CN112359637A - Preparation method of polyimide fiber reinforced paper-based friction material - Google Patents
Preparation method of polyimide fiber reinforced paper-based friction material Download PDFInfo
- Publication number
- CN112359637A CN112359637A CN202011202520.2A CN202011202520A CN112359637A CN 112359637 A CN112359637 A CN 112359637A CN 202011202520 A CN202011202520 A CN 202011202520A CN 112359637 A CN112359637 A CN 112359637A
- Authority
- CN
- China
- Prior art keywords
- paper
- friction material
- based friction
- preparation
- polyimide fiber
- 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
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/26—Polyamides; Polyimides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/02—Synthetic cellulose fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/46—Non-siliceous fibres, e.g. from metal oxides
- D21H13/50—Carbon fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/48—Condensation polymers of aldehydes or ketones with phenols
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/65—Acid compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for fibres
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a preparation method of a polyimide fiber reinforced paper-based friction material, and belongs to the technical field of friction materials. Adding chopped carbon fibers, cellulose fibers, polyimide fibers, a friction performance regulator and a filler into a fiber fluffer for pulping and dispersing, then pouring the pulp into a paper sheet former, adding a dispersant and a flocculating agent, and making raw paper; and then pre-impregnating the dried base paper with a rare earth solution, drying, then impregnating with a resin solution, and finally performing hot press molding to obtain the base paper. The invention overcomes the problems of higher surface inertia of polyimide fiber and poor interface bonding performance with other components, effectively improves the interface bonding performance of the material, reduces the wear rate, improves the stability of the dynamic friction coefficient, improves the heat resistance to a certain extent, and obtains the paper-based friction material with better comprehensive performance.
Description
Technical Field
The invention belongs to the technical field of friction materials, and particularly relates to a preparation method of a polyimide fiber reinforced paper-based friction material.
Background
Paper-based friction materials are wet friction materials prepared by a paper-making process and impregnated with resin or rubber, and are commonly used in transmission and braking devices under oil-lubricated conditions. The paper-based friction material occupies an irreplaceable position in the field of friction materials due to the excellent performances of small paired wear, low noise, stable braking process, strong torque transmission capacity and the like. However, the further application of the composite material is limited by the problems of high wear rate, unstable friction coefficient and the like caused by poor interface bonding performance among the components. The fiber is used as an important component of the paper-based friction material, plays a role in enhancing the bearing in the material and has important influence on the performance of the material. Polyimide fiber is one member of a family of synthetic aromatic fibers, and has excellent mechanical properties, good thermal stability, good dielectric properties, chemical inertness, self-lubricating ability, excellent tribological properties and the like. In addition, the density of the polyimide fiber was only 1.41g/cm3The weight-reducing material is lower than aramid fiber, glass fiber, carbon fiber, mineral fiber and the like, so that when the weight-reducing material is used as a reinforcing material, a good light weight effect can be generated, and sustainable development is facilitated; in addition, the polyimide fiber only utilizes the electricity, the heat and the force in the application aspectIn terms of chemical properties and the like, the research on the tribological properties of the polyimide fiber is not available, and the polyimide fiber is particularly applied to wet paper-based friction materials.
The rare earth is called as industrial vitamin, has unique 4f electronic structure, rich energy level conversion and excellent interface performance, and can play roles of toughening, strengthening, improving the interface performance, improving the heat resistance and the like when being applied to the composite material.
Document 1, "chinese patent with patent publication No. CN106544924A," discloses a method for preparing an alumina fiber reinforced paper-based friction material. The alumina fiber is applied to the paper-based friction material, and the alumina fiber belongs to inorganic fiber and has low interface bonding strength with organic resin; in addition, the abrasion of the material is aggravated by hard particles generated after the alumina fiber is abraded, and the service life is shortened.
Document 2, "chinese patent publication No. CN102747634A," discloses a method for producing a modified polyimide fiber paper. The polyimide fiber is first treated in KOH solution, wet formed to make base paper and finally soaked in resin solution.
