阅读说明：本技术 一种耐高温刹车片 (High-temperature-resistant brake pad ) 是由 余十轮 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种耐高温刹车片,属于功能材料技术领域。本发明按重量份数计,将20～30份碳化硅晶须,3～5份二沉池污泥,2～3份蔗糖,30～50份水混合发酵,接着加入碳化硅晶须质量0.1～0.2倍的硝酸铁溶液,接着滴加氨水调节pH至8.6～8.9,搅拌混合,过滤,干燥,高温处理,得预处理碳化硅晶须；将酚醛树脂,稀释剂,固化剂,预处理碳化硅晶须,芳纶,改性添加料,硫酸钡,矿物纤维,硬脂酸钠,煤焦油,线性树脂,异氰酸酯,搅拌混合,注模,热压成型,排气,脱模,干燥,粗磨精磨,开倒角,喷砂,去除毛刺,喷胶,即得耐高温刹车片。本发明提供的耐高温刹车片具有优异的耐磨性能和耐高温性能。(The invention discloses a high-temperature-resistant brake pad, and belongs to the technical field of functional materials. According to the invention, 20-30 parts of silicon carbide whiskers, 3-5 parts of secondary sedimentation tank sludge, 2-3 parts of sucrose and 30-50 parts of water are mixed and fermented, then an iron nitrate solution with the mass of 0.1-0.2 times that of the silicon carbide whiskers is added, then ammonia water is added dropwise to adjust the pH value to 8.6-8.9, the mixture is stirred and mixed, filtered, dried and treated at high temperature, and the pretreated silicon carbide whiskers are obtained; phenolic resin, a diluent, a curing agent, pretreated silicon carbide whiskers, aramid fibers, a modification additive, barium sulfate, mineral fibers, sodium stearate, coal tar, linear resin and isocyanate are stirred and mixed, injection molding, hot press molding, exhausting, demolding, drying, coarse grinding and fine grinding, chamfering, sand blasting, burr removing and glue spraying are carried out, and the high-temperature-resistant brake pad is obtained. The high-temperature-resistant brake pad provided by the invention has excellent wear resistance and high-temperature resistance.)

1. A high temperature resistant brake block which is characterized in that: the composite material is prepared from the following raw materials in parts by weight:

60-80 parts of phenolic resin

40-60 parts of diluent

5-8 parts of curing agent

20-30 parts of pretreated silicon carbide whisker

10-20 parts of aramid fiber

8-10 parts of modified additive

5-8 parts of barium sulfate

8-10 parts of mineral fiber

3-5 parts of sodium stearate

3-5 parts of coal tar

3-5 parts of linear resin

3-5 parts of isocyanate

The preparation process of the high-temperature-resistant brake pad comprises the following steps: weighing the raw materials according to the raw material composition, mixing phenolic resin, a diluent, a curing agent, pretreated silicon carbide whiskers, aramid fibers, a modified additive, barium sulfate, mineral fibers, sodium stearate, coal tar, linear resin and isocyanate, stirring and mixing, injection molding, hot press molding, exhausting, demolding, drying, coarse grinding and fine grinding, chamfering, sand blasting, burr removing and glue spraying to obtain the high-temperature-resistant brake pad.

2. The high temperature resistant brake pad of claim 1, wherein: the phenolic resin is 3201 phenolic resin or 2123 phenolic resin.

3. The high temperature resistant brake pad of claim 1, wherein: the diluent is any one of dimethylbenzene, acetone or ethanol.

4. The high temperature resistant brake pad of claim 1, wherein: the curing agent is any one of vinyl triamine, ethylenediamine or ethylenediamine tetraacetic acid.

5. The high temperature resistant brake pad of claim 1, wherein: the preparation process of the pretreated silicon carbide whisker comprises the following steps: according to the weight parts, 20-30 parts of silicon carbide whisker, 3-5 parts of secondary sedimentation tank sludge, 2-3 parts of cane sugar and 30-50 parts of water are mixed and fermented, then ferric nitrate solution with the mass of 0.1-0.2 time of that of the silicon carbide whisker is added, then ammonia water is dripped to adjust the pH value to 8.6-8.9, the mixture is stirred and mixed, filtered, dried and treated at high temperature, and the pretreated silicon carbide whisker is obtained.

