Plate-type capacitor and preparation method thereof

Abstract

The invention relates to the technical field of sensors, in particular to a plate-type capacitor and a preparation method thereof, the plate-type capacitor comprises electrode plates and an elastic layer arranged between the electrode plates, and the elastic layer comprises at least one layer of rubber sheet; if the elastic layer comprises two or more rubber sheets, the multiple rubber sheet layers are made into the elastic layer through a lamination method; the surface of the rubber sheet is brushed with a first surface treating agent material to form a first modified layer; and the surface of the electrode plate is brushed with a second surface treating agent material to form a second modified layer. By controlling the raw material components and proportion of the surface treating agent and cooperating with the synergistic effect of the rubber composite material and the nanosheet layer material, the plate-type capacitor has good resilience, low temperature resistance, high dielectric and high pressure resistance, the rubber composite material, the nanosheet layer material and the electrode plate are integrally formed, high-strength adhesion is formed, and the service life of the plate-type capacitor is prolonged. And the batch stability and the service life of the plate-type capacitor are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of sensor material science and technology, and in particular to a plate-type capacitor elastic layer composite material, a plate-type capacitor and a preparation method thereof. Technical Background

[0002] Plate capacitors, also known as parallel plate capacitors, are the most basic and simplest capacitor structure. Parallel plate capacitors consist of two parallel, close and insulated metal plates. An insulating medium is usually filled between the two plates. Common media include air, mica, ceramics, plastic film, etc. The capacitance calculation formula of a plate capacitor is C = εS / 4πkd, where ε is the dielectric constant of the medium between the plates, S is the plate area, d is the distance between the plates, and k is the electrostatic force constant.

[0003] Let A = S / 4πk, then the formula can be simplified to C = εA / d. It can be seen that the capacitance value of the plate capacitor increases with the increase of the dielectric constant of the dielectric layer and decreases with the increase of the distance between the plates. If the dielectric constant of the elastic layer is too small, the measurable range of the sensor capacitance will be reduced, and high precision requirements will be placed on the capacitance detection equipment; the elastic layer has poor resilience, which causes the sensor capacitance value to decrease with the increase of the number of compressions, affecting the detection accuracy. The dielectric constant and resilience of polymers are related to the molecular structure and condensed structure. The more flexible the molecular structure of non-polymers is, the lower the glass transition temperature and the better the resilience, but the dielectric constant is small; polar polymers increase their own dielectric constants while increasing the glass transition temperature and reducing the resilience due to the mutual influence between the dipole moments of the polar groups.

[0004] Polymers are widely used in flexible sensors because of their good resilience. Due to the strength of the polymer itself, the range of these sensors is very small, generally not exceeding 10MPa. In order to obtain a higher range for plate-type capacitive sensors, the plate-type capacitor's own compressive resistance must also be enhanced. Summary of the invention

[0005] The purpose of the present invention is to address the technical problem that existing plate-type capacitors are difficult to achieve high rebound, low temperature resistance, high dielectric and high compressive resistance, and to provide a plate-type capacitor elastic layer composite material, a plate-type capacitor and a preparation method thereof.

[0006] In order to achieve the above-mentioned first object, the technical solution adopted by the present invention is:

[0007] A plate capacitor comprises electrode plates and an elastic layer disposed between the electrode plates, wherein the elastic layer comprises at least one layer of rubber sheet;

[0008] If the elastic layer includes two or more rubber sheets, the plurality of rubber sheets are laminated to form the elastic layer;

[0009] The surface of the rubber sheet is coated with a first surface treatment agent material to form a first modified layer;

[0010] The surface of the electrode plate is coated with a second surface treatment agent material to form a second modified layer;

[0011] The first surface treatment agent material is mainly prepared from the following raw materials by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 parts of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, 0.2-0.5 parts of carbon black, and 10-50 parts of nanosheet barium titanate;

[0012] The second surface treatment agent material is mainly prepared from the following raw materials by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, and 0.2-0.5 parts of carbon black.

[0013] Wherein, the isocyanate material is one of isocyanate and isocyanate prepolymer or a mixture of the two.

[0014] The plate capacitor of the present invention adopts an elastic layer composite material different from that of traditional plate capacitors. The rubber sheet made of the rubber composite material is brushed or rolled on a base with a first surface treatment agent material, and a continuous sheet of nano barium titanate is formed by brushing or rolling on the surface of the rubber sheet, thereby enhancing the dielectric properties of the elastic layer.