For the paper-based friction material, the improvement of the interface bonding force among the components can improve the mechanical property of the material and is also the key for reducing the wear rate. The polyimide fiber has smooth surface and poor interface bonding performance with other components, and the application of the polyimide fiber in the aspect of paper-based friction materials is limited to a certain extent, so that the problem of interface bonding between the fiber and other components is the most important problem in order to better apply the polyimide fiber to the paper-based friction materials.
Disclosure of Invention
The technical problem solved by the invention is as follows: the invention aims to provide a preparation method of a polyimide fiber reinforced paper-based friction material, which solves the problems of high surface inertia of polyimide fibers and poor interface bonding performance with other components, greatly reduces the wear rate of the prepared paper-based friction material, improves the thermal performance and friction coefficient stability of the material, and also expands the application field of the polyimide fibers
The technical scheme of the invention is as follows: a preparation method of a polyimide fiber reinforced paper-based friction material comprises the following steps:
step 1: respectively weighing 12-16% of polyimide fiber, 4-8% of chopped carbon fiber, 10-15% of cellulose fiber, 30-40% of binder, 1-5% of rare earth, 25-35% of filler and friction performance regulator according to the mass percent, wherein the sum of the mass percent is 100%;
step 2: adding polyimide fibers, chopped carbon fibers, cellulose fibers, a filler and a friction performance regulator into water, pulping and dispersing, sequentially adding a dispersant and a flocculant to obtain a paper-based friction material preform, and drying the paper-based friction material preform in an oven;
and step 3: immersing the dried paper-based friction material preform obtained in the step 2 into a rare earth solution, volatilizing ethanol, and then immersing the preform into a resin solution and drying;
and 4, step 4: and (4) carrying out hot-pressing curing on the prefabricated body obtained in the step (3) to obtain the paper-based friction material.
The further technical scheme of the invention is as follows: before resin impregnation, a rare earth solution is impregnated into the preform, wherein the rare earth solution is an ethanol solution of rare earth chloride.
The further technical scheme of the invention is as follows: the dispersing agent and the flocculating agent in the step 2 are OP-10 and cationic polyacrylamide respectively.
The further technical scheme of the invention is as follows: the filler and friction performance regulator in the step 1 comprises one or more of alumina, barium sulfate, fluororubber powder, chromite, mineral powder, graphite and fluorite powder.
The further technical scheme of the invention is as follows: the rare earth chloride used can be lanthanum chloride, cerium chloride or any one of lanthanum chloride and cerium chloride.
The further technical scheme of the invention is as follows: the resin solution in the step 3 is phenolic resin solution modified by cashew nut shell oil, and the used solvent is absolute ethyl alcohol with the concentration of 20%.
The further technical scheme of the invention is as follows: the technological parameters of the hot-pressing solidification in the step 4 are as follows: the temperature is 140 ℃ and 160 ℃, the pressure is 5-10Mpa, and the time is 5-10 min.
The further technical scheme of the invention is as follows: the thickness of the paper-based friction material is 0.6-1.0 mm.
Effects of the invention
The invention has the technical effects that: the invention provides a preparation method of a polyimide fiber reinforced paper-based friction material, and aims to solve the problem of poor interface bonding performance of polyimide fibers and various components, the paper-based friction material preform is pre-impregnated with a rare earth solution, so that the abrasion of the material is reduced, the stability of the dynamic friction coefficient is improved, the shear strength of the material is improved, and the thermal property of the material is optimized. In addition, the method has simple process and lower cost, expands the application field of the polyimide fiber and is beneficial to sustainable development.
Drawings
FIG. 1 is a graph of shear strength of a paper-based friction material of a control sample and impregnated with different amounts of rare earth;
FIG. 2 is a graph of friction coefficients for a control sample and a paper-based friction material impregnated with different amounts of rare earth;
FIG. 3 is a graph of wear rates for a control sample and a paper-based friction material impregnated with different amounts of rare earth;
FIG. 4 is a graph of the thermal conductivity of a paper-based friction material without impregnation of a rare earth solution and with impregnation of different contents of rare earth.
