CN106868902A - A kind of preparation method of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material - Google Patents
A kind of preparation method of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material Download PDFInfo
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- CN106868902A CN106868902A CN201710042285.9A CN201710042285A CN106868902A CN 106868902 A CN106868902 A CN 106868902A CN 201710042285 A CN201710042285 A CN 201710042285A CN 106868902 A CN106868902 A CN 106868902A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/023—Cleaning wood chips or other raw materials
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C3/00—Pulping cellulose-containing materials
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
- D21C3/16—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides nitrogen oxides; nitric acid nitrates, nitrites
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Abstract
The invention discloses a kind of preparation method of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material, carbon fiber is pre-processed using acid solution oxidizing process, then redox reaction is utilized in carbon fiber surface growth in situ sheet self assembly manganese dioxide using potassium permanganate and the concentrated sulfuric acid, and it has specific surface area big, easily and many advantages, such as resin-bonded, as friction material reinforcement, it is applied to wet type resin-matrix friction material, can effectively increased fiber and resin-bonded specific surface area, and then improve the interfacial combined function of carbon fiber and matrix, make friction material that there is more excellent friction and wear behavior.
Description
Technical field
The invention belongs to Wet-type friction material field, and in particular to a kind of sheet self assembly manganese dioxide modified carbon fiber increases
The preparation method of strong resin-matrix friction material.
Background technology
Resin-matrix friction material is a kind of fully mixed by the warp such as adhesive (resin), reinforcing fiber and frictional property regulator
Close it is uniform after a kind of hot-forming multi-element composite material, with friction and wear behavior is excellent, preparation process is simple, performance can set
Meter property is strong and low cost and other advantages, and its application is more and more wider.
" one kind is using potassium persulfate/silver nitrate system to carbon fiber surface for the Chinese patent of Application No. CN103450501A
Be put into carbon fiber in apparatus,Soxhlet's extraction tube by the modified method in face ", carries out surname extraction removal of impurities by extractant of acetone, i.e.,
Condensing reflux reaction 4h~8h at being 75~85 DEG C in temperature, obtains removing the carbon fiber after surface impurity, after acetone is cleaned
Carbon fiber be positioned over immersion 15 in overcritical acetone-aqueous systems that temperature is 350~380 DEG C and pressure is 7~15MPa~
30min removes the epoxy coating of carbon fiber, and although this method can be very good to remove epoxy coating, but to experiment bar
Part requirement is higher, is unfavorable for engineer applied.
A kind of Chinese patent " carbon fiber surface modification method " of Application No. CN104195824A using acetone 60~
Under conditions of 100 DEG C, sizing agent and impurity to carbon fiber surface are purged, and carbon fiber is placed in into round bottom after cleaning, drying burns
In bottle, in adding concentrated acid, 2~5h is aoxidized at 60~80 DEG C, the carbon fiber after the oxidation for obtaining soaks 5 in distilled water~
10min, then takes out the carbon fiber after being soaked in distilled water, and reject distilled water repeats the above steps 5~10 times and just obtains
The carbon fiber of pretreatment.This method repeat step in experimentation is more, cumbersome time-consuming.
The content of the invention
It is an object of the invention to provide a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base friction material
The preparation method of material, with the defect for overcoming above-mentioned prior art to exist, the present invention changes by using sheet self assembly manganese dioxide
Carbon fiber after property prepares that coefficient of friction is high, the low feature of wear extent resin-matrix friction material as fibre reinforcement.
