An electrolyte composition for cleaning OLED OPEN-MASK

Abstract

The present invention discloses an electrolyte composition for cleaning OLED OPEN-MASK, which is used to clean pollutants such as dust, partical and oil on the surface of OLED OPEN-MASK and in the evaporation hole. In terms of mass percentage, the composition comprises the following components: 5-10% of inorganic strong alkaline substances, 1-5% of inorganic salts, 0.5-5% of chelating agents, 1-5% of organic solvents, 0.1-5% of Gemini-type zwitterionic surfactants A, and the balance is water. The present invention significantly improves the conductivity of the solution and enhances the electrolytic capacity by mixing Gemini-type zwitterionic surfactants A with inorganic strong bases, inorganic salts, etc., and can effectively remove pollutants on the surface of OPEN-MASK and in the evaporation space. At the same time, it has an excellent corrosion inhibition effect on the mask, and can ensure that the mask is not corroded in an alkaline solution, and is easy to rinse without residue.

Description

Technical Field

[0001] The invention belongs to the field of wet electronic chemicals, and in particular relates to an electrolyte composition, which is mainly used for cleaning dust, particals and oil stains on the surface of an OLED mask and in a vapor deposition hole. Background Art

[0002] OLED (Organic Light-Emitting Diode), also known as organic electric laser display, refers to the phenomenon that organic semiconductor materials and luminescent materials emit light through carrier injection and recombination under the drive of an electric field. OLED is a device that uses a multi-layer organic thin film structure to produce electroluminescence. It is easy to make and only requires a low driving voltage. These main features make OLED very prominent in meeting the application of flat-panel displays. OLED displays are thinner and lighter than LCDs, have higher brightness, lower power consumption, faster response, higher clarity, better flexibility, and higher luminous efficiency, and can meet consumers' new demands for display technology.

[0003] OLED metal masks are used in the most critical evaporation process of OLED panel production. The accuracy, flatness and tolerance of the product directly affect the display effect of the panel. Therefore, the metal mask is one of the key factors affecting the yield of evaporation. Among them, open-mask is mainly used for evaporation of materials for transmission layer and conductive layer. The material of open-mask is mainly Invar alloy.

[0004] In the OLED industry, the quality of the mask directly affects the quality of the product. After the mask is initially processed and formed, metal and other particulate matter will remain in the grid or on the surface, affecting the normal use of the mask. During the recycling process, the mask will also have partial impurities, which will affect the accuracy and use of the mask. They must be removed before the mask is used to ensure the yield. As for the removal of these impurities, the industry mainly uses electrolysis, with the mask as the electrolysis cathode and titanium alloy as the electrolysis anode. By electrolyzing water, the hydrogen generated by the cathode is used to drive the movement of the electrolytic cleaning agent, thereby flushing the mask and taking away the peeled particle impurities to achieve a cleaning effect; at the same time, the electrolysis process will release heat, and the metal and dust particles will be peeled off by the movement of heat.

[0005] During the long-term cyclic use of electrolytic cleaning agents, as the ambient temperature rises, the concentration of the alkaline solution increases, and under the conditions of the presence of corrosive components such as oxygen and chloride ions in the ambient solution, the mask plate is corroded to varying degrees. Cleaning agents currently on the market often have corrosion phenomena. Most inorganic corrosion inhibitors are toxic inorganic salts, such as potassium chromate and sodium chromate. Although they have good corrosion inhibition effects, they are highly toxic and pollute the environment. Commonly used organic corrosion inhibitors such as diisopropylamine nitrite and urotropine are easily decomposed by alkali in strong alkaline solutions, making it difficult to achieve corrosion inhibition effects, affecting the electrolysis efficiency. The present invention adds a specific Gemini-type zwitterionic surfactant to the electrolyte, which can effectively solve the corrosion problem of the mask plate, and can also increase the conductivity of the solution and improve the electrolysis efficiency. Summary of the invention

[0006] In order to overcome the existing mask corrosion problem, the present invention designs an electrolyte composition for cleaning OLED OPEN-MASK. By adding a specific Gemini-type zwitterionic surfactant A, the electrolytic cleaning efficiency and the corrosion inhibition effect on the mask are met while improving the conductivity of the electrolyte. The composition can effectively clean the dust, particals and oil stains on the mask surface and in the evaporation holes, while preventing corrosion to the mask, improving the electrolysis efficiency, reducing the electrolysis cost, and being easy to rinse without residue.

