CN108752861A - A kind of phenolic resin composite friction material - Google Patents
A kind of phenolic resin composite friction material Download PDFInfo
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- CN108752861A CN108752861A CN201810650415.1A CN201810650415A CN108752861A CN 108752861 A CN108752861 A CN 108752861A CN 201810650415 A CN201810650415 A CN 201810650415A CN 108752861 A CN108752861 A CN 108752861A
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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
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K3/14—Anti-slip materials; Abrasives
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- 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
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a kind of phenolic resin composite friction materials, belong to technical field of polymer materials.It weighs successively：18~25 parts of phenol-formaldehyde resin modifieds, 8~10 parts of aramid fibers, 12~16 parts of aluminium oxide, 10~15 parts of barium sulfate, 8~10 parts of calcium carbonate crystal whiskers and 12~16 parts of additives, phenol-formaldehyde resin modified is pulverized and sieved, obtain phenol-formaldehyde resin modified powder, phenol-formaldehyde resin modified powder is mixed with aramid fiber, and aluminium oxide is added, barium sulfate, calcium carbonate crystal whisker and additive, after mixed milling, obtain phenolic resin composite friction material blank, phenolic resin composite friction material blank is put into mold, it is hot-forming in heat pressing forming machines, phenolic resin composite friction material blank must be pre-processed, it will pre-process under conditions of phenolic resin composite friction material blank is 180 DEG C in temperature after 8~9h of heat treatment, obtain phenolic resin composite friction material.Phenolic resin composite friction material prepared by the present invention has excellent heat resistance, frictional behaviour and wear-resisting property.
Description
Technical field
The invention discloses a kind of phenolic resin composite friction materials, belong to technical field of polymer materials.
Background technology
Friction material is a kind of multi-element composite material, is by high polymer binder, reinforcement and frictional property regulator three
Major class key component and other compounding agents are through made of a series of production and processing technologies.It is mainly characterized by have high and stablize
Friction coefficient and good abrasion resistance properties, while there is certain heat resistance and mechanical strength, vehicle or machinery can be met
The performance requirement of transmission and braking.Therefore, it is widely used in the fields such as military project, engineering machinery, automobile and household appliance,
It is for power transmission or the indispensable material of braking deceleration.
Currently, the raising for Properties of Friction Materials is concentrated mainly in the modification of basis material, researcher is in recent years
It is dedicated to combining high rigidity, heat safe wear-resistant material with the matrix with excellent toughness and improves the wear-resisting of friction material
Performance.Phenolic resin is the first choice of basis material in present friction material, and mainly because its raw material is easy to get, cost is relatively low, and solid
There is relatively good heat resistance, mechanical strength is higher, and performance is stablized, and is widely used the features such as hard wear resistant after change.But with
The rapid development of modern industry and automotive engineering, common phenolic resin is resistance to because its phenolic hydroxyl group and methylene are oxidized easily
Hot deficiency cannot meet the high brake request for listing vehicle of high speed.Improvement for phenolic resin heat resistance has had
A large amount of research, Guo Jiangshan etc. are prepared for phenolic resin/organo montmorillonite using organo montmorillonite as raw material, using intercalation polymeric method
Nanocomposite, decomposition temperature improve 17 DEG C than pure phenolic resin.Xu soldier etc. is prepared using moulding curing molding method
Phenolic resin/hexamethylenetetramine/Nano composite material of montmorillonite, the curing activation energy of the composite material of gained than pure resin
It is low.Above-mentioned study on the modification is mainly mechanical property and ablation property of raising composite material etc., and to the friction and abrasion of material
Can research then rare report.That there is also heat resistances is bad for traditional friction material at present, and frictional behaviour is unstable and can not
The problem of further increasing, therefore also need to study it.