To reach above-mentioned purpose, the present invention is adopted the following technical scheme that:
A kind of preparation method of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material, including it is following
Step:
Step one:Carbon fiber is soaked with acetone soln, after the sizing agent of carbon fiber to be removed, by carbon fiber cyclic washing
To neutral and dry;
Step 2:The carbon fiber and concentrated nitric acid that step one is dried are mixed to get carbon fiber mixed system, and carbon fiber is mixed
Zoarium system is heated to 80~90 DEG C of 2~4h of reaction, room temperature is cooled to after the completion of reaction carbon fiber deionized water and ethanol is anti-
It is neutral and dry that complex Alternating is washed to solution;
Step 3:Carbon fiber and solid potassium permanganate mixed grinding that step 2 is obtained are taken, mixture is put into distilled water
Middle stirring, stirs after being subsequently adding the concentrated sulfuric acid, the mixed solution heating that then will be obtained, and obtains sheet self assembly manganese dioxide and changes
Property carbon fiber crude product, by modified carbon fiber crude product cyclic washing to neutral and drying to modified carbon fiber;
Step 4:Modified carbon fiber, aramid fiber, paper fiber are dispersed in water using wet method pulping process, Ran Houli
Fibre reinforced materials is obtained with copy paper moulding process;
Step 5:Carry out hot-press solidifying and obtain resin base after fibre reinforced materials is impregnated using phenol-formaldehyde resin modified to rub
Wipe material.
Further, carbon fiber is soaked into 36~48h with acetone soln in step one.
Further, in step 2 by carbon fiber and concentrated nitric acid with 1:50 mass ratio is mixed and obtains carbon fiber mixture
System.
Further, carbon fiber and the mass ratio of potassium permanganate are 1 in step 3:10;By carbon fiber and height in step 3
Potassium manganate grinds 8~15min in being blended in mortar.
Further, ground mixture is put into step 3 and 10h is stirred in distilled water, be then added dropwise over dense sulphur
1h is stirred after acid, wherein, 2.2g mixtures are added in every 200mL distilled water, add 0.5~1.5mL dense in every 200mL distilled water
Sulfuric acid.
Further, mixed solution is heated into 2~6h at a temperature of 80~160 DEG C in step 3, obtains sheet from group
The modified carbon fiber crude product of dress manganese dioxide.
Further, in step 4 by modified carbon fiber, aramid fiber, paper fiber according to (9~13) ﹕ (2~3) ﹕ (2~
3) mass ratio is dispersed in water, and fibre reinforced materials then is obtained using copy paper moulding process.
Further, phenol-formaldehyde resin modified and the mass ratio of modified carbon fiber are (6~8) ﹕ (3~5) in step 5.
Further, in step 5 hot-press solidifying temperature be 150~180 DEG C, the time be 8~15min, pressure be 5~
10MPa。
Further, a kind of carbon fiber of step is polyacrylonitrile-based carbon fibre or asphalt base carbon fiber;Paper in step 4
Fiber is wood-fibred or bamboo fibre;Aramid fiber is be chopped aramid fiber, precipitating aramid fiber or Fanglun slurry cake.
Compared with prior art, the present invention has following beneficial technique effect:
Carbon fiber is pre-processed using acid solution oxidizing process in the present invention, is then utilized using potassium permanganate and the concentrated sulfuric acid
Redox reaction is in carbon fiber surface growth in situ sheet self assembly manganese dioxide, and it has, and specific surface area is big, Yi Yushu
Many advantages, such as fat combination, as friction material reinforcement, wet type resin-matrix friction material is applied to, can effectively increased
The specific surface area of fiber and resin-bonded, and then the interfacial combined function of carbon fiber and matrix is improved, friction material is had more
It is excellent friction and wear behavior.
Further, by control condition, the inventive method prepares the modified carbon fiber of sheet self assembly manganese dioxide
Resin-matrix friction material wear rate be reduced to original carbon fiber preparation resin-matrix friction material 1/9 or so, present invention side
Resin-matrix friction material prepared by method has excellent friction and wear behavior, is detected according to GB/T 13826-2008 technical standards,
Its coefficient of kinetic friction reaches 0.09~0.16, and friction material wear rate is 1.88 × 10-9cm3/ J~1.62 × 10-8cm3/ J, exhibition
Excellent friction and wear behavior and anti-wear performance is revealed.