6. The high temperature resistant brake pad of claim 1, wherein: the preparation process of the modified additive comprises the following steps: according to the weight parts, 20-30 parts of polymethyl silicone resin, 5-8 parts of soybean lecithin and 2-3 parts of pig bone meal are mixed and ball-milled to obtain the modified additive.

7. The high temperature resistant brake pad of claim 1, wherein: the mineral fiber is any one of aluminum silicate fiber, glass fiber or gypsum fiber.

8. The high temperature resistant brake pad of claim 1, wherein: the coal tar is any one of low-temperature coal tar and medium-temperature coal tar.

9. The high temperature resistant brake pad of claim 1, wherein: the linear resin is any one of polymethyl methacrylate, polyamide, polyether ether ketone or polyetherimide.

10. The high temperature resistant brake pad of claim 1, wherein: the isocyanate is any one of diphenylmethane diisocyanate, toluene diisocyanate or isophorone diisocyanate.

Technical Field

The invention discloses a high-temperature-resistant brake pad, and belongs to the technical field of functional materials.

Background

With the pace of modern life and the improvement of living standard, automobiles become more and more popular. And with the development of cities, the range of activities of people is also larger and larger. The automobile travels on a highway for a long distance, so the braking performance of the automobile is more and more emphasized under the condition that the automobiles are more and more. Even in cities, people pay more and more attention to the braking effect of automobiles due to the fact that the awareness of personal safety protection is stronger and stronger. The most important safety system of a vehicle is a brake system, and all brake components have high safety requirements. The brake pad is an important part of the whole brake system, and the performance of the brake pad directly influences the reliability of the whole brake system. The brake pad converts kinetic energy of the automobile into heat energy, and the temperature of the brake pad and the brake disc can rise to 400 ℃ or higher during braking. Therefore, the most stressed components in the vehicle are subjected to high temperatures, extremely heavy mechanical and chemical loads. In addition, brake pads are exposed to environmental influences, such as moisture, dust, dirt, etc., over time, which can affect their performance and life.

The friction material of the brake pad is used as a core element in the braking device, and the friction performance of the friction material is utilized to convert the rotational kinetic energy into heat energy and other forms of energy, so that the braking of the movement device is realized, and the excellent performance directly influences the safety, reliability, comfort and the like of the operation of the whole equipment. Since the 70's of the last century, the friction material of brake pads has undergone a great revolution, which has been shifted from the traditional asbestos-type friction material to the asbestos-free type, and the semimetal friction material, the asbestos-free organic (NAO) friction material, the powder metallurgy friction material, the carbon fiber friction material, the ceramic friction material, and the like have been successively introduced. However, as high-speed vehicles such as automobiles and carrier vehicles and mechanical equipment develop in a direction of high speed, high efficiency and environmental protection, the use requirements of modern industry on friction materials become more severe, and therefore research and development of novel brake pads with excellent performance and higher cost performance is a key direction of research of various research institutions.

The high-performance brake pad friction material is required to have excellent frictional wear performance and good physical properties. The physical properties such as compressibility, internal shear strength, thermal expansion and the like are important performance indexes for determining the friction material of the brake pad. The compressibility is closely related to the density and the elastic modulus, can indirectly reflect the brake noise condition of the friction material of the brake pad, and influences the brake smoothness and comfort while influencing the brake lag and the brake pedal stroke. The shear strength test is a necessary test item for the friction material of the brake pad, and comprises the bonding shear strength of the friction material and the back plate and the internal shear strength of the friction material. The reduction in shear strength tends to cause failure of the braking system with serious consequences. The thermal expansion amount is an important index of the friction material of the brake pad, and the brake cannot be completely released due to the excessive thermal expansion amount, so that traffic accidents are easily caused. At present, the traditional brake pad also has the problem that the wear resistance and the high temperature resistance can not be further improved, so the traditional brake pad needs to be researched.