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] An electrolyte composition for cleaning OLED OPEN-MASK, the composition comprises the following components by mass percentage: 5-10% of an inorganic strong alkaline substance, 1-5% of an inorganic salt, 0.5-5% of a chelating agent, 1-5% of an organic solvent, 0.1-5% of a Gemini type zwitterionic surfactant A, and the balance is water. The Gemini type zwitterionic surfactant A is selected from the following structures:

[0009] ,

[0010] Wherein, n is an integer from 1 to 10.

[0011] The preparation method of the Gemini type zwitterionic surfactant A comprises the following steps:

[0012] (1) Synthesis of Bisimidoline 3:

[0013] Acetic acid and xylene are mixed, and a xylene solution containing tetraethylenepentamine is added dropwise and stirred. The obtained mixture is reacted at 90°C-140°C for 2-3 hours, cooled to room temperature, and then the xylene is removed by vacuum distillation. The reaction system is dissolved in xylene and reacted at 240°C for 6-8 hours. The solvent is removed to obtain bisimidazoline 3. The reaction formula is as follows:

[0014] .

[0015] (2) Synthesis of glycidyl ether 6:

[0016] Polyethylene glycol, epichlorohydrin, and sodium hydroxide were mixed in a molar ratio of 1:1.2:1, and ethanol was added as a solvent. The mixture was reacted at 40°C for 10 h. After the reaction, the system was quenched with water, extracted with ethyl acetate, and the solvent was dried by spin drying. The mixture was recrystallized with n-hexane to obtain a white solid glycidyl ether 6. The reaction formula is as follows:

[0017] .

[0018] (3) Synthesis of glycol-based imidazoline 7:

[0019] The bisimidazoline 3 obtained in step (1) and the glycidyl ether 6 obtained in step (2) are added to an ethanol solution containing 10 wt % sodium hydroxide in a molar ratio of 1:1, stirred and mixed evenly, and heated under reflux for 20 h. After the reactants are cooled, the inorganic salts are first removed by suction filtration, and the filtrate is distilled under reduced pressure to remove the solvent, and then recrystallized with an acetone-methanol mixed solvent to obtain the final product ethylene glycol imidazoline 7; the reaction formula is as follows:

[0020] .

[0021] (4) Synthesis of Gemini-type zwitterionic surfactant A:

[0022] The intermediate 7, sodium chlorosulfonate and sodium hydroxide prepared above were added to the reaction bottle in a molar ratio of 1:2:1, dissolved in 50mL of isopropanol-water (volume ratio of 1:1) mixed solvent and stirred evenly. React at 45°C for 4h. Then heat to reflux temperature and continue to react for 60h (the pH of the reaction system needs to be adjusted to 8-9 with saturated sodium carbonate solution during the reaction). After the reaction, the solvent was removed by vacuum distillation, the residue was dissolved in hot anhydrous ethanol, and filtered while hot to remove solid impurities. The filtrate volume was concentrated to half, placed in an ice water bath for cooling, and after the solid precipitated, it was filtered, recrystallized (acetone-ethanol mixed solvent), and dried to obtain a white solid product A; the reaction formula is as follows:

[0023] .

