A kind of cutting fluid for aluminum alloy and preparation method thereof

Abstract

The present invention relates to the technical field of metal surface treatment, and in particular to a cutting fluid for aluminum alloy and a preparation method thereof. The cutting fluid for aluminum alloy is composed of the following raw materials in weight percentage: 20-25wt% of plant base oil, 10-14wt% of pH buffer, 4-6wt% of lubricant, 2-4wt% of rust inhibitor, 2-3wt% of coupling agent, 0.5-1.0wt% of defoamer, 0.8-1.5wt% of corrosion inhibitor, 6-10wt% of emulsifier, 1-3wt% of antibacterial agent, and the balance is deionized water; the antibacterial agent is an organic guanidine compound and a fluorine-containing baicalein sulfonylated derivative. The organic guanidine compound of the present invention has a bactericidal mechanism: the functional groups of the organic guanidine polymer molecules are positively charged, while bacteria and virus cells in water mostly carry negative charges. After being adsorbed on the surface of microorganisms, the organic guanidine inhibits the division of bacteria and viruses, causing them to lose their reproductive ability, thereby playing an inhibitory and bactericidal role; and the fluorine-containing baicalein sulfonylated derivative has a special binding site with Pseudomonas alcaligenes, thereby having a good inhibitory and killing effect on it.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface treatment, and in particular to a cutting fluid for aluminum alloy and a preparation method thereof. Background Art

[0002] Aluminum alloys are widely used in the manufacture of key parts in the fields of aerospace, automobiles, and machinery manufacturing. When aluminum alloys are processed and formed, they will be in contact with cutting fluids for a long time, and the state of the cutting fluids will have different degrees of influence on the surface quality of aluminum alloys. After aluminum alloys come into contact with cutting fluids with poor performance, corrosion phenomena such as white spots, black spots, white hairs, or dull color will appear. Once corrosion occurs in key parts during manufacturing, it is difficult to repair them mechanically, which will cause the parts to be directly scrapped, resulting in huge economic losses. The deterioration of cutting fluids will weaken various properties and have different degrees of negative impact on the processing process and workpiece quality. Evaporation loss of effective ingredients, thermal aging, metal ions, microbial contamination, etc. are all reasons for the deterioration of cutting fluids. Water-based cutting fluids have been developed rapidly due to their advantages of high thermal conductivity and low cost. Since water-based cutting fluids contain a large amount of water and organic components, fatty acid soaps as emulsifiers, fatty acids or other esters as oiliness agents, and some compounds containing double bonds may become nutrients for bacteria, making it easy for bacteria and mold to multiply, causing the effective ingredients in the cutting fluid to chemically decompose and become smelly and deteriorate, thereby reducing the lubrication and anti-rust properties of the cutting fluid and failing to meet the processing performance requirements.

[0003] The biological activity of microorganisms in cutting fluid is the main cause of the deterioration of cutting fluid. Since the use environment of cutting fluid is an open supply-return circulation mode, tap water used for cutting fluid dilution, dust in the air, contact with workers' hands, and residues in the bottom mud of the tank pipe will become ways for microorganisms to enter the cutting fluid. When the antibacterial agent fails, the organic matter in the cutting fluid will provide a large amount of nutrients for the metabolism of microorganisms. At present, there are a large number of literatures focusing on the diversity analysis of microorganisms in cutting fluids and the detection methods of pathogens. Eight species of bacteria have been found in Pseudomonas microorganisms alone. Pseudomonas alcaligenes has a good growth and reproduction state in cutting fluids. During the reproduction process, it will preferentially decompose organic matter containing nitrogen elements such as buffers and emulsifiers, reduce the pH value of the cutting fluid from weak alkalinity to neutral, and can degrade emulsifiers. The decrease in pH value and emulsifier content changes the state of the cutting fluid, making aluminum alloy more susceptible to corrosion in bacterial cutting fluids. The degradation of organic matter in cutting fluid by Pseudomonas alcaligenes is to first degrade organic matter into soluble inorganic matter, increase the ion concentration in the cutting fluid, cause the emulsion droplets to coalesce, and reduce the stability of the cutting fluid. The increase in the concentration of soluble inorganic salts reduces the solution resistance of the cutting fluid, increases the conductivity of the cutting fluid, and makes it easier for electron transfer to occur on the surface of the aluminum alloy. With the increase of immersion time, the corrosion resistance of aluminum alloy in cutting fluid containing Pseudomonas alcaligenes continues to deteriorate, the breakdown potential continues to shift positively, and the tendency of pitting corrosion becomes more serious. Studies have shown that the corrosion current density of aluminum alloy immersed in bacterial cutting fluid for 15 days is 4.9 times higher than that of aluminum alloy immersed in sterile cutting fluid. With the increase of immersion time, the EIS impedance arc also continues to decrease. During the immersion of aluminum alloy in cutting fluid containing Pseudomonas alcaligenes, a biofilm appears on the surface. The bacteria on the biofilm continuously consume the oxygen on the surface of the material. The aluminum alloy cannot maintain a complete passivation film, so that the substrate is continuously exposed to the corrosive medium. Pitting corrosion occurred in the aluminum alloy under the biofilm, and the pitting corrosion became more severe with the increase of immersion time.

