CN109704638A - A kind of brake spacer for automobile - Google Patents
A kind of brake spacer for automobile Download PDFInfo
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- CN109704638A CN109704638A CN201811587518.4A CN201811587518A CN109704638A CN 109704638 A CN109704638 A CN 109704638A CN 201811587518 A CN201811587518 A CN 201811587518A CN 109704638 A CN109704638 A CN 109704638A
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Abstract
The present invention relates to automotive fields, disclose a kind of brake spacer for automobile, the brake spacer for automobile includes the composition of following mass percent: modified graphene 5~10%, resin 5~10%, composite fibre 8~12%, aramid fiber 1~5%, modified large stretch of graphite 6~12%, modified petroleum coke 7~14%, barite 12~18%, rubber powder 1~5%, remaining as steel fibre.The present invention is used as filler to prepare brake spacer for automobile together using the modified petroleum coke of silicon fluoride, modified graphene and modified large stretch of graphite, the brake spacer for automobile of preparation has super wear resistance energy and heat-proof quality, and preparation process is simple, is suitble to large-scale production.
Description
Technical field
The present invention relates to automotive field more particularly to a kind of brake spacer for automobile.
Background technique
Brake facing is one of essential accessory of motor vehicles, is related to personal safety.Brake facing is main
It is made of binder, reinforcing material and friction filler three parts.When brake, brake facing and brake disc phase mutual friction, by vapour
The kinetic energy of vehicle is converted to thermal energy, the temperature moment rising of brake facing and brake disc.In addition, the dynamic friction of brake facing
Coefficient and its stopping power are positively correlated, and good brake must have sufficiently high coefficient of friction.Brake in the prior art
Liner is easy aging, and rub resistance ability is poor, and service life is very short.
The patent that Chinese Patent Application No. is 201710065190.9 discloses a kind of objective brake gland for vehicle, including with
Lower component: aramid fiber 3.9g, blanc fixe 19.5g, nitrile rubber 3.9g, Frication powder 3.9g, tyre talc 3.9g, graphite 13g, coke
13g, crystalline flake graphite 6.5g, antimony trisulfide 13g, aluminium oxide 5.2g, magnesia 5.2g and silica flour 5.2g.The car brake liner
Piece high temperature friction coefficient is stablized, and long service life, preparation method is simple, at low cost.However, due to graphite, coke and scale stone
The dispersibility of ink in a binder is poor, causes the intensity of the brake facing of preparation and wear-resisting property poor.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of brake spacer for automobile.The brake for cars
Liner has excellent crocking resistance and heat-proof quality, and service life greatly improves.
The specific technical proposal of the invention is: a kind of brake spacer for automobile, the composition including following mass percent:
Modified graphene 5~10%, resin 5~10%, composite fibre 8~12%, aramid fiber 1~5%, modified large stretch of graphite 6~12%,
Modified petroleum coke 7~14%, barite 12~18%, rubber powder 1~5%, remaining as steel fibre.
The present invention is using resin as binder, using modified graphene, modified large stretch of graphite, modified petroleum coke etc. as filler
Prepare brake facing.Modified graphene, modified large stretch of graphite, modified petroleum coke are uniformly dispersed in resin, and are formed
Crosslinking, considerably increases the integral strength and antifriction performance of brake facing, significantly improve with the intensity of brake facing and
Crocking resistance.Meanwhile modified graphene, modified large stretch of graphite, modified petroleum coke can be with the acyls in aramid fiber molecular structure
Amido forms hydrogen bond crosslinks, forms complicated network structure, so that containing several network structures: modified graphite in brake facing
The network structure of alkene, modified large stretch of graphite and modified petroleum coke itself rigidity, the network structure of aramid fiber itself, and modified stone
The complex network structure that amide groups in black alkene, modified large stretch of graphite, modified petroleum coke and aramid fiber molecular structure is formed, these
Complicated network structure can enhance the intensity and wear-resisting property of brake facing.
Preferably, the modified graphene is the graphene of 3- azido propionic acid graft modification.With 3- azido propionic acid
The graphene of graft modification will not destroy the intensity of graphene, while can increase dispersion performance of the graphene in resin.It is single
When solely using graphene as filler, due to graphite itself be easy reunite, the intensity and wear-resisting property of manufactured brake facing all compared with
Difference.The method of other modified graphenes generally can all destroy the interlayer structure of graphene, lead to the weakened of graphene, this hair
Bright method of modifying will not only destroy the interlayer structure of graphene, while can increase dispersibility of the graphene in resin,
Make to generate crosslinking between graphene and other fillers and aramid fiber, increases the intensity and wearability of brake facing.
Preferably, the modified graphene the preparation method comprises the following steps: by graphene be added concentration be 1~3wt% cholic acid
Dispersion liquid is made in the aqueous solution of sodium, 4- propynyloxy base weight pyridine tetrafluoroborate is added and is obtained in 40~50 DEG C of 7~9h of stirring
To 4- propynyloxy base phenyl graphene；The 4- propynyloxy base phenyl graphene and 3- azido propionic acid are added in THPTA, added
Enter sodium ascorbate and CuSO4, stirring 12~for 24 hours, dialysis removes impurity, obtains modified graphene after freeze-drying.The present invention
The method of modified graphene is simple, can be realized as under mild conditions.
