Ternary system based on ionic liquid micelles, carbon dots and eutectic solvent

Abstract

The invention discloses a ternary system based on ionic liquid micelles, carbon dots and a deep eutectic solvent. The ternary system is characterized in that the appearance of the ternary system is two phases which are mutually insoluble, the upper phase is a micellar aqueous solution formed by long-carbon-chain imidazole amino acid type ionic liquid (ILs) through molecular self-aggregation, and the lower phase is a uniform and transparent solution prepared by dispersing ginkgo leaf carbon dots (CDs) obtained by a hydrothermal method in a hydrophobic deep-eutectic solvent (DES). And stirring and mixing the two components at a certain temperature, and standing for layering to obtain the two-phase ternary ILs-CD (at) DES system. Due to the fact that the system has two phases which are immiscible and large in polarity difference, the system can simultaneously enrich compounds with different polarities from natural extracts with complex compositions in a directional mode. The system disclosed by the invention has the advantages of simple preparation process, diversified functions, convenience in composition adjustment, easiness in amplification and the like, and has a relatively good application prospect in the field of separation.

Description

Technical Field

[0003] The present invention belongs to the technical field of chemical separation, and particularly relates to a novel separation system that organically combines ionic liquids, carbon dots, and deep eutectic solvents. Background Art

[0005] Ionic liquids (ILs) refer to salts that are liquid at 100 °C and are composed entirely of anions and cations. ILs with both hydrophilic (such as polar anions) and hydrophobic groups (such as long carbon chain substituents in cations) in their structures usually have the properties of surfactants, and are then called surface-active ionic liquids (SAILs). When the concentration of SAILs in a solution is higher than the critical micelle concentration (CMC), micelles can be formed by molecular self-aggregation. When ILs form micelles in an aqueous solution, the hydrophilic heads face outwards, and the long carbon chain substituents aggregate inwards due to hydrophobic interactions to form a non-polar micelle core. Weakly polar compounds in the solution can be well distributed in the non-polar microenvironment, and this process is similar to traditional "liquid-liquid extraction", except that the "organic phase" is formed in the aqueous phase (Paleologos E K, Giokas D L, Karayannis M I. TrAC Trends in Analytical Chemistry, 2005, 24(5): 426-436). The presence of micelles in the solution can not only increase the solubility of the target component, but also has a certain protective effect on some sensitive substances, so it has advantages in extracting and separating specific components.

[0006] Among many new materials, carbon dots (CDs) are a remarkable member. CDs are carbon nanoparticles with a size less than 10 nm and are new members of the carbon family. From traditional industrial carbons (such as activated carbon) to new industrial carbons (such as carbon fiber) and new carbon nanomaterials such as graphene and carbon nanotubes, the basic research and application of carbon-based materials have always been hot topics in the fields of chemistry, materials, etc. Due to the advantages of CDs such as low toxicity, ultra-high specific surface area, chemical inertness, and excellent electron transfer characteristics, they have currently been widely used in many fields such as sensors, energy storage, bioimaging, catalytic synthesis, and drug delivery (Li S, Li L, Tu H, et al. Materials Today, 2021(51):188-207). Despite having various performance advantages, the application of CDs in the separation field has been reported less currently.

[0007] Deep eutectic solvent (DES) is a new type of functionalized green solvent similar to ionic liquids, which is a eutectic mixture formed by two or more components through hydrogen bonding and is liquid at room temperature. The components forming DES include hydrogen bond donors (HBD) and hydrogen bond acceptors (HBA). Usually, components with high biocompatibility are obtained through a "one-pot" reaction. Therefore, DES has the advantages of being green, biodegradable, simple in preparation process, and strong in designability, making it a green alternative to traditional solvents. Currently, DES has been widely used in many fields such as materials, chemical engineering, medicine, and energy production (Hansen B B, Spittle S, Chen B, et al. Chemical reviews, 2020, 121(3): 1232-1285). When applied to the field of extraction and separation, DES exhibits strong and broad solubility. Moreover, due to the adjustable composition of DES, various HBAs and HBDs can be flexibly selected according to the polarity of the object to be separated, so it is suitable for the separation process of compounds with different hydrophilic / hydrophobic properties.