Invention content
The present invention solves the technical problem of：Bad for conventional friction material heat resistance, frictional behaviour is unstable
The problem of determining and can not further increasing, provides a kind of phenolic resin composite friction material.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of phenolic resin composite friction material, is made of the raw material of following parts by weight：
18~25 parts of phenol-formaldehyde resin modified
8~10 parts of aramid fiber
12~16 parts of aluminium oxide
10~15 parts of barium sulfate
8~10 parts of calcium carbonate crystal whisker
12~16 parts of additive
The preparation method of the additive is：
By polystyrene microsphere and water in mass ratio 1：10~1：20 mixing, and the mixed of 1~2 times of polystyrene microsphere quality is added
Acid solution is closed, after being stirred to react, filtering, washing to cleaning solution is neutrality, dry, obtains pretreatment polystyrene microsphere, will pre-process
Polystyrene microsphere and potassium hydroxide solution in mass ratio 1：5~1：8 mixing, and pretreatment polystyrene microsphere quality is added
0.2~0.3 times of sodium thiosulfate, after being stirred to react, filtering, washing to cleaning solution is neutrality, dry, obtains pre- modified polyphenyl second
Alkene microballoon, by graphene oxide solution and Modified polystyrene spheres in mass ratio 5：1~6：1 mixing, and graphite oxide is added
The octadecylamine that 0.1~0.2 times of alkene solution quality after being stirred, filters, dry, obtains Modified polystyrene spheres, will change
Property polystyrene microsphere and water in mass ratio 1：5~1：After adjusting pH to 9.5~10.5, it is micro- that modified polystyrene is added in 8 mixing
The graphene oxide solution of 0.10~0.12 times of the fibroin liquid and Modified polystyrene spheres quality of 1~2 times of ball quality, is stirred
After mixing mixing, filter, it is dry, obtain additive.
The phenol-formaldehyde resin modified is by phenol and formaldehyde in mass ratio 1.0：1.3~1.0：1.5 mixing, and phenol is added
The sodium hydroxide of 0.1~0.2 times of the organobentonite and phenol quality that 0.2~0.3 times of quality after being stirred, obtains modified phenol
Urea formaldehyde blank, adjusts decompression dehydration after the pH to 7.0~7.2 of phenol-formaldehyde resin modified blank, and discharging obtains phenol-formaldehyde resin modified.
The length of the aramid fiber be 1~3mm, a diameter of 1~50 μm.
The alumina particle is 100 mesh.
The barium sulfate grain size is 200 mesh.
The mix acid liquor by sulfuric acid that mass fraction is 40~60% be 30~50% with mass fraction nitric acid by quality
Than 3：1 mixing, obtains mix acid liquor.
The graphene oxide solution is by graphene oxide and water in mass ratio 1：40~1：50 mixing, ultrasonic disperse,
Obtain graphene oxide solution.
The fibroin liquid is by silk fiber and sodium carbonate liquor in mass ratio 1：400~1：500 mixing, heating are stirred
It mixes, filters, washing obtains pretreatment silk fiber, by pretreatment silk fiber and lithium-bromide solution in mass ratio 1：10~1：12
Mixing is stood, dialysis, and after centrifugation, is taken upper liquid, obtained fibroin liquid.
The beneficial effects of the invention are as follows：
Additive is added when preparing phenolic resin composite friction material by the present invention, first, micro- containing polystyrene in additive
Ball, since strand is rigidity in polystyrene so that polystyrene has preferable hardness, can make production after being added in product
The friction coefficient of product improves, and then the wearability of product is made to improve, and secondly, cladding is aerobic on the outside of polystyrene microsphere in additive
Graphite alkene, graphene oxide itself has good lubricity, after treatment, between graphene oxide layer and lamella
It is connected by fibroin, to make graphene oxide that there is preferable frictional behaviour, and then the friction coefficient of product is made to improve, then
Person, since there is graphene oxide thermal conductivity the heat resistance of product can be made to improve, also, in additive after being added in product
In preparation process, Electrostatic Absorption is first passed through on the outside of polystyrene microsphere and covers one layer of graphene oxide, and is led in subsequent processing
Fibroin adsorption and oxidation graphene again is crossed, the graphene oxide to be adsorbed by fibroin in the outside of product is disappeared
After consumption, exposed single-layer oxidized graphite alkene can still make additive have good friction coefficient and thermal conductivity, to make production
The heat resistance and friction coefficient of product improve, while the unadsorbed graphene oxide in polystyrene microsphere in part can be in mixed process
In it is compound with organobentonite, make organobentonite complicatedization, the friction coefficient and heat resistance to make product are further
It improves.
