Electromagnetic rheological copper and aluminum rolling oil, preparation method and application thereof

Abstract

The present application discloses an electromagnetic rheological copper-aluminum rolling oil and its preparation method and application, which relate to the field of lubricant technology. The electromagnetic rheological copper-aluminum rolling oil comprises titanium dioxide-coated cobalt ferrite, base oil and additives. First, the titanium dioxide-coated cobalt ferrite is prepared, and then added to the base oil, and then a surfactant, an extreme pressure agent and an antioxidant are added to the base oil, and the electromagnetic rheological copper-aluminum rolling oil is prepared after mixing and stirring. The electromagnetic rheological copper-aluminum rolling oil has both good electrorheological properties and magnetorheological properties, and has good suspension stability; it can also adjust its oil film thickness, viscosity and shear stress by changing the parameters of the electromagnetic field, thereby reducing the slippage and scratching problems during the rolling process and achieving the effect of intelligent cleaning; the electromagnetic rheological copper-aluminum rolling oil can be used for the rolling of copper, aluminum and their alloys.

Description

Technical Field

[0001] The present application relates to the technical field of lubricants, and specifically to an electromagnetic rheological copper and aluminum rolling oil, a preparation method thereof, and an application thereof. Background Art

[0002] With the rapid development of the metal processing industry, the level of rolling mills and user requirements are constantly improving, which has led to a significant increase in people's requirements for metal material quality, especially the quality of metal material surfaces. During the metal material processing process, if effective lubrication is implemented in the process, it can significantly improve the surface quality of the metal material, extend the service life of the rolls, and reduce the power consumption during the metal material rolling process.

[0003] During the rolling process of metal materials, rolling oil not only plays a lubricating role, but also has cooling, load-bearing and cleaning functions. It can significantly improve the friction interface conditions in the roll gap area and reduce rolling forces, thereby reducing roll wear and improving the surface quality of metal materials.

[0004] Chinese patent application publication number CN 108251200A discloses a clean cold rolling oil for copper-aluminum composite plates and its preparation method. The cold rolling oil's components are as follows: 89.5% to 90.65% mineral oils D85, D100, and D115 as base oils; 0.3% to 0.8% extreme pressure agents including dialkyl dithiophosphates, fatty alcohol polyethylene glycol esters, and acidic dibutyl phosphite; 9.0% to 9.6% oiliness agents including lauric acid, lauryl alcohol, and butyl stearate; and 0.05% to 0.1% corrosion inhibitor, dithiothiadiazole. This invention uses common aluminum rolling oil, adds phosphorus-based and alcohol ester extreme pressure anti-wear agents, which can effectively improve the rolling oil film strength, and uses lauryl alcohol, lauric acid and butyl stearate as composite oiliness agents to effectively ensure the stability of the rolling oil's friction reduction ability. At the same time, a small amount of dithiothiadiazole is added as a corrosion inhibitor to prevent oxidation of the copper substrate surface; the prepared rolling oil has extreme pressure anti-wear, corrosion resistance and surface cleanliness.

[0005] However, conventional rolling oils still face various problems during use, such as slipping, scratching, and poor cleaning and oil removal effects. Therefore, the application of conventional rolling oils still requires multi-faceted exploration and improvement. Summary of the Invention

[0006] In response to the deficiencies of the prior art, the present application provides an electromagnetic rheological copper-aluminum rolling oil, and a preparation method and application thereof. The electromagnetic rheological copper-aluminum rolling oil is applied to a copper-aluminum rolling system; the copper-aluminum rolling system includes: an electromagnetic field controller, a controllable electromagnetic field, a rolling roller, a metal material, and electromagnetic rheological copper-aluminum rolling oil. The electromagnetic rheological copper-aluminum rolling oil is prepared by coating titanium dioxide on cobalt ferrite, and then adding it as an important component to the base oil, and further adding an additive to the base oil so that the titanium dioxide-coated cobalt ferrite is fully dispersed in the base oil; thereby, an electromagnetic rheological copper-aluminum rolling oil having both good electrorheological and magnetorheological properties and good suspension stability is obtained, which can be used for the rolling of copper, aluminum and their alloys, and can solve the problems of slipping, scratching, and poor cleaning and oil removal during the copper-aluminum rolling process.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions:

[0008] In a first aspect, the present application provides an electromagnetic rheological copper and aluminum rolling oil, comprising titanium dioxide-coated cobalt ferrite, base oil, and additives; the additives include a surfactant, an extreme pressure agent, and an antioxidant.

[0009] In a second aspect, the present application provides a method for preparing electromagnetic rheological copper and aluminum rolling oil, the preparation method comprising:

[0010] First, titanium dioxide-coated cobalt ferrite is prepared;

[0011] It is then added to the base oil, to which surfactants, extreme pressure agents, and antioxidants are subsequently added;

[0012] Finally, the mixture is stirred for 1 to 2 hours to obtain the electromagnetic rheological copper and aluminum rolling oil.

