CN111171568A - Preparation method of fluorine-containing and sulfone-containing polyimide-based friction material - Google Patents
Preparation method of fluorine-containing and sulfone-containing polyimide-based friction material Download PDFInfo
- Publication number
- CN111171568A CN111171568A CN202010154317.6A CN202010154317A CN111171568A CN 111171568 A CN111171568 A CN 111171568A CN 202010154317 A CN202010154317 A CN 202010154317A CN 111171568 A CN111171568 A CN 111171568A
- Authority
- CN
- China
- Prior art keywords
- fluorine
- sulfone
- polyimide
- friction material
- silicon carbide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Braking Arrangements (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation method of a fluorine-containing sulfone-containing polyimide-based friction material. The friction performance modifier is prepared by using fluorine-containing sulfone-containing polyimide as a matrix, modified sisal cellulose microcrystals as reinforcing fibers, nano silicon carbide as an inorganic filler and graphite as a friction performance modifier. The components are mixed by a ball mill according to a certain proportion, then are molded by hot die pressing, and are cooled and demoulded to prepare the friction material containing the fluorine and the sulfone polyimide. The method is simple to operate, and the prepared fluorine-containing sulfone-containing polyimide-based friction material has high thermal stability and high wear resistance and is expected to be potentially applied in extreme environments such as high temperature, high pressure, low pressure, high speed, humidity and the like.
Description
Technical Field
The invention relates to a preparation method of a fluorine-containing sulfone-containing polyimide-based friction material, belonging to the field of polymer-based friction materials and preparation methods thereof.
Background
The polymer-based friction material has become a mainstream product of the current friction material due to the advantages of designability, light weight, good processing technology, low braking noise, low price and the like of the structure, and is widely applied to the fields of transportation tools, electronic and electric appliances, engineering mechanical equipment and the like.
Polymer-based friction materials are generally composed of a matrix resin, reinforcing fibers, a friction property modifier, a filler, and the like. The matrix resin is the most key component of the polymer-based friction material, and has the function of bonding all the components together to obtain the friction material which is uniformly distributed and compact, provides a base for the mechanical property and the friction property of the whole friction material and is a transmission medium of load in the material. Under the friction braking, the surface of the material is rapidly heated, and the phenomenon of 'heat accumulation' on the surface of matrix resin is serious (the heat conductivity coefficient of the matrix resin is only 1/300 of that of steel and 1/500-l/800 of copper): on one hand, the friction coefficient is reduced, and the wear rate is obviously increased to form a heat fading phenomenon; on the other hand, because the matrix resin is most sensitive to heat in the friction material components, the high shear force generated during braking may cause the breakage of macromolecular chains, so that the matrix resin is subjected to thermal cracking in different degrees, and the product efficacy, the working efficiency, the service life and the like of the friction material are influenced. Therefore, the heat stability and the wear resistance of the matrix resin are the key points for preparing the high-performance polymer-based friction material, and meanwhile, on the premise of ensuring the mechanical property of the friction material, the heat conductivity coefficient of the material is improved as much as possible, the stability of the friction property is maintained, and the wear rate is reduced.
Polyimide is a high heat-resistant polymer matrix material developed in the 50 th of the 20 th century, and the excellent physical and mechanical properties, high temperature resistance, antifriction, self-lubricating, wear-resistant and other properties of the polyimide are favored in the field of friction materials. However, the polyimide-based friction material matrix resin is generally common commercial resin, and when the working temperature and humidity are higher, the friction braking action causes water and imide groups in a polymer chain to form hydrogen bonds, so that the heat resistance and wear resistance of the material are reduced.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a preparation method of a fluorine-containing sulfone-containing polyimide-based friction material.
The method comprises the following specific steps:
(1) weighing the following raw materials in percentage by weight: 50-70% of fluorine-containing sulfone-containing polyimide molding powder, 15-30% of modified sisal cellulose microcrystal, 3-10% of nano silicon carbide and 10-20% of graphite, wherein the sum of the weight percentages of the raw materials is 100%.
(2) Uniformly mixing the fluorine-containing sulfone-containing polyimide molding powder weighed in the step (1), modified sisal cellulose microcrystal, nano silicon carbide and graphite, mechanically blending through a ball mill, carrying out hot die pressing for molding at the die pressing temperature of 300-360 ℃ under the pressure of 8-15 MPa for 0.5-2 h, cooling to 180-220 ℃, and demolding to obtain the fluorine-containing sulfone-containing polyimide friction material.