[0015] Among them, the isocyanate component in the first surface treatment agent material can react with the hydroxyl group of the sheet nano barium titanate to form a strong chemical bond. At the same time, the rubber sheet can form a strong chemical cross-linking bond with the first surface treatment agent material through sulfur-sulfur bonds and carbon-carbon bonds at high temperature. Zinc oxide in the surface treatment agent can be used to provide reaction activity, peroxide and sulfur are used for cross-linking reaction, and carbon black can be used not only for dyeing but also for reinforcement to provide mechanical properties.

[0016] The second surface treatment agent material uses raw materials similar to but different from the first surface treatment agent material based on the characteristics of the electrode plate, reduces the nanosheet layer of barium titanate, and keeps the other components the same, so that the first modified layer on the surface of the rubber sheet and the second modified layer on the surface of the electrode plate have good mutual affinity, and the performance of the plate capacitor is excellent.

[0017] By controlling the raw material components and ratio of the surface treatment agent, and coordinating the synergistic effect of the rubber sheet made of the rubber composite material, the elastic layer composite material has good rebound, low temperature resistance, high dielectric and high compression resistance, and a high-strength bond can be formed between the rubber sheet and the sheet nano barium titanate, greatly improving the quality of the elastic layer composite material.

[0018] Among them, nanosheet barium titanate is a nanosheet material.

[0019] Furthermore, a first surface treatment agent material is used to roll or brush the outer surface of the rubber sheet to form a first modified layer, thereby obtaining a rubber sheet having the first modified layer.

[0020] Furthermore, the rubber sheet is a rubber sheet made of a rubber composite material.

[0021] Furthermore, the elastic layer includes two or more rubber sheets, and the first surface treatment agent material is coated on the surface of the rubber sheet, so that a sheet nano barium titanate layer is formed on the surface of the rubber sheet. In the composite material formed by the elastic layer, the first surface treatment agent material is brushed or rolled between adjacent rubber sheets, and a first modified layer is formed on the surface of the rubber sheet after the solvent evaporates, and the first modified layer sandwiches the sheet nano barium titanate between adjacent rubber sheets.

[0022] Furthermore, the rubber sheet is a sheet made of a rubber composite material, and specifically, the rubber sheet is mainly prepared from the following raw materials by weight: 100 parts of rubber, 40-55 parts of filler, 5-15 parts of cyclohexane oil, 4-10 parts of zinc oxide, 1-2 parts of stearic acid, 2.5-3 parts of a second accelerator, 2-4 parts of a vulcanizing agent, and 2-3 parts of an antioxidant. The antioxidant includes an amine antioxidant and a peroxide decomposition type antioxidant, and the vulcanizing agent is a mixture of sulfur and a second peroxide; the rubber is a rubber with a glass transition temperature below -30°C.

[0023] Preferably, in the raw materials for preparing the rubber sheet, the rubber (i.e., raw rubber) is a rubber with a glass transition temperature lower than -30°C. In the formula raw materials of the above-mentioned rubber sheet, the rubber with a glass transition temperature lower than -30°C is used as the main raw material. The low glass transition temperature rubber molecular chain has good flexibility, is not easy to crystallize, and can maintain a high elastic state at low temperatures. The first surface treatment agent material is brushed or rolled between adjacent rubber sheets (i.e., rubber composite material sheets), and the elastic layer composite material is obtained by multi-layer superposition. The first surface treatment agent material contains sheet nano barium titanate, and the brushing or rolling method can allow the sheet nano barium titanate to be oriented on the rubber sheet. The sheet nano barium titanate can not only improve the dielectric constant of the elastic layer composite material, but also increase the rigidity of the elastic layer composite material and improve its bearing capacity. The isocyanate component in the raw material component can react with the hydroxyl group of the sheet nano barium titanate to form a strong chemical bond. At the same time, the rubber sheet can form a strong chemical cross-linking bond with the first surface treatment agent material through sulfur-sulfur bonds and carbon-carbon bonds at high temperatures.

[0024] Furthermore, in the raw materials for preparing the rubber sheet, the filler is a mixture of carbon black and nano-spherical barium titanate.

[0025] Preferably, the ratio of the carbon black to the nano-spherical barium titanate is 1:1 to 0.5.