[0013] In a third aspect, the present application provides an application of the electromagnetic rheological copper-aluminum rolling oil, wherein the electromagnetic rheological copper-aluminum rolling oil is applied to a copper-aluminum rolling system; the copper-aluminum rolling system comprises:

[0014] An electromagnetic field controller, an electromagnetic field generator, a pair of oppositely disposed rolls, copper and aluminum metal materials, copper and aluminum rolled products, and electromagnetic rheological copper and aluminum rolling oil;

[0015] The electromagnetic field controller is electrically connected to the electromagnetic field generator and is used to adjust the properties of the electromagnetic field formed by the electromagnetic field generator; a pair of rollers are arranged in the electromagnetic field, and the copper and aluminum metal materials to be rolled are placed in the rear sliding area of the rollers, and the front sliding area of the rollers forms the rolled copper and aluminum rolled products, wherein the surface of the copper and aluminum metal materials is coated with the electromagnetic rheological copper and aluminum rolling oil.

[0016] Beneficial technical effects:

[0017] Electromagnetic rheological copper and aluminum rolling oil is used in the rolling process of copper, aluminum and their alloys. Due to its electromagnetic rheological properties, it can adjust the oil film thickness, viscosity and shear stress by changing the parameters of the electromagnetic field, thereby reducing slippage and scratching problems during the rolling process; and it can achieve the effect of intelligent cleaning by removing the electromagnetic field and reducing its viscosity.

[0018] The titanium dioxide coated on the surface of cobalt ferrite has a high dielectric constant, which means that titanium dioxide can form stronger polarization in an electric field, thereby enhancing the electrorheological response of the entire liquid. Cobalt ferrite has a high saturation magnetization, so it can quickly and significantly change its magnetic state under the action of an external magnetic field. At the same time, it also has low coercive force and hysteresis loss, which makes it lose less energy during magnetization and demagnetization, which is conducive to improving the magnetorheological properties of the entire liquid. Therefore, whether under an electric field or a magnetic field, the titanium dioxide-coated cobalt ferrite will respond.

[0019] Titanium dioxide-coated cobalt ferrite is added to the base oil as an important component, and an additive is further added to the base oil to fully disperse the titanium dioxide-coated cobalt ferrite in the base oil; thereby obtaining an electromagnetic rheological copper and aluminum rolling oil that has both good electrorheological and magnetorheological properties and good suspension stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the components of the electromagnetic rheological copper and aluminum rolling oil.

[0021] Figure 2 It is a schematic diagram of the process for preparing the electromagnetic rheological copper and aluminum rolling oil.

[0022] Figure 3 is a schematic diagram of the copper and aluminum rolling system.

[0023] Meaning of the reference numerals:

[0024] 1. Electromagnetic field controller; 2. Electromagnetic field generator; 3. A pair of oppositely arranged rollers; 4. Copper and aluminum metal materials; 5. Copper and aluminum rolled products; 6. Electromagnetic rheological copper and aluminum rolling oil. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the following embodiments. However, this should not be understood to limit the scope of this application to the following examples. Without departing from the above-mentioned method concept of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] In this application, the terms used in this application are for the purpose of describing specific embodiments only and are not intended to be limiting of the application.

[0027] As used in this application and the appended claims, the singular forms "for," "or," "an," "any," and "said" are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] In the first aspect, the present application provides an electromagnetic rheological copper and aluminum rolling oil, the components of which are as follows: Figure 1 As shown, it includes titanium dioxide-coated cobalt ferrite, base oil and additives; the additives include surfactants, extreme pressure agents and antioxidants.

[0029] In a possible implementation, the mass ratio of the titanium dioxide-coated cobalt ferrite, base oil, surfactant, extreme pressure agent, and antioxidant is (20-30): (50-70): (2-8): (0.5-2): (0.5-2).

[0030] In one possible implementation, the base oil includes one or more of Group II base oil, Group III base oil, and Group IV base oil.

[0031] In a possible implementation, the surfactant includes one or more of sodium lauryl sulfate, sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, glycerol fatty acid ester, polyoxyethylene glycerol ether, and polyoxyethylene oleate.

[0032] In a possible implementation, the extreme pressure agent includes one or more of triethyl phosphate, tricresyl phosphate, di-n-butyl phosphite, triethanolamine borate, and triisopropyl borate.

[0033] In a possible implementation, the antioxidant includes one or more of butylated hydroxytoluene, 2,6-di-tert-butylphenol, N,N'-diphenyl-p-phenylenediamine, and N-phenyl-1-naphthylamine.

[0034] In a second aspect, the present application provides a method for preparing electromagnetic rheological copper and aluminum rolling oil, such as Figure 2 As shown, the preparation method includes:

[0035] First, titanium dioxide-coated cobalt ferrite is prepared;

[0036] It is then added to the base oil, to which surfactants, extreme pressure agents, and antioxidants are subsequently added;

[0037] Finally, the mixture is stirred for 1 to 2 hours to obtain the electromagnetic rheological copper and aluminum rolling oil.