Specific implementation mode
The sodium carbonate liquor in mass ratio 1 for being 5~8% by silk fiber and mass fraction：400~1：500 mixing, Yu Wen
90~95 DEG C of degree, under conditions of rotating speed is 200~300r/min after 30~40min of heating stirring, filtering obtains pretreatment silk fibroin
Blank is tieed up, after pretreatment silk fiber blank is washed with deionized 8~15 times, pretreatment silk fiber is obtained, will pre-process
Silk fiber and the lithium-bromide solution in mass ratio 1 that molar fraction is 9.0~9.5mol/L：10~1：12 mixing, in room temperature item
After standing 4~5h under part, the mixture for pre-processing silk fiber and lithium-bromide solution is moved into the fibre that molecular cut off is 3500
In the plain bag filter of dimension after 1~2h of dialysis, obtain fibroin liquid blank, by fibroin liquid blank in temperature be 1000~3000r/
After centrifuging 10~20min under conditions of min, upper liquid is taken, fibroin liquid is obtained；In mass ratio by graphene oxide and water
1：40~1：50 mixing obtain graphene oxide solution under conditions of frequency is 55~65kHz after 15~20min of ultrasonic disperse；
By phenol and formaldehyde in mass ratio 1.0：1.3~1.0：1.5 are mixed in flask, and into flask be added phenol quality 0.2~
The sodium hydroxide of 0.3 times of 0.1~0.2 times of organobentonite and phenol quality, in temperature be 90~100 DEG C, rotating speed be 300~
After being stirred 2~3h under conditions of 400r/min, phenol-formaldehyde resin modified blank is obtained, the acetic acid for being 12~20% with mass fraction
Decompression dehydration after the pH to 7.0~7.2 of adjusting phenol-formaldehyde resin modified blank, discharging obtain phenol-formaldehyde resin modified, and polystyrene is micro-
Ball and water in mass ratio 1：10~1：20 mixing, and polystyrene microsphere matter is added into the mixture of polystyrene microsphere and water
1~2 times of mix acid liquor of amount, in temperature be 50~60 DEG C, rotating speed be stirred to react under conditions of being 300~350r/min after 2~
After 3h, filtering obtains filter cake, and it is drying under conditions of being 30~40 DEG C in temperature after neutrality that filter cake, which is washed with water to cleaning solution,
55~85min obtains pretreatment polystyrene microsphere, will pre-process the hydroxide that polystyrene microsphere and mass fraction are 8~12%
Potassium solution in mass ratio 1：5~1：8 mixing, and pre-process in the mixture of polystyrene microsphere and potassium hydroxide solution and be added in advance
The sodium thiosulfate for handling 0.2~0.3 times of polystyrene microsphere quality is 70~80 DEG C in temperature, and rotating speed is 300~320r/
After being stirred to react 2~3h under conditions of min, filtering obtains filter residue, and it is neutrality that filter residue, which is washed with water to cleaning solution, is in temperature
Under conditions of 30~40 DEG C after dry 1~2h, pre- Modified polystyrene spheres are obtained, by graphene oxide solution and modified polyphenyl second
Alkene microballoon in mass ratio 5：1~6：1 mixing, and be added into the mixture of graphene oxide solution and Modified polystyrene spheres
The octadecylamine that 0.1~0.2 times of graphene oxide solution quality is 80~85 DEG C in temperature, and rotating speed is 300~400r/min
Under conditions of, after being stirred 5~8h, filter, obtain Modified polystyrene spheres blank, by Modified polystyrene spheres blank in
Temperature after dry 1~2h, obtains Modified polystyrene spheres, Modified polystyrene spheres and water is pressed under conditions of being 45~55 DEG C
Mass ratio 1：5~1：8 mixing, the ammonium hydroxide for being 20~22% with mass fraction adjust the mixture of Modified polystyrene spheres and water
After pH to 9.5~10.5, to addition Modified polystyrene spheres quality 1~2 in the mixture of Modified polystyrene spheres and water
Times 0.10~0.12 times of fibroin liquid and Modified polystyrene spheres quality graphene oxide solution, in temperature be 30~
45 DEG C, after rotating speed is stirred 1~2h under conditions of being 250~380r/min, filtering obtains additive blank, by additive base
Expect be 30~50 DEG C in temperature under conditions of dry 50~80min, obtain additive, count in parts by weight, weigh successively：18~25
Part phenol-formaldehyde resin modified, 8~10 parts of aramid fibers, 12~16 parts of aluminium oxide, 10~15 parts of barium sulfate, 8~10 parts of calcium carbonate crystalline substances
Phenol-formaldehyde resin modified must be crushed with 12~16 parts of additives, crosses 120 mesh sieve, phenol-formaldehyde resin modified powder is obtained, by modified phenolic
Toner is mixed in aramid fiber in high speed mixing smelting machine, and aluminium oxide is added into high speed mixing smelting machine, barium sulfate, calcium carbonate
Whisker and additive after 2~5min of mixed milling, obtain phenolic resin composite friction material blank, by phenolic resin compound friction
Material blank is put into mold, in heat pressing forming machines temperature be 150~160 DEG C, pressure be 15~16MPa under conditions of hot pressing
Molding, must pre-process phenolic resin composite friction material blank, by pretreatment phenolic resin composite friction material blank in temperature
After being heat-treated 8~9h under conditions of being 180 DEG C, phenolic resin composite friction material is obtained.The length of the aramid fiber be 1~
3mm, a diameter of 1~50 μm.The alumina particle is 100 mesh.The barium sulfate grain size is 200 mesh.The mix acid liquor will
The nitric acid in mass ratio 3 that the sulfuric acid that mass fraction is 40~60% is 30~50% with mass fraction：1 mixing, obtains mix acid liquor.
