicone oil, corn oil, mineral oil (white oil), lubricant, and soybean oil.

[0019] In the step of mixing the oil to generate the mixed fluid, the oil may be mixed into the emulsion in an amount of 0.05 wt % or less.

[0020] In the step of producing the surfactant mixed fluid, the surfactant mixed fluid may be prepared by mixing the surfactant mixed fluid with oleic acid, sorbitan trioleate, sorbitan monooleate, (sorbitan monostearate), sorbitan monolaurate, polyoxyethylene 5 sorbitan monooleate, triethanolamine oleate, polyoxyethylene 20 sorbitan monostearate, polyoxyethylene 20 sorbitan monooleate, polyoxyethylene 20 sorbitan monolaurate, sodium oleate, and potassium oleate. oleate (potassium oleate).

[0021] In the step of mixing the oil to generate the mixed fluid, a mixing ratio of the oil to the surfactant may range from 2:1 to 8:1. Effect of the Invention

[0022] According to an embodiment of the present invention, the composition is made of oil and a surfactant, which is chemically stable and has a low risk of precipitation and corrosion. Since the composition is a mixture of oil that effectively absorbs short wavelengths and water that effectively absorbs long wavelengths, it has excellent absorption characteristics except for wavelengths that are effective for the photoelectric effect, and it is possible to improve the photoelectric efficiency.

[0023] In addition, according to an embodiment of the present invention, the oil is dispersed in the form of fine particles and added at a low concentration, so there is no significant difference in thermal conductivity compared to water. Therefore, it can be applied to a flow path form where a light wavelength filter is required as well as solar power generation, and can be used by freely injecting / discharging the emulsion as needed.

[0024] On the other hand, the effects that can be obtained by the present invention are not limited to those mentioned above, and other effects not mentioned should be clearly understood by those having ordinary skill in the art to which the present invention belongs from the description below. [Brief description of the drawings]

[0025] [Figure 1] 1 is a cross-sectional view illustrating a schematic state in which an emulsion spectrum emulsion filter capable of controlling light wavelength absorption according to an embodiment of the present invention is applied; [Diagram 2] 1 is a graph showing power density for each wavelength of sunlight. [Diagram 3] 1 is a flow diagram illustrating a method for producing an emulsion according to one embodiment of the present invention. [Figure 4] 1 is a graph showing characteristics of an emulsion according to one embodiment of the present invention. [Diagram 5] 1 is a graph showing characteristics of an emulsion according to one embodiment of the present invention. [Figure 6] 1 is a graph showing characteristics of an emulsion according to one embodiment of the present invention. [Figure 7] 1 is a graph showing the characteristics of an emulsion according to a comparative example. [Figure 8] 1 is a graph showing the characteristics of an emulsion according to a comparative example. [Figure 9] 4 is a graph showing a comparison of the characteristics of an emulsion according to a fluid filter according to an embodiment of the present invention and a comparative example. [Figure 10] 4 is a graph showing a comparison of the characteristics of an emulsion according to a fluid filter according to an embodiment of the present invention and a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, the embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. The present embodiments are provided to more completely explain the present invention to those having average knowledge in the art. Therefore, the shapes of elements in the drawings are exaggerated to emphasize a clearer description.

[0027] In order to clarify the solution to the problem that the present invention is to solve, the configuration of the present invention will be described in detail based on a preferred embodiment of the present invention with reference to the accompanying drawings. In assigning reference numbers to components in the drawings, the same reference numbers will be assigned to identical components even if they appear in different drawings, and it will be made clear in advance that when describing the drawings, components in other drawings may be referenced if necessary.

[0028] FIG. 1 is a cross-sectional view illustrating a schematic state in which an emulsion spectrum emulsion filter capable of controlling light wavelength absorption according to an embodiment of the present invention is applied.

[0029] Referring to FIG. 1, an emulsion spectrum emulsion filter capable of controlling light wavelength absorption according to an embodiment of the present invention may be constructed by injecting an emulsion into a transparent channel having a cross section formed in a '⊃' shaped tube.