[0026] Furthermore, in the raw materials for preparing the rubber sheet, the glass transition temperature of the raw rubber is lower than -30°C.

[0027] Furthermore, the antioxidant is one or both of antioxidant AW and antioxidant 445. In the raw materials for preparing the rubber sheet, the antioxidant is selected from one or both of the above raw materials, which can optimize the initial performance of the rubber sheet and improve the comprehensive performance of the capacitor.

[0028] Preferably, the antioxidant is a mixture of antioxidant AW and antioxidant 445, wherein the weight ratio of the antioxidant AW to the antioxidant 445 is 1: 1. Using one or both of the antioxidant AW and the antioxidant 445 can form a synergistic effect, can capture the molecular chain free radicals generated by aging, and terminate the molecular chain aging reaction chain.

[0029] Furthermore, the weight ratio of the sulfur to the second peroxide is 0.8 to 3:1.

[0030] More preferably, the weight ratio of the sulfur to the second peroxide is 1 to 2:1.

[0031] Furthermore, the second peroxide is one or both of DCP and BIBP.

[0032] Peroxide and sulfur are used together as vulcanizing agents, which not only retain the high tensile strength and elongation of the sulfur-sulfur bond, but also form a certain carbon-carbon bond with high bond energy and is not easily oxidized.

[0033] Furthermore, the second accelerator is a mixture of a sulfenamide accelerator and a thiuram accelerator.

[0034] Wherein, the sulfenamide accelerator is one or more of N-tert-butyl-2-benzothiazole sulfenamide, N-cyclohexyl-2-benzothiazole sulfenamide, N,N-dicyclohexyl-2-benzothiazole sulfenamide, N-oxydiethylene-2-benzothiazole sulfenamide and N-oxydiethylenethiocarbamoyl-N′-oxydiethylene sulfenamide;

[0035] The thiuram accelerator is one or more of tetramethylthiuram monosulfide, tetramethylthiuram disulfide, tetraethylthiuram disulfide, and bis(1,5-pentylene)thiuram tetrasulfide.

[0036] Preferably, the sulfenamide accelerator is NOBS, and the thiuram accelerator is TMTM.

[0037] Furthermore, the weight ratio of the sulfenamide accelerator to the thiuram accelerator is 2:0.5 to 2.5:0.5.

[0038] Preferably, the weight ratio of the sulfenamide accelerator to the thiuram accelerator is 2:0.5.

[0039] The accelerator in the rubber sheet formula can make cross-linking form single sulfur bonds, which is beneficial to the high temperature resistance of the material.

[0040] Furthermore, the first surface treatment agent material is mainly prepared from the following raw materials by weight: 60-80 parts of organic solvent, 4-19 parts of isocyanate material, 2-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.7 parts of sulfur, 0.1-0.8 parts of first accelerator, 0.2-0.5 parts of carbon black, and 10-45 parts of nanosheet barium titanate.

[0041] Furthermore, the first surface treatment agent material is made of the following raw materials in parts by weight: 60-80 parts of organic solvent, 4-18 parts of isocyanate materials, 2-9 parts of polyols, 0.5-1 parts of first peroxide, 1.2-2 parts of zinc oxide, 0.5-0.8 parts of sulfur, 0.6-0.8 parts of first accelerator, 0.2-0.5 parts of carbon black, and 10-50 parts of nano-sheet barium titanate. By using the preferred raw material formula of the first surface treatment agent material, the prepared first modified layer has better resilience, low temperature resistance, high dielectric and high compressive resistance on the surface of the elastic layer composite material, especially allowing better bonding between the rubber sheet and the sheet nano-barium titanate.

[0042] Furthermore, the second surface treatment agent material is mainly prepared from the following raw materials by weight: 60-75 parts of organic solvent, 4-20 parts of isocyanate material, 2-10 parts of polyol, 0.1-1 part of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, and 0.2-0.5 parts of carbon black.

[0043] Furthermore, the polyol is at least one of hydroxyl-terminated polybutadiene and amine-terminated polybutadiene. On the one hand, hydroxyl-terminated polybutadiene and amine-terminated polybutadiene can provide double bonds to allow the surface treatment agent to react with the laminated rubber interface, and on the other hand, hydroxyl-terminated polybutadiene and amine-terminated polybutadiene have good flexibility and can improve the low temperature resistance of the surface treatment agent.

[0044] Furthermore, the polyol is a hydroxy-terminated polybutadiene with an average molecular weight of 1000 to 5000.