[0008] Many natural products often contain both strongly polar components (such as glycosides, organic acids, etc.) and weakly polar components (such as terpenoids, oils and fats). Currently, the main separation strategy is to sequentially perform stepwise extraction with organic solvents of different polarities, and then a series of extraction fractions enriched with different components are obtained respectively. This method not only consumes a large amount of reagents, has slow phase separation, but also has cumbersome operations and is time-consuming. In addition, many commonly used solvents are also flammable and explosive organic solvents, which are not safe and environmentally friendly. Considering that ILs, CDs and DES are all hotspots in the above related fields and have obvious performance advantages and considerable application prospects, the organic combination of the three to prepare a functionalized environmentally friendly separation system can make up for the deficiencies of existing separation methods, so it has important research significance and industrial value. Summary of the Invention

[0010] The purpose of the present invention is to provide a separation system that simultaneously has the advantages of ionic liquids, carbon dots and deep eutectic solvents. The appearance characteristics of this system are similar to "aqueous two-phase systems": the upper layer is a hydrophilic ILs micellar solution for enriching components with relatively large polarity; the lower layer is a hydrophobic CD@DES solution for separating substances with relatively small polarity. Among them, the ionic liquid micelles are prepared by dissolving imidazole amino acid-based ILs [C n mim][AA] (n = 8-16, AA = Amino acid) in water (C≥CMC). [C nThe synthesis method is as follows: Under N2 protection, the raw material N-methylimidazole and bromoalkane (or chloroalkane) are used to generate the intermediate [C n mim]Br or [C n mim]Cl through a one-pot method, and then a strong basic anion exchange resin is used to replace the Br - or Cl - of the intermediate with OH - , and finally, it reacts with amino acids such as phenylalanine (Phe), alanine (Ala), and proline (Pro) through an acid-base neutralization reaction to form the final product. The preparation method of CDs is to disperse ginkgo leaf powder in ultrapure water, react in a polytetrafluoroethylene-lined autoclave at 200 °C, and then obtain CDs powder through centrifugation, filtration, dialysis, and freeze-drying in sequence. The hydrophobic DES is obtained by reacting HBA (N 8,8,8,1 Cl, oleic acid) and HBD (ethanol, ethylene glycol, glycerol) at room temperature. Dissolve the CDs powder in the hydrophobic DES, stir well, and let it stand at room temperature for 24 h to obtain CD@DES. Mix the ILs micelle solution and the CD@DES solution at room temperature, and let it stand and layer to obtain the ILs-CD@DES system with a bilayer structure. The preparation process of the novel ternary separation system in the present invention is simple, the method is mature, and it is easy to realize large-scale preparation. Since it simultaneously includes three functionalized media and is composed of two immiscible phases, it can separate hydrophilic and hydrophobic components simultaneously, so it has good development and application prospects.

[0011] Technical solution: To achieve the above object, a preparation method based on an ionic liquid micelle and a carbon dot deep eutectic solvent ILs-CD@DES ternary system is established:

[0012] A ternary system based on an ionic liquid micelle, carbon dots, and a deep eutectic solvent, characterized in that the ternary system is composed of an ionic liquid micelle, carbon dots, and a hydrophobic deep eutectic solvent.

[0013] The ternary system based on an ionic liquid micelle, carbon dots, and a deep eutectic solvent according to claim 1, characterized in that the ionic liquid is a long-chain imidazole amino acid-based ionic liquid; the alkyl chain length at the C-1 position of the cationic imidazole ring is C8~C 18 , and the anion is derived from alanine, phenylalanine, or proline.

[0014] The ternary system based on an ionic liquid micelle, carbon dots, and a deep eutectic solvent according to claim 1, characterized in that the ionic liquid micelle is formed from an aqueous solution of a long-chain imidazole amino acid-based ionic liquid with a concentration ≥ 5 mM at 35~90 °C.