Detailed Description
Referring to fig. 1-4, a preparation method of a polyimide fiber reinforced paper-based friction material is characterized by comprising the following steps:
step 1: respectively weighing 12-16% of polyimide fiber, 4-8% of chopped carbon fiber, 10-15% of cellulose fiber, 30-40% of binder, 1-5% of rare earth, 25-35% of filler and friction performance regulator according to the mass percentage, wherein the sum of the mass percentages is 100%;
step 2: adding polyimide fibers, chopped carbon fibers, cellulose fibers, a filler and a friction performance regulator into water, pulping and dispersing by using a defibrator, then pouring into a paper sheet forming machine, adding a dispersing agent and a flocculating agent, manufacturing a paper-based friction material prefabricated body by a paper-based friction material manufacturing machine, and drying the prefabricated body in an oven at 70 ℃ for 1 h;
and step 3: immersing the dried preform obtained in the step 2 into a rare earth solution, placing the rare earth solution in a room temperature environment to volatilize ethanol, and then immersing the preform into a resin solution and drying the preform at room temperature;
and 4, step 4: and (4) carrying out hot-pressing curing on the prefabricated body obtained in the step (3) on a flat vulcanizing machine to obtain the paper-based friction material.
2. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: before resin impregnation, a rare earth solution is impregnated into the preform, wherein the rare earth solution is an ethanol solution of rare earth chloride.
3. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the dispersing agent and the flocculating agent in the step 2 are OP-10 and cationic polyacrylamide respectively.
4. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the friction performance regulator and the filler in the step 1 comprise one or more of alumina, barium sulfate, fluororubber powder, chromite, mineral powder, graphite and fluorite powder.
5. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the rare earth chloride used can be lanthanum chloride, cerium chloride or any one of lanthanum chloride and cerium chloride.
6. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the resin solution in the step 3 is phenolic resin solution modified by cashew nut shell oil, and the used solvent is absolute ethyl alcohol with the concentration of 20%.
7. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the technological parameters of the hot-pressing solidification in the step 4 are as follows: the temperature is 140-.
The preparation method comprises the following specific steps:
step 1: respectively weighing 12-16% of polyimide fiber, 4-8% of chopped carbon fiber, 10-15% of cellulose fiber, 30-40% of binder, 1-5% of rare earth, 25-35% of filler and friction performance regulator according to the mass percentage, wherein the sum of the mass percentages is 100%;
step 2: adding polyimide fibers, chopped carbon fibers, cellulose fibers, a filler and a friction performance regulator into water, pulping and dispersing by using a defibrator, then pouring into a paper sheet forming machine, adding a dispersant and a flocculant, making a paper-based friction material preform, placing the paper-based friction material preform into an oven, and drying for 1h at 70 ℃;
and step 3: immersing the dried preform obtained in the step 2 into a rare earth solution, placing the rare earth solution in a room temperature environment to volatilize ethanol, and then immersing the preform into a resin solution and drying the preform at room temperature;
and 4, step 4: and (4) carrying out hot-pressing curing on the prefabricated body obtained in the step (3) on a flat vulcanizing machine to obtain the paper-based friction material.
The preparation process includes soaking RE solution in ethanol solution of RE chloride in the prefabricated body before resin soaking.
The dispersing agent and the flocculating agent in the step 2 are OP-10 and cationic polyacrylamide respectively.
The friction performance regulator and the filler in the step 1 comprise one or more of alumina, barium sulfate, fluororubber powder, chromite, mineral powder, graphite and fluorite powder.
The rare earth chloride used can be lanthanum chloride, cerium chloride or any one of lanthanum chloride and cerium chloride.
The resin solution in the step 3 is phenolic resin solution modified by cashew nut shell oil, and the used solvent is absolute ethyl alcohol with the concentration of 20%.
The technological parameters of the hot-pressing solidification in the step 4 are as follows: the temperature is 140-.