[0004] As bactericides, organic guanidine compounds are mainly used in the fields of cosmetics, beverages, environmental disinfection, detergents, etc., and there are few studies on their bactericidal applications in water-based cutting fluids. Guanidine compounds basically do not produce target-target specific binding with bacteria, but achieve the ultimate bactericidal purpose through electrostatic attraction with the cell membrane. Therefore, they are not easy to develop drug resistance. In addition, compared with the same positively charged amine group, the guanidine group can be ionized in a wider pH range. The guanidine group binds to the cell membrane in the form of a double hydrogen bond, and its binding to the cell membrane is more firm and its antibacterial property is stronger.

[0005] Based on the above situation, the present invention proposes a cutting fluid for aluminum alloy and a preparation method thereof. The antibacterial agent contained in the cutting fluid has a special inhibitory effect on Pseudomonas alcaligenes. Summary of the invention

[0006] The object of the present invention is to provide a cutting fluid for aluminum alloy and a preparation method thereof.

[0007] To achieve the above-mentioned purpose, the present invention provides a cutting fluid for aluminum alloy, which is composed of the following raw materials in weight percentage: 20-25wt% of plant base oil, 10-14wt% of pH buffer, 4-6wt% of lubricant, 2-4wt% of rust inhibitor, 2-3wt% of coupling agent, 0.5-1.0wt% of defoaming agent, 0.8-1.5wt% of corrosion inhibitor, 6-10wt% of emulsifier, 1-3wt% of antibacterial agent, and the balance is deionized water.

[0008] Preferably, the plant base oil is epoxidized soybean oil, the epoxide value of which is greater than 6.0% and the acid value is less than 0.5 mgKOH / g.

[0009] Preferably, the pH buffer comprises one of triethanolamine, 2-amino-2-methyl-1-propanol, N-methyldiethanolamine, and butylethanolamine.

[0010] Preferably, the lubricant comprises one of trans-polyether, fatty acid and fatty acid ester.

[0011] Preferably, the rust inhibitor comprises one or a combination of two or more of suberic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, tridecanedioic acid or tetradecanedioic acid.

[0012] Preferably, the coupling agent comprises one or two of isohexylene glycol, diethylene glycol monobutyl ether, dipropylene glycol methyl ether, phenoxyethanol, and a mixture of C14 and C15 single-branched primary alcohols.

[0013] Preferably, the defoaming agent is an aqueous silicone emulsion.

[0014] Preferably, the corrosion inhibitor includes one of sodium metasilicate pentahydrate, methyltrimethoxysilane, and hexamethylenetetramine.

[0015] Preferably, the emulsifier comprises one or a combination of two or more of tall oil, oleic acid, ricinoleic acid, dimer acid, and tetrameric ricinoleic acid ester.

[0016] Preferably, the antibacterial agent is an organic guanidine compound and a fluorine-containing baicalein sulfonylated derivative.

[0017] Preferably, the organic guanidine compound is prepared by the following method: hexamethylenediamine, guanidine hydrochloride and diethylenetriamine are mixed in a molar ratio of 1:1:0.05, heated in an oil bath to 150-160°C, reacted for 4 hours, and then 5-6 times the volume of the mixture with a 50% by mass fraction ethylene glycol aqueous solution is added, cooled and filtered to obtain the organic guanidine compound.