Example 1
The sodium carbonate liquor in mass ratio 1 for being 8% by silk fiber and mass fraction：500 mixing, in 95 DEG C of temperature, rotating speed is
Under conditions of 300r/min after heating stirring 40min, filtering must pre-process silk fiber blank, will pre-process silk fiber base
After material is washed with deionized 15 times, pretreatment silk fiber is obtained, is 9.5mol/L by pretreatment silk fiber and molar fraction
Lithium-bromide solution in mass ratio 1：12 mixing, it is after standing 5h under room temperature, pretreatment silk fiber and lithium bromide is molten
After the mixture of liquid moves into the cellulose dialysis bag that molecular cut off is 3500 2h that dialyses, fibroin liquid blank is obtained, by silkworm
After silk-fibroin liquid blank centrifuges 20min under conditions of temperature is 3000r/min, upper liquid is taken, fibroin liquid is obtained；It will
Graphene oxide and water in mass ratio 1：50 mixing obtain oxidation stone under conditions of frequency is 65kHz after ultrasonic disperse 20min
Black alkene solution；By phenol and formaldehyde in mass ratio 1.0：1.5 are mixed in flask, and 0.3 times of phenol quality is added into flask
0.2 times of organobentonite and phenol quality sodium hydroxide, in temperature be 100 DEG C, rotating speed be 400r/min under conditions of stir
Mix mixing 3h after, obtain phenol-formaldehyde resin modified blank, with mass fraction be 20% acetic acid adjust phenol-formaldehyde resin modified blank pH to
Decompression dehydration after 7.2, discharging, obtains phenol-formaldehyde resin modified, by polystyrene microsphere and water in mass ratio 1：20 mixing, and to polyphenyl
The mix acid liquor of 2 times of polystyrene microsphere quality is added in the mixture of ethylene microballoon and water, is 60 DEG C in temperature, rotating speed is
After being stirred to react rear 3h under conditions of 350r/min, filtering obtains filter cake, after filter cake is washed with water to cleaning solution as neutrality, in
Temperature dry 85min under conditions of being 40 DEG C, obtains pretreatment polystyrene microsphere, by pretreatment polystyrene microsphere and quality point
The potassium hydroxide solution in mass ratio 1 that number is 12%：8 mixing, and pre-process the mixing of polystyrene microsphere and potassium hydroxide solution
The sodium thiosulfate of 0.3 times of pretreatment polystyrene microsphere quality is added in object, is 80 DEG C in temperature, rotating speed is 320r/min's
Under the conditions of be stirred to react 3h after, filtering obtains filter residue, and it is neutrality that filter residue, which is washed with water to cleaning solution, in temperature be 40 DEG C of item
Under part after dry 2h, pre- Modified polystyrene spheres are obtained, in mass ratio with Modified polystyrene spheres by graphene oxide solution
6：1 mixing, and graphene oxide solution quality is added into the mixture of graphene oxide solution and Modified polystyrene spheres
0.2 times of octadecylamine is 85 DEG C in temperature, under conditions of rotating speed is 400r/min, after being stirred 8h, filters, must change
Property polystyrene microsphere blank, under conditions of being 55 DEG C in temperature by Modified polystyrene spheres blank after dry 2h, obtain modification
Polystyrene microsphere, by Modified polystyrene spheres and water in mass ratio 1：8 mixing, the ammonium hydroxide for being 22% with mass fraction are adjusted
After the mixture pH to 10.5 of Modified polystyrene spheres and water, it is added and changes into the mixture of Modified polystyrene spheres and water
The fibroin liquid of 2 times of property polystyrene microsphere quality and the graphene oxide of 0.12 times of Modified polystyrene spheres quality are molten
Liquid is 45 DEG C in temperature, and after rotating speed is stirred 2h under conditions of being 380r/min, filtering obtains additive blank, by additive
Dry 80min under conditions of blank is 50 DEG C in temperature, obtains additive, counts in parts by weight, weigh successively：25 parts of modified phenolics
Resin, 10 parts of aramid fibers, 16 parts of aluminium oxide, 15 parts of barium sulfate, 10 parts of calcium carbonate crystal whiskers and 16 parts of additives, by modified phenolic
Resin crushes, and crosses 120 mesh sieve, obtains phenol-formaldehyde resin modified powder, and phenol-formaldehyde resin modified powder and aramid fiber are mixed in high speed
In kneading machine, and aluminium oxide is added into high speed mixing smelting machine, barium sulfate, calcium carbonate crystal whisker and additive, after mixed milling 5min,
Phenolic resin composite friction material blank is obtained, phenolic resin composite friction material blank is put into mold, in heat pressing forming machines
It it is 160 DEG C in temperature, pressure is hot-forming under conditions of being 16MPa, must pre-process phenolic resin composite friction material blank, will
It pre-processes after being heat-treated 9h under conditions of phenolic resin composite friction material blank is 180 DEG C in temperature, it is compound to obtain phenolic resin
Friction material.The length of the aramid fiber be 3mm, a diameter of 50 μm.The alumina particle is 100 mesh.The barium sulfate
Grain size is 200 mesh.The nitric acid in mass ratio 3 that the sulfuric acid that mass fraction is 60% is 50% with mass fraction by the mix acid liquor：1
Mixing, obtains mix acid liquor.