The invention will now be further elucidated with reference to the detailed description and the accompanying drawings:
the first embodiment is as follows:
step 1: respectively weighing 4.2g of fiber reinforcement, including 1.6g of cellulose fiber, 0.8g of carbon fiber and 1.8g of polyimide fiber; 4.9g of filler and friction performance regulator, mainly comprising 0.4g of alumina, 0.6g of chromite, 0.5g of graphite, 0.4g of fluorite powder, 0.5g of mineral powder, 0.5g of barium sulfate and 2g of fluororubber powder; 4.76g of cashew nut shell oil modified phenolic resin powder and 0.14g of lanthanum chloride heptahydrate;
step 2: adding the weighed polyimide fibers, chopped carbon fibers, cellulose fibers, fillers and a friction performance regulator into water, pulping and dispersing for 15min at the speed of 2000r/min by using a defibrator, pouring the slurry into a paper sheet forming machine, adding 2ml of a dispersing agent and 5ml of a flocculating agent, making a paper-based friction material preform, and drying for 1h in an oven at the temperature of 70 ℃;
and step 3: preparing the phenolic resin powder in the step 1 into an ethanol solution with the mass fraction of 20%, and dissolving lanthanum chloride heptahydrate in 25g of absolute ethanol;
and 4, step 4: immersing the dried preform obtained in the step 2 into the prepared rare earth solution, placing the rare earth solution in a room temperature environment for drying, and then immersing the preform into the prepared phenolic resin solution and drying the preform at the room temperature;
and 5: and (4) carrying out hot-pressing curing on the prefabricated body obtained in the step (4) on a flat vulcanizing machine, wherein the parameters are 160 ℃ and the curing is carried out for 5min under 5Mpa, so as to obtain the paper-based friction material with the thickness of 0.8 mm.
The second embodiment is as follows: 4.62g of cashew nut shell oil modified phenolic resin powder and 0.28g of lanthanum chloride heptahydrate are weighed, and the other steps are consistent with the implementation method.
The third concrete embodiment: 4.48g of cashew nut shell oil modified phenolic resin powder and 0.42g of lanthanum chloride heptahydrate are weighed, and the other steps are consistent with the implementation method.
The fourth concrete embodiment: 4.34g of cashew nut shell oil modified phenolic resin powder and 0.56g of lanthanum chloride heptahydrate are weighed, and the other steps are consistent with the implementation method.
The fifth concrete embodiment: 4.20g of cashew nut shell oil modified phenolic resin powder and 0.70g of lanthanum chloride heptahydrate are weighed, and the rest is consistent with the implementation method.
Preparation of a comparative sample: 4.90g of cashew nut shell oil modified phenolic resin powder is weighed, and is not soaked in rare earth solution, and the rest is consistent with the implementation method.
The first to fifth examples and the comparative sample are subjected to performance characterization, and specific characterization contents and methods are as follows:
the friction and wear performance of the sample is researched by adopting a multifunctional reciprocating friction and wear testing machine (CFT-I); performing TG-DTG analysis (NETZSCH TG 209F3) on the sample by using a thermogravimetric analyzer; the thermal conductivity of the samples was measured with a laser thermal conductivity meter (LFA427 NETZSCH, Germany); and testing the shearing performance of the sample by adopting a mechanical electronic universal testing machine.
FIG. 1 is a graph of shear strength of comparative samples and paper-based friction materials impregnated with different amounts of rare earth solutions. It can be seen from the figure that when the impregnated rare earth content reaches 3 wt%, the shear strength is improved by about 32.5% compared with the comparative sample, which indicates that the impregnated rare earth content can greatly improve the mechanical properties of the paper-based friction material within a certain range.
Fig. 2 and 3 are graphs of friction coefficient and wear rate of a comparative sample and a paper-based friction material impregnated with different contents of rare earth solutions, and it can be seen from the graphs that when the rare earth impregnation amount is 4 wt%, the paper-based friction material has a larger friction coefficient and a minimum wear rate, and the wear rate is reduced by 80% compared with the comparative sample, and the service life of the material is prolonged.
FIG. 4 is a heat-conducting property diagram of a comparison sample and a paper-based friction material impregnated with rare earth solutions with different contents, and it can be seen from the diagram that when the rare earth impregnation amount is 3 wt%, the material has the maximum heat conductivity and thermal diffusion coefficient, which is beneficial to the conduction of the heat inside the material, and the temperature of each region can also reach the same value quickly, so that the thermal wear of the material is reduced, and the occurrence of the heat fading phenomenon is prevented.