Disclosure of Invention

The invention mainly solves the technical problems that: the high-temperature-resistant brake pad is provided for solving the problem that the wear resistance and the high-temperature resistance of the traditional brake pad cannot be further improved.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a high-temperature-resistant brake pad is composed of the following raw materials in parts by weight:

60-80 parts of phenolic resin

40-60 parts of diluent

5-8 parts of curing agent

20-30 parts of pretreated silicon carbide whisker

10-20 parts of aramid fiber

8-10 parts of modified additive

5-8 parts of barium sulfate

8-10 parts of mineral fiber

3-5 parts of sodium stearate

3-5 parts of coal tar

3-5 parts of linear resin

3-5 parts of isocyanate

The preparation process of the high-temperature-resistant brake pad comprises the following steps: weighing the raw materials according to the raw material composition, mixing phenolic resin, a diluent, a curing agent, pretreated silicon carbide whiskers, aramid fibers, a modified additive, barium sulfate, mineral fibers, sodium stearate, coal tar, linear resin and isocyanate, stirring and mixing, injection molding, hot press molding, exhausting, demolding, drying, coarse grinding and fine grinding, chamfering, sand blasting, burr removing and glue spraying to obtain the high-temperature-resistant brake pad.

The phenolic resin is 3201 phenolic resin or 2123 phenolic resin.

The diluent is any one of dimethylbenzene, acetone or ethanol.

The curing agent is any one of vinyl triamine, ethylenediamine or ethylenediamine tetraacetic acid.

The preparation process of the pretreated silicon carbide whisker comprises the following steps: according to the weight parts, 20-30 parts of silicon carbide whisker, 3-5 parts of secondary sedimentation tank sludge, 2-3 parts of cane sugar and 30-50 parts of water are mixed and fermented, then ferric nitrate solution with the mass of 0.1-0.2 time of that of the silicon carbide whisker is added, then ammonia water is dripped to adjust the pH value to 8.6-8.9, the mixture is stirred and mixed, filtered, dried and treated at high temperature, and the pretreated silicon carbide whisker is obtained.

The preparation process of the modified additive comprises the following steps: according to the weight parts, 20-30 parts of polymethyl silicone resin, 5-8 parts of soybean lecithin and 2-3 parts of pig bone meal are mixed and ball-milled to obtain the modified additive.

The mineral fiber is any one of aluminum silicate fiber, glass fiber or gypsum fiber.

The coal tar is any one of low-temperature coal tar and medium-temperature coal tar.

The linear resin is any one of polymethyl methacrylate, polyamide, polyether ether ketone or polyetherimide.

The isocyanate is any one of diphenylmethane diisocyanate, toluene diisocyanate or isophorone diisocyanate.

The invention has the beneficial effects that:

(1) the invention adds the pretreated silicon carbide whisker and the modified additive, in the preparation process of the pretreated silicon carbide whisker, firstly, the silicon carbide whisker, the sludge of a secondary sedimentation tank, cane sugar and water are mixed and fermented, bacteria can be propagated on the surface of the whisker, ferric nitrate solution is added, because the cell wall on the surface of the bacteria has negative charge, ferric ions with positive charge can be enriched, then ammonia water is dripped to adjust the pH value, so that the ferric ions are precipitated, then high-temperature treatment is carried out, organic matters on the surface of the silicon carbide are carbonized, a large amount of tar can be produced in the carbonization process, simultaneously, ferric hydroxide in the system is precipitated and dehydrated to produce ferric oxide, the produced ferric oxide precipitate is dispersed in a carbon layer, the ferric oxide in the system is reduced into simple substance iron along with the gradual rise of the temperature of the system, and in the use process, the silica bonds in the polymethyl silicon resin in the modified additive are broken and decomposed, the free radicals can penetrate into the pretreated silicon carbide whiskers and are combined with the elemental iron deposited in the pretreated silicon carbide whiskers to form a silicon-oxygen-iron alloy, so that on one hand, the wear-resisting property of a system is improved due to the formation of the silicon-oxygen-iron alloy, and on the other hand, a silicon-oxygen-iron alloy layer is formed in the system along with the large-scale generation of the silicon-oxygen-iron alloy, and the silicon-oxygen-iron alloy has good heat-insulating property and oxygen-isolating effect, so that the high-temperature resistance of the system is further improved, the service life of a product is prolonged, tar generated in the system can be dispersed on the surface of the pretreated silicon carbide whiskers, the interface bonding property between the pretreated silicon carbide whiskers and matrix resin is effectively improved, and the wear-resisting property of the system is further improved;