[0015] The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvents as described in claim 1 is characterized in that the carbon dots are prepared by hydrothermal method using ginkgo leaves; specifically, after weighing ginkgo leaves and ultrapure water at a mass-to-volume ratio of 1:5 to 1:30 (g: mL), reacting at 150 to 350 °C for 5 to 24 h, centrifuging at a speed of 1000 to 10000 r / min for 5 to 30 min, taking the supernatant, passing it through a 0.22 μm filter membrane, and then dialyzing it with a dialysis bag (1000 Dalton). The dialysate is freeze-dried to obtain the carbon dot product.

[0016] The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvents as described in claim 1 is characterized in that the deep eutectic solvent is a hydrophobic deep eutectic solvent, specifically composed of methyltrioctylammonium chloride N 8,8,8,1 Cl - ethanol, N 8,8,8,1 Cl - ethylene glycol, N 8,8,8,1 Cl - glycerol, oleic acid - ethanol, oleic acid - ethylene glycol or oleic acid - glycerol are stirred at a molar ratio (HBA: HBD) of 0.1:1 to 10:1 at 25 to 65 °C for 0.5 - 12 h to obtain.

[0017] The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvents as described in claim 1 is characterized in that the carbon dots are dispersed in the deep eutectic solvent at a mass-to-volume ratio (g: mL) of 0.001:1 to 0.1:1 and stirred at room temperature until a homogeneous transparent solution is formed.

[0018] The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvents as described in claim 1 is characterized in that the ionic liquid micelles are added to the homogeneous transparent solution formed by carbon dots and deep eutectic solvent at a volume ratio of 1:0.1 to 1:10 (mL: mL) and stirred and mixed at 20 to 80 °C. After standing and separating into layers, the ternary system is obtained.

[0019] The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvents as described in claim 1 is characterized in that the ternary system is mainly used for simultaneously separating components with different polarities in a multi-component sample. Brief Description of the Drawings

[0021] To more fully illustrate the technical solutions of the specific embodiments of the present invention, the accompanying drawings required in the embodiments will be briefly described below. The described drawings are only a part of the embodiments of the present invention. For those skilled in the art, other drawings of the embodiments should be obtainable based on these drawings. Among them:

[0022] Figure 1 For [C 18 mim]Br, [C 18mim]L-Ala, [C 18 mim]L-Phe, [C 18 Tyndall effect diagram of mim]L-Pro micelles (the optical path is indicated by the arrow).

[0023] Figure 2 For the determination of [C 18 mim]L-Phe micelles CMC at different temperatures by conductivity method.

[0024] Figure 3 For [C 18 Linear relationship between the logarithm of the conductivity lnК of mim]L-Phe micelles and the reciprocal of the temperature 1 / T.

[0025] Figure 4 Appearance of DES and CD@DES.

[0026] Figure 5 The upper phase of the ILs-CD@DES ternary system is used for the separation of flavonoids.

[0027] Figure 6 Standard curves of flavonoids rutin and ginkgolide B. Detailed implementation mode

[0029] The following is a detailed description of the present invention. Although specific embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0030] This specification and the claims do not distinguish components by the difference in words, but by the difference in the functions of the components as the criterion. The terms "comprising" or "including" mentioned in this application are open terms, so they should be interpreted as "including but not limited to". The embodiments described in the subsequent description of the specification are the preferred embodiments of the present invention and are for the purpose of the general guidelines of the specification, and are not intended to limit the scope of the present invention.

[0031] Example 1 Preparation and characterization of [C8mim]L-Ala micelles

[0032] Weigh 2 g of [C8mim]L-Ala and disperse it in 10 mL of UP water. Stir at 55 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red optical path appears in the main body of the solution, and the appearance of the "Tyndall effect" indicates the formation of micelles.

[0033] Example 2 [C 10Preparation and Characterization of [C

[0034] Weigh 1 g of [C 10 mim]L-Phe and disperse it in 10 mL of UP water. Stir at 65 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red light path appears in the main body of the solution, and the appearance of the "Tyndall effect" indicates the formation of micelles.