Example 2
The sodium carbonate liquor in mass ratio 1 for being 8% by silk fiber and mass fraction：500 mixing, in 95 DEG C of temperature, rotating speed is
Under conditions of 300r/min after heating stirring 40min, filtering must pre-process silk fiber blank, will pre-process silk fiber base
After material is washed with deionized 15 times, pretreatment silk fiber is obtained, is 9.5mol/L by pretreatment silk fiber and molar fraction
Lithium-bromide solution in mass ratio 1：12 mixing, it is after standing 5h under room temperature, pretreatment silk fiber and lithium bromide is molten
After the mixture of liquid moves into the cellulose dialysis bag that molecular cut off is 3500 2h that dialyses, fibroin liquid blank is obtained, by silkworm
After silk-fibroin liquid blank centrifuges 20min under conditions of temperature is 3000r/min, upper liquid is taken, fibroin liquid is obtained；It will
Graphene oxide and water in mass ratio 1：50 mixing obtain oxidation stone under conditions of frequency is 65kHz after ultrasonic disperse 20min
Black alkene solution；By polystyrene microsphere and water in mass ratio 1：20 mixing, and add into the mixture of polystyrene microsphere and water
The mix acid liquor for entering 2 times of polystyrene microsphere quality, in temperature be 60 DEG C, rotating speed be 350r/min under conditions of be stirred to react after
After 3h, filtering obtains filter cake, and it is drying under conditions of being 40 DEG C in temperature after neutrality that filter cake, which is washed with water to cleaning solution,
85min obtains pretreatment polystyrene microsphere, will pre-process the potassium hydroxide solution that polystyrene microsphere and mass fraction are 12%
In mass ratio 1：8 mixing, and pre-process and pretreatment polyphenyl second is added in the mixture of polystyrene microsphere and potassium hydroxide solution
The sodium thiosulfate that 0.3 times of alkene microspheres quality, in temperature be 80 DEG C, rotating speed be 320r/min under conditions of be stirred to react 3h after,
Filtering, obtains filter residue, and it is neutrality that filter residue, which is washed with water to cleaning solution, under conditions of being 40 DEG C in temperature after dry 2h, obtains pre- change
Property polystyrene microsphere, by graphene oxide solution and Modified polystyrene spheres in mass ratio 6：1 mixing, and to graphite oxide
The octadecylamine of 0.2 times of graphene oxide solution quality is added in the mixture of alkene solution and Modified polystyrene spheres, in
Temperature is 85 DEG C, under conditions of rotating speed is 400r/min, after being stirred 8h, filters, obtains Modified polystyrene spheres blank, will
Under conditions of Modified polystyrene spheres blank is 55 DEG C in temperature after dry 2h, Modified polystyrene spheres are obtained, it will be modified poly-
Phenylethylene micro ball and water in mass ratio 1：8 mixing, the ammonium hydroxide for being 22% with mass fraction adjust Modified polystyrene spheres and water
After mixture pH to 10.5, to 2 times of addition Modified polystyrene spheres quality in the mixture of Modified polystyrene spheres and water
0.12 times of fibroin liquid and Modified polystyrene spheres quality graphene oxide solution, be 45 DEG C in temperature, rotating speed is
After being stirred 2h under conditions of 380r/min, filtering obtains additive blank, the condition for being 50 DEG C in temperature by additive blank
Lower dry 80min, obtains additive, counts in parts by weight, weigh successively：25 parts of phenolic resin, 10 parts of aramid fibers, 16 parts of oxidations