[0045] Preferably, the polyol is hydroxy-terminated polybutadiene with an average molecular weight of 3000-5000.

[0046] After a lot of experimental research, it was found that the average molecular weight of hydroxyl-terminated polybutadiene affects the viscosity and stiffness of the surface treatment agent. The study found that when the average molecular weight is lower than 1000, the stiffness of the surface treatment agent after reaction is too large, affecting the bonding. When the average molecular weight is higher than 5000, the viscosity of the surface treatment agent is too large, affecting its wetting effect on the interface.

[0047] Furthermore, in the first surface treatment agent material and the second surface treatment agent material, the organic solvent is one or more of toluene, xylene and ethylbenzene.

[0048] Furthermore, the isocyanate is at least one of hexamethylene diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate.

[0049] Furthermore, the isocyanate prepolymer is prepared from isocyanate and terminal hydroxyl polybutadiene.

[0050] Further, the isocyanate prepolymer is mainly prepared by the following method:

[0051] a. Vacuum the hydroxy-terminated polybutadiene at 110-130°C to remove water;

[0052] b. Mix isocyanate and hydroxy-terminated polybutadiene at room temperature in an NCO:OH ratio of 1 to 3:1, and then react at 60°C to 90°C for 1.5 to 3 hours. After the reaction is completed, the isocyanate prepolymer is obtained.

[0053] Furthermore, the first peroxide is benzoyl peroxide.

[0054] Furthermore, the first accelerator is a sulfonamide accelerator, and preferably the first accelerator is accelerator CZ.

[0055] Further, the first surface treatment agent material is prepared by the following method:

[0056] Step S1, evacuate the polyol at 110-130° C., remove water, and cool to room temperature;

[0057] Step S2, under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C, with a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1, and react for 2 hours;

[0058] Step S3, adding an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, carbon black, and nanosheet barium titanate to the reactant obtained in step S2 in sequence, stirring at room temperature to obtain a first surface treatment agent material.

[0059] Further, the second surface treatment agent material is prepared by the following method:

[0060] Step S1, evacuate the polyol at 110-130° C., remove water, and cool to room temperature;

[0061] Step S2, under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C, with a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1, and react for 2 hours;

[0062] Step S3, adding an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, and carbon black to the reactant obtained in step S2 in sequence, stirring at room temperature, to obtain a second surface treatment agent material.

[0063] Furthermore, the elastic layer is prepared by the following method:

[0064] T1. Take the raw materials for preparing the rubber sheet, mix them and obtain the rubber sheet.

[0065] T2. Prepare the first surface treatment agent material for standby use.

[0066] T3. Cut rubber sheets according to specifications;

[0067] Then, the first surface treatment agent material obtained by T2 is rolled or brushed onto the surface of the rubber sheet, and the rubber sheet having the first modified layer is left to stand. At least one of the rubber sheets having the first modified layer is used as an elastic layer. If there are two or more rubber sheets having the first modified layer, they are stacked as a composite material of the elastic layer.

[0068] Furthermore, the specific operation steps in T1 are: mixing the raw rubber, filler, naphthenic oil, zinc oxide, stearic acid, second accelerator and antioxidant in proportion with an internal mixer, and sheeting to obtain a mixed rubber, and then mixing the mixed rubber with a vulcanizing agent, and sheeting to obtain a rubber sheet, that is, a rubber composite material sheet.

[0069] The ratio of the aforementioned raw rubber, filler, cyclohexane oil, zinc oxide, stearic acid, second accelerator and antioxidant is: 100 parts of rubber, 40-55 parts of filler, 5-15 parts of cyclohexane oil, 4-10 parts of zinc oxide, 1-2 parts of stearic acid, 2.5-3 parts of second accelerator, 2-4 parts of vulcanizer and 2-3 parts of antioxidant.

[0070] Another object of the present invention is to provide a method for preparing the above-mentioned plate capacitor.

[0071] The present invention controls the raw material components and ratio of the second surface treatment agent material, and cooperates with the synergistic effect of the elastic layer composite material, so that the plate capacitor has good resilience, low temperature resistance, high dielectric and high compressive resistance. The elastic layer composite material and the pole plate are integrally formed by molding. After molding, the elastic layer composite material and the pole plate can form a high-strength bond, which greatly improves the batch stability of the plate capacitor product. The preparation process is simple and is conducive to industrial large-scale production and application.