[0035] Example 3 [C 12 Preparation and Characterization of [C

[0036] Weigh 1 g of [C 12 mim]L-Pro and disperse it in 10 mL of UP water. Stir at 60 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red light path appears in the main body of the solution, and the appearance of the "Tyndall effect" indicates the formation of micelles.

[0037] Example 4 [C 14 Preparation and Characterization of [C

[0038] Weigh 1 g of [C 14 mim]L-Phe and disperse it in 10 mL of UP water. Stir at 60 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red light path appears in the main body of the solution, and the appearance of the "Tyndall effect" indicates the formation of micelles.

[0039] Example 5 [C 16 Preparation and Characterization of [C

[0040] Weigh 1 g of [C 16 mim]L-Ala and disperse it in 10 mL of UP water. Stir at 65 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red light path appears in the main body of the solution, and the appearance of the "Tyndall effect" indicates the formation of micelles.

[0041] Example 6 [C 18 Preparation and Characterization of [C

[0042] Weigh 0.5 g of [C 18 mim]L-Ala and disperse it in 10 mL of UP water. Stir at 60 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red light path appears in the main body of the solution, as shown in the appendix Figure 1 below, and the appearance of the "Tyndall effect" indicates the formation of micelles.

[0043] Example 7 [C 18Preparation and Characterization of [C

[0044] Weigh 0.3 g of [C 18 mim]L-Phe and disperse it in 10 mL of UP water. Stir at 70 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red light path appears in the main body of the solution. As shown in the appendix Figure 1 It shows that the "Tyndall effect" appears, indicating the formation of micelles.

[0045] Example 8 Preparation and Characterization of [C 18 mim]L-Pro Micelles

[0046] Weigh 0.1 g of [C 18 mim]L-Pro and disperse it in 10 mL of UP water. Stir at 50 °C until completely dissolved. After cooling to room temperature, place the solution in the dark and irradiate it with a laser pointer. A red light path appears in the main body of the solution. As shown in the appendix Figure 1 It shows that the "Tyndall effect" appears, indicating the formation of micelles.

[0047] Example 9 Determination of the CMC of [C 18 mim]L-Phe Micelles by Conductivity Method

[0048] Prepare aqueous solutions of [C 18 mim]L-Phe with concentrations of 0.8 mM, 1 mM, 2 mM, 3 mM, 4 mM, 5 mM, 6 mM, 7 mM, 8 mM, and 10 mM. All solutions are prepared in volumetric flasks cleaned with dichromic acid to eliminate the contamination of other surfactants. Measure the conductivity of the above different concentrations of ILs at 25 ± 0.1 °C, 30 ± 0.1 °C, 35 ± 0.1 °C, 40 ± 0.1 °C, and 45 ± 0.1 °C respectively. Before the test, calibrate the instrument with 0.1 M KCl solution. Before each measurement, wash the electrode (platinum black electrode, electrode constant J = 0.989) with absolute ethanol and UP water in turn and gently dry it with filter paper, and then rinse it with the test solution. Immerse the electrode in the IL aqueous solutions of the above concentrations and keep it at a constant temperature until the reading of the conductivity meter is stable. Each value is measured in parallel three times and the average value is taken. Plot the concentration of ILs on the abscissa and the conductivity on the ordinate. As shown in the appendix Figure 2 It shows that the abscissa value corresponding to the turning point of the curve slope is the CMC. Therefore, the CMC of [C 18 mim]L-Phe ≈ 5 mM. Plot the natural logarithm of the conductivity against the reciprocal of the temperature, and it is found that there is a linear Arrhenius behavior between them, as shown in the appendix Figure 3 It shows. Further, calculate the conductivity activation energy E A from this curve and find that E A has a turning point at ≈ 5 mM, which corresponds to [C18 Formation of mim]L-Phe micelles.

[0049] Example 10 Preparation of Hydrophobic DES Methyltrioctylammonium Chloride-Ethanol

[0050] Mix 10 mL of N 8,8,8,1 Cl with 10 mL of ethanol and stir at 50 °C for 2 h. After cooling to room temperature, a homogeneous transparent solution is formed. After standing for 48 h without stratification, the product methyltrioctylammonium chloride-ethanol DES is obtained.