(2) according to the invention, by adding the mineral fiber and the coal tar, the coal tar has good viscosity and can be attached to the surface of the mineral fiber in the mixing process, and the coal tar is dispersed at the interface combination position of the mineral fiber and the matrix resin, so that the interface combination performance between the mineral fiber and the matrix resin can be improved by the coal tar, and the wear resistance of the system is improved.

Detailed Description

According to parts by weight, 20-30 parts of silicon carbide whiskers, 3-5 parts of secondary sedimentation tank sludge, 2-3 parts of sucrose and 30-50 parts of water are placed in a fermentation kettle, stirring, mixing and fermenting are carried out for 3-5 days under the conditions that the temperature is 30-35 ℃ and the rotating speed is 300-500 r/min, then an iron nitrate solution with the mass fraction of 10-20% and 0.1-0.2 times that of the silicon carbide whiskers is added into the fermentation kettle, ammonia water with the mass fraction of 20-30% is dripped into the fermentation kettle to adjust the pH value to 8.6-8.9, stirring and mixing are carried out for 40-60 min under the condition that the rotating speed is 400-600 r/min, mixed slurry is obtained, then the mixed slurry is filtered to obtain filter residues, then the filter residues are placed in an oven, the filter residues are dried to the constant weight under the temperature of 105-110 ℃ to obtain dried filter residues, then the filter residues are placed in a tubular furnace, and nitrogen is charged into the furnace at the speed of 60-90 mL/min, carrying out high-temperature treatment at 1050-1150 ℃ for 2-3 h, and cooling to room temperature along with the furnace to obtain pretreated silicon carbide whiskers; according to the weight parts, 20-30 parts of polymethyl silicone resin, 5-8 parts of soybean phospholipid and 2-3 parts of pig bone powder are placed in a ball mill to be mixed and ball-milled for 40-60 min, and then the modified additive is obtained; according to parts by weight, 60-80 parts of phenolic resin, 40-60 parts of diluent, 5-8 parts of curing agent, 20-30 parts of pretreated silicon carbide whisker, 10-20 parts of aramid fiber, 8-10 parts of modified additive, 5-8 parts of barium sulfate, 8-10 parts of mineral fiber, 3-5 parts of sodium stearate, 3-5 parts of coal tar, 3-5 parts of linear resin and 3-5 parts of isocyanate are placed in a mixer, stirred and mixed for 40-60 min under the condition of 500-600 r/min to obtain mixed slurry, then the mixed slurry is injected into a mold, then the mold is placed in a forming machine, hot-press forming is carried out under the condition of 140-160 ℃ and 20-23 MPa, after exhaust, the mold is removed to obtain blank, then the blank is placed in a drying box, dried to coarse grinding weight under the condition of 140-150 ℃ to obtain dried blank, then the dried blank is sequentially and finely ground, and (4) chamfering, sand blasting, deburring and glue spraying to obtain the high-temperature-resistant brake pad. The phenolic resin is 3201 phenolic resin or 2123 phenolic resin. The diluent is any one of dimethylbenzene, acetone or ethanol. The curing agent is any one of vinyl triamine, ethylenediamine or ethylenediamine tetraacetic acid. The mineral fiber is any one of aluminum silicate fiber, glass fiber or gypsum fiber. The coal tar is any one of low-temperature coal tar and medium-temperature coal tar. The linear resin is any one of polymethyl methacrylate, polyamide, polyether ether ketone or polyetherimide. The isocyanate is any one of diphenylmethane diisocyanate, toluene diisocyanate or isophorone diisocyanate.