The particle size of the fluorine-containing sulfone-containing polyimide molding powder is 40-80 mu m, and the structure of the fluorine-containing sulfone-containing polyimide is one of the following structures:
wherein Ar is one of the following 13 aromatic structures:
the modified sisal cellulose microcrystal is a sisal cellulose microcrystal with the surface modified by the silicon carbide nano crystal whiskers, and the length of the modified sisal cellulose microcrystal is 50-150 mu m; the diameter was 10 μm.
The particle size of the nano silicon carbide is 30-60 nm.
The particle size of the graphite is 50-70 mu m.
The invention has the advantages that: the novel fluorine-containing sulfone-containing polyimide is selected as matrix resin, wherein fluorine atoms have the characteristics of high electronegativity, low surface energy, low molar polarization degree and the like, so that the matrix resin is endowed with excellent thermal stability, low moisture absorption rate and high wear resistance, meanwhile, a strong polar group sulfone group in a polymer chain and an ortho-position benzene ring form a stable and rigid integrated conjugated structure, so that the matrix resin is endowed with the characteristics of absorbing a large amount of heat energy in a friction process without breaking a main chain, the thermal stability is improved, the binding power is enhanced, the wear rate is reduced and the like; the modified sisal cellulose microcrystal SFMC-SiC is used as microfiber load bearing, and the SFMC-SiC/SiC synergistic composite effect improves the uniform dispersion of the heat-conducting filler in the resin matrix, reduces the interface thermal resistance of the heat-conducting filler and the resin matrix, promotes the formation of a heat-conducting network in matrix resin, and realizes the high heat-conducting performance of the composite material. The material has high thermal stability, high wear resistance and good heat conducting performance.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The particle size of the fluorine-containing sulfone-containing polyimide molding powder selected in the following examples is 40-80 μm; the length of the modified sisal cellulose microcrystal is 50-150 mu m, and the diameter of the modified sisal cellulose microcrystal is 10 mu m; the grain size of the nano silicon carbide is 30-60 nm; the particle size of the graphite is 50-70 μm.
Example 1:
a friction material containing fluorine and containing a sulfone polyimide group comprises the following components in percentage by weight:
fluorine-containing sulfone-containing polyimide molding powder: 60 percent; modified sisal cellulose microcrystals: 20 percent; nano silicon carbide: 5 percent; graphite: 15 percent.
(1) Uniformly mixing the polyimide molding powder, the modified sisal cellulose microcrystal, the nano silicon carbide and the graphite in proportion.
(2) And (2) blending the components uniformly mixed in the step (1) through a ball mill, carrying out hot die pressing for forming, keeping the die pressing temperature at 340 ℃ and the pressure at 12 MPa for 1 h, cooling to 200 ℃, and demoulding to obtain the fluorine-containing sulfone-containing polyimide-based friction material.
Example 2:
a friction material containing fluorine and containing a sulfone polyimide group comprises the following components in percentage by weight:
fluorine-containing sulfone-containing polyimide molding powder: 60 percent; modified sisal cellulose microcrystals: 25 percent; nano silicon carbide: 5 percent; graphite: 10 percent.
(1) Uniformly mixing the polyimide molding powder, the modified sisal cellulose microcrystal, the nano silicon carbide and the graphite in proportion.
(2) And (2) blending the components uniformly mixed in the step (1) through a ball mill, carrying out hot die pressing for forming, keeping the die pressing temperature at 340 ℃ and the pressure at 12 MPa for 1 h, cooling to 200 ℃, and demoulding to obtain the fluorine-containing sulfone-containing polyimide-based friction material.
Example 3:
a friction material containing fluorine and containing a sulfone polyimide group comprises the following components in percentage by weight:
fluorine-containing sulfone-containing polyimide molding powder: 50 percent; modified sisal cellulose microcrystals: 30 percent; nano silicon carbide: 5 percent; graphite: 15 percent.
(1) Uniformly mixing the polyimide molding powder, the modified sisal cellulose microcrystal, the nano silicon carbide and the graphite in proportion.