[0024] Furthermore, the Gemini-type zwitterionic surfactant, in which the bisimidazoline group interacts with the ethylene glycol group, can quickly penetrate into the mask surface. Due to the special structure of the imidazoline molecule, its hydrophilic group contains N atoms with lone pairs of electrons, which are easy to form coordination bonds with metal atoms, thereby chemical adsorption to slow down corrosion. Its hydrophobic side chains can form a hydrophobic film on the surface away from the metal, effectively preventing further erosion by the corrosive medium; the zwitterionic surfactant molecules have both cationic groups and anionic groups, and are charged, which improves the conductivity and the electrolysis efficiency, and can effectively remove pollutants on the OPEN-MASK surface and in the evaporation space. The interaction between the zwitterionic surfactant molecules is relatively strong, and they promote each other's adsorption at the solution interface. The interface adsorption density is high, which can effectively reduce the surface tension and enhance the permeability; the use of Gemini-type surfactants can greatly reduce the amount of surfactants used and improve the surface activity.

[0025] Furthermore, the inorganic strong alkaline substance is selected from any one or more of the following groups, including potassium hydroxide, lithium hydroxide, sodium hydroxide, calcium hydroxide, barium hydroxide, rubidium hydroxide, cesium hydroxide, francium hydroxide, etc.

[0026] Furthermore, the inorganic salt is selected from any one or more of the following groups, including sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, sodium borate, sodium metasilicate, and trisodium phosphate.

[0027] Further, the chelating agent is selected from any one or more of the following groups, including ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, gluconic acid, sodium gluconate, citric acid, nitrilotriacetic acid, trisodium nitrilotriacetate, calcium acetate, sodium pyrophosphate, disodium hydrogen phosphate, sodium polyphosphate, diethylenetriaminepentaacetic acid, diethylenetriaminepentaacetic acid pentasodium, hydroxyethylethylenediamine, triethylenediamine, etc.

[0028] Further, the organic solvent is selected from any one or more of the following groups, including ethanol, ethylene glycol, propylene glycol, glycerol, isopropanol, isoamyl alcohol, n-butanol, cyclohexanol, benzyl alcohol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether and the like.

[0029] Furthermore, the preparation method of the composition is: adding an inorganic strong alkaline substance, an inorganic salt, and a chelating agent to high-purity water to form a uniform system at a stirring speed of 200 rpm, and then adding an organic solvent and a Gemini-type zwitterionic surfactant, and mixing them evenly to obtain a uniform, stable, clear and transparent composition.

[0030] Furthermore, the water is high-purity water with a resistance value greater than 18 MΩ / cm.

[0031] The significant advantages of the present invention are:

[0032] (1) By adding Gemini-type zwitterionic surfactants, the bisimidazoline group interacts with the ethylene glycol group and can quickly penetrate into the mask surface. Due to the special structure of the imidazoline molecule, its hydrophilic group contains N atoms with lone pairs of electrons, which can easily form coordination bonds with metal atoms, thereby chemically adsorbing and slowing down corrosion. Its hydrophobic side chains can form a hydrophobic film on the surface away from the metal, effectively preventing further erosion by the corrosive medium. Zwitterionic surfactant molecules have both cationic groups and anionic groups, and are charged, which increases the conductivity and electrolysis efficiency, and can effectively remove pollutants on the OPEN-MASK surface and in the evaporation air. The interaction between zwitterionic surfactant molecules is relatively strong, and they promote each other's adsorption at the solution interface. The interface adsorption density is high, which can effectively reduce surface tension and enhance permeability. The use of Gemini-type surfactants can greatly reduce the amount of surfactants used and improve surface activity.

[0033] (2) The various components in the composition of the present invention cooperate with each other to effectively improve the electrolysis efficiency, quickly and effectively remove various pollutants attached to the open-mask, and have no corrosion to the mask. At the same time, the composition is non-toxic and non-corrosive, has little odor, does not pollute the environment, and has the characteristics of low foaming and easy rinsing. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the preferred technical solutions and comparative examples in the examples. These embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by technicians without creative work are within the scope of protection. The unit of the portion can be gram, kilogram, ton, or other weight unit.