According to the parts by weight, 30 parts of silicon carbide crystal whisker, 5 parts of secondary sedimentation tank sludge, 3 parts of cane sugar and 50 parts of water are placed in a fermentation kettle, stirring, mixing and fermenting for 5 days at the temperature of 35 ℃ and the rotating speed of 500r/min, then adding 20 mass percent ferric nitrate solution which is 0.2 time of the mass of the silicon carbide whiskers into the fermentation kettle, then ammonia water with the mass fraction of 30% is dripped into the fermentation kettle to adjust the pH value to 8.9, the mixture is stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, the mixed slurry is filtered to obtain filter residue, then the filter residue is placed in a drying oven, and is dried to constant weight under the condition that the temperature is 110 ℃ to obtain dry filter residue, then placing the dried filter residue in a tubular furnace, filling nitrogen into the furnace at the rate of 90mL/min, carrying out high-temperature treatment at the temperature of 1150 ℃ for 3h, and cooling to room temperature along with the furnace to obtain the pretreated silicon carbide whisker; according to the weight parts, 30 parts of polymethyl silicone resin, 8 parts of soybean phospholipid and 3 parts of pig bone meal are placed in a ball mill to be mixed and ball-milled for 60min, and then the modified additive is obtained; according to the weight parts, 80 parts of phenolic resin, 60 parts of diluent, 8 parts of curing agent, 30 parts of pretreated silicon carbide whisker, 20 parts of aramid fiber, 10 parts of modified additive, 8 parts of barium sulfate, 10 parts of mineral fiber, 5 parts of sodium stearate, 5 parts of coal tar, 5 parts of linear resin and 5 parts of isocyanate are placed in a mixer, stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, then the mixed slurry is injected into a die, the die is placed in a forming machine, the hot press forming is carried out under the conditions that the temperature is 160 ℃ and the pressure is 23MPa, the demolding is carried out after exhausting to obtain a blank, the blank is placed in a drying box, the drying is carried out to constant weight under the condition that the temperature is 150 ℃ to obtain a dried blank, then the dried blank is subjected to coarse grinding, fine grinding and chamfering, sand blasting to remove burrs and spray glue to obtain the high-temperature resistant brake pad. The phenolic resin is 3201 phenolic resin. The diluent is xylene. The curing agent is vinyl triamine. The mineral fiber is aluminum silicate fiber. The coal tar is low-temperature coal tar. The linear resin is polymethyl methacrylate. The isocyanate is diphenylmethane diisocyanate.

According to the weight parts, 30 parts of polymethyl silicone resin, 8 parts of soybean phospholipid and 3 parts of pig bone meal are placed in a ball mill to be mixed and ball-milled for 60min, and then the modified additive is obtained; according to the weight parts, 80 parts of phenolic resin, 60 parts of diluent, 8 parts of curing agent, 30 parts of silicon carbide whisker, 20 parts of aramid fiber, 10 parts of modified additive, 8 parts of barium sulfate, 10 parts of mineral fiber, 5 parts of sodium stearate, 5 parts of coal tar, 5 parts of linear resin and 5 parts of isocyanate are placed in a mixer, stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, then the mixed slurry is injected into a mold, then the mold is placed in a forming machine, hot press forming is carried out under the conditions that the temperature is 160 ℃ and the pressure is 23MPa, after exhausting, demolding is carried out to obtain a blank, then the blank is placed in a drying box, dried to constant weight under the condition that the temperature is 150 ℃ to obtain a dried blank, and then the dried blank is subjected to fine grinding, chamfering, sand blasting, burr removing and glue spraying in sequence to obtain the high-temperature resistant brake pad. The phenolic resin is 3201 phenolic resin. The diluent is xylene. The curing agent is vinyl triamine. The mineral fiber is aluminum silicate fiber. The coal tar is low-temperature coal tar. The linear resin is polymethyl methacrylate. The isocyanate is diphenylmethane diisocyanate.