[0072] A method for preparing a plate capacitor comprises the following steps:

[0073] The rubber material is kneaded to obtain a rubber sheet for standby use; a first surface treatment agent material is prepared for standby use;

[0074] Cutting the rubber sheet according to the specification; then, rolling or brushing the first surface treatment agent material onto the surface of the rubber sheet, and letting it stand to obtain a modified rubber sheet;

[0075] Prepare a second surface treatment agent material for standby use; cut the electrode plate according to specifications, and perform surface sandblasting and degreasing on the electrode plate; then, roll or brush the second surface treatment agent material onto the outer surface of the electrode plate, and let it stand to obtain a modified electrode plate;

[0076] At least one layer of modified rubber sheet is stacked as an elastic layer and placed between modified electrode plates; then, it is placed in a mold, vulcanized and molded at 135-150° C., and demolded to obtain a plate capacitor.

[0077] Further, the first surface treatment agent material is roller coated or brushed on the rubber sheet, and the coating amount is controlled to be 20-50g / m 2 .

[0078] Further, the second surface treatment agent material is roller-coated or brush-coated onto the electrode plate, and the coating amount is controlled to be 20-50 g / m 2 .

[0079] Furthermore, the first surface treatment agent material is prepared by the following method:

[0080] B101. Evacuate the polyol in proportion at 110-130°C, remove water, and cool to room temperature.

[0081] B102. Under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C-90°C at a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1 and react for 2 h.

[0082] B103, adding an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, carbon black, and lamellar nano-barium titanate to the reactant obtained in B102 in order according to proportion, stirring at room temperature to obtain a first surface treatment agent material.

[0083] Furthermore, the second surface treatment agent material is prepared by the following method:

[0084] B201. Evacuate the polyol in proportion at 110-130°C, remove water, and cool to room temperature.

[0085] B202. Under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C-90°C at a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1 and react for 2 h.

[0086] B203, add an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, and carbon black to the reactant obtained in B202 in order according to proportion, and stir at room temperature to obtain a second surface treatment agent material.

[0087] The plate-type capacitor provided by the present invention is prepared by placing electrode plates coated with a second surface treatment agent material on the upper and lower surfaces of an elastic layer composite material, and demolding the plates after vulcanization molding. The preparation process of the plate-type capacitor provided by the present invention is simple and is conducive to industrial large-scale production and application.

[0088] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0089] 1. The elastic layer composite material provided by the present invention is a layered nano bionic material, which is formed by oriented sheet nano barium titanate by brushing or roller coating, and multiple sheets are stacked. The synergistic effect of the rubber composite material and the nano sheet material makes the plate capacitor have good rebound, low temperature resistance, high dielectric and high compressive resistance.

[0090] 2. The present invention controls the raw material components and ratios of the surface treatment agent and cooperates with the synergistic effect of the rubber sheet (i.e., the rubber composite film) to make the elastic layer composite material have good rebound, low temperature resistance, high dielectric and high compressive resistance, and a high-strength bond can be formed between the rubber composite film and the sheet nano barium titanate, greatly improving the quality of the elastic layer composite material.

[0091] 3. The rubber composite material, nanosheet material and electrode plate of the plate capacitor provided by the present invention are integrally formed to form a high-strength bond, which greatly improves the batch stability and service life of the plate capacitor.

[0092] 4. The plate capacitor of the present invention has a simple preparation process, which is conducive to industrial large-scale production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0093] Figure 1 This is a graph showing the change in capacitance of the plate capacitor of Example 6 at -20°C as a function of stress. DETAILED DESCRIPTION

[0094] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail in the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0095] The raw materials and reagents used in the embodiments / comparative examples of the present invention may be chemical reagents of the following brands, purities or specifications, but are not limited to the following specifications or models. Reagents with equivalent functions / effects known to those skilled in the art may be substituted without affecting the implementation of the technical solution of the present invention.

[0096] Butadiene rubber, molecular weight 1000-5000, buy company.

[0097] Carbon black, purity 99%, purchased from company.

[0098] Nano-spherical barium titanate, purity 99.9%, average particle size 100nm, purchased from company.

[0099] Nanosheet barium titanate was purchased from Shandong Guoci Functional Materials Co., Ltd.

[0100] Naphthenic oil, analytical grade AR, was purchased from Chengdu Kelong Chemicals Co., Ltd.