[0035] An electrolyte composition for cleaning OLED OPEN-MASK, the composition comprises the following components by mass percentage: 5-10% of an inorganic strong alkaline substance, 1-5% of an inorganic salt, 0.5-5% of a chelating agent, 1-5% of an organic solvent, 0.1-5% of a Gemini type zwitterionic surfactant A, and the balance is water. The Gemini type zwitterionic surfactant A is selected from the following structures:

[0036] ,

[0037] Wherein, n is an integer from 1 to 10.

[0038] The preparation method of the Gemini type zwitterionic surfactant A comprises the following steps:

[0039] (1) Synthesis of Bisimidoline 3:

[0040] Acetic acid and xylene are mixed, and a xylene solution containing tetraethylenepentamine is added dropwise and stirred. The resulting mixture is reacted at 90°C-140°C for 2-3 hours, cooled to room temperature, and then the xylene is removed by vacuum distillation. The reaction system is dissolved in xylene and reacted at 240°C for 6-8 hours. The solvent is removed to obtain bisimidazoline 3:

[0041] .

[0042] (2) Synthesis of glycidyl ether 6:

[0043] Polyethylene glycol, epichlorohydrin, and sodium hydroxide were mixed in a molar ratio of 1:1.2:1, and ethanol was added as a solvent. The mixture was reacted at 40°C for 10 h. After the reaction, the system was quenched with water, extracted with ethyl acetate, and the solvent was dried by spin drying. The mixture was recrystallized with n-hexane to obtain a white solid glycidyl ether 6.

[0044] .

[0045] (3) Synthesis of glycol-based imidazoline 7:

[0046] The bisimidazoline 3 obtained in step (1) and the glycidyl ether 6 obtained in step (2) were added to an ethanol solution containing 10 wt % sodium hydroxide in a molar ratio of 1:1, stirred and mixed evenly, and heated under reflux for 20 h. After the reactants were cooled, the inorganic salts were first removed by suction filtration, and the filtrate was distilled under reduced pressure to remove the solvent, and then recrystallized with an acetone-methanol mixed solvent to obtain the final product ethylene glycol imidazoline 7:

[0047] .

[0048] (4) Synthesis of Gemini-type zwitterionic surfactant A:

[0049] The intermediate 7, sodium chlorosulfonate and sodium hydroxide prepared above were added to the reaction bottle in a molar ratio of 1:2:1, dissolved in 50mL of isopropanol-water (volume ratio of 1:1) mixed solvent and stirred evenly. React at 45°C for 4h. Then heat to reflux temperature and continue to react for 60h (the pH of the reaction system needs to be adjusted to 8-9 with saturated sodium carbonate solution during the reaction). After the reaction, the solvent was removed by vacuum distillation, the residue was dissolved in hot anhydrous ethanol, and filtered while hot to remove solid impurities. The filtrate volume was concentrated to half, placed in an ice water bath for cooling, and after the solid precipitated, it was filtered, recrystallized (acetone-ethanol mixed solvent), and dried to obtain a white solid product A:

[0050] .

[0051] When n=1, the characterization data of the specific ethylene glycol-based Gemini zwitterionic surfactant used, compound A is as follows:

[0052] 1 H NMR (300 MHz, DMSO- d6 ), d : 2.26 (s, 6H, CH3), 3.4-3.48 (m, 12H, CH2), 3.56-3.8 (m, 14H, CH2), 4.12 (s, 1H,OH), 5.4 (s, 2, CH,OH).

[0053] 13 C NMR (125 MHz, DMSO- d6 ), d : 23.1, 46, 48.7, 53.8, 54, 54.4, 56.5, 61.6,62.0, 68.7, 95.5, 166.

[0054] HRMS calculated for C18H36ClN5NaO6S (M+H) + : 508.09, measured value 508.19.