[0038] In a possible implementation, the method for preparing the electromagnetic rheological copper and aluminum rolling oil further includes a method for preparing titanium dioxide-coated cobalt ferrite; the method for preparing titanium dioxide-coated cobalt ferrite includes:

[0039] dissolving titanium alkoxide in organic solvent A to obtain a precursor solution;

[0040] Dispersing cobalt ferrite in an organic solvent B, and adding a surfactant C to B to obtain a cobalt ferrite suspension;

[0041] Then, the precursor solution is added dropwise to the cobalt ferrite suspension, and the mixture is refluxed and stirred at 100-150° C. for 8-12 hours to obtain a titanium dioxide-coated cobalt ferrite suspension;

[0042] Then, the suspension of titanium dioxide-coated cobalt ferrite was cooled to room temperature and filtered to obtain a preliminary product;

[0043] The preliminary product is then calcined at 400-500°C for 4-6 hours, cooled, discharged, and then washed;

[0044] Finally, the washed preliminary product is dried at 100-120° C. for 2-4 hours to obtain titanium dioxide-coated cobalt ferrite.

[0045] In a possible implementation, the mass ratio of the titanium alkoxide, the organic solvent A, the cobalt ferrite, the organic solvent B, and the surfactant C is (10-20): (30-40): (10-20): (30-40): (1-5).

[0046] In a possible implementation, the titanium alkoxide includes one or more of titanium tetraethoxide and titanium tetraisopropoxide.

[0047] In a possible implementation, the organic solvent A includes one or more of ethanol, propanol, and isopropanol.

[0048] In a possible implementation, the organic solvent B includes one or more of ethanol, propanol, and isopropanol.

[0049] In a possible implementation, the surfactant C includes one or more of dodecyldimethylbenzylammonium chloride, hexadecyltrimethylammonium chloride, and octadecyltrimethylammonium chloride.

[0050] In a third aspect, the present application provides an application of the electromagnetic rheological copper-aluminum rolling oil, wherein the electromagnetic rheological copper-aluminum rolling oil is applied to a copper-aluminum rolling system; the copper-aluminum rolling system is as follows: Figure 3 Shown, including:

[0051] An electromagnetic field controller 1, an electromagnetic field generator 2, a pair of oppositely disposed rollers 3, copper and aluminum metal materials 4, copper and aluminum rolled products 5, and electromagnetic rheological copper and aluminum rolling oil 6;

[0052] In one possible implementation, the electromagnetic field controller 1 is electrically connected to the electromagnetic field generator 2, and is used to adjust the properties of the electromagnetic field formed by the electromagnetic field generator; a pair of rolling rollers 3 are arranged in the electromagnetic field, and the copper-aluminum metal material 4 to be rolled is placed in the rear sliding area of the rolling rollers, and the front sliding area of the rolling rollers forms the rolled copper-aluminum rolled product 5, wherein the surface of the copper-aluminum metal material is coated with the electromagnetic rheological copper-aluminum rolling oil 6.

[0053] The experimental raw materials used in this application come from the following sources:

[0054] Organic solvent: Jiangsu Runfeng Synthetic Technology Co., Ltd.;

[0055] Titanium alkoxide: Jiangsu Bosite Chemical Technology Co., Ltd.

[0056] Cobalt ferrite: Shanghai MacLean Biochemical Technology Co., Ltd.

[0057] Surfactant C: Jiangsu Bosite Chemical Technology Co., Ltd.;

[0058] Base oil: Jiangsu Runfeng Synthetic Technology Co., Ltd.

[0059] Surfactant: Shanghai MacLean Biochemical Technology Co., Ltd.;

[0060] Extreme pressure agent: Shanghai MacLean Biochemical Technology Co., Ltd.;

[0061] Antioxidants: Shanghai MacLean Biochemical Technology Co., Ltd.;

[0062] Aluminum isopropoxide: Shanghai MacLean Biochemical Technology Co., Ltd.;

[0063] Alumina: Shanghai MacLean Biochemical Technology Co., Ltd.;

[0064] Magnesium nitrate: Shanghai MacLean Biochemical Technology Co., Ltd.;

[0065] Magnesium oxide: Shanghai MacLean Biochemical Technology Co., Ltd.

[0066] The following will describe in detail an electromagnetic rheological copper and aluminum rolling oil provided by this application, its preparation method and application, in combination with different examples.

[0067] Example 1:

[0068] like Figure 2 As shown, a preparation method and application of electromagnetic rheological copper and aluminum rolling oil, comprising:

[0069] 1. Dissolve titanium tetraethoxide in isopropanol to obtain a precursor solution;

[0070] 2. Dispersing cobalt ferrite in ethanol, and adding dodecyldimethylbenzyl ammonium chloride to the ethanol to obtain a cobalt ferrite suspension;

[0071] 3. Then, the precursor solution was added dropwise to the cobalt ferrite suspension, and the mixture was refluxed and stirred at 100° C. for 8 hours to obtain a suspension of titanium dioxide-coated cobalt ferrite;

[0072] 4. Then cool the suspension of titanium dioxide-coated cobalt ferrite to room temperature and filter to obtain a preliminary product;

[0073] 5. The preliminary product is then calcined at 400°C for 6 hours, cooled, discharged, and washed;

[0074] 6. Finally, the preliminary product was dried at 100°C for 2 hours to obtain titanium dioxide-coated cobalt ferrite;

[0075] In the above steps 1 to 6, the mass ratio of titanium tetraethoxide, isopropyl alcohol, cobalt ferrite, ethanol, and dodecyldimethylbenzylammonium chloride is 10:30:15:30:5.