[0018] Preferably, the fluorine-containing baicalein sulfonylated derivative is 5-hydroxy-4-oxo-2-phenyl-4H-benzopyran-6,7-diylbis(3,5-bis(trifluoromethyl)benzenesulfonate), the chemical formula of which is C 31 H 14 F 12 O9S2.

[0019] Preferably, the fluorine-containing baicalein sulfonylated derivative is prepared by the following method: baicalein and 3,5-bistrifluoromethylbenzenesulfonyl chloride are mixed in a molar ratio of 1:2 to 3, and then a mixed solution of anhydrous acetone and pyridine is added at a mixed substance liquid ratio of 1g:12ml, wherein the volume ratio of anhydrous acetone to pyridine is 5:1, and the reaction is stirred in an ice bath under nitrogen protection for 1h. After the reaction is completed, ice water 3 times the volume of the reaction solution is added, and the solid is allowed to stand to precipitate, filtered, and the filter cake is rinsed with ice ethanol, and then subjected to silica gel column chromatography, and eluted with dichloromethane as an eluent to obtain the product.

[0020] The present invention also provides a method for preparing a cutting fluid for aluminum alloy, the preparation method comprising the following steps:

[0021] (1) Mixing the vegetable base oil and the emulsifier, stirring and mixing at 500-550 rpm for 5-10 min, then adding an equal volume of deionized water, stirring and mixing at 950-1000 rpm for 25-30 min, to obtain a first mixed solution;

[0022] (2) mixing an organic guanidine compound and a fluorinated baicalein sulfonyl derivative, adding deionized water at a mass-to-liquid ratio of 1 g: 2-3 ml, stirring and mixing at 500-550 rpm for 5-10 minutes to obtain an antibacterial agent;

[0023] (3) The first mixed solution is continuously stirred at 750-800 rpm at 50-55° C., and then a pH buffer, a lubricant, a rust inhibitor, a coupling agent, a defoaming agent, a corrosion inhibitor, and an antibacterial agent are sequentially added to the first mixed solution. After all components are added, stirring is continued for 10-15 minutes, and the mixture is allowed to stand at 20-25° C. for 24 hours, and insoluble matter is filtered out to obtain the mixture.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The bactericidal mechanism of the organic guanidine compound of the present invention is as follows: the functional groups of the organic guanidine polymer molecules are positively charged, while bacteria and virus cells in water mostly carry negative charges. After being adsorbed on the surface of microorganisms, the organic guanidine inhibits the division of bacteria and viruses, causing them to lose their reproductive ability, thereby playing an inhibitory and bactericidal role; and the fluorine-containing baicalein sulfonylated derivative has a special binding site with Pseudomonas alcaligenes, thereby having a good inhibitory and killing effect on it.

[0026] 2. The present invention adds a fluorine-containing sulfonylated baicalein derivative, which has a synergistic effect with the organic guanidine compound on the reproduction inhibition and killing of Pseudomonas alcaligenes, thereby effectively reducing the impact of Pseudomonas alcaligenes corrosion on aluminum alloys.

[0027] 3. The raw materials of the present invention are sufficient in China and are of suitable price, so that there is no high cost restriction for large-scale production; at the same time, the cutting fluid for aluminum alloy is simple and the overall production cost is not high, which is conducive to large-scale industrial production.

[0028] Description of the drawings

[0029] 1. Figure 1 The chemical structural formula is 5-hydroxy-4-oxo-2-phenyl-4H-benzopyran-6,7-diylbis(3,5-bis(trifluoromethyl)benzenesulfonate);

[0030] 2. Figure 2 It is the chemical structural formula of 5-hydroxy-4-oxo-2-phenyl-4H-benzopyran-6,7-diacylbis(propane-1-sulfonate). DETAILED DESCRIPTION

[0031] Example 1

[0032] Weigh the specific raw materials according to Table 1. The preparation steps are as follows:

[0033] (1) Hexamethylenediamine, guanidine hydrochloride and diethylenetriamine were mixed in a molar ratio of 1:1:0.05, heated in an oil bath to 150°C, reacted for 4 hours, then 5 to 5 times the volume of the mixture with a 50% by mass ethylene glycol aqueous solution was added, cooled and filtered to obtain an organic guanidine compound;