[0101] Zinc oxide, purity 99.95%, was purchased from Chengdu Kelong Chemical Co., Ltd.

[0102] Stearic acid, analytical grade, was purchased from Chengdu Kelong Chemicals Co., Ltd.

[0103] NOBS, also known as accelerator NOBS, is N-(oxyethylene)-2-benzothiazole sulfenamide, analytically pure, purchased from company.

[0104] TMTM, tetramethylthiuram monosulfide, 97% pure, purchased from company.

[0105] DCP, i.e. 1,3 dichloro-2-propanol, purity 98%, was purchased from company.

[0106] Accelerator CZ, N-cyclohexylbenzothiazole-2-sulphenamide, CAS: 95-33-0, was purchased from Jiangsu Bosite Chemical Technology Co., Ltd.

[0107] Antioxidant AW, namely ethoxyquinoline, purity 90%, purchased from company.

[0108] Antioxidant 445, i.e. 4,4'-di(phenylisopropyl)diphenylamine, purity 98%, purchased from company.

[0109] The fractions of the raw materials and intermediate materials used in the following examples are all weight parts, and the weight of each part can be 0.5 grams, 1 gram or 10 grams according to the small and pilot scales of the experiment. Specifically, the weight of each part selected in the experiment is 1 gram.

[0110] Example 1

[0111] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 10 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a mixed rubber, and put it aside for use; then mix the mixed rubber and the vulcanizing agent evenly, and make the cis-1,4-butadiene rubber mixed rubber into a 0.1 mm rubber sheet (referred to as a rubber sheet).

[0112] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 1000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature and set aside. Add 4 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 1 part of terminal hydroxyl polybutadiene with an average molecular weight of 1000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 10 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0113] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0114] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 1000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 4 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 1 part of terminal hydroxyl polybutadiene with an average molecular weight of 1000 to react for 2h and then end the reaction. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0115] Step 5: Cut the electrode plate into a specified shape, i.e. prepare the electrode plate, and perform surface sandblasting and degreasing. The polyurethane surface treatment agent (i.e. the second surface treatment agent material, the main active ingredient is polyurethane, the same below) obtained in step 4 is evenly rolled or brushed onto the surface of the electrode plate, and the coating amount is controlled to be 30g / m 2 , wait for the solvent to evaporate completely and set aside.

[0116] Step 6: Put the rubber sheets obtained in step 3 in multiple layers into a mold between the treated plates and vulcanize at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0117] Example 2

[0118] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 15 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a rubber mix, and put it aside for use; then mix the rubber mix evenly with a vulcanizing agent, and cut the cis-1,4-butadiene rubber mix into a 0.1 mm rubber sheet.

[0119] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 5000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 5000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 20 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0120] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0121] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 5000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 5000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0122] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0123] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0124] Example 3

[0125] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a mixed rubber, and put it aside for use; then mix the mixed rubber and the vulcanizing agent evenly, and cut the cis-1,4-butadiene rubber mixed rubber into a 0.1 mm rubber sheet.

[0126] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 30 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0127] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0128] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0129] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0130] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0131] Example 4

[0132] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 20 parts of carbon black, 30 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a mixed rubber, and put it aside for use; then mix the mixed rubber and the vulcanizing agent evenly, and make the cis-1,4-butadiene rubber mixed rubber into a 0.1 mm rubber sheet.

[0133] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 30 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0134] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0135] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0136] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m2 , and set aside after the solvent evaporates completely.

[0137] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0138] Example 5

[0139] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a mixed rubber, and put it aside for use; then mix the mixed rubber and the vulcanizing agent evenly, and cut the cis-1,4-butadiene rubber mixed rubber into a 0.1 mm rubber sheet.

[0140] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 40 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0141] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0142] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0143] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0144] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0145] Example 6

[0146] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a mixed rubber, and put it aside for use; then mix the mixed rubber and the vulcanizing agent evenly, and cut the cis-1,4-butadiene rubber mixed rubber into a 0.1 mm rubber sheet.

[0147] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C ± 5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 50 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0148] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0149] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0150] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0151] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0152] Example 7

[0153] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 17 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a rubber mix, and put it aside for use; then mix the rubber mix evenly with a vulcanizing agent, and cut the cis-1,4-butadiene rubber mix into a 0.1 mm rubber sheet.

