CN107353638B - Resin-based friction material filled with granulated zirconia and preparation method thereof - Google Patents
Resin-based friction material filled with granulated zirconia and preparation method thereof Download PDFInfo
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- CN107353638B CN107353638B CN201710534573.6A CN201710534573A CN107353638B CN 107353638 B CN107353638 B CN 107353638B CN 201710534573 A CN201710534573 A CN 201710534573A CN 107353638 B CN107353638 B CN 107353638B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/10—Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1436—Composite particles, e.g. coated particles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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Abstract
The invention discloses a resin-based friction material filled with granulated zirconia, which is characterized in that nano zirconia is granulated to obtain micron-sized zirconia particles with a nano structure, and the micron-sized zirconia particles are introduced into the resin-based friction material; the advantages that the good fluidity of the granulation particles is beneficial to the even dispersion of the components in a friction system, thereby leading the material mixing process to be more time-saving and effective; the nano structure of the zirconia enables the friction coefficient of the prepared friction material to be higher and more stable, the heat fading resistance is excellent, and the recovery performance is better. The preparation method provided by the embodiment of the invention is simple in process, simple in required equipment and suitable for industrial production.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to a resin-based friction material filled with granulated zirconia and a preparation method thereof.
Background
Friction materials are widely used in the transmission and braking of vehicles and machinery and are key components in transmission and braking systems. Therefore, the requirements for the performance of the friction material are also increasing. In the related art, the semimetal-based friction material is widely applied because of good temperature resistance, fading resistance at high temperature and moderate manufacturing cost; however, the semimetal-based friction material product has high hardness, noise during braking, easy rusting on the surface of the product, corrosion to mating parts, high heat conductivity coefficient, reduced safety performance and shortened service life.
Disclosure of Invention
In view of this, embodiments of the present invention provide a resin-based friction material of granulated zirconia having a high and stable friction coefficient, excellent thermal decay resistance, and good recovery performance, and a method for preparing the same.
In order to solve the technical problem, the embodiment of the invention provides a resin-based friction material filled with granulated zirconia, which comprises the following components in percentage by weight: 5-25% of granulated zirconia, 12-18% of phenolic resin, 15-25% of aramid pulp, 5-10% of graphite and 35-55% of barium sulfate.
Preferably, the granulated zirconia has a diameter of 5 to 50 μm.
The embodiment of the invention also provides a preparation method of the resin-based friction material filled with the granulated zirconia, which comprises the following steps:
(1) preparing granulated zirconia by adopting nano zirconia;
(2) weighing raw materials according to weight percentage, wherein the raw materials comprise aramid pulp, granulated zirconia, phenolic resin, graphite and barium sulfate;
(3) putting the aramid pulp into a high-speed mixer, mixing for 1 minute, simultaneously putting the granulated zirconia, the phenolic resin, the graphite and the barium sulfate into the high-speed mixer, and stirring for 3 minutes to obtain a uniformly mixed mixture;
(4) putting the mixture into a steel die, and molding at the temperature of 160-180 ℃ and under the pressure of 10MPa to obtain a molded material sample;
(5) and curing the molded composite material sample in an oven at 160-200 ℃ for 4-6 h to obtain the friction material.
Furthermore, the particle size of the nano zirconia is 10-500 nm.
Further, in the step (4), 3-6 times of exhaust process is performed in the forming process, and pressure is maintained for 6-10 min under the pressure of 10MPa after the exhaust is completed.
Compared with the related art, the technical scheme provided by the embodiment of the invention has the following beneficial effects: the resin-based friction material filled with the granulated zirconia has a simple formula, and the friction material filled with the granulated zirconia is added into the resin matrix, so that the friction coefficient can be effectively regulated and stabilized, and the application range of the resin-based friction material is expanded.
Drawings
FIG. 1 is a schematic flow chart of a method for preparing a friction material according to an embodiment of the present invention;
FIG. 2 is a graphical representation of the coefficient of friction versus temperature for a friction material with different proportions of granulated zirconia added to embodiments of the present invention;
FIG. 3 is a graphical representation of the heat fade resistance and recovery for friction coefficients of friction materials with different proportions of granulated zirconia added to embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Example one
The embodiment of the invention provides a resin-based friction material filled with granulated zirconia, which comprises the following components in percentage by weight: 5-25% of granulated zirconia, 12-18% of phenolic resin, 15-25% of aramid pulp, 5-10% of graphite and 35-55% of barium sulfate; the particle size of the granulated zirconia is 5-50 μm. The resin-based friction material added with the granulated zirconia can still keep stable friction coefficient under high temperature, is not easy to generate heat fading phenomenon, ensures braking efficiency and improves safety; the application range of the resin-based friction material is enlarged.