Claims (8)
1. A preparation method of a polyimide fiber reinforced paper-based friction material is characterized by comprising the following steps:
step 1: respectively weighing 12-16% of polyimide fiber, 4-8% of chopped carbon fiber, 10-15% of cellulose fiber, 30-40% of binder, 1-5% of rare earth, 25-35% of filler and friction performance regulator according to the mass percent, wherein the sum of the mass percent is 100%;
step 2: adding polyimide fibers, chopped carbon fibers, cellulose fibers, a filler and a friction performance regulator into water, pulping and dispersing, sequentially adding a dispersant and a flocculant to obtain a paper-based friction material preform, and drying the paper-based friction material preform in an oven;
and step 3: immersing the dried paper-based friction material preform obtained in the step 2 into a rare earth solution, volatilizing ethanol, and then immersing the preform into a resin solution and drying;
and 4, step 4: and (4) carrying out hot-pressing curing on the prefabricated body obtained in the step (3) to obtain the paper-based friction material.
2. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: before resin impregnation, a rare earth solution is impregnated into the preform, wherein the rare earth solution is an ethanol solution of rare earth chloride.
3. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the dispersing agent and the flocculating agent in the step 2 are OP-10 and cationic polyacrylamide respectively.
4. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the filler and friction performance regulator in the step 1 comprises one or more of alumina, barium sulfate, fluororubber powder, chromite, mineral powder, graphite and fluorite powder.
5. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the rare earth chloride used can be lanthanum chloride, cerium chloride or any one of lanthanum chloride and cerium chloride.
6. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the resin solution in the step 3 is phenolic resin solution modified by cashew nut shell oil, and the used solvent is absolute ethyl alcohol with the concentration of 20%.
7. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the technological parameters of the hot-pressing solidification in the step 4 are as follows: the temperature is 140 ℃ and 160 ℃, the pressure is 5-10Mpa, and the time is 5-10 min.
8. The preparation method of the polyimide fiber reinforced paper-based friction material according to claim 1, characterized in that: the thickness of the paper-based friction material is 0.6-1.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202520.2A CN112359637A (en) | 2020-11-02 | 2020-11-02 | Preparation method of polyimide fiber reinforced paper-based friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202520.2A CN112359637A (en) | 2020-11-02 | 2020-11-02 | Preparation method of polyimide fiber reinforced paper-based friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112359637A true CN112359637A (en) | 2021-02-12 |
Family
ID=74514254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011202520.2A Pending CN112359637A (en) | 2020-11-02 | 2020-11-02 | Preparation method of polyimide fiber reinforced paper-based friction material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112359637A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123162A (en) * | 2021-04-09 | 2021-07-16 | 西北工业大学 | Preparation method of double-substrate paper-based friction material with excellent performance |
| CN114673029A (en) * | 2022-02-28 | 2022-06-28 | 西北工业大学 | Modified carbon fiber reinforced polyimide resin-based wet friction material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007246590A (en) * | 2006-03-14 | 2007-09-27 | Teijin Techno Products Ltd | Friction material |
| CN103541267A (en) * | 2013-10-12 | 2014-01-29 | 陕西科技大学 | Preparation method of rare earth-modified paper base friction material |
| CN106544924A (en) * | 2016-11-23 | 2017-03-29 | 陕西科技大学 | A kind of alumina fibre strengthens the preparation method of paper friction material |
| CN106930138A (en) * | 2017-03-03 | 2017-07-07 | 西北工业大学 | A kind of Graphene is modified paper friction material and preparation method |
| CN110158346A (en) * | 2019-05-31 | 2019-08-23 | 连云港市工业投资集团有限公司 | A kind of polyimide fiber paper based insulation material and preparation method thereof |
| CN110965385A (en) * | 2019-12-24 | 2020-04-07 | 西北工业大学 | Preparation method of pore structure optimized paper-based friction material |