[0154] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 25 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0155] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0156] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0157] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0158] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0159] Example 8

[0160] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 17 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a rubber mix, and put it aside for use; then mix the rubber mix evenly with a vulcanizing agent, and cut the cis-1,4-butadiene rubber mix into a 0.1 mm rubber sheet.

[0161] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 35 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0162] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0163] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0164] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0165] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0166] Example 9

[0167] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 17 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a mixed rubber, and put it aside for use; then mix the mixed rubber and the vulcanizing agent evenly, and make the cis-1,4-butadiene rubber mixed rubber into a 0.1 mm rubber sheet.

[0168] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black, 40 parts of nanosheet barium titanate to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0169] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m2 , and cut into specified shapes after the solvent evaporates.

[0170] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 15 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0171] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0172] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0173] Comparative Example 1

[0174] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 50 parts of carbon black, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a rubber mix, and set aside; then mix the rubber mix evenly with a vulcanizing agent, and cut the cis-1,4-butadiene rubber mix into a 0.1 mm rubber sheet.

[0175] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0176] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m2 , and cut into specified shapes after the solvent evaporates.

[0177] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0178] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0179] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0180] Comparative Example 2

[0181] Step 1, weigh 100 parts of cis-1,4-butadiene rubber, 30 parts of carbon black, 20 parts of nano-spherical barium titanate, 5 parts of naphthenic oil, 4 parts of zinc oxide, 1 part of stearic acid, 2 parts of NOBS, 0.5 parts of TMTM, 1.5 parts of sulfur, 1 part of DCP, 1 part of antioxidant AW, and 1 part of antioxidant 445. Use an internal mixer to mix evenly, slice, obtain a mixed rubber, and put it aside for use; then mix the mixed rubber and the vulcanizing agent evenly, and cut the cis-1,4-butadiene rubber mixed rubber into a 0.1 mm rubber sheet.

[0182] Step 2, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the first surface treatment agent material.

[0183] Step 3: Evenly apply the first surface treatment agent material obtained in step 2 on the rubber sheet obtained in step 1, and control the coating amount to 30 g / m 2 , and cut into specified shapes after the solvent evaporates.

[0184] Step 4, vacuum the terminal hydroxyl polybutadiene with an average molecular weight of 3000 at 120°C for 1h to remove water. After the water removal is completed, cool to room temperature. Add 20 parts of hexamethylene diisocyanate to a three-necked flask under a nitrogen protection environment, stir and heat to 80°C±5°C, the stirring speed is 120r / min, and then slowly add 10 parts of terminal hydroxyl polybutadiene with an average molecular weight of 3000 to react for 2h before the reaction is terminated. Then add 60 parts of ethylbenzene, 0.2 parts of benzoyl peroxide, 0.8 parts of zinc oxide, 0.2 parts of sulfur, 0.3 parts of accelerator CZ, 0.2 parts of carbon black to the above reactants in sequence, and stir evenly at room temperature to obtain the second surface treatment agent material.

[0185] Step 5: Cut the plate into a specified shape, and perform surface sandblasting and degreasing. Roll or brush the polyurethane surface treatment agent obtained in step 4 evenly onto the surface of the plate, and control the coating amount to 30 g / m 2 , and set aside after the solvent evaporates completely.

[0186] Step 6: stack the rubber sheets obtained in step 3 in multiple layers and place them in a mold between the plates treated in step 5 for vulcanization at 135° C. After vulcanization for 60 minutes, demould and trim the edges to obtain a plate capacitor.

[0187] The rubber bearing obtained in the present invention is tested for physical properties using the following standards, and the specific test methods or reference standards are as follows.

[0188] GB / T 7760-2003 was used to test the peel strength between the elastic layer composite material and the electrode plate.

[0189] GB / T 15256-2014 was used to test the low temperature resistance of the elastic layer composite material.

[0190] The compression modulus of plate capacitors was tested using a universal mechanical testing machine.

[0191] GB / T 5594.4-2015 is used to test the dielectric constant of plate capacitors.

[0192] The LCR tester and universal mechanical testing machine are used to test the change of pressure with capacitance of plate capacitors at low temperature.

[0193] GBT7759.1-2015 is used to test the compression permanent deformation of plate capacitors.

[0194] The performance of the materials was tested by the above method or under the guidance of national standards, and the properties of the materials and plate capacitors prepared in the embodiments and comparative examples were finally obtained as shown in the following table.