[0076] 7. Add the prepared titanium dioxide-coated cobalt ferrite to the Group II base oil, and then add sodium lauryl sulfate, triethyl phosphate, and butylated hydroxytoluene to the Group II base oil;

[0077] 8. Then, the mixture was mixed and stirred for 2 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0078] In the above steps 7 to 8, the mass ratio of the titanium dioxide-coated cobalt ferrite, Group II base oil, sodium lauryl sulfate, triethyl phosphate, and butylated hydroxytoluene is 27:66:4:1:2.

[0079] Application of the electromagnetic rheological copper and aluminum rolling oil prepared in Example 1:

[0080] Before metal rolling, rolling oil is applied to copper and aluminum metal materials by spraying;

[0081] Then, during the rolling process, the rheological properties of the copper-aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0082] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0083] Example 2:

[0084] like Figure 2 As shown, a preparation method and application of electromagnetic rheological copper and aluminum rolling oil, comprising:

[0085] 1. Dissolve titanium tetraisopropoxide in propanol to obtain a precursor solution;

[0086] 2. Dispersing cobalt ferrite in isopropyl alcohol and adding hexadecyltrimethylammonium chloride to obtain a cobalt ferrite suspension;

[0087] 3. Then, the precursor solution was added dropwise to the cobalt ferrite suspension, and refluxed and stirred at 250° C. for 12 hours to obtain a suspension of titanium dioxide-coated cobalt ferrite;

[0088] 4. Then cool the suspension of titanium dioxide-coated cobalt ferrite to room temperature and filter to obtain a preliminary product;

[0089] 5. The preliminary product is then calcined at 500°C for 4 hours, cooled, discharged, and washed;

[0090] 6. Finally, the preliminary product was dried at 120° C. for 4 hours to obtain titanium dioxide-coated cobalt ferrite;

[0091] In the above steps 1 to 6, the mass ratio of titanium tetraisopropoxide, propanol, cobalt ferrite, isopropanol, and hexadecyltrimethylammonium chloride is 12:35:15:35:3.

[0092] 7. Add the prepared titanium dioxide-coated cobalt ferrite to Group III base oil, and then add sodium dodecylbenzenesulfonate, di-n-butyl phosphite, and 2,6-di-tert-butylphenol to the Group III base oil;

[0093] 8. Then, the mixture was mixed and stirred for 1 hour to obtain electromagnetic rheological copper and aluminum rolling oil;

[0094] In steps 7 to 8 above, the mass ratio of the titanium dioxide-coated cobalt ferrite, Group III base oil, sodium dodecylbenzenesulfonate, di-n-butyl phosphite, and 2,6-di-tert-butylphenol is 28:60:8:2:2.

[0095] Application of the electromagnetic rheological copper and aluminum rolling oil prepared in Example 2:

[0096] Before metal rolling, rolling oil is applied to copper and aluminum metal materials by brushing;

[0097] Then, during the rolling process, the rheological properties of the copper-aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0098] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0099] Example 3:

[0100] like Figure 2As shown, a preparation method and application of electromagnetic rheological copper and aluminum rolling oil, comprising:

[0101] 1. Dissolve titanium tetraethoxide in ethanol to obtain a precursor solution;

[0102] 2. Dispersing cobalt ferrite in ethanol and adding octadecyltrimethylammonium chloride thereto to obtain a cobalt ferrite suspension;

[0103] 3. Then, the precursor solution was added dropwise to the cobalt ferrite suspension, and refluxed and stirred at 220° C. for 10 hours to obtain a suspension of titanium dioxide-coated cobalt ferrite;

[0104] 4. Then cool the suspension of titanium dioxide-coated cobalt ferrite to room temperature and filter to obtain a preliminary product;

[0105] 5. The preliminary product is then calcined at 450°C for 5 hours, cooled, discharged, and washed;

[0106] 6. Finally, the preliminary product was dried at 110° C. for 3 hours to obtain titanium dioxide-coated cobalt ferrite;

[0107] In the above steps 1 to 6, the mass ratio of titanium tetraethoxide, ethanol, cobalt ferrite, ethanol, and octadecyltrimethylammonium chloride is 12:30:18:38:2.

[0108] 7. Add the prepared titanium dioxide-coated cobalt ferrite to the Group IV base oil, and then add sodium alkylnaphthalene sulfonate, triethanolamine borate, and N,N'-diphenyl-p-phenylenediamine to the Group IV base oil;

[0109] 8. Then, the mixture was mixed and stirred for 1.5 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0110] In the above steps 7 to 8, the mass ratio of the titanium dioxide-coated cobalt ferrite, Group IV base oil, sodium alkylnaphthalenesulfonate, triethanolamine borate, and N,N'-diphenyl-p-phenylenediamine is 23:70:5:1:1.