[0055] The Gemini type zwitterionic surfactant, wherein the bisimidazoline group interacts with the ethylene glycol group, can quickly penetrate into the mask surface. Due to the special structure of the imidazoline molecule, its hydrophilic group contains N atoms with lone pairs of electrons, which are easy to form coordination bonds with metal atoms, thereby chemical adsorption occurs to slow down corrosion, and its hydrophobic side chains can form a hydrophobic film on the surface away from the metal, effectively preventing further erosion by the corrosive medium; the zwitterionic surfactant molecules have both cationic groups and anionic groups, carry electric charges, improve electrical conductivity, improve electrolysis efficiency, and can effectively remove pollutants on the OPEN-MASK surface and in the evaporation space. The interaction between the zwitterionic surfactant molecules is relatively strong, and they promote each other's adsorption at the solution interface. The interface adsorption density is high, which can effectively reduce surface tension and enhance permeability; the use of Gemini type surfactants can greatly reduce the amount of surfactants used and improve surface activity.

[0056] The inorganic strong alkaline substance is selected from any one or more of the following groups, including potassium hydroxide, lithium hydroxide, sodium hydroxide, calcium hydroxide, barium hydroxide, rubidium hydroxide, cesium hydroxide, francium hydroxide and the like.

[0057] The inorganic salt is selected from any one or more of the following groups, including sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, sodium borate, sodium metasilicate, and trisodium phosphate.

[0058] The chelating agent is selected from any one or more of the following groups, including ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, gluconic acid, sodium gluconate, citric acid, nitrilotriacetic acid, trisodium nitrilotriacetate, calcium acetate, sodium pyrophosphate, disodium hydrogen phosphate, sodium polyphosphate, diethylenetriaminepentaacetic acid, pentasodium diethylenetriaminepentaacetate, hydroxyethylethylenediamine, triethylenediamine, etc.

[0059] The organic solvent is selected from any one or more of the following groups, including ethanol, ethylene glycol, propylene glycol, glycerol, isopropanol, isopentanol, n-butanol, cyclohexanol, benzyl alcohol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether and the like.

[0060] The preparation method of the composition is as follows: adding an inorganic strong alkaline substance, an inorganic salt, and a chelating agent into high-purity water to form a uniform system at a stirring speed of 200 rpm, and then adding an organic solvent and a Gemini-type zwitterionic surfactant, and mixing them evenly to obtain a uniform, stable, clear and transparent composition.

[0061] The water is high-purity water with a resistance value greater than 18MΩ / cm.

[0062] Example:

[0063] According to the formula in Table 1, cleaning agent compositions with different compositions were prepared.

[0064] Embodiment and comparative example: electrolyte composition for cleaning OLED mask.

[0065] The electrolyte compositions of the examples and comparative examples were prepared according to the compositions and mass percentages shown in Table 1. The different examples were obtained by adding raw materials of different components and mixing them uniformly.

[0066] Table 1

[0067]

[0068] In order to evaluate the electrolytic cleaning effect of the electrolyte compositions of Examples 1-5 and Comparative Examples 1-5 on the mask, relevant tests were conducted through the following experiments.

[0069] The test method is as follows:

[0070] 1. Cut the mask sheet into 1.7cm×2.0cm size to connect the cathode electrode, and customize the platinum titanium electrode 3cm×4cm to connect the anode electrode;

[0071] 2. Coat the mask sheet used as cathode with a certain amount of sticky PT to simulate the removal ability of macromolecular substances during electrolysis;

[0072] 3. Place the prepared mask sheet with impurities into the electrolyte and perform electrolysis at room temperature at 25°C. After the electrolysis is completed within the prescribed time, rinse the electrolyte remaining on the electrode with isopropyl alcohol and wash with pure water. Then blow dry the electrode with nitrogen and observe under a microscope:

[0073] ① Removal rate of sticky PT on the mask surface, removal rate (mass %) = [{weight of sample before cleaning (g)} - {weight of sample after cleaning (g)}] / [{weight of sample before cleaning (g)} - {weight of test piece (g)}] × 100

[0074] ② Mask Partical Residue

[0075] ③Corrosion of anode electrode.