[0195] Table 1 Physical properties test results

[0196]

[0197]

[0198] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plate capacitor, characterized in that: It includes electrode plates and an elastic layer disposed between the electrode plates, wherein the elastic layer includes at least one layer of rubber sheet; If the elastic layer includes two or more rubber sheets, the plurality of rubber sheets are laminated to form the elastic layer; The surface of the rubber sheet is coated with a first surface treatment agent material to form a first modified layer; The surface of the electrode plate is coated with a second surface treatment agent material to form a second modified layer; The first surface treatment agent material is mainly prepared from the following raw materials by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 parts of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, 0.2-0.5 parts of carbon black, and 10-50 parts of nanosheet barium titanate; The second surface treatment agent material is mainly prepared from the following raw materials by weight: 60-80 parts of organic solvent, 4-20 parts of isocyanate material, 1-10 parts of polyol, 0.1-1 parts of first peroxide, 0.5-2 parts of zinc oxide, 0.1-0.8 parts of sulfur, 0.1-0.8 parts of first accelerator, and 0.2-0.5 parts of carbon black; Wherein, the isocyanate material is one of isocyanate and isocyanate prepolymer or a mixture of the two.

2. A plate capacitor according to claim 1, characterized in that: The rubber sheet is a rubber sheet made of a rubber composite material.

3. A plate capacitor according to claim 1, characterized in that: The rubber sheet is a rubber sheet made of a rubber composite material, and specifically, the rubber sheet is mainly prepared from the following raw materials by weight: 100 parts of rubber, 40-55 parts of filler, 5-15 parts of cyclohexane oil, 4-10 parts of zinc oxide, 1-2 parts of stearic acid, 2.5-3 parts of a second accelerator, 2-4 parts of a vulcanizing agent, and 2-3 parts of an antioxidant; wherein the antioxidant comprises an amine antioxidant and a peroxide decomposing agent type antioxidant, and the vulcanizing agent is a mixture of sulfur and a second peroxide; and the rubber is a rubber having a glass transition temperature below -30°C.

4. A plate capacitor according to claim 3, characterized in that: In the raw materials for preparing the film, the filler is a mixture of carbon black and nano-spherical barium titanate.

5. A plate capacitor according to claim 3, characterized in that: The antioxidant is one or both of antioxidant AW and antioxidant 445.

6. A plate capacitor according to claim 3, characterized in that: The polyol is one or two of hydroxyl-terminated polybutadiene and amine-terminated polybutadiene.

7. A plate capacitor according to claim 1, characterized in that: The isocyanate prepolymer is prepared from isocyanate and terminal hydroxyl polybutadiene.

8. A plate capacitor according to claim 1, characterized in that: The first surface treatment agent material is prepared by the following method: Step S1, evacuate the polyol at 110-130° C., remove water, and cool to room temperature; Step S2, under nitrogen protection, add isocyanate materials into a three-necked flask, stir and heat to 70°C to 90°C, with a stirring speed of 120 r / min, then slowly add the polyol obtained in step S1, and react for 2 hours; Step S3, adding an organic solvent, a first peroxide, zinc oxide, sulfur, a first accelerator, carbon black, and nanosheet barium titanate to the reactant obtained in step S2 in sequence, stirring at room temperature to obtain a first surface treatment agent material.

9. A method for preparing a plate capacitor, characterized in that: The following steps are involved: The rubber material is kneaded to obtain a rubber sheet for standby use; a first surface treatment agent material is prepared for standby use; Cut rubber sheets to specifications; Then, the first surface treatment agent material is rolled or brushed onto the surface of the rubber sheet, and allowed to stand to obtain a modified rubber sheet; Prepare a second surface treatment agent material for standby use; cut the electrode plate according to specifications, and perform surface sandblasting and degreasing on the electrode plate; then, roll or brush the second surface treatment agent material onto the outer surface of the electrode plate, and let it stand to obtain a modified electrode plate; stacking at least one layer of modified film as an elastic layer and placing it between the modified electrode plates; Then, the plate capacitor is obtained by placing the plate into a mold, vulcanizing and molding the plate at 135 to 150°C, and demolding the plate.

10. The method for preparing a plate capacitor according to claim 9, characterized in that: The first surface treatment agent material is rolled or brushed on the rubber sheet, and the coating amount is controlled to be 20-50g / m 2 .

Images