[0030] The transparent channel may be composed of an inner wall having a cross section in the shape of a letter '⊃', an outer wall located outside the inner wall and having a cross section in the shape of a letter '⊃', and a connecting side wall (not shown) connecting the inner wall and the outer wall. Here, the transparent channel is preferably composed of a material having excellent transmittance and excellent thermal conductivity, but the present invention is not limited thereto.

[0031] The transparent channel may have an inlet and an outlet on one side and a curved portion on the other side opposite to the one side, so that the cross section may be formed in a '⊃' shape. Here, a pump (not shown) may be connected to at least one of the inlet and outlet to pump the emulsion and generate a forced flow.

[0032] That is, the emulsion flowing in through the inlet of the transparent channel can be discharged through the outlet in a state where the flow direction is reversed through the bent portion.

[0033] Specifically, the transparent channel includes a first region where the emulsion is transported to one side from the inlet to the curved portion, and a second region located above the first region where the emulsion is transported to the other side from the curved portion to the outlet.

[0034] Here, the upward direction can be defined as the direction in which light enters.

[0035] Meanwhile, although not shown, the transparent channel is formed in a closed structure, and a cooling unit (not shown) and a pump (not shown) are formed on one side to forcibly transport the cooled emulsion to the curved portion side, and then the emulsion that has passed through the curved portion can be circulated within the transparent channel.

[0036] In the first region, a solar cell can be disposed on the outer surface of the inner wall (the upper surface in FIG. 1).

[0037] Meanwhile, the first region may include a fixing portion (not shown) on an upper surface of an inner wall thereof to which the solar cell is coupled and fixed.

[0038] Here, the outer surface of the inner wall can be defined as the surface facing the central axis of the transparent channel.

[0039] The emulsion injected through the inlet may have a lower temperature than the solar cell, and the emulsion may cool the solar cell through thermal conduction in the first region.

[0040] The emulsion that absorbs heat from the solar cell in the first region can flow into the second region through the curved part, where it can absorb light in the wavelength range (less than 730nm, more than 1130nm) excluding the effective wavelength (730nm to 1130nm) of sunlight.

[0041] Figure 2 is a graph showing the power density of sunlight by wavelength.

[0042] 2, the effective wavelength can be defined as a wavelength effective for the photoelectric effect, and for example, in the present invention, in the case of a single crystal silicon solar cell, it can be defined as a wavelength band of 730 nm to 1130 nm that produces electricity. Meanwhile, in the case of wavelengths other than the effective wavelength of 730 nm to 1130 nm, they are not involved in the production of electricity, but can increase the temperature of the entire solar panel composed of solar cells.

[0043] That is, the emulsion present in the second region absorbs light in the wavelength band (less than 730 nm and more than 1130 nm) that affects the temperature rise of the solar cell, thereby suppressing the temperature rise while maintaining the photoelectric efficiency of the solar cell.

[0044] The emulsion may be in the form of a mixture containing a water-based oil and a surfactant.

[0045] FIG. 3 is a flow chart illustrating a method for producing an emulsion according to one embodiment of the present invention.

[0046] Referring to FIG. 3, in a method for preparing an emulsion according to an embodiment of the present invention, first, a low HLB surfactant and a high HLB surfactant are mixed based on the HLB value of an oil.

[0047] Here, since the HLB value of common oils is between 6 and 12, the HLB value of low HLB surfactants is defined as between 0 and 6, and the HLB value of high HLB surfactants is defined as between 12 and 18.

[0048] The surfactants, in order of decreasing HLB value, are Oleic acid, Sorbitan trioleate, Sorbitan monooleate, Sorbitan monostearate, Sorbitan monolaurate, Polyoxyethylene 5 sorbitan monooleate, Triethanolamine oleate, Polyoxyethylene 20 sorbitan monostearate, Polyoxyethylene 20 sorbitan monooleate, Polyoxyethylene 20 sorbitan monolaurate, Sodium oleate, Potassium oleate, and Polyoxyethylene sorbitan monolaurate. The additives may include, but are not limited to, potassium oleate.

[0049] Before mixing with oil, the surfactants must be mixed together to produce a surfactant-mixed fluid having an appropriate HLB value, and then the oil is mixed with this fluid.

[0050] Here, the HLB value is determined for each oil. For example, if the HLB value of silicone oil is 11, it is preferable to mix two types of surfactants to create a surfactant with an HLB value of 11. When two surfactants are mixed in this way to create the same HLB value as the oil, the HLB value at this time is considered to be the appropriate HLB value.