(2) And (2) blending the components uniformly mixed in the step (1) through a ball mill, carrying out hot die pressing for forming, keeping the die pressing temperature at 340 ℃ and the pressure at 12 MPa for 1 h, cooling to 200 ℃, and demoulding to obtain the fluorine-containing sulfone-containing polyimide-based friction material.
Example 4:
a friction material containing fluorine and containing a sulfone polyimide group comprises the following components in percentage by weight:
fluorine-containing sulfone-containing polyimide molding powder: 50 percent; modified sisal cellulose microcrystals: 25 percent; nano silicon carbide: 5 percent; graphite: 20 percent.
(1) Uniformly mixing the polyimide molding powder, the modified sisal cellulose microcrystal, the nano silicon carbide and the graphite in proportion.
(2) And (2) blending the components uniformly mixed in the step (1) through a ball mill, carrying out hot die pressing for forming, keeping the die pressing temperature at 340 ℃ and the pressure at 12 MPa for 1 h, cooling to 200 ℃, and demoulding to obtain the fluorine-containing sulfone-containing polyimide-based friction material.
Claims (1)
1. A preparation method of a fluorine-containing sulfone-containing polyimide-based friction material is characterized by comprising the following specific steps:
(1) weighing the following raw materials in percentage by weight: 50-70% of fluorine-containing sulfone-containing polyimide molding powder, 15-30% of modified sisal cellulose microcrystal, 3-10% of nano silicon carbide and 10-20% of graphite, wherein the sum of the weight percentages of the raw materials is 100%;
(2) uniformly mixing the fluorine-containing sulfone-containing polyimide molding powder weighed in the step (1), modified sisal cellulose microcrystal, nano silicon carbide and graphite, mechanically blending through a ball mill, carrying out hot die pressing for molding at the die pressing temperature of 300-360 ℃ and the pressure of 8-15 MPa for 0.5-2 h, cooling to 180-220 ℃, and demolding to obtain the fluorine-containing sulfone-containing polyimide friction material;
the particle size of the fluorine-containing sulfone-containing polyimide molding powder is 40-80 mu m, and the structure of the fluorine-containing sulfone-containing polyimide is one of the following structures:
and
wherein Ar is one of the following 13 aromatic structures:
the modified sisal cellulose microcrystal is a sisal cellulose microcrystal with the surface modified by the silicon carbide nano crystal whiskers, and the length of the modified sisal cellulose microcrystal is 50-150 mu m; the diameter is 10 μm;
the particle size of the nano silicon carbide is 30-60 nm;
the particle size of the graphite is 50-70 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010154317.6A CN111171568A (en) | 2020-03-07 | 2020-03-07 | Preparation method of fluorine-containing and sulfone-containing polyimide-based friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010154317.6A CN111171568A (en) | 2020-03-07 | 2020-03-07 | Preparation method of fluorine-containing and sulfone-containing polyimide-based friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111171568A true CN111171568A (en) | 2020-05-19 |
Family
ID=70653372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010154317.6A Pending CN111171568A (en) | 2020-03-07 | 2020-03-07 | Preparation method of fluorine-containing and sulfone-containing polyimide-based friction material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111171568A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634022A (en) * | 2012-04-10 | 2012-08-15 | 中国科学院化学研究所 | Colorless highly-transparent polyimide film as well as preparation method and application thereof |
| CN102976983A (en) * | 2012-10-25 | 2013-03-20 | 华中科技大学 | Sulfonyl fluorine-containing diamine compound and polyimide film material, and preparation method thereof |
| CN104031387A (en) * | 2014-06-27 | 2014-09-10 | 自贡中天胜新材料科技有限公司 | Self-lubricating elastic wear-resistant polyimide composite material and preparation method thereof |
| CN104987716A (en) * | 2015-06-05 | 2015-10-21 | 苏州珍展科技材料有限公司 | Preparation method for polyimide composite material for automobile |
| CN108117749A (en) * | 2017-12-24 | 2018-06-05 | 桂林理工大学 | The preparation method of polyimides/sisal cellulose crystallite composite material of shape memory |
| CN110396194A (en) * | 2019-09-06 | 2019-11-01 | 株洲时代新材料科技股份有限公司 | Fluorine-containing wear-resisting polyamidoimide material of one kind and preparation method thereof |