[0076] The results are shown in Table 2:

[0077] Table 2

[0078]

[0079] It can be seen from Table 1 and Table 2 that the electrolyte composition for cleaning the OLED OPEN-MASK of the present invention, as shown in Examples 1-4, can completely remove the sticky PT on the surface of the mask sheet, has an excellent cleaning effect on macromolecular substances, has a good removal effect on particulate impurities such as Partical, and does not corrode the mask plate, can reduce the replacement frequency of the electrode, improve the electrolysis efficiency, reduce the loss, and save costs.

[0080] Compared with Example 1, Comparative Example 1 without adding Gemini zwitterionic surfactant A has the same ability to remove particulate impurities and sticky PT, but has a certain corrosion behavior on the mask.

[0081] Compared with Example 1, Comparative Example 2 does not add inorganic salt, and its ability to remove sticky PT and particulate impurities is worse than that of Example 1.

[0082] Compared with Example 1, Comparative Example 3 does not add inorganic strong alkali to ensure that the metal electrode is not corroded, but the content of inorganic strong alkali seriously affects the electrolysis efficiency and has a poor ability to remove sticky PT particle impurities.

[0083] Compared with Example 1, Comparative Example 4 does not add a chelating agent and does not cause corrosion to the metal electrode, but sticky PT and particulate impurities show a re-sticking phenomenon.

[0084] Compared with Example 1, Comparative Example 5 does not add an organic solvent, thereby ensuring that no corrosion occurs to the metal electrode. However, the ability to remove sticky PT and particulate impurities is worse than that of Example 1.

[0085] It can be seen from the above embodiments and comparative examples that the addition of Gemini zwitterionic surfactants can definitely play a good corrosion inhibition role on the mask, improve the conductivity and permeability of the system, and improve the electrolysis efficiency. At the same time, the amount of inorganic strong base and inorganic salt added directly affects the electrolysis efficiency and the cleaning ability of metal ion impurities, etc. The chelating agent plays an important role in preventing the particles from sticking back. The amount of organic solvent added also has a certain effect on the stripping effect of particle impurities. Too low an amount of addition will also affect the cleaning ability. In summary, the positive progress of the present invention is that by adding Gemini zwitterionic surfactants and adjusting the content of inorganic strong base, inorganic salt, chelating agent and organic solvent, the corrosion inhibition performance of the electrolyte can be significantly improved, the electrolysis efficiency can be improved, the cost loss can be reduced, the cleaning ability of the mask can be improved, the service life is long, and it is easy to rinse.

[0086] The above embodiments describe the present invention in detail, but they are only examples and do not limit the patent scope of the present invention. Any equivalent modification and substitution of the present invention using the present description is also within the scope of the present invention and is included in the patent protection scope of the present invention.

Claims

1. An electrolyte composition for cleaning OLED OPEN-MASK, characterized in that: The composition comprises the following components by mass percentage: 5-10% of an inorganic strong alkaline substance, 1-5% of an inorganic salt, 0.5-5% of a chelating agent, 1-5% of an organic solvent, 0.1-5% of a Gemini type zwitterionic surfactant A, and the balance is water; The structural formula of the Gemini type zwitterionic surfactant A is as follows: ， Wherein, n is an integer from 1 to 10.