[0051] On the other hand, emulsions containing a single surfactant have poor stability, so the use of a composite surfactant can improve the stability of the emulsion. In the case of emulsions, water and oil must be mixed and high stability is required, so it is preferable to use a composite surfactant.

[0052] The oil may include at least one of viscous fluids such as silicone oil, corn oil, mineral oil (white oil), lubricant, and soybean oil.

[0053] Here, the oil is preferably a component that maintains a liquid phase at room temperature. That is, the oil is preferably a vegetable oil. Animal oils exist as a solid at room temperature and are difficult to exist as a liquid phase, making them difficult to use. In addition, among vegetable oils, coconut oil is solid at room temperature and cannot be used.

[0054] At this time, the amount of oil can be added in a mass ratio of 2 to 8 times that of the surfactant mixed fluid, that is, the mixture ratio of the oil and the surfactant mixed fluid can be set in the range of 2:1 to 8:1.

[0055] Here, if the mixing ratio of oil and surfactant mixed fluid is less than 2:1, the amount of unused surfactant increases during the mixing process, which can cause a problem of aggregation between surfactants. If the mixing ratio of oil and surfactant mixed fluid is more than 8:1, the amount of surfactant that disperses the oil during the mixing process can cause a problem of aggregation between the remaining oil.

[0056] The surfactant is added to prevent the oil from separating from the water and to disperse it into droplets.

[0057] The surfactant may be any one or more selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, and cationic surfactants.

[0058] These classifications are made according to the type of hydrophilic group, and anionic surfactants are surfactants in which the long-chain atomic group (hydrophobic part) becomes anion, such as soap, phosphate ester, sulfate, sulfonate, etc., while cationic surfactants are surfactants in which the long chain becomes cationic, such as quaternary ammonium salt, amine salt, pyridine salt, etc. In addition, nonionic surfactants are surfactants that do not have a group that carries an electric charge, such as polyethylene, glycol, polyhydric alcohol, fatty acid ethylene oxide, etc., and cationic surfactants are surfactants that have both cations and anions in the molecule, and are governed by pH, and include amino acid type, betaine type, etc.

[0059] Meanwhile, HLB (Hydrophilic Lipophilic Balance) is a numerical representation of the degree of hydrophilicity and lipophilicity of a surfactant, with HLB starting at 1 for the most lipophilic surfactant, and most commonly used surfactants have an HLB between 1 and 20. Specifically, the HLB value of a surfactant mixture can be obtained by the following [Equation 1].

number

[0060] For example, if silicone oil has an HLB value of 11, then by taking advantage of the fact that surfactant A (Polyoxyethylene 5 lauryl ether) has an HLB value of 10 and surfactant B (Polyoxyethylene 10 cetyl ether) has an HLB value of 12, it is possible to obtain an HLB value of 11, the same as silicone oil, by mixing the two surfactants in a 1:1 ratio.

[0061] In the next step, the mixture of oil and surfactant mixed fluid is mixed with water. At this time, the oil must be uniformly dispersed into fine particles using an ultrasonic mill with stirring, and the ultrasonic mill must be effectively pulverized by running cooling water through the double-jacketed beaker to prevent the temperature of the fluid from increasing during the operation of the ultrasonic mill.

[0062] During the manufacturing process, mechanical stirring, ultrasonic grinding, and magnetic stirring can be used as a method of mixing (stirring) between fluids or between fluids and particles, and when mixing oil / surfactant with water, ultrasonic grinding can be used to maintain the shape of fine particles.

[0063] Here, when the oil is finally added to the water, the oil concentration should be 0.05 mass fraction or less to prevent excessive turbidity caused by the oil remaining in the form of fine particles. [Example]

[0064] An example of emulsion production is shown below. Silicone oil (0.05 g) was selected as the type of oil, and the low HLB surfactant Span 80 (0.00625 g) and the high HLB surfactant Tween 80 (0.00625 g) were selected.

[0065] First, Span 80 (0.00625 g) and Tween 80 (0.00625 g) were stirred in a stirrer at 400 rpm for 30 minutes.