Referring to the attached figure 1, the embodiment of the invention also provides a preparation method of the resin-based friction material filled with the granulated zirconia, which comprises the following steps:
(1) preparing granulated zirconia by adopting nano zirconia, wherein the particle size of the nano zirconia is 10-500 nm; after the nano zirconia is granulated, obtaining the granulated zirconia with micron-sized particle size and nano-structure;
(2) weighing raw materials according to weight percentage, wherein the raw materials comprise aramid pulp, granulated zirconia, phenolic resin, graphite and barium sulfate;
(3) putting the aramid pulp into a high-speed mixer, mixing for 1 minute, simultaneously putting the granulated zirconia, the phenolic resin, the graphite and the barium sulfate into the high-speed mixer, and stirring for 3 minutes to obtain a uniformly mixed mixture;
(4) putting the mixture into a steel die, and molding at the temperature of 160-180 ℃ and under the pressure of 10MPa to obtain a molded material sample;
(5) and curing the molded composite material sample in an oven at 160-200 ℃ for 4-6 h to obtain the friction material.
Preferably, in the step (4), 3-6 times of exhaust process is performed in the forming process, and pressure is maintained for 6-10 min under the pressure of 10MPa after the exhaust is completed.
The preparation process of the embodiment of the invention is simple and easy to operate, the nano structure is introduced into the resin-based friction material by the granulated zirconia, the advantage of the nano structure is introduced into the friction material, and meanwhile, the zirconia particles with micron-sized particle size are easy to disperse, so that the uniformity of mixed materials is facilitated, and the stability of the friction coefficient of the friction material is further improved; the brake can be widely applied to the fields of automobiles, engineering machinery and the like which need transmission and braking.
Example two
And (3) taking 0, 5%, 10% and 20% of the granulated zirconia and the same amount of phenolic resin, aramid pulp, graphite and barium sulfate to respectively prepare the friction material according to the preparation method of the embodiment one, and measuring the friction coefficient, the heat fading resistance rate and the recovery rate of the prepared friction material.
Referring to fig. 2 and 3, the friction coefficient of the resin-based friction material added with 5% or 10% of the granulated zirconia is obviously higher and more stable than that of the friction material without the granulated zirconia; meanwhile, the content of the granulated zirconia is not suitable to be excessively added; the coefficient of friction recovery after the temperature rise of the added granulated zirconia is obviously better.
EXAMPLE III
The embodiment of the invention provides a resin-based friction material filled with granulated zirconia, which comprises the following components in percentage by weight: 5% of granulated zirconia, 15% of phenolic resin, 20% of aramid pulp, 10% of graphite and 50% of barium sulfate.
Preferably, the diameter of the nano zirconia is 50 nm; the grain diameter of the granulated zirconia is 30 mu m; the rest is the same as the first embodiment.
Example four
The embodiment of the invention provides a resin-based friction material filled with granulated zirconia, which comprises the following components in percentage by weight: 10% of granulated zirconia, 18% of phenolic resin, 22% of aramid pulp, 10% of graphite and 40% of barium sulfate.
Preferably, the diameter of the nano zirconia is 10 nm; the grain diameter of the granulated zirconia is 5 mu m; the rest is the same as the first embodiment.
EXAMPLE five
The embodiment of the invention provides a resin-based friction material filled with granulated zirconia, which comprises the following components in percentage by weight: 15% of granulated zirconia, 15% of phenolic resin, 25% of aramid pulp, 10% of graphite and 35% of barium sulfate.
Preferably, the diameter of the nano zirconia is 500 nm; the grain diameter of the granulated zirconia is 50 mu m; the rest is the same as the first embodiment.
EXAMPLE six
The embodiment of the invention provides a resin-based friction material filled with granulated zirconia, which comprises the following components in percentage by weight: 10% of granulated zirconia, 15% of phenolic resin, 25% of aramid pulp, 10% of graphite and 40% of barium sulfate.
Preferably, the diameter of the nano zirconia is 200 nm; the grain diameter of the granulated zirconia is 40 mu m; the rest is the same as the first embodiment.
EXAMPLE seven
The embodiment of the invention provides a resin-based friction material filled with granulated zirconia, which comprises the following components in percentage by weight: 10% of granulated zirconia, 12% of phenolic resin, 20% of aramid pulp, 10% of graphite and 48% of barium sulfate.
Preferably, the diameter of the nano zirconia is 100 nm; the grain diameter of the granulated zirconia is 20 mu m; the rest is the same as the first embodiment.
Example eight
The friction materials of examples three to seven and the friction materials to which the granulated zirconia was not added were measured for the friction coefficient and the wear rate in the temperature increasing process and the friction coefficient in the temperature decreasing process, respectively, and the measurement results are shown in the following tables.