| CN110408205A (en) * | 2019-07-26 | 2019-11-05 | 中车青岛四方机车车辆股份有限公司 | A kind of heat-resistant antifriction composition and its preparation method and application |
-
2020
- 2020-03-07 CN CN202010154317.6A patent/CN111171568A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634022A (en) * | 2012-04-10 | 2012-08-15 | 中国科学院化学研究所 | Colorless highly-transparent polyimide film as well as preparation method and application thereof |
| CN102976983A (en) * | 2012-10-25 | 2013-03-20 | 华中科技大学 | Sulfonyl fluorine-containing diamine compound and polyimide film material, and preparation method thereof |
| CN104031387A (en) * | 2014-06-27 | 2014-09-10 | 自贡中天胜新材料科技有限公司 | Self-lubricating elastic wear-resistant polyimide composite material and preparation method thereof |
| CN104987716A (en) * | 2015-06-05 | 2015-10-21 | 苏州珍展科技材料有限公司 | Preparation method for polyimide composite material for automobile |
| CN108117749A (en) * | 2017-12-24 | 2018-06-05 | 桂林理工大学 | The preparation method of polyimides/sisal cellulose crystallite composite material of shape memory |
| CN110408205A (en) * | 2019-07-26 | 2019-11-05 | 中车青岛四方机车车辆股份有限公司 | A kind of heat-resistant antifriction composition and its preparation method and application |
| CN110396194A (en) * | 2019-09-06 | 2019-11-01 | 株洲时代新材料科技股份有限公司 | Fluorine-containing wear-resisting polyamidoimide material of one kind and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113150541B (en) | High-strength high-thermal-conductivity nylon composite material and preparation method thereof | |
| CN104327515A (en) | Graphene-containing silicon rubber heat-conducting composite material and preparation method thereof | |
| CN101928457B (en) | Carbon-based nano cast nylon composite material and in-situ polymerization preparation method thereof | |
| CN109912910B (en) | High-thermal-conductivity insulating polytetrafluoroethylene friction material and preparation method and application thereof | |
| CN109504036B (en) | Micro-nano graphite sheet epoxy resin-based/modified carbon fiber composite material and preparation method thereof | |
| CN103911118A (en) | Polyimide friction material for rotary ultrasonic motor and preparation method of polyimide friction material | |
| Weng et al. | Preparation and properties of boron nitride/epoxy composites with high thermal conductivity and electrical insulation | |
| CN102352035A (en) | Monomer casting nylon composite | |
| Liu et al. | Construction of 3D interconnected and aligned boron nitride nanosheets structures in phthalonitrile composites with high thermal conductivity | |
| CN103319824B (en) | Method for preparing modified and enhanced polytetrafluoroethylene composite material | |
| CN108203543B (en) | Graphene-reinforced polyimide nanocomposite material and preparation method and application thereof | |
| CN105111693A (en) | Carbon nano composite fiber material and preparation method thereof | |
| CN111171568A (en) | Preparation method of fluorine-containing and sulfone-containing polyimide-based friction material | |
| CN109294032A (en) | A kind of modified thermally conductive PE composite material and preparation method of multiple elements design particle filled composite | |
| CN110893466B (en) | Graphene-titanium-aluminum-carbon composite wear-resistant material | |
| WO2018233349A1 (en) | Yaw brake block and preparation method therefor | |
| CN109867956B (en) | Rare earth and graphene oxide synergistically modified polyimide nanocomposite, application and preparation method | |
| CN106272117B (en) | A kind of resinoid bond cutting blade and preparation method thereof | |
| CN112538177B (en) | Quick freezing preparation method of carbon material oriented heat-conducting interface material | |
| CN109370220A (en) | A kind of graphene modified polyphenyl thioether composite material and preparation method | |
| CN109181208B (en) | Polyformaldehyde composite material and preparation method thereof | |
| CN109206895B (en) | Preparation method of heat-conducting and insulating aromatic nylon alloy material | |
| Li et al. | An elastomeric composite with tunable thermal and mechanical properties via liquid metal-flake graphite multiphase fillers | |
| CN111187514A (en) | Insulating and heat-conducting PPS composite material and preparation method thereof | |
| CN114957829B (en) | Boron nitride composite material containing coconut shell carbon and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200519 |
|
| RJ01 | Rejection of invention patent application after publication |