[0051] Example 11 Preparation of Hydrophobic DES Methyltrioctylammonium Chloride-Ethylene Glycol

[0052] Mix 10 mL of N 8,8,8,1 Cl with 5 mL of ethylene glycol and stir at 40 °C for 4 h. After cooling to room temperature, a homogeneous transparent solution is formed. After standing for 48 h without stratification, the product methyltrioctylammonium chloride-ethylene glycol DES is obtained.

[0053] Example 12 Preparation of Hydrophobic DES Oleic Acid-Ethanol

[0054] Mix 10 mL of oleic acid with 10 mL of ethanol and stir at 55 °C for 5 h. After cooling to room temperature, a homogeneous transparent solution is formed. After standing for 48 h without stratification, the product oleic acid-ethanol DES is obtained.

[0055] Example 13 Preparation of CD@DES (Methyltrioctylammonium Chloride-Ethylene Glycol)

[0056] Dissolve 0.008 g of CDs powder in the hydrophobic DES formed by 1 mL of ethylene glycol and 1 mL of N 8,8,8,1 Cl. Stir and react at 45 °C for 3 h. After the reaction, the CDs are completely dissolved. After standing for 24 h, no stratification or precipitation of CDs occurs, indicating the formation of CD@DES. Its appearance is as shown in the appendix Figure 4 as follows.

[0057] Example 14 Preparation of ILs-CD@DES Ternary System

[0058] Mix 5 mL of [C 18 mim]L-Phe micelle aqueous solution with 5 mL of CD@DES solution and stir at 50 °C for 2 h. After the reaction, cool to room temperature and stratify to obtain two immiscible phases. The upper layer is the ILs aqueous solution, and the lower layer is the CD@DES solution.

[0059] Example 15 Extraction of Flavonoids from Ginkgo biloba Leaves with ILs Micelle Aqueous Solution

[0060] Using [C 18Taking the extraction of flavonoids from Ginkgo biloba leaves with [mim]L-Phe solution as an example, the effects of ionic liquid concentration, reaction temperature, reaction time, and solid-liquid ratio on the extraction efficiency of flavonoids from Ginkgo biloba leaves were investigated. As shown in the appendix Figure 5 (A), an appropriate ILs concentration is beneficial to the extraction of flavonoids from Ginkgo biloba leaves. When C IL < CMC, the extraction rate of flavonoids by ionic liquid is relatively low. When C IL = 10 mM, the extraction rate of flavonoids reaches the maximum. Further increasing the ionic liquid concentration will lead to a decrease in the extraction rate, which may be due to the increase in the viscosity of the system caused by too high an IL concentration, thus being unfavorable for mass transfer. As can be seen from the appendix Figure 5 (B), with the increase of the extraction temperature, the extraction rate increases. When T = 50 °C, the extraction rate is the highest. Further increasing the temperature, the increase in the flavonoid extraction rate is not obvious. In the appendix Figure 5 (C), the longer the extraction time, the higher the extraction rate, and the maximum extraction rate is reached when extracting for 90 min. According to the appendix Figure 5 (D), the effect of the solid-liquid ratio on the extraction rate is relatively significant. Appropriately increasing the solid-liquid ratio can increase the flavonoid extraction rate, but when there are too many solid components in the system, it will have a negative impact on the subsequent centrifugation operation and also make the ionic liquid relatively insufficient, thus reducing the flavonoid extraction rate.