According to the parts by weight, 30 parts of silicon carbide crystal whisker, 5 parts of secondary sedimentation tank sludge, 3 parts of cane sugar and 50 parts of water are placed in a fermentation kettle, stirring, mixing and fermenting for 5 days at the temperature of 35 ℃ and the rotating speed of 500r/min, then adding 20 mass percent ferric nitrate solution which is 0.2 time of the mass of the silicon carbide whiskers into the fermentation kettle, then ammonia water with the mass fraction of 30% is dripped into the fermentation kettle to adjust the pH value to 8.9, the mixture is stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, the mixed slurry is filtered to obtain filter residue, then the filter residue is placed in a drying oven, and is dried to constant weight under the condition that the temperature is 110 ℃ to obtain dry filter residue, then placing the dried filter residue in a tubular furnace, filling nitrogen into the furnace at the rate of 90mL/min, carrying out high-temperature treatment at the temperature of 1150 ℃ for 3h, and cooling to room temperature along with the furnace to obtain the pretreated silicon carbide whisker; according to the weight parts, 80 parts of phenolic resin, 60 parts of diluent, 8 parts of curing agent, 30 parts of pretreated silicon carbide whisker, 20 parts of aramid fiber, 8 parts of barium sulfate, 10 parts of mineral fiber, 5 parts of sodium stearate, 5 parts of coal tar, 5 parts of linear resin and 5 parts of isocyanate are placed in a mixer, stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, then the mixed slurry is injected into a mold, then the mold is placed in a forming machine, hot-press forming is carried out under the condition that the temperature is 160 ℃ and the pressure is 23MPa, after exhausting, demolding is carried out to obtain a blank, then the blank is placed in a drying box, dried to constant weight under the condition that the temperature is 150 ℃ to obtain a dried blank, and then the dried blank is subjected to coarse grinding, chamfering, sand blasting, burr removing and glue spraying to obtain the high-temperature resistant brake pad. The phenolic resin is 3201 phenolic resin. The diluent is xylene. The curing agent is vinyl triamine. The mineral fiber is aluminum silicate fiber. The coal tar is low-temperature coal tar. The linear resin is polymethyl methacrylate. The isocyanate is diphenylmethane diisocyanate.

According to the parts by weight, 30 parts of silicon carbide crystal whisker, 5 parts of secondary sedimentation tank sludge, 3 parts of cane sugar and 50 parts of water are placed in a fermentation kettle, stirring, mixing and fermenting for 5 days at the temperature of 35 ℃ and the rotating speed of 500r/min, then adding 20 mass percent ferric nitrate solution which is 0.2 time of the mass of the silicon carbide whiskers into the fermentation kettle, then ammonia water with the mass fraction of 30% is dripped into the fermentation kettle to adjust the pH value to 8.9, the mixture is stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, the mixed slurry is filtered to obtain filter residue, then the filter residue is placed in a drying oven, and is dried to constant weight under the condition that the temperature is 110 ℃ to obtain dry filter residue, then placing the dried filter residue in a tubular furnace, filling nitrogen into the furnace at the rate of 90mL/min, carrying out high-temperature treatment at the temperature of 1150 ℃ for 3h, and cooling to room temperature along with the furnace to obtain the pretreated silicon carbide whisker; according to the weight parts, 30 parts of polymethyl silicone resin, 8 parts of soybean phospholipid and 3 parts of pig bone meal are placed in a ball mill to be mixed and ball-milled for 60min, and then the modified additive is obtained; according to the weight parts, 80 parts of phenolic resin, 60 parts of diluent, 8 parts of curing agent, 30 parts of pretreated silicon carbide whisker, 20 parts of aramid fiber, 10 parts of modified additive, 10 parts of mineral fiber, 5 parts of sodium stearate, 5 parts of coal tar, 5 parts of linear resin and 5 parts of isocyanate are placed in a mixer, stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, then the mixed slurry is injected into a mold, then the mold is placed in a forming machine, hot-press forming is carried out under the conditions that the temperature is 160 ℃ and the pressure is 23MPa, after exhausting, demolding is carried out to obtain a blank, then the blank is placed in a drying box, dried to constant weight under the condition that the temperature is 150 ℃ to obtain a dried blank, and then the dried blank is subjected to coarse grinding, chamfering, sand blasting, burr removing and glue spraying to obtain the high-temperature resistant brake pad. The phenolic resin is 3201 phenolic resin. The diluent is xylene. The curing agent is vinyl triamine. The mineral fiber is aluminum silicate fiber. The coal tar is low-temperature coal tar. The linear resin is polymethyl methacrylate. The isocyanate is diphenylmethane diisocyanate.