[0034] (2) Baicalein and 3,5-bis(trifluoromethyl)benzenesulfonyl chloride were mixed in a molar ratio of 1:2, and then a mixed solution of anhydrous acetone and pyridine was added at a mixed material liquid ratio of 1g:12ml, wherein the volume ratio of anhydrous acetone to pyridine was 5:1, and the mixture was stirred in an ice bath under nitrogen protection for 1 hour. After the reaction, ice water 3 times the volume of the reaction solution was added, and the mixture was allowed to stand to allow solid precipitation, and the mixture was filtered, and the filter cake was rinsed with ice ethanol, and then subjected to silica gel column chromatography, and eluted with dichloromethane as an eluent to obtain a fluorinated baicalein sulfonylated derivative;

[0035] (3) mixing the organic guanidine compound and the fluorinated baicalein sulfonyl derivative, adding deionized water at a mass-liquid ratio of 1 g:2 ml, stirring at 500 rpm for 10 min, and obtaining an antibacterial agent;

[0036] (4) mixing the vegetable base oil and the emulsifier, stirring and mixing at 500 rpm for 10 min, then adding an equal volume of deionized water, stirring and mixing at 950 rpm for 30 min, to obtain a first mixed solution;

[0037] (5) The first mixed solution is continuously stirred at 750 rpm at 50° C., and then a pH buffer, a lubricant, a rust inhibitor, a coupling agent, a defoaming agent, a corrosion inhibitor, and an antibacterial agent are sequentially added to the first mixed solution. After all components are added, stirring is continued for 15 minutes, and the mixture is allowed to stand at 20-25° C. for 24 hours, and the insoluble matter is filtered out to obtain the mixture.

[0038] Example 2

[0039] Weigh the specific raw materials according to Table 1. The preparation steps are as follows:

[0040] (1) Hexamethylenediamine, guanidine hydrochloride and diethylenetriamine were mixed in a molar ratio of 1:1:0.05, heated in an oil bath to 160°C, reacted for 4 hours, and then added with an aqueous solution containing 50% by mass of ethylene glycol in an amount 6 times the volume of the mixture, cooled and filtered to obtain an organic guanidine compound;

[0041] (2) Baicalein and 3,5-bis(trifluoromethyl)benzenesulfonyl chloride were mixed in a molar ratio of 1:3, and then a mixed solution of anhydrous acetone and pyridine was added at a mixed material liquid ratio of 1g:12ml, wherein the volume ratio of anhydrous acetone to pyridine was 5:1, and the mixture was stirred in an ice bath under nitrogen protection for 1 hour. After the reaction, ice water 3 times the volume of the reaction solution was added, and the mixture was allowed to stand to allow solid precipitation, and the mixture was filtered, and the filter cake was rinsed with ice ethanol and then subjected to silica gel column chromatography, and eluted with dichloromethane as an eluent to obtain a fluorinated baicalein sulfonylated derivative;

[0042] (3) mixing an organic guanidine compound and a fluorinated baicalein sulfonyl derivative, adding deionized water at a mass-to-liquid ratio of 1 g:3 ml, stirring at 550 rpm for 5 min, and obtaining an antibacterial agent;

[0043] (4) mixing the vegetable base oil and the emulsifier, stirring at 550 rpm for 5 min, then adding an equal volume of deionized water, stirring at 1000 rpm for 25 min, to obtain a first mixed solution;

[0044] (5) The first mixed solution is continuously stirred at 800 rpm at 55° C., and then a pH buffer, a lubricant, a rust inhibitor, a coupling agent, a defoaming agent, a corrosion inhibitor, and an antibacterial agent are sequentially added to the first mixed solution. After all components are added, stirring is continued for 10 minutes, and the mixture is allowed to stand at 20-25° C. for 24 hours, and the insoluble matter is filtered out to obtain the mixture.

[0045] Example 3

[0046] Weigh the specific raw materials according to Table 1. The preparation steps are as follows:

[0047] (1) Hexamethylenediamine, guanidine hydrochloride and diethylenetriamine were mixed in a molar ratio of 1:1:0.05, heated in an oil bath to 160°C, reacted for 4 hours, and then added with an aqueous solution containing 50% by mass of ethylene glycol in an amount 6 times the volume of the mixture, cooled and filtered to obtain an organic guanidine compound;