[0111] Application of the electromagnetic rheological copper and aluminum rolling oil prepared in Example 3:

[0112] Before metal rolling, rolling oil is applied to copper and aluminum metal materials by immersion;

[0113] Then, during the rolling process, the rheological properties of the copper-aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0114] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0115] Example 4:

[0116] like Figure 2 As shown, a preparation method and application of electromagnetic rheological copper and aluminum rolling oil, comprising:

[0117] 1. Dissolve titanium tetraisopropoxide in isopropanol to obtain a precursor solution;

[0118] 2. Dispersing cobalt ferrite in isopropyl alcohol, and adding dodecyldimethylbenzyl ammonium chloride thereto to obtain a cobalt ferrite suspension;

[0119] 3. Then, the precursor solution was added dropwise to the cobalt ferrite suspension, and refluxed and stirred at 240° C. for 9 hours to obtain a suspension of titanium dioxide-coated cobalt ferrite;

[0120] 4. Then cool the suspension of titanium dioxide-coated cobalt ferrite to room temperature and filter to obtain a preliminary product;

[0121] 5. The preliminary product is then calcined at 400°C for 6 hours, cooled, discharged, and washed;

[0122] 6. Finally, the preliminary product was dried at 105°C for 2.5 hours to obtain titanium dioxide-coated cobalt ferrite;

[0123] In the above steps 1 to 6, the mass ratio of titanium tetraisopropoxide, isopropyl alcohol, cobalt ferrite, isopropyl alcohol, and dodecyldimethylbenzylammonium chloride is 14:30:20:35:1.

[0124] 7. Add the prepared titanium dioxide-coated cobalt ferrite to the Class II base oil, and then add glycerol fatty acid ester, tricresyl phosphate, and N-phenyl-1-naphthylamine to the Class II base oil;

[0125] 8. Then, the mixture was mixed and stirred for 1.5 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0126] In the above steps 7 to 8, the mass ratio of the titanium dioxide-coated cobalt ferrite, Group IV base oil, sodium alkylnaphthalenesulfonate, triethanolamine borate, and N,N'-diphenyl-p-phenylenediamine is 28:66:3:1.5:1.5.

[0127] Application of the electromagnetic rheological copper and aluminum rolling oil prepared in Example 4:

[0128] Before metal rolling, rolling oil is applied to copper and aluminum metal materials by spraying;

[0129] Then, during the rolling process, the rheological properties of the copper-aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0130] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0131] Example 5:

[0132] like Figure 2 As shown, a preparation method and application of electromagnetic rheological copper and aluminum rolling oil, comprising:

[0133] 1. Dissolve titanium tetraethoxide in ethanol to obtain a precursor solution;

[0134] 2. Dispersing cobalt ferrite in ethanol and adding hexadecyltrimethylammonium chloride thereto to obtain a cobalt ferrite suspension;

[0135] 3. Then, the precursor solution was added dropwise to the cobalt ferrite suspension, and refluxed and stirred at 230° C. for 11 hours to obtain a suspension of titanium dioxide-coated cobalt ferrite;

[0136] 4. Then cool the suspension of titanium dioxide-coated cobalt ferrite to room temperature and filter to obtain a preliminary product;

[0137] 5. The preliminary product is then calcined at 500°C for 4 hours, cooled, discharged, and washed;

[0138] 6. Finally, the preliminary product was dried at 115° C. for 3.5 hours to obtain titanium dioxide-coated cobalt ferrite;

[0139] In the above steps 1 to 6, the mass ratio of titanium tetraethoxide, ethanol, cobalt ferrite, ethanol, and hexadecyltrimethylammonium chloride is 13:35:20:30:2.

[0140] 7. Add the prepared titanium dioxide-coated cobalt ferrite to the Group III base oil, and then add polyoxyethylene glycerol ether, triisopropyl borate, and butylated hydroxytoluene to the Group III base oil;

[0141] 8. Then, the mixture was mixed and stirred for 1.2 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0142] In the above steps 7 to 8, the mass ratio of the titanium dioxide-coated cobalt ferrite, Group III base oil, polyoxyethylene glycerol ether, triisopropyl borate, and butylated hydroxytoluene is 26:66:6:1:1.