-
2020
- 2020-11-02 CN CN202011202520.2A patent/CN112359637A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007246590A (en) * | 2006-03-14 | 2007-09-27 | Teijin Techno Products Ltd | Friction material |
| CN103541267A (en) * | 2013-10-12 | 2014-01-29 | 陕西科技大学 | Preparation method of rare earth-modified paper base friction material |
| CN106544924A (en) * | 2016-11-23 | 2017-03-29 | 陕西科技大学 | A kind of alumina fibre strengthens the preparation method of paper friction material |
| CN106930138A (en) * | 2017-03-03 | 2017-07-07 | 西北工业大学 | A kind of Graphene is modified paper friction material and preparation method |
| CN110158346A (en) * | 2019-05-31 | 2019-08-23 | 连云港市工业投资集团有限公司 | A kind of polyimide fiber paper based insulation material and preparation method thereof |
| CN110965385A (en) * | 2019-12-24 | 2020-04-07 | 西北工业大学 | Preparation method of pore structure optimized paper-based friction material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123162A (en) * | 2021-04-09 | 2021-07-16 | 西北工业大学 | Preparation method of double-substrate paper-based friction material with excellent performance |
| CN114673029A (en) * | 2022-02-28 | 2022-06-28 | 西北工业大学 | Modified carbon fiber reinforced polyimide resin-based wet friction material and preparation method thereof |
| CN114673029B (en) * | 2022-02-28 | 2022-11-22 | 西北工业大学 | Modified carbon fiber reinforced polyimide resin-based wet friction material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112359637A (en) | Preparation method of polyimide fiber reinforced paper-based friction material | |
| CN103343476B (en) | A kind of whisker modified paper friction material and preparation method thereof | |
| CN102002883B (en) | Wet type paper-based friction material as well as preparation method and application thereof | |
| CN103059504B (en) | A kind of wear resistant automobile braking composite material and preparation method thereof that strengthens | |
| CN107245898B (en) | A kind of carbon fiber reinforced polyether-ether-ketone paper friction material and preparation method thereof | |
| CN102864678B (en) | A kind of carbon fiber powder modified paper base frication material and preparation method thereof | |
| CN111304955B (en) | Method for in-situ reinforcement of paper base material performance by aramid nano-fiber | |
| CN110184850B (en) | Modified SiC nanoparticle reinforced carbon fiber paper-based friction material and preparation method thereof | |
| CN110965385A (en) | Preparation method of pore structure optimized paper-based friction material | |
| CN102864676A (en) | Method for preparing para-aramid paper | |
| CN114164709A (en) | Carbon fiber paper with carbon black reinforced conductive network and preparation method thereof | |
| CN106544924A (en) | A kind of alumina fibre strengthens the preparation method of paper friction material | |
| CN106930138A (en) | A kind of Graphene is modified paper friction material and preparation method | |
| CN108866456A (en) | A kind of stainless steel fibre enhancing Al alloy composite and preparation method thereof | |
| CN116925495B (en) | Resin-based electromagnetic brake friction material and preparation method thereof | |
| CN102942766A (en) | Preparation method of wear-resistant epoxy resin material | |
| CN109503960A (en) | A kind of polyimide fiber enhancing rubber composite material and preparation method thereof | |
| CN114673029B (en) | Modified carbon fiber reinforced polyimide resin-based wet friction material and preparation method thereof | |
| CN105697624A (en) | 2.5-dimensional carbon fiber/aramid fiber woven perform reinforced cashew nut shell oil modified phenolic resin-based friction material | |
| CN111231434B (en) | High-performance composite friction material and preparation method thereof | |
| CN109608092A (en) | Friction material and preparation method thereof for making automobile brake lining plate | |
| CN113201202A (en) | High-damping resin-based friction material and preparation method thereof | |
| CN109826053A (en) | A kind of recyclable preparation method for reusing paper friction material | |
| CN114135609A (en) | Copper-free friction material and preparation method thereof | |
| CN113123162A (en) | Preparation method of double-substrate paper-based friction material with excellent performance |
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 |