[0048] (2) Baicalein and 3,5-bis(trifluoromethyl)benzenesulfonyl chloride were mixed in a molar ratio of 1:3, and then a mixed solution of anhydrous acetone and pyridine was added at a mixed material liquid ratio of 1g:12ml, wherein the volume ratio of anhydrous acetone to pyridine was 5:1, and the mixture was stirred in an ice bath under nitrogen protection for 1 hour. After the reaction, ice water 3 times the volume of the reaction solution was added, and the mixture was allowed to stand to allow solid precipitation, and the mixture was filtered, and the filter cake was rinsed with ice ethanol and then subjected to silica gel column chromatography, and eluted with dichloromethane as an eluent to obtain a fluorinated baicalein sulfonylated derivative;

[0049] (3) mixing the organic guanidine compound and the fluorinated baicalein sulfonyl derivative, adding deionized water at a mass-to-liquid ratio of 1 g:3 ml, stirring at 550 rpm for 10 min, and obtaining an antibacterial agent;

[0050] (4) mixing the vegetable base oil and the emulsifier, stirring and mixing at 550 rpm for 10 min, then adding an equal volume of deionized water, stirring and mixing at 1000 rpm for 30 min to obtain a first mixed solution;

[0051] (5) The first mixed solution is continuously stirred at 800 rpm at 55° C., and then a pH buffer, a lubricant, a rust inhibitor, a coupling agent, a defoaming agent, a corrosion inhibitor, and an antibacterial agent are sequentially added to the first mixed solution. After all components are added, stirring is continued for 15 minutes, and the mixture is allowed to stand at 20-25° C. for 24 hours, and the insoluble matter is filtered out to obtain the mixture.

[0052] Comparative Example 1

[0053] Specific raw materials were weighed according to Table 1. Different from Example 3, the fluorine-containing baicalein sulfonylated derivative was not prepared. The remaining preparation steps were the same as Example 3.

[0054] Comparative Example 2

[0055] Specific raw materials were weighed according to Table 1. Different from Example 3, no organic guanidine compound was prepared. The remaining preparation steps were the same as Example 3.

[0056] Comparative Example 3

[0057] The specific raw materials were weighed according to Table 1. The difference from Example 3 was that baicalein was used instead of the fluorine-containing baicalein sulfonylated derivative. The remaining steps were the same as those in Example 3.

[0058] Comparative Example 4

[0059] The specific raw materials were weighed according to Table 1. The difference from Example 3 was that the fluorine-containing baicalein sulfonylated derivative was replaced by a fluorine-free alkane-substituted baicalein sulfonylated derivative. The fluorine-free alkane-substituted baicalein sulfonylated derivative was 5-hydroxy-4-oxo-2-phenyl-4H-benzopyran-6,7-diacylbis(propane-1-sulfonate), with a chemical formula of C 21 H 22 O9S2, prepared by replacing 3,5-bis(trifluoromethyl)benzenesulfonyl chloride with propane-1-sulfonyl chloride. The remaining steps are the same as those in Example 3.

[0060] Table 1 Recipe

[0061]

[0062]

[0063] Performance Evaluation

[0064] Colony count test: The cutting fluids prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were sterilized in a high pressure steam sterilizer. 4 CFU / mL, it was added to sterile cutting fluid at a ratio of 1%, placed in a constant temperature shaker at 37°C for 15 days, and the number of bacterial colonies in the cutting fluid was determined using LB broth plates. The specific results are shown in Table 2.

[0065] Take 7075 aluminum alloy and soak it in the sterilized cutting fluids prepared in Examples 1 to 3 and Comparative Examples 1 to 4, and then inoculate Pseudomonas alcaligenes according to the above method. After soaking for 14 days, perform electrochemical testing. Electrochemical test: A three-electrode electrochemical workstation is used to test the electrochemical behavior of aluminum alloy in cutting fluid, in which the packaged 7075 aluminum alloy is the working electrode, the platinum sheet is the counter electrode, and the saturated calomel electrode is the reference electrode (SCE). A certain volume of the above-mentioned bacterial cutting fluid contaminated with Pseudomonas alcaligenes is used as the electrolyte. Before the electrochemical test, the working electrode is immersed in the electrolyte for more than 1 hour until the open circuit potential (OCP) is stable. The electrochemical impedance spectroscopy (EIS) is used to characterize the electrochemical state of the working electrode surface interface. The test frequency is 10 –2 ~10 4Hz, the disturbance amplitude was ±10mV, and the test results were fitted by EIS using Zsim software. In addition, the working electrode was subjected to a potentiodynamic polarization curve test, with a potential scanning range of stable OCP ±2.5V and a scanning rate of 5mV / s. The specific results are shown in Table 2.