[0066] Thereafter, silicone oil (0.05 g) was added to the stirrer, and the mixture was stirred at 400 rpm for 30 minutes.

[0067] Thereafter, water (99.9375 g) was added to the stirrer, and the mixture was stirred at 400 rpm for 30 minutes, and then stirred at 25° C. for 1 hour using an ultrasonic grinder (20 Hz). [Comparative Example]

[0068] The fluids flowing into the transparent channel were water and nanoemulsion.

[0069] Nanoemulsions are dispersions of solid nanoparticles in water. [Characteristics evaluation]

[0070] 4 shows the light transmittance of each of the oils and water examined for the present invention, and while water exhibits high transmittance at wavelengths of 730 nm or less, all of the oils exhibit low transmittance. In addition, water, which is the base of the emulsion spectrum fluid filter, has the lowest transmittance at wavelengths of 1130 nm or more, which indicates its suitability.

[0071] Figure 5 shows the light transmittance as a function of the concentration of silicone oil, and it can be seen that as the concentration of oil increases, the light transmittance decreases overall at all wavelengths. Referring to Figure 5, it can be seen that 0.05wt% is the limit concentration of oil added.

[0072] Figure 6 shows the thermal stability evaluation results of an emulsion spectrum fluid filter with 0.05wt% silicone oil added. In the case of emulsions, the interaction between the oil and surfactant changes depending on the temperature, which can destroy the dispersion. If exposed to sunlight without the application of cooling technology, the temperature of the solar cell can rise to 80-90°C, so temperature stability at this temperature is important.

[0073] In the case of the present invention, the concentration of the additive was limited to 0.05 wt %, so oil separation due to dispersion destruction was not observed up to 98°C, just before the temperature at which water evaporates, demonstrating excellent thermal stability.

[0074] Figure 7 shows that the comparative example nanofluid can absorb all ultraviolet and infrared wavelengths, but because there are solid particles in the fluid, it can absorb the wavelengths required for electrical energy production, and there can be problems with precipitation when the fluid flows.

[0075] On the other hand, in Figure 7, A is Oleylamine (C 18 H 37 N) fluid, and BD is Oleylamine to which Cu9S5 has been added at various concentrations.

[0076] In this case, solid nanoparticles can effectively reduce heat when they come into direct contact with the bottom of the solar panel as conductive heat transfer is promoted more than with water. However, when they flow into the top, they absorb some of the wavelengths necessary for the photoelectric effect, and there is also the problem of the particles settling when used for a long period of time.

[0077] Figure 8 shows the light transmittance of the example and water (comparative example) when 0.05wt% of each oil was dispersed in water, and the addition of only 0.05wt% oil showed low transmittance at wavelengths below 730nm. In the example of the present invention, silicone oil was selected and detailed experiments were carried out.

[0078] Figure 9 shows the thermal conductivity depending on the concentration of silicone oil. Although the thermal conductivity of silicone oil is lower than that of water, the concentration of silicone oil added is similar to that of water. In other words, when it comes into contact with a solar panel and exchanges heat, it is expected to produce results similar to those of water.

[0079] Figure 10 is a graph showing the temperature rise of a solar panel for each oil when a fluid filter is placed on the solar panel.

[0080] When nothing was applied, it was normal with only air, and after 60 minutes the temperature reached 57.7℃. When water was applied, it reached 56.2℃, a cooling effect of 1.5℃. However, when the oil spectrum fluid filter was applied, the effect was greater than water, and in the case of silicone oil, it was confirmed that it showed a maximum cooling effect of 4.1℃ at 53.6℃.

[0081] The above detailed description is illustrative of the present invention. Moreover, the above description is illustrative of preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the inventive concept disclosed in the present specification, the scope of equivalents to the above disclosure, and / or the scope of the technology or knowledge of the art. The above embodiment describes the best state for realizing the technical idea of ​​the present invention, and various modifications are possible as required by specific application fields and uses of the present invention. Therefore, the above detailed description of the invention is not intended to limit the present invention to the disclosed embodiment. The appended claims should be interpreted to include other embodiments.

Claims

1. A transparent channel formed in a '⊃' shaped tube, an emulsion contained within the transparent channel; The emulsion comprises a dispersed surfactant and an oil. An emulsion spectrum fluid filter that allows control of light wavelength absorption.