[0061] Example 16 Simultaneous separation of flavonoids and terpene lactones from Ginkgo biloba leaves by the ILs-CD@DES ternary system

[0062] Weigh 1 g of Ginkgo biloba leaf powder and add 20 mL of ILs-CD@DES (the upper layer is 10 mL of [C 18 mim]L-Phe solution with a concentration of 10 mM, and the lower layer is an ethylene glycol / N 8,8,8,1 Cl solution with a CD concentration of 0.05 g / mL). Stir and react at 50 ± 0.1 °C for 1.5 h. After the reaction, centrifuge at 5000 r / min for 20 min. After the supernatant after centrifugation is stratified, both the upper and lower phases are filtered through a 0.22 μm filter membrane and then diluted to an appropriate multiple. Among them, the upper phase is measured for ultraviolet absorbance at 359 nm, and rutin is used for "one standard for multiple determinations". According to its ultraviolet standard curve (appendix Figure 6 (A)) and the linear fitting regression equation y = 36.139x + 0.028 (R 2 = 0.9993), the extraction rate of flavonoids is calculated; the lower phase solution is determined by HPLC-UV (Tanács D, Orosz T, Szakonyi Z, et al. Journal of Chromatography A, 2020, 1621: 461054), with ginkgolide B as the calibration substance. The HPLC conditions are: C 18Column (4.6×250 mm, 5 µm, Welch Materials, USA), detection wavelength 220 nm, column temperature 35 °C, mobile phase 20% acetonitrile aqueous solution, flow rate 1 mL / min, sample solvent is methanol. Then according to the standard curve (attached Figure 6 (B)) and the linear regression equation y = 5.948x + 5.732 (R 2 = 0.997), calculate the content of enriched terpene lactones in the sample. The results show that the separation efficiency of flavonoids and terpene lactones from Ginkgo biloba leaves in this system can reach over 80%. The whole process completely avoids the use of organic solvents, is easy to operate, environmentally friendly, and is expected to provide a new approach for the separation of similar natural products.

Claims

1. A ternary system based on ionic liquid micelles, carbon dots and a deep eutectic solvent, characterized in that: The ternary system is composed of ionic liquid micelles, carbon dots and a hydrophobic low eutectic solvent.

2. The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvent according to claim 1, characterized in that: The ionic liquid is a long carbon chain imidazole amino acid type ionic liquid; the length of the C-1 alkyl chain on the cationic imidazole ring is C8~C 18 , the anion comes from alanine, phenylalanine or proline.

3. The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvent according to claim 1, characterized in that: The ionic liquid micelle is formed by a long carbon chain imidazole amino acid type ionic liquid aqueous solution with a concentration of ≥5 mM at 35-90°C.

4. The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvent according to claim 1, characterized in that: The carbon dots are prepared by hydrothermal method using ginkgo leaves; specifically, the ginkgo leaves and ultrapure water are weighed at a mass volume ratio of 1:5 to 1:30 (g: mL), reacted at 150 to 350°C for 5 to 24 hours, centrifuged at a speed of 1000 to 10000 r / min for 5 to 30 minutes, the supernatant is filtered through a 0.22 μm filter membrane and then dialyzed using a dialysis bag (1000 Daltons), and the dialyzate is freeze-dried to obtain the carbon dot product.

5. The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvent according to claim 1, characterized in that: The low eutectic solvent is a hydrophobic low eutectic solvent, specifically methyl trioctyl ammonium chloride N 8,8,8,1 Cl -ethanol, N 8,8,8,1 Cl -ethylene glycol, N 8,8,8,1 Cl-propylene glycol, oleic acid-ethanol, oleic acid-ethylene glycol or oleic acid-propylene glycol in a molar ratio (HBA:HBD) of 0.1:1~10:1 are stirred at 25~65°C for 0.5-12 h to obtain the product.

6. The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvent according to claim 1, characterized in that: The carbon dots are dispersed in a low eutectic solvent at a mass volume ratio (g: mL) of 0.001:1 to 0.1:1, and stirred at room temperature until a uniform transparent solution is formed.

7. The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvent according to claim 1, characterized in that: The ionic liquid micelles are added to a uniform transparent solution formed by carbon dots and a low eutectic solvent at a volume ratio of 1:0.1-1:10 (mL: mL), stirred and mixed at 20-80° C., and the ternary system is obtained after standing and stratification.

8. The ternary system based on ionic liquid micelles, carbon dots and deep eutectic solvent according to claim 1, characterized in that: The ternary system is mainly used to simultaneously separate components of different polarities in a multi-component sample.

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