Brief description of the drawings
Fig. 1 is the SEM figures of carbon fiber surface growth sheet self assembly manganese dioxide, wherein (a) is the SEM of 5k times of amplification
Figure;B () is the SEM figures of 50k times of amplification;
Fig. 2 is the resin-matrix friction material and original carbon fiber system prepared with sheet self assembly manganese dioxide modified carbon fiber
Standby resin-matrix friction material wear rate comparison diagram, wherein CF0:Original carbon fiber reinforced resin base frication material;CF1:Sheet
Self assembly manganese dioxide modified carbon fiber reinforced resin base frication material.
Specific embodiment
The present invention is described in further detail below:
A kind of preparation method of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material, including it is following
Step:
Step one:The carbon fiber (polyacrylonitrile-based carbon fibre or asphalt base carbon fiber) that length is 0.1~10mm is used third
Ketone solution soaks 36~48h, after the sizing agent of carbon fiber to be removed, by carbon fiber cyclic washing to neutrality and at 60~80 DEG C
12~24h of drying;
Step 2:The carbon fiber and concentrated nitric acid that step one is dried are with 1:50 mass ratio is mixed to get carbon fiber mixture
System, by carbon fiber mixed system be heated to 80~90 DEG C reaction 2~4h, be cooled to after the completion of reaction room temperature by carbon fiber spend from
It is neutral and 12~24h of drying at 60~80 DEG C that sub- water and ethanol alternately and repeatedly wash 3~5 times to solution;
Step 3:Carbon fiber that step 2 obtains is taken with solid potassium permanganate by 1:10 quality than mixed grinding 8~
15min, mixture is put into distilled water and stirs 10h, and 1h is stirred after being subsequently adding the concentrated sulfuric acid, wherein, per in 200mL distilled water
2.2g mixtures are added, 0.5~1.5mL concentrated sulfuric acids are added in every 200mL distilled water, the mixed solution that will be obtained is 80~160
2~6h is heated at a temperature of DEG C, the modified carbon fiber crude product of sheet self assembly manganese dioxide is obtained, modified carbon fiber is slightly produced
It is to obtain modified carbon fiber that product cyclic washing dries 12~24h to neutrality and at 60~80 DEG C;
Step 4:Using wet method pulping process, by modified carbon fiber, aramid fiber, (be chopped aramid fiber, precipitating aramid fiber are fine
Dimension or Fanglun slurry cake), paper fiber (wood-fibred or bamboo fibre) is according to ((mass ratio of 2~3) ﹕ (2~3) is scattered in water to 9~13) ﹕
In, fibre reinforced materials then is obtained using copy paper moulding process;
Step 5:By fibre reinforced materials using phenol-formaldehyde resin modified dipping after temperature be 150~180 DEG C, pressure is 5
8~15min of hot-press solidifying is carried out under conditions of~10MPa, wherein, phenol-formaldehyde resin modified is (6 with the mass ratio of modified carbon fiber
~8) ﹕ (3~5), that is, obtain resin-matrix friction material.
The present invention is described in further detail with reference to embodiment:
Embodiment 1
Step one:By length for 0.1~10mm polyacrylonitrile-based carbon fibre acetone soaks 48h at room temperature, to remove carbon
Fiber surface sizing agent and impurity, are 7 and to dry by carbon fiber cyclic washing to pH;
Step 2:The carbon fiber 2g for weighing step one drying is put into round-bottomed flask and adds 100g concentrated nitric acids, in 90 DEG C
Lower reaction 2h, be cooled to after the completion of reaction room temperature by carbon fiber repeatedly deionized water and ethanol replace each washing 3 times to it is neutral simultaneously
Drying;
Step 3:Carbon fiber in step 2 is weighed into 0.2g, potassium permanganate 2g is separately weighed, both is put into mortar and is ground
Mill 10min, ground mixture is put into 10h is stirred in the beaker equipped with 200mL distilled water, then be added dropwise over the dense of 1mL
Sulfuric acid simultaneously stirs 1h, and completely reacted solution is transferred in the volumetric flask of 1000mL, is heated under conditions of 120 DEG C, instead
It is 4h between seasonable, obtains the modified carbon fiber crude product of sheet self assembly manganese dioxide, modified carbon fiber crude product is washed repeatedly
Wash to neutral and drying to modified carbon fiber;
Step 4:Modified carbon fiber, be chopped aramid fiber, wood-fibred are pressed the quality of the ﹕ 1 of 3 ﹕ 1 using wet method pulping process
Than being dispersed in water, the fibre reinforced materials of a diameter of 30mm is then obtained using copy paper moulding process;
Step 5:After fibre reinforced materials is impregnated using phenol-formaldehyde resin modified with vulcanizer at a temperature of 170 DEG C,
Hot-press solidifying 10min is to obtain sheet self assembly manganese dioxide reinforced resin base frication material under the pressure of 5MPa, wherein modified
Phenolic resin is 8 ﹕ 5 with the mass ratio of modified carbon fiber, obtains sheet self assembly manganese dioxide reinforced resin base frication material.