2. The transparent channel is Inner walls with a cross section shaped like a letter '⊃' and The outer wall is located outside the inner wall and has a cross section in the shape of a letter '⊃'; The transparent channel is An inlet and an outlet are formed at one end, and a curved portion is formed at the other end.

2. The emulsion spectral fluid filter according to claim 1, wherein the emulsion spectral fluid filter has a controllable light wavelength absorption.

3. The transparent channel is a first region in which the emulsion is transferred from the injection port to the curved portion; and a second region located above the first region, through which the emulsion is transported from the curved portion to the outlet side; 3. The emulsion spectral fluid filter according to claim 2, wherein the light wavelength absorption is controllable.

4. A solar cell is fixed to an upper surface of the inner wall in the first region.

4. The emulsion spectral fluid filter capable of controllable light wavelength absorption according to claim 3.

5. In the first region, the emulsion absorbs heat from the solar cell; In the second region, the emulsion absorbs light having a wavelength of 730 nm or less and 1130 nm or more from light incident on the solar cell side.

5. The emulsion spectral fluid filter capable of controllable light wavelength absorption according to claim 4.

6. The oil may include at least one of silicone oil, corn oil, mineral oil (white oil), lubricant, and soybean oil; 2. The emulsion spectral fluid filter according to claim 1, wherein the emulsion spectral fluid filter has a controllable light wavelength absorption.

7. The oil is mixed in the emulsion at 0.05 wt % or less.

7. The emulsion spectral fluid filter having controllable light wavelength absorption according to claim 6.

8. The surfactant is The composition is a mixture of a low HLB surfactant and a high HLB surfactant, Oleic acid, Sorbitan trioleate, Sorbitan monooleate, (sorbitan monostearate) Sorbitan Monostearate, Sorbitan Monolaurate, Polyoxyethylene 5 sorbitan monooleate, Triethanolamine oleate, Polyoxyethylene 20 sorbitan monostearate, Polyoxyethylene 20 sorbitan monostearate Polyoxyethylene sorbitan monooleate, Polyoxyethylene 20 sorbitan monolaurate, Sodium oleate, and Potassium oleate, 2. The emulsion spectral fluid filter according to claim 1, wherein the emulsion spectral fluid filter has a controllable light wavelength absorption.

9. The mixing ratio of the oil to the surfactant ranges from 2:1 to 8:

1.

2. The emulsion spectral fluid filter according to claim 1, wherein the emulsion spectral fluid filter has a controllable light wavelength absorption.

10. mixing a low HLB surfactant with a high HLB surfactant to form a surfactant mixed fluid; mixing the surfactant mixed fluid with oil to generate a mixed fluid; and mixing water with the mixed fluid. A method for producing emulsions that can control the absorption of light wavelengths.

11. After the step of mixing with water, further comprising an ultrasonic milling step; A method for producing an emulsion capable of controlling light wavelength absorption according to claim 10.

12. The oil includes at least one of silicone oil, corn oil, mineral oil (white oil), lubricant, and soybean oil; A method for producing an emulsion capable of controlling light wavelength absorption according to claim 10.

13. mixing the oil to generate a mixed fluid, The oil is mixed in an amount of 0.05 wt % or less relative to the emulsion. A method for producing an emulsion capable of controlling light wavelength absorption according to claim 10.

14. In the step of generating the surfactant mixed fluid, The surfactant mixed fluid is Oleic acid, Sorbitan trioleate, Sorbitan monooleate, (sorbitan monostearate) Sorbitan Monostearate, Sorbitan Monolaurate, Polyoxyethylene 5 sorbitan monooleate, Triethanolamine oleate, Polyoxyethylene 20 sorbitan monostearate, Polyoxyethylene 20 sorbitan monostearate Polyoxyethylene sorbitan monooleate, Polyoxyethylene 20 sorbitan monolaurate, Sodium oleate, and Potassium oleate, A method for producing an emulsion capable of controlling light wavelength absorption according to claim 10.

15. mixing the oil to generate a mixed fluid, The mixing ratio of the oil to the surfactant ranges from 2:1 to 8:

1. A method for producing an emulsion capable of controlling light wavelength absorption according to claim 10.

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