Aluminium, 15 parts of barium sulfate, 10 parts of calcium carbonate crystal whiskers and 16 parts of additives, phenolic resin is crushed, and is crossed 120 mesh sieve, is obtained phenolic resin
Phenolic resin powder and aramid fiber are mixed in high speed mixing smelting machine, and aluminium oxide are added into high speed mixing smelting machine by powder, sulphur
Sour barium, calcium carbonate crystal whisker and additive after mixed milling 5min, obtain phenolic resin composite friction material blank, by phenolic resin
Composite friction material blank is put into mold, in heat pressing forming machines temperature be 160 DEG C, pressure be 16MPa under conditions of hot pressing
Molding, must pre-process phenolic resin composite friction material blank, by pretreatment phenolic resin composite friction material blank in temperature
After being heat-treated 9h under conditions of being 180 DEG C, phenolic resin composite friction material is obtained.The length of the aramid fiber is 3mm, diameter
It is 50 μm.The alumina particle is 100 mesh.The barium sulfate grain size is 200 mesh.Mass fraction is by the mix acid liquor
The nitric acid in mass ratio 3 that 60% sulfuric acid is 50% with mass fraction：1 mixing, obtains mix acid liquor.
Example 3
The sodium carbonate liquor in mass ratio 1 for being 8% by silk fiber and mass fraction：500 mixing, in 95 DEG C of temperature, rotating speed is
Under conditions of 300r/min after heating stirring 40min, filtering must pre-process silk fiber blank, will pre-process silk fiber base
After material is washed with deionized 15 times, pretreatment silk fiber is obtained, is 9.5mol/L by pretreatment silk fiber and molar fraction
Lithium-bromide solution in mass ratio 1：12 mixing, it is after standing 5h under room temperature, pretreatment silk fiber and lithium bromide is molten
After the mixture of liquid moves into the cellulose dialysis bag that molecular cut off is 3500 2h that dialyses, fibroin liquid blank is obtained, by silkworm
After silk-fibroin liquid blank centrifuges 20min under conditions of temperature is 3000r/min, upper liquid is taken, fibroin liquid is obtained；It will
Graphene oxide and water in mass ratio 1：50 mixing obtain oxidation stone under conditions of frequency is 65kHz after ultrasonic disperse 20min
Black alkene solution；It counts, weighs successively in parts by weight：25 parts of phenol-formaldehyde resin modifieds, 10 parts of aramid fibers, 16 parts of aluminium oxide, 15 parts
Barium sulfate, 10 parts of calcium carbonate crystal whiskers, phenol-formaldehyde resin modified is crushed, and is crossed 120 mesh sieve, is obtained phenol-formaldehyde resin modified powder, will be modified
Phenolic resin powder is mixed in aramid fiber in high speed mixing smelting machine, and aluminium oxide is added into high speed mixing smelting machine, barium sulfate, carbon
Sour calcium pyroborate after mixed milling 5min, obtains phenolic resin composite friction material blank, by phenolic resin composite friction material blank
Be put into mold, in heat pressing forming machines temperature be 160 DEG C, pressure be 16MPa under conditions of it is hot-forming, obtain pretreatment phenolic aldehyde
Resin compounded friction material blank, heat under conditions of being 180 DEG C in temperature by pretreatment phenolic resin composite friction material blank
After handling 9h, phenolic resin composite friction material is obtained.The length of the aramid fiber be 3mm, a diameter of 50 μm.The aluminium oxide
Grain size is 100 mesh.The barium sulfate grain size is 200 mesh.The sulfuric acid and mass fraction that mass fraction is 60% by the mix acid liquor
For 50% nitric acid in mass ratio 3：1 mixing, obtains mix acid liquor.