Fig. 1 is sheet self assembly manganese dioxide modified carbon fiber sample surfaces SEM photograph prepared by the present embodiment, from figure
It can be seen that there are a large amount of sheet self assembly manganese dioxide particles in fiber surface, so that the increase of carbon fiber surface area, surface are lived
Property improved, Fig. 2 is that the modified carbon of resin-matrix friction material and sheet self assembly manganese dioxide prepared by original carbon fiber is fine
The resin-matrix friction material wear rate contrast for preparing is tieed up, as can be seen from the figure modified fibre reinforced sample wear rate is
1.88×10-9cm3/ J, is significantly reduced to the 1/9 of original carbon fiber, presents fiber and the good combination of matrix and its wear-resistant
Performance.
Embodiment 2
Step one:By length for 0.1~10mm asphalt base carbon fiber acetone soaks 36h at room temperature, to remove carbon fiber
Surface size agent and impurity, are 7 and to dry by carbon fiber cyclic washing to pH;
Step 2:The carbon fiber 2g for weighing step one drying is put into round-bottomed flask and adds 100g concentrated nitric acids, in 80 DEG C
Lower reaction 4h, be cooled to after the completion of reaction room temperature by carbon fiber repeatedly deionized water and ethanol replace each washing 4 times to it is neutral simultaneously
Drying;
Step 3:Carbon fiber in step 2 is weighed into 0.2g, potassium permanganate 2g is separately weighed, both is put into mortar and is ground
Mill 8min, ground mixture is put into 10h is stirred in the beaker equipped with 200mL distilled water, then be added dropwise over the dense of 0.5mL
Sulfuric acid simultaneously stirs 1h, and completely reacted solution is transferred in the volumetric flask of 1000mL, is heated under conditions of 80 DEG C, reaction
Time is 2h, the modified carbon fiber crude product of sheet self assembly manganese dioxide is obtained, by modified carbon fiber crude product cyclic washing
To neutral and drying to modified carbon fiber;
Step 4:Modified carbon fiber, precipitating aramid fiber, bamboo fibre are pressed the quality of the ﹕ 2 of 13 ﹕ 2 using wet method pulping process
Than being dispersed in water, the fibre reinforced materials of a diameter of 30mm is then obtained using copy paper moulding process;
Step 5:After fibre reinforced materials is impregnated using phenol-formaldehyde resin modified with vulcanizer at a temperature of 180 DEG C,
Hot-press solidifying 15min is to obtain sheet self assembly manganese dioxide reinforced resin base frication material under the pressure of 8MPa, wherein modified
Phenolic resin is 6 ﹕ 3 with the mass ratio of modified carbon fiber, obtains sheet self assembly manganese dioxide reinforced resin base frication material
The coefficient of kinetic friction is 0.12, and wear rate is 1.88 × 10-9cm3/J。
Embodiment 3
Step one:By length for 0.1~10mm asphalt base carbon fiber acetone soaks 48h at room temperature, to remove carbon fiber
Surface size agent and impurity, are 7 and to dry by carbon fiber cyclic washing to pH;
Step 2:The carbon fiber 2g for weighing step one drying is put into round-bottomed flask and adds 100g concentrated nitric acids, in 90 DEG C
Lower reaction 2h, be cooled to after the completion of reaction room temperature by carbon fiber repeatedly deionized water and ethanol replace each washing 3 times to it is neutral simultaneously
Drying;
Step 3:Carbon fiber in step 2 is weighed into 0.2g, potassium permanganate 2g is separately weighed, both is put into mortar and is ground
Mill 10min, ground mixture is put into 10h is stirred in the beaker equipped with 200mL distilled water, then be added dropwise over the dense of 1mL
Sulfuric acid simultaneously stirs 1h, and completely reacted solution is transferred in the volumetric flask of 1000mL, is heated under conditions of 120 DEG C, instead
It is 6h between seasonable, obtains the modified carbon fiber crude product of sheet self assembly manganese dioxide, modified carbon fiber crude product is washed repeatedly
Wash to neutral and drying to modified carbon fiber;
Step 4:Modified carbon fiber, Fanglun slurry cake, wood-fibred are pressed the quality score of the ﹕ 2 of 9 ﹕ 2 using wet method pulping process