According to the parts by weight, 30 parts of silicon carbide crystal whisker, 5 parts of secondary sedimentation tank sludge, 3 parts of cane sugar and 50 parts of water are placed in a fermentation kettle, stirring, mixing and fermenting for 5 days at the temperature of 35 ℃ and the rotating speed of 500r/min, then adding 20 mass percent ferric nitrate solution which is 0.2 time of the mass of the silicon carbide whiskers into the fermentation kettle, then ammonia water with the mass fraction of 30% is dripped into the fermentation kettle to adjust the pH value to 8.9, the mixture is stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, the mixed slurry is filtered to obtain filter residue, then the filter residue is placed in a drying oven, and is dried to constant weight under the condition that the temperature is 110 ℃ to obtain dry filter residue, then placing the dried filter residue in a tubular furnace, filling nitrogen into the furnace at the rate of 90mL/min, carrying out high-temperature treatment at the temperature of 1150 ℃ for 3h, and cooling to room temperature along with the furnace to obtain the pretreated silicon carbide whisker; according to the weight parts, 30 parts of polymethyl silicone resin, 8 parts of soybean phospholipid and 3 parts of pig bone meal are placed in a ball mill to be mixed and ball-milled for 60min, and then the modified additive is obtained; according to the weight parts, 80 parts of phenolic resin, 60 parts of diluent, 8 parts of curing agent, 30 parts of pretreated silicon carbide whisker, 20 parts of aramid fiber, 10 parts of modified additive, 8 parts of barium sulfate, 5 parts of sodium stearate, 5 parts of coal tar, 5 parts of linear resin and 5 parts of isocyanate are placed in a mixer, stirred and mixed for 60min under the condition that the rotating speed is 600r/min to obtain mixed slurry, then the mixed slurry is injected into a mold, then the mold is placed in a forming machine, hot-press forming is carried out under the conditions that the temperature is 160 ℃ and the pressure is 23MPa, after exhausting, demolding is carried out to obtain a blank, then the blank is placed in a drying box, dried to constant weight under the condition that the temperature is 150 ℃ to obtain a dried blank, and then the dried blank is subjected to coarse grinding, chamfering, sand blasting, burr removing and glue spraying to obtain the high-temperature resistant brake pad. The phenolic resin is 3201 phenolic resin. The diluent is xylene. The curing agent is vinyl triamine. The coal tar is low-temperature coal tar. The linear resin is polymethyl methacrylate. The isocyanate is diphenylmethane diisocyanate.

The brake pads obtained in examples 1 to 5 were subjected to performance testing by the following specific testing method:

and detecting the abrasion loss of the brake pad, and representing the high-temperature resistance and the abrasion resistance by the abrasion loss, wherein the lower the abrasion loss is, the more excellent the high-temperature resistance and the abrasion resistance are. Specific detection results are shown in table 1:

table 1: performance test meter

Detecting content	Example 1	Example 2	Example 3	Example 4	Example 5
						Abrasion loss/mg	3.8	7.2	6.8	6.5	7.4
500 ℃ abrasion loss/mg	4.0	8.5	8.1	7.9	8.4

The detection results in the table 1 show that the high-temperature-resistant brake pad obtained by the invention has excellent wear resistance and high-temperature resistance.