Example 4
The sodium carbonate liquor in mass ratio 1 for being 8% by silk fiber and mass fraction：500 mixing, in 95 DEG C of temperature, rotating speed is
Under conditions of 300r/min after heating stirring 40min, filtering must pre-process silk fiber blank, will pre-process silk fiber base
After material is washed with deionized 15 times, pretreatment silk fiber is obtained, is 9.5mol/L by pretreatment silk fiber and molar fraction
Lithium-bromide solution in mass ratio 1：12 mixing, it is after standing 5h under room temperature, pretreatment silk fiber and lithium bromide is molten
After the mixture of liquid moves into the cellulose dialysis bag that molecular cut off is 3500 2h that dialyses, fibroin liquid blank is obtained, by silkworm
After silk-fibroin liquid blank centrifuges 20min under conditions of temperature is 3000r/min, upper liquid is taken, fibroin liquid is obtained；It will
Graphene oxide and water in mass ratio 1：50 mixing obtain oxidation stone under conditions of frequency is 65kHz after ultrasonic disperse 20min
Black alkene solution；By phenol and formaldehyde in mass ratio 1.0：1.5 are mixed in flask, and 0.3 times of phenol quality is added into flask
0.2 times of organobentonite and phenol quality sodium hydroxide, in temperature be 100 DEG C, rotating speed be 400r/min under conditions of stir
Mix mixing 3h after, obtain phenol-formaldehyde resin modified blank, with mass fraction be 20% acetic acid adjust phenol-formaldehyde resin modified blank pH to
Decompression dehydration after 7.2, discharging, obtains phenol-formaldehyde resin modified, by polystyrene microsphere and water in mass ratio 1：20 mixing, and to polyphenyl
The mix acid liquor of 2 times of polystyrene microsphere quality is added in the mixture of ethylene microballoon and water, is 60 DEG C in temperature, rotating speed is
After being stirred to react rear 3h under conditions of 350r/min, filtering obtains filter cake, after filter cake is washed with water to cleaning solution as neutrality, in
Temperature dry 85min under conditions of being 40 DEG C, obtains pretreatment polystyrene microsphere, by pretreatment polystyrene microsphere and quality point
The potassium hydroxide solution in mass ratio 1 that number is 12%：8 mixing, and pre-process the mixing of polystyrene microsphere and potassium hydroxide solution
The sodium thiosulfate of 0.3 times of pretreatment polystyrene microsphere quality is added in object, is 80 DEG C in temperature, rotating speed is 320r/min's
Under the conditions of be stirred to react 3h after, filtering obtains filter residue, and it is neutrality that filter residue, which is washed with water to cleaning solution, in temperature be 40 DEG C of item
Under part after dry 2h, pre- Modified polystyrene spheres are obtained, in mass ratio with Modified polystyrene spheres by graphene oxide solution
6：1 mixing, and graphene oxide solution quality is added into the mixture of graphene oxide solution and Modified polystyrene spheres
0.2 times of octadecylamine is 85 DEG C in temperature, under conditions of rotating speed is 400r/min, after being stirred 8h, filters, must change
Property polystyrene microsphere blank, under conditions of being 55 DEG C in temperature by Modified polystyrene spheres blank after dry 2h, obtain modification
Polystyrene microsphere obtains additive, counts in parts by weight, weighs successively：25 parts of phenol-formaldehyde resin modifieds, 10 parts of aramid fibers, 16
Part aluminium oxide, 15 parts of barium sulfate, 10 parts of calcium carbonate crystal whiskers and 16 parts of additives, phenol-formaldehyde resin modified is crushed, and crosses 120 mesh sieve,
Phenol-formaldehyde resin modified powder is obtained, phenol-formaldehyde resin modified powder and aramid fiber are mixed in high speed mixing smelting machine, and is mixed to high speed
It is added aluminium oxide, barium sulfate, calcium carbonate crystal whisker and additive in mill, after mixed milling 5min, obtains phenolic resin compound friction
Phenolic resin composite friction material blank is put into mold by material blank, in heat pressing forming machines temperature be 160 DEG C, pressure
It is hot-forming under conditions of 16MPa, phenolic resin composite friction material blank must be pre-processed, it is compound by phenolic resin is pre-processed
Under conditions of friction material blank is 180 DEG C in temperature after heat treatment 9h, phenolic resin composite friction material is obtained.The aramid fiber is fine
The length of dimension be 3mm, a diameter of 50 μm.The alumina particle is 100 mesh.The barium sulfate grain size is 200 mesh.The mixing
The nitric acid in mass ratio 3 that the sulfuric acid that mass fraction is 60% is 50% with mass fraction by acid solution：1 mixing, obtains mix acid liquor.
Comparative example：The phenolic resin composite friction material of Wuxi Chemical Co., Ltd. production.
1 to 4 gained phenolic resin composite friction material of example and comparative example product are subjected to performance detection, specific detection side
Method is as follows：
Pressure speed change frictional testing machine is adjusted using X-DM types, experiment condition is：（1）Friction disk rotating speed be set as 480 turns/
Minute, pressing force 10kg/cm2（0.98MPa）；（2）Two samples are once taken to be tested in every group of sample；（3）Sample friction
Area is 25mm × 25mm, and tolerance is -0.2mm~0mm；（4）The thickness of sample be 5 to 7mm, tolerance be ±
0.2mm.Sample standard is tested according to GB5763.Specific testing result is as shown in table 1：
Table 1：Performance detection table
By 1 testing result of table it is found that present invention gained phenolic resin composite friction material has excellent heat resistance, frictional property
Energy and wear-resisting property.