[0143] Application of the electromagnetic rheological copper and aluminum rolling oil prepared in Example 5:

[0144] Before metal rolling, rolling oil is applied to copper and aluminum metal materials by brushing;

[0145] Then, during the rolling process, the rheological properties of the copper-aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0146] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0147] Example 6:

[0148] like Figure 2 As shown, a preparation method and application of electromagnetic rheological copper and aluminum rolling oil, comprising:

[0149] 1. Dissolve titanium tetraisopropoxide in propanol to obtain a precursor solution;

[0150] 2. Dispersing cobalt ferrite in propanol and adding octadecyltrimethylammonium chloride thereto to obtain a cobalt ferrite suspension;

[0151] 3. Then, the precursor solution was added dropwise to the cobalt ferrite suspension, and refluxed and stirred at 210° C. for 8.5 hours to obtain a suspension of titanium dioxide-coated cobalt ferrite;

[0152] 4. Then cool the suspension of titanium dioxide-coated cobalt ferrite to room temperature and filter to obtain a preliminary product;

[0153] 5. The preliminary product is then calcined at 450°C for 5 hours, cooled, discharged, and washed;

[0154] 6. Finally, the preliminary product was dried at 108°C for 2.8 hours to obtain titanium dioxide-coated cobalt ferrite;

[0155] In the above steps 1 to 6, the mass ratio of titanium tetraisopropoxide, propanol, cobalt ferrite, propanol, and octadecyltrimethylammonium chloride is 15:32:18:32:3.

[0156] 7. Add the prepared titanium dioxide-coated cobalt ferrite to the Class IV base oil, and then add polyoxyethylene oleate, triethyl phosphate, and 2,6-di-tert-butylphenol to the Class IV base oil;

[0157] 8. Then, the mixture was mixed and stirred for 1.6 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0158] In the above steps 7 to 8, the mass ratio of the titanium dioxide-coated cobalt ferrite, Group IV base oil, polyoxyethylene oleate, triethyl phosphate, and 2,6-di-tert-butylphenol is 28:62:7:1:2.

[0159] Application of the electromagnetic rheological copper and aluminum rolling oil prepared in Example 6:

[0160] Before metal rolling, rolling oil is applied to copper and aluminum metal materials by immersion;

[0161] Then, during the rolling process, the rheological properties of the copper-aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0162] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0163] Comparative Example 1:

[0164] An electromagnetic rheological copper and aluminum rolling oil and a preparation method and application thereof, comprising:

[0165] 1. Dissolve magnesium nitrate in isopropanol to obtain a precursor solution;

[0166] 2. Dispersing alumina in ethanol, and adding dodecyldimethylbenzyl ammonium chloride to the ethanol to obtain an alumina suspension;

[0167] 3. Then, the precursor solution was added dropwise to the alumina suspension, and the mixture was refluxed and stirred at 200° C. for 8 hours to obtain a suspension of magnesium oxide-coated alumina;

[0168] 4. Then cool the suspension of magnesium oxide-coated aluminum oxide to room temperature and filter to obtain a preliminary product;

[0169] 5. The preliminary product is then calcined at 400°C for 6 hours, cooled, discharged, and washed;

[0170] 6. Finally, the preliminary product was dried at 100°C for 2 hours to obtain magnesium oxide-coated aluminum oxide;

[0171] In the above steps 1 to 6, the mass ratio of the magnesium nitrate, isopropyl alcohol, aluminum oxide, ethanol, and dodecyldimethylbenzyl ammonium chloride is 10:30:15:30:5.

[0172] 6. Add the prepared magnesium oxide-coated alumina to the Class II base oil, and then add sodium lauryl sulfate, triethyl phosphate, and butylated hydroxytoluene to the Class II base oil;

[0173] 8. Then, the mixture was mixed and stirred for 2 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0174] In the above steps 7 to 8, the mass ratio of the magnesium oxide-coated alumina, Group II base oil, sodium lauryl sulfate, triethyl phosphate, and butylated hydroxytoluene is 27:66:4:1:2.

[0175] Application of electromagnetic rheological copper and aluminum rolling oil prepared in Comparative Example 1:

[0176] Before metal rolling, electromagnetic rheological copper and aluminum rolling oil is applied to the copper and aluminum metal materials by spraying;

[0177] Then, during the rolling process, the rheological properties of the electromagnetic rheological copper and aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0178] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0179] Comparative Example 2:

[0180] An electromagnetic rheological copper and aluminum rolling oil and a preparation method and application thereof, comprising:

[0181] 1. Dissolve aluminum isopropoxide in ethanol to obtain a precursor solution;

[0182] 2. Dispersing silica in ethanol and adding octadecyltrimethylammonium chloride to obtain a silica suspension;

[0183] 3. Then, the precursor solution was added dropwise to the silica suspension, and refluxed and stirred at 220° C. for 10 hours to obtain a suspension of alumina-coated silica;

[0184] 4. The suspension of alumina-coated silica is then cooled to room temperature and filtered to obtain a preliminary product;

[0185] 5. The preliminary product is then calcined at 450°C for 5 hours, cooled, discharged, and washed;

[0186] 6. Finally, the preliminary product was dried at 110°C for 3 hours to obtain alumina-coated silica;

[0187] In the above steps 1 to 6, the mass ratio of the aluminum isopropoxide, ethanol, silicon dioxide, ethanol, and octadecyltrimethylammonium chloride is 12:30:18:38:2.

[0188] 6. Add the prepared alumina-coated silica to the Group IV base oil, and then add sodium alkylnaphthalene sulfonate, triethanolamine borate, and N,N'-diphenyl-p-phenylenediamine to the Group IV base oil;

[0189] 8. Then, the mixture was mixed and stirred for 1.5 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0190] In the above steps 7 to 8, the mass ratio of the alumina-coated silica, Group IV base oil, sodium alkylnaphthalenesulfonate, triethanolamine borate, and N,N'-diphenyl-p-phenylenediamine is 23:70:5:1:1.