[0066] Table 2

[0067] CFU / mL <![CDATA[J corr (μA / cm 2 )]]> Example 1 <![CDATA[6.8×10 2 ]]> 0.102 Example 2 <![CDATA[5.2×10 2 ]]> 0.096 Example 3 <![CDATA[3.6×10 2 ]]> 0.085 Comparative Example 1 <![CDATA[7.5×10 6 ]]> 0.346 Comparative Example 2 <![CDATA[8.4×10 6 ]]> 0.372 Comparative Example 3 <![CDATA[6.4×10 8 ]]> 0.523 Comparative Example 4 <![CDATA[4.3×10 7 ]]> 0.458

[0068] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A cutting fluid for aluminum alloy, characterized in that: The aluminum alloy cutting fluid is composed of the following raw materials in percentage by weight: 20-25 wt% of epoxy soybean oil with an epoxy value greater than 6.0% and an acid value less than 0.5 mgKOH / g, 10-14 wt% of triethanolamine, 4-6 wt% of fatty acid ester, 2-4 wt% of sebacic acid, 2-3 wt% of diethylene glycol monobutyl ether, 0.5-1.0 wt% of aqueous organic silicone emulsion, and 0.8-1.5 wt% of sodium metasilicate pentahydrate. , 6-10wt% ricinoleic acid, 1-3wt% antibacterial agent, wherein the antibacterial agent is 0.6-1.8wt% of an organic guanidine compound and 0.4-1.2wt% of a fluorinated baicalein sulfonate derivative, and the remainder is deionized water; the fluorinated baicalein sulfonate derivative is 5-hydroxy-4-oxo-2-phenyl-4H-benzopyran-6,7-diylbis(3,5-bis(trifluoromethyl)benzenesulfonate), the chemical formula of which is C 31 H 14 F 12 O9S2; The fluorine-containing baicalein sulfonylated derivative is prepared by the following method: baicalein and 3,5-bistrifluoromethylbenzenesulfonyl chloride are mixed in a molar ratio of 1:2-3, and then a mixed solution of anhydrous acetone and pyridine is added at a mixed material liquid ratio of 1g:12ml, wherein the volume ratio of anhydrous acetone to pyridine is 5:1, and the reaction is stirred in an ice bath under nitrogen protection for 1h. After the reaction is completed, ice water 3 times the volume of the reaction solution is added, and the solid is allowed to stand to precipitate, filtered, and the filter cake is rinsed with ice ethanol, and then subjected to silica gel column chromatography and eluted with dichloromethane as an eluent to obtain the product.

2. The aluminum alloy cutting fluid according to claim 1, characterized in that: The organic guanidine compound is prepared by the following method: hexamethylenediamine, guanidine hydrochloride and diethylenetriamine are mixed in a molar ratio of 1:1:0.05, heated in an oil bath to 150-160° C., reacted for 4 hours, then 5-6 times the volume of the mixture with a 50% by mass ethylene glycol aqueous solution is added, cooled and filtered to obtain the organic guanidine compound.

3. A method for preparing the aluminum alloy cutting fluid according to any one of claims 1 to 2, the preparation method comprising the following steps: (1) Mixing the vegetable base oil and the emulsifier, stirring and mixing at 500-550 rpm for 5-10 min, then adding an equal volume of deionized water, stirring and mixing at 950-1000 rpm for 25-30 min, to obtain a first mixed solution; (2) mixing an organic guanidine compound and a fluorinated baicalein sulfonyl derivative, adding deionized water at a mass-to-liquid ratio of 1 g: 2-3 ml, stirring and mixing at 500-550 rpm for 5-10 minutes to obtain an antibacterial agent; (3) The first mixed solution is continuously stirred at 750-800 rpm at 50-55° C., and then a pH buffer, a lubricant, a rust inhibitor, a coupling agent, a defoaming agent, a corrosion inhibitor, and an antibacterial agent are sequentially added to the first mixed solution. After all components are added, stirring is continued for 10-15 minutes, and the mixture is allowed to stand at 20-25° C. for 24 hours, and insoluble matter is filtered out to obtain the mixture.

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