Claims (8)
1. a kind of phenolic resin composite friction material, which is characterized in that be made of the raw material of following parts by weight：
18~25 parts of phenol-formaldehyde resin modified
8~10 parts of aramid fiber
12~16 parts of aluminium oxide
10~15 parts of barium sulfate
8~10 parts of calcium carbonate crystal whisker
12~16 parts of additive
The preparation method of the additive is：
By polystyrene microsphere and water in mass ratio 1：10~1：20 mixing, and the mixed of 1~2 times of polystyrene microsphere quality is added
Acid solution is closed, after being stirred to react, filtering, washing to cleaning solution is neutrality, dry, obtains pretreatment polystyrene microsphere, will pre-process
Polystyrene microsphere and potassium hydroxide solution in mass ratio 1：5~1：8 mixing, and pretreatment polystyrene microsphere quality is added
0.2~0.3 times of sodium thiosulfate, after being stirred to react, filtering, washing to cleaning solution is neutrality, dry, obtains pre- modified polyphenyl second
Alkene microballoon, by graphene oxide solution and Modified polystyrene spheres in mass ratio 5：1~6：1 mixing, and graphite oxide is added
The octadecylamine that 0.1~0.2 times of alkene solution quality after being stirred, filters, dry, obtains Modified polystyrene spheres, will change
Property polystyrene microsphere and water in mass ratio 1：5~1：After adjusting pH to 9.5~10.5, it is micro- that modified polystyrene is added in 8 mixing
The graphene oxide solution of 0.10~0.12 times of the fibroin liquid and Modified polystyrene spheres quality of 1~2 times of ball quality, is stirred
After mixing mixing, filter, it is dry, obtain additive.
2. a kind of phenolic resin composite friction material according to claim 1, it is characterised in that：The phenol-formaldehyde resin modified
For by phenol and formaldehyde in mass ratio 1.0：1.3~1.0：1.5 mixing, and organic swelling of 0.2~0.3 times of phenol quality is added
The sodium hydroxide of 0.1~0.2 times of soil and phenol quality after being stirred, obtains phenol-formaldehyde resin modified blank, adjusts modified phenolic resin
Decompression dehydration after the pH to 7.0~7.2 of fat blank, discharging, obtains phenol-formaldehyde resin modified.
3. a kind of phenolic resin composite friction material according to claim 1, it is characterised in that：The length of the aramid fiber
It is 1~3mm to spend, a diameter of 1~50 μm.
4. a kind of phenolic resin composite friction material according to claim 1, it is characterised in that：The alumina particle is
100 mesh.
5. a kind of phenolic resin composite friction material according to claim 1, it is characterised in that：The barium sulfate grain size is
200 mesh.
6. a kind of phenolic resin composite friction material according to claim 1, it is characterised in that：The mix acid liquor is by matter
Measure the sulfuric acid that score is 40~60% and the nitric acid in mass ratio 3 that mass fraction is 30~50%：1 mixing, obtains mix acid liquor.
7. a kind of phenolic resin composite friction material according to claim 1, it is characterised in that：The graphene oxide is molten
Liquid is by graphene oxide and water in mass ratio 1：40~1：50 mixing, ultrasonic disperse obtain graphene oxide solution.
8. a kind of phenolic resin composite friction material according to claim 1, it is characterised in that：The fibroin liquid is
By silk fiber and sodium carbonate liquor in mass ratio 1：400~1：500 mixing, heating stirring filter, and washing must pre-process silkworm
Silk fiber, by pretreatment silk fiber and lithium-bromide solution in mass ratio 1：10~1：12 mixing, stand, dialysis, and centrifuge and divide
From rear, upper liquid is taken, fibroin liquid is obtained.
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| CN201810650415.1A CN108752861A (en) | 2018-06-22 | 2018-06-22 | A kind of phenolic resin composite friction material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273953A (en) * | 2019-07-03 | 2019-09-24 | 晋江凯燕新材料科技有限公司 | Without copper without asbestos organic friction material and product |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273953A (en) * | 2019-07-03 | 2019-09-24 | 晋江凯燕新材料科技有限公司 | Without copper without asbestos organic friction material and product |
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