[0191] Application of electromagnetic rheological copper and aluminum rolling oil prepared in Comparative Example 2:

[0192] Before metal rolling, electromagnetic rheological copper and aluminum rolling oil is applied to the copper and aluminum metal materials in an immersion manner;

[0193] Then, during the rolling process, the rheological properties of the electromagnetic rheological copper and aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0194] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0195] Comparative Example 3:

[0196] An electromagnetic rheological copper and aluminum rolling oil and a preparation method and application thereof, comprising:

[0197] 1. Dissolve aluminum isopropoxide in ethanol to obtain a precursor solution;

[0198] 2. Dispersing magnesium oxide in ethanol and adding hexadecyltrimethylammonium chloride thereto to obtain a magnesium oxide suspension;

[0199] 3. Then, the precursor solution was added dropwise to the magnesium oxide suspension, and refluxed and stirred at 230° C. for 11 hours to obtain a suspension of alumina-coated magnesium oxide;

[0200] 4. Then cool the suspension of alumina-coated magnesium oxide to room temperature and filter to obtain a preliminary product;

[0201] 5. The preliminary product is then calcined at 500°C for 4 hours, cooled, discharged, and washed;

[0202] 6. Finally, the preliminary product was dried at 115° C. for 3.5 hours to obtain alumina-coated magnesium oxide;

[0203] In the above steps 1 to 6, the mass ratio of the aluminum isopropoxide, ethanol, aluminum oxide, ethanol, and hexadecyltrimethylammonium chloride is 13:35:20:30:2.

[0204] 6. Add the prepared alumina-coated magnesium oxide to the Group III base oil, and then add polyoxyethylene glycerol ether, triisopropyl borate, and butylated hydroxytoluene to the Group III base oil;

[0205] 8. Then, the mixture was mixed and stirred for 1.2 hours to obtain electromagnetic rheological copper and aluminum rolling oil;

[0206] In the above steps 7 to 8, the mass ratio of the alumina-coated magnesium oxide, Group III base oil, polyoxyethylene glycerol ether, triisopropyl borate, and butylated hydroxytoluene is 26:66:6:1:1.

[0207] Application method of the copper and aluminum rolling oil prepared in Comparative Example 3:

[0208] Before metal rolling, electromagnetic rheological copper and aluminum rolling oil is applied to the copper and aluminum metal materials by brushing;

[0209] Then, during the rolling process, the rheological properties of the electromagnetic rheological copper and aluminum rolling oil are adjusted by controlling the intensity and direction of the magnetic field or electric field;

[0210] Finally, after use, the magnetic field or electric field is removed and the electromagnetic rheological copper and aluminum rolling oil is cleaned.

[0211] Referring to J / BT 12512-2015, at a shear rate ν of 51 / s and room temperature, the zero-field viscosity of the electromagnetic rheological copper-aluminum rolling oil was tested without applying a magnetic field or an electric field, as well as its shear stress under a uniform magnetic field of 0.5T at room temperature to reflect the magnetorheological properties of the electromagnetic rheological copper-aluminum rolling oil.

[0212] In addition, the shear stress of the electromagnetic rheological copper-aluminum rolling oil was tested at room temperature when the electric field strength was 5 kV / mm, so as to reflect the electrorheological properties of the electromagnetic rheological copper-aluminum rolling oil.

[0213] Table 1 Magnetorheological properties test results of electromagnetic rheological copper and aluminum rolling oils prepared in Examples and Comparative Examples

[0214]

[0215] As shown in Table 1, the zero-field viscosity of Examples 1-6 is lower than that of Comparative Examples 1-3, and the shear stress at a magnetic field strength of 0.5 T is higher than that of Comparative Examples 1-3. This is because titanium dioxide-coated cobalt ferrite is a key component in Examples 1-6; cobalt ferrite is the core particle, and cobalt ferrite has a high saturation magnetization, allowing it to rapidly and significantly change its magnetic state under the influence of an external magnetic field. It also has low coercive force and hysteresis loss, resulting in minimal energy loss during magnetization and demagnetization, which helps improve the overall magnetorheological properties of the liquid.

[0216] However, the solid dispersed phases used in Comparative Examples 1 to 3 do not contain cobalt ferrite, and therefore cannot change their own magnetic state under the action of an external magnetic field, and thus the shear stress under the magnetic field is very low.

[0217] Table 2 Electrorheological properties test results of electromagnetic rheological copper and aluminum rolling oils prepared in Examples and Comparative Examples

[0218]

[0219]

[0220] As shown in Table 2, the shear stress at an electric field strength of 5 kV / mm in Examples 1-6 is higher than that in Comparative Examples 1-3. This is because titanium dioxide-coated cobalt ferrite is a key component in Examples 1-6; titanium dioxide has a high dielectric constant, which means that titanium dioxide can form stronger polarization in an electric field, thereby enhancing the response of the electrorheological fluid.