Dissipate in water, the fibre reinforced materials of a diameter of 30mm is then obtained using copy paper moulding process;
Step 5:After fibre reinforced materials is impregnated using phenol-formaldehyde resin modified with vulcanizer at a temperature of 150 DEG C,
Hot-press solidifying 10min is to obtain sheet self assembly manganese dioxide reinforced resin base frication material under the pressure of 10MPa, wherein modified
Phenolic resin is 8 ﹕ 5 with the mass ratio of modified carbon fiber, obtains sheet self assembly manganese dioxide reinforced resin base frication material
The coefficient of kinetic friction is 0.13, and wear rate is 5.73 × 10-9cm3/J。
Embodiment 4
Step one:By length for 0.1~10mm polyacrylonitrile-based carbon fibre acetone soaks 42h at room temperature, to remove carbon
Fiber surface sizing agent and impurity, are 7 and to dry by carbon fiber cyclic washing to pH;
Step 2:The carbon fiber 2g for weighing step one drying is put into round-bottomed flask and adds 100g concentrated nitric acids, in 85 DEG C
Lower reaction 3h, be cooled to after the completion of reaction room temperature by carbon fiber repeatedly deionized water and ethanol replace each washing 5 times to it is neutral simultaneously
Drying;
Step 3:Carbon fiber in step 2 is weighed into 0.2g, potassium permanganate 2g is separately weighed, both is put into mortar and is ground
Mill 15min, ground mixture is put into 10h is stirred in the beaker equipped with 200mL distilled water, then be added dropwise over 1.5mL's
The concentrated sulfuric acid simultaneously stirs 1h, and completely reacted solution is transferred in the volumetric flask of 1000mL, is heated under conditions of 160 DEG C,
Reaction time is 4h, obtains the modified carbon fiber crude product of sheet self assembly manganese dioxide, by modified carbon fiber crude product repeatedly
Washing is to neutral and drying to modified carbon fiber;
Step 4:Modified carbon fiber, be chopped aramid fiber, bamboo fibre are pressed the quality of the ﹕ 3 of 13 ﹕ 3 using wet method pulping process
Than being dispersed in water, the fibre reinforced materials of a diameter of 30mm is then obtained using copy paper moulding process;
Step 5:After fibre reinforced materials is impregnated using phenol-formaldehyde resin modified with vulcanizer at a temperature of 160 DEG C,
Hot-press solidifying 8min is to obtain sheet self assembly manganese dioxide reinforced resin base frication material under the pressure of 10MPa, wherein modified
Phenolic resin is 7 ﹕ 4 with the mass ratio of modified carbon fiber, obtains sheet self assembly manganese dioxide reinforced resin base frication material
The coefficient of kinetic friction is 0.11, and wear rate is 4.10 × 10-9cm3/J。
Claims (10)
1. a kind of preparation method of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material, its feature exists
In comprising the following steps:
Step one:Carbon fiber is soaked with acetone soln, after the sizing agent of carbon fiber to be removed, by carbon fiber cyclic washing into
Property is simultaneously dried;
Step 2:The carbon fiber and concentrated nitric acid that step one is dried are mixed to get carbon fiber mixed system, by carbon fiber mixture
System is heated to 80~90 DEG C of 2~4h of reaction, room temperature is cooled to after the completion of reaction and hands over carbon fiber deionized water and ethanol repeatedly
For washing to solution is for neutrality and dries;
Step 3:Carbon fiber and solid potassium permanganate mixed grinding that step 2 is obtained are taken, mixture is put into distilled water and is stirred
Mix, stirred after being subsequently adding the concentrated sulfuric acid, the mixed solution heating that then will be obtained obtains what sheet self assembly manganese dioxide was modified
Carbon fiber crude product, by modified carbon fiber crude product cyclic washing to neutral and drying to modified carbon fiber;
Step 4:Modified carbon fiber, aramid fiber, paper fiber are dispersed in water using wet method pulping process, then using copying
Paper moulding process is obtained fibre reinforced materials;
Step 5:Hot-press solidifying is carried out after fibre reinforced materials is impregnated using phenol-formaldehyde resin modified obtain resin base friction material
Material.
2. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that carbon fiber is soaked into 36~48h with acetone soln in step one.
3. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that by carbon fiber and concentrated nitric acid with 1 in step 2:50 mass ratio mix obtain carbon fiber mix
Zoarium system.
4. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that carbon fiber and the mass ratio of potassium permanganate are 1 in step 3:10;In step 3 by carbon fiber with
Potassium permanganate grinds 8~15min in being blended in mortar.
5. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that ground mixture is put into distilled water in step 3 stirs 10h, be then added dropwise over
1h is stirred after the concentrated sulfuric acid, wherein, per 200mL distilled water in add 2.2g mixtures, per 200mL distilled water in add 0.5~
The 1.5mL concentrated sulfuric acids.
6. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that mixed solution is heated into 2~6h at a temperature of 80~160 DEG C in step 3, obtains sheet certainly
The modified carbon fiber crude product of assembling manganese dioxide.
7. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that by modified carbon fiber, aramid fiber, paper fiber according to (9~13) ﹕ (2~3) ﹕ (2 in step 4
~mass ratio 3) is dispersed in water, and fibre reinforced materials then is obtained using copy paper moulding process.
8. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that phenol-formaldehyde resin modified and the mass ratio of modified carbon fiber are (6~8) ﹕ (3~5) in step 5.
9. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that in step 5 hot-press solidifying temperature be 150~180 DEG C, the time be 8~15min, pressure be 5~
10MPa。
10. a kind of sheet self assembly manganese dioxide modified carbon fiber reinforced resin base frication material according to claim 1
Preparation method, it is characterised in that a kind of carbon fiber of step be polyacrylonitrile-based carbon fibre or asphalt base carbon fiber;In step 4
Paper fiber be wood-fibred or bamboo fibre;Aramid fiber is be chopped aramid fiber, precipitating aramid fiber or Fanglun slurry cake.
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CN117304648A (en) * | 2023-08-25 | 2023-12-29 | 长春盛达化工制品有限公司 | Preparation method of main insulating plate of super-hydrophobic circuit breaker |
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CN108532291A (en) * | 2018-03-30 | 2018-09-14 | 陕西科技大学 | A kind of preparation method of carbon cloth surfaces growth in situ manganese dioxide nano-plates reinforced resin base frication material |
CN109115581A (en) * | 2018-10-30 | 2019-01-01 | 北京航空航天大学 | A kind of preparation method of the sample for high-q cavity method test fiber dielectric properties |
CN109115581B (en) * | 2018-10-30 | 2019-11-05 | 北京航空航天大学 | A kind of preparation method of the sample for high-q cavity method test fiber dielectric properties |
CN117304648A (en) * | 2023-08-25 | 2023-12-29 | 长春盛达化工制品有限公司 | Preparation method of main insulating plate of super-hydrophobic circuit breaker |
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