2. The electrolyte composition for cleaning OLED OPEN-MASK according to claim 1, characterized in that: The preparation method of the Gemini type zwitterionic surfactant A comprises the following steps: (1) Synthesis of Bisimidoline: Acetic acid and xylene are mixed, and a xylene solution containing tetraethylenepentamine is added dropwise and stirred. The resulting mixture is reacted at 90°C-140°C for 2-3 hours, cooled to room temperature, and then the xylene is removed by vacuum distillation. The reaction system is dissolved in xylene, reacted at 240°C for 6-8 hours, and the solvent is removed to obtain bisimidazoline: (2) Synthesis of glycidyl ether: Polyethylene glycol, epichlorohydrin, and sodium hydroxide were mixed in a molar ratio of 1:1.2:1, ethanol was added as a solvent, and the mixture was reacted at 40°C for 10 hours. After the reaction, the system was quenched with water, extracted with ethyl acetate, the solvent was dried, and then recrystallized with n-hexane to obtain a white solid glycidyl ether; (3) Synthesis of ethylene glycol imidazoline: The bisimidazoline obtained in step (1) and the glycidyl ether obtained in step (2) are added to an ethanol solution containing 10 wt % of sodium hydroxide in a molar ratio of 1:1, stirred and mixed evenly, and heated under reflux for 20 h. After the reactants are cooled, the inorganic salts are first removed by suction filtration, the filtrate is distilled under reduced pressure to remove the solvent, and then recrystallized with an acetone-methanol mixed solvent to obtain an intermediate ethylene glycol imidazoline; (4) Synthesis of Gemini-type zwitterionic surfactant A: The intermediate ethylene glycol imidazoline obtained in step (3), sodium chlorosulfonate and sodium hydroxide are added into a reaction flask in a molar ratio of 1:2:1, dissolved in an isopropanol-water mixed solvent and stirred evenly, and reacted at 45°C for 4 hours; then the temperature is raised to reflux temperature and the reaction is continued for 60 hours. After the reaction is completed, the solvent is removed by vacuum distillation, the residue is dissolved in hot anhydrous ethanol, and filtered to remove solid impurities. The filtrate is concentrated to half the volume and cooled in an ice-water bath. After the solid is precipitated, it is filtered, recrystallized and dried to obtain a white solid product, Gemini-type zwitterionic surfactant A.

3. The electrolyte composition for cleaning OLED OPEN-MASK according to claim 1, characterized in that: The inorganic strong alkaline substance is one or more of potassium hydroxide, lithium hydroxide, sodium hydroxide, calcium hydroxide, barium hydroxide, rubidium hydroxide, cesium hydroxide and francium hydroxide.

4. The electrolyte composition for cleaning OLED OPEN-MASK according to claim 1, characterized in that: The inorganic salt is one or more of sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, sodium borate, sodium metasilicate, and trisodium phosphate.

5. The electrolyte composition for cleaning OLED OPEN-MASK according to claim 1, characterized in that: The chelating agent is one or more of ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, gluconic acid, sodium gluconate, citric acid, nitrilotriacetic acid, trisodium nitrilotriacetate, calcium acetate, sodium pyrophosphate, disodium hydrogen phosphate, sodium polyphosphate, diethylenetriaminepentaacetic acid, pentasodium diethylenetriaminepentaacetate, hydroxyethylethylenediamine, and triethylenediamine.

6. The electrolyte composition for cleaning OLED OPEN-MASK according to claim 1, characterized in that: The organic solvent is one or more of ethanol, ethylene glycol, propylene glycol, glycerol, isopropanol, isopentanol, n-butanol, cyclohexanol, benzyl alcohol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, and propylene glycol monobutyl ether.

7. The electrolyte composition for cleaning OLED OPEN-MASK according to claim 1, characterized in that: The preparation method of the composition is as follows: adding an inorganic strong alkaline substance, an inorganic salt, and a chelating agent into high-purity water to form a uniform system at a stirring speed of 200 rpm, and then adding an organic solvent and a Gemini-type zwitterionic surfactant, and mixing them evenly to obtain a uniform, stable, clear and transparent composition.

8. The electrolyte composition for cleaning OLED OPEN-MASK according to claim 1, characterized in that: The water is high-purity water with a resistance value greater than 18MΩ / cm.

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