[0221] However, the solid dispersed phases used in Comparative Examples 1 to 3 do not contain titanium dioxide, and therefore cannot form stronger polarization in the electric field, thereby enhancing the electrorheological response of the entire liquid, and thus the shear stress under the electric field is very low.

[0222] The above results show and describe the basic principles and main features of this application as well as the advantages of this application.

[0223] Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. Such changes and improvements are intended to fall within the scope of the present application. The scope of protection claimed in the present application is defined by the equivalents of the appended claims.

Claims

1. An electromagnetic rheological copper and aluminum rolling oil, characterized in that: The invention comprises titanium dioxide-coated cobalt ferrite, base oil and additives; the additives comprise a surfactant, an extreme pressure agent and an antioxidant; the mass ratio of the titanium dioxide-coated cobalt ferrite, base oil, surfactant, extreme pressure agent and antioxidant is (20-30): (50-70): (2-8): (0.5-2): (0.5-2); the preparation method of the titanium dioxide-coated cobalt ferrite comprises: dissolving titanium alkoxide in organic solvent A to obtain a precursor solution; Dispersing cobalt ferrite in an organic solvent B, and adding a surfactant C to B to obtain a cobalt ferrite suspension; Then, the precursor solution is added dropwise to the cobalt ferrite suspension, and the mixture is refluxed and stirred at 100-150° C. for 8-12 hours to obtain a titanium dioxide-coated cobalt ferrite suspension; Then, the suspension of titanium dioxide-coated cobalt ferrite was cooled to room temperature and filtered to obtain a preliminary product; The preliminary product is then calcined at 400-500°C for 4-6 hours, cooled, discharged, and then washed; Finally, the washed preliminary product is dried at 100-120°C for 2-4 hours to obtain titanium dioxide-coated cobalt ferrite; The mass ratio of the titanium alkoxide, organic solvent A, cobalt ferrite, organic solvent B, and surfactant C is (10-20): (30-40): (10-20): (30-40): (1-5); The titanium alkoxide includes one or more of titanium tetraethoxide and titanium tetraisopropoxide; the organic solvent A includes one or more of ethanol, propanol and isopropanol; the organic solvent B includes one or more of ethanol, propanol and isopropanol; the surfactant C includes one or more of dodecyldimethylbenzylammonium chloride, hexadecyltrimethylammonium chloride and octadecyltrimethylammonium chloride.

2. The electromagnetic rheological copper and aluminum rolling oil according to claim 1, characterized in that: The base oil includes one or more of Group II base oil, Group III base oil and Group IV base oil.

3. The electromagnetic rheological copper and aluminum rolling oil according to claim 1, characterized in that: The surfactant includes one or more of sodium lauryl sulfate, sodium dodecylbenzenesulfonate, sodium alkylnaphthalenesulfonate, glycerol fatty acid ester, polyoxyethylene glycerol ether and polyoxyethylene oleate.

4. The electromagnetic rheological copper and aluminum rolling oil according to claim 1, characterized in that: The extreme pressure agent includes one or more of triethyl phosphate, tricresyl phosphate, di-n-butyl phosphite, triethanolamine borate and triisopropyl borate.

5. The electromagnetic rheological copper and aluminum rolling oil according to claim 1, characterized in that: The antioxidant includes one or more of butylated hydroxytoluene, 2,6-di-tert-butylphenol, N,N'-diphenyl-p-phenylenediamine and N-phenyl-1-naphthylamine.

6. A method for preparing the electromagnetic rheological copper and aluminum rolling oil according to any one of claims 1 to 5, characterized in that: The preparation method of the electromagnetic rheological copper and aluminum rolling oil comprises: First, titanium dioxide-coated cobalt ferrite is prepared; It is then added to the base oil, to which surfactants, extreme pressure agents, and antioxidants are subsequently added; Finally, the mixture is stirred for 1 to 2 hours to obtain the electromagnetic rheological copper and aluminum rolling oil.

7. An application of the electromagnetic rheological copper and aluminum rolling oil according to any one of claims 1 to 5, characterized in that: The electromagnetic rheological copper-aluminum rolling oil is applied to a copper-aluminum rolling system; the copper-aluminum rolling system comprises: An electromagnetic field controller (1), an electromagnetic field generator (2), a pair of oppositely disposed rollers (3), copper-aluminum metal materials (4), copper-aluminum rolled products (5), and electromagnetic rheological copper-aluminum rolling oil (6); The electromagnetic field controller (1) is electrically connected to the electromagnetic field generator (2) and is used to adjust the properties of the electromagnetic field formed by the electromagnetic field generator (2); a pair of rollers (3) are arranged in the electromagnetic field, and the copper-aluminum metal material (4) to be rolled is placed in the rear sliding area of the rollers (3), and the front sliding area of the rollers forms the copper-aluminum rolled product (5) after rolling, wherein the surface of the copper-aluminum metal material (4) is coated with the electromagnetic rheological copper-aluminum rolling oil (6).

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