TABLE-TEMPERATURE MEASUREMENT COEFFICIENT COMPARISON/FORMAT
TABLE II temperature rise wear rate comparison
Comparison of Friction coefficients in the Cooling Process of Table III
As can be seen from the table I and the table III, the resin-based friction material added with the granulated zirconia has a friction coefficient range of 0.43-0.54 in the temperature rising and cooling processes, and is relatively stable; the friction coefficient of the resin-based friction material without the addition of the granulated zirconia in the processes of temperature rising and temperature lowering is smaller than that of the resin-based friction material with the addition of the granulated zirconia; as can be seen from the table II, the wear rates of the friction material and the friction material in the temperature rising process are similar, which shows that the friction material of the embodiment of the invention has stable friction coefficient and can be widely applied to transmission and braking workpieces.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A resin-based friction material filled with granulated zirconia is characterized in that: the paint consists of the following components in percentage by weight: 5-25% of granulated zirconia, 12-18% of phenolic resin, 15-25% of aramid pulp, 5-10% of graphite and 35-55% of barium sulfate; the diameter of the granulated zirconia is 5-50 mu m;
the preparation method of the resin-based friction material filled with the granulated zirconia comprises the following steps:
(1) preparing granulated zirconia by adopting nano zirconia, wherein the particle size of the nano zirconia is 10-500 nm; after the nano zirconia is granulated, obtaining the granulated zirconia with micron-sized particle size and nano-structure;
(2) weighing raw materials according to weight percentage, wherein the raw materials comprise aramid pulp, granulated zirconia, phenolic resin, graphite and barium sulfate;
(3) putting the aramid pulp into a high-speed mixer, mixing for 1 minute, simultaneously putting the granulated zirconia, the phenolic resin, the graphite and the barium sulfate into the high-speed mixer, and stirring for 3 minutes to obtain a uniformly mixed mixture;
(4) putting the mixture into a steel die, and molding at the temperature of 160-180 ℃ and under the pressure of 10MPa to obtain a molded material sample;
(5) and curing the molded composite material sample in an oven at 160-200 ℃ for 4-6 h to obtain the friction material.
2. A pelletized zirconia filled resin based friction material as defined in claim 1 wherein: the paint consists of the following components in percentage by weight: 5% of granulated zirconia, 15% of phenolic resin, 20% of aramid pulp, 10% of graphite and 50% of barium sulfate; the particle size of the granulated zirconia was 30 μm.
3. A pelletized zirconia filled resin based friction material as defined in claim 1 wherein: the paint consists of the following components in percentage by weight: 10% of granulated zirconia, 18% of phenolic resin, 22% of aramid pulp, 10% of graphite and 40% of barium sulfate; the particle size of the granulated zirconia was 5 μm.
4. A pelletized zirconia filled resin based friction material as defined in claim 1 wherein: the paint consists of the following components in percentage by weight: 15% of granulated zirconia, 15% of phenolic resin, 25% of aramid pulp, 10% of graphite and 35% of barium sulfate; the particle size of the granulated zirconia was 50 μm.
5. A pelletized zirconia filled resin based friction material as defined in claim 1 wherein: the paint consists of the following components in percentage by weight: 10% of granulated zirconia, 15% of phenolic resin, 25% of aramid pulp, 10% of graphite and 40% of barium sulfate; the particle size of the granulated zirconia was 40 μm.
6. A pelletized zirconia filled resin based friction material as defined in claim 1 wherein: in the step (1), the particle size of the nano zirconia is 10nm, 50nm, 100nm, 200nm or 500 nm.
7. A pelletized zirconia filled resin based friction material as defined in claim 1 wherein: in the step (4), 3-6 times of exhaust process is performed in the forming process, and pressure is maintained for 6-10 min under the pressure of 10MPa after the exhaust is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710534573.6A CN107353638B (en) | 2017-07-03 | 2017-07-03 | Resin-based friction material filled with granulated zirconia and preparation method thereof |
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| CN201710534573.6A CN107353638B (en) | 2017-07-03 | 2017-07-03 | Resin-based friction material filled with granulated zirconia and preparation method thereof |
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| CN107353638B true CN107353638B (en) | 2020-07-07 |
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| CN109401304A (en) * | 2018-09-20 | 2019-03-01 | 中国地质大学（武汉） | A kind of wear-resistant resin base frication material and preparation method thereof of expanded graphite filling |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992769A (en) * | 2014-05-05 | 2014-08-20 | 浙江杭摩欧亿汽车零部件有限公司 | Copper-free high-performance environment-friendly type friction material for saloon car and preparation method thereof |
| CN104109342A (en) * | 2014-07-18 | 2014-10-22 | 盐城工学院 | Low-noise heat-fade-resistant resin-base friction material |
| CN104130748A (en) * | 2014-07-18 | 2014-11-05 | 盐城工学院 | Resin-based friction material |
| CN106051004A (en) * | 2016-06-29 | 2016-10-26 | 芜湖德业摩擦材料有限公司 | Dedicated friction material for car brake pad |
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- 2017-07-03 CN CN201710534573.6A patent/CN107353638B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992769A (en) * | 2014-05-05 | 2014-08-20 | 浙江杭摩欧亿汽车零部件有限公司 | Copper-free high-performance environment-friendly type friction material for saloon car and preparation method thereof |
| CN104109342A (en) * | 2014-07-18 | 2014-10-22 | 盐城工学院 | Low-noise heat-fade-resistant resin-base friction material |
| CN104130748A (en) * | 2014-07-18 | 2014-11-05 | 盐城工学院 | Resin-based friction material |
| CN106051004A (en) * | 2016-06-29 | 2016-10-26 | 芜湖德业摩擦材料有限公司 | Dedicated friction material for car brake pad |
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