Preferably, the mass ratio of the graphene and 4- propynyloxy base weight pyridine tetrafluoroborate is 1:0.3~0.5,
4- propynyloxy base weight pyridine tetrafluoroborate and 3- azido propionic acid, sodium ascorbate and CuSO4Molar ratio be 0.8~1:
The mass volume ratio of 0.8~1.2:1.8~2.2:1,4- propynyloxy base phenyl graphene and THPTA are 1g/60~80ml.
When the mass ratio of graphene and 4- propynyloxy base weight pyridine tetrafluoroborate is 1:0.3~0.5, modified graphite
Good dispersion of the alkene in resin.4- propynyloxy base weight pyridine tetrafluoroborate and 3- azido propionic acid, sodium ascorbate and
CuSO4Molar ratio be 0.8~1:0.8~1.2:1.8~2.2:1 when, 4- propynyloxy base weight pyridine tetrafluoroborate is in graphite
The grafting rate highest on alkene surface.When the mass volume ratio of 4- propynyloxy base phenyl graphene and THPTA are 1g/60~80ml,
4- propynyloxy base phenyl graphene and the rate of 3- azido propionic acid click-reaction are faster.
Preferably, the modified large stretch of graphite the preparation method comprises the following steps: large stretch of graphite is added in 0~2 DEG C of the concentrated sulfuric acid,
20~40min is stirred, the potassium permanganate of 0.1~0.2 times of large stretch of graphite quality is added, continuously adds 2.5 after stirring 15~20min
The potassium permanganate of~3 times of large stretch of graphite qualities, stirs 20~40min, controls solution temperature always and is no more than 5 DEG C；Increase solution
Temperature stirs 6~9h, obtains large stretch of graphite of oxidation modification after filtering, drying to 40~50 DEG C；By the big slabstone of oxidation modification
Ink is added in DMF, and the mass volume ratio of large stretch of graphite of oxidation modification and DMF are 0.5~1.5mg/1ml, and ultrasonic disperse 2~
The ethylenediamine of large stretch of graphite quality of 80~100 times of oxidation modifications and large stretch of graphite of 10~20 times of oxidation modifications is added in 3h
The Dicyclohexylcarbodiimide of amount, 3~5min of ultrasound obtain modified large stretch of graphite in 110~130 DEG C of 40~50h of reaction.
The modified large stretch of graphite of present invention ethylenediamine can increase the dispersibility of large stretch of graphite, while can be with modified graphite
Hydrogen bond crosslinks are formed between alkene, modified petroleum coke and aramid fiber, form complicated network structure.
Preferably, the mass volume ratio of the sheet graphite and the concentrated sulfuric acid is 1g/40~50ml.It is needed in the present invention stringent
The ratio and temperature of large stretch of graphite and the concentrated sulfuric acid are controlled, the amount of the concentrated sulfuric acid is excessive or reaction temperature is excessively high, be easy to cause big slabstone
The structure of ink is destroyed, and will affect the intensity of large stretch of graphite.
Preferably, the modified petroleum coke the preparation method comprises the following steps: by the petroleum coke of 100~200 mesh oxygenous
280~320 DEG C of 30~60min of heat preservation are risen to the heating rate of 10~30 DEG C/min under atmosphere, obtain the petroleum of pre-oxidation treatment
Coke；The hydrogen-oxygen potassium of the petroleum coke quality of 4~6 times of pre-oxidation treatments is added into the petroleum coke of pre-oxidation treatment, lazy
780~820 DEG C of 50~70min of heat preservation are risen to the heating rate of 10~15 DEG C/min under property atmosphere, obtain petroleum coke active carbon；
Obtained petroleum coke active carbon is dispersed in water, the dispersion liquid of 1~3mg/ml is made, the silicon fluoride solution mixing of hydrolysis is added
Uniformly, the mass ratio of petroleum coke active carbon and silicon fluoride is 5~8:1, then in 60~80 DEG C of 2~5h of stirring, obtains modified stone
Oil coke charcoal.
The present invention utilize silicon fluoride graft modification petroleum coke, modified petroleum coke can with modified graphene, change
Property sheet graphite and aramid fiber between form crosslinking, form complicated network structure, and after silicon fluoride graft modification, can
Improve the complex network structures formed between modified petroleum coke, modified graphene, modified large stretch of graphite and aramid fiber and binder
Compatibility between resin can significantly improve the intensity and wear-resisting property of brake facing.
Preferably, the silicon fluoride is trifluoromethyl trimethyl silyl, γ-trifluoro propyl methyl polysiloxane, three
Fluoropropyl methyl cyclotrisiloxane, two (3,3,3- trifluoro propyl) dimethoxysilanes, ten trifluoro octyl trimethoxy silanes, ten
At least one of difluoro heptyl propyl trimethoxy silicane.
Preferably, the resin is phenolic resin, the partial size of the rubber powder is 80~200 mesh.
Preferably, a kind of preparation method of brake spacer for automobile the following steps are included:
(1) resin, composite fibre, aramid fiber, barite and rubber powder are sufficiently mixed according to the proportion, are then added and match
The modified graphene of proportion, modified large stretch of graphite and modified petroleum coke, are added steel fibre and are uniformly mixed, obtain after being sufficiently mixed
Mixture；
(2) by mixture under the pressure of 10~16Mpa 1~3s of cold moudling, by the cold base and steel back that suppress 150
~160 DEG C, hot-forming 15~25min under the conditions of 15~18Mpa, finally in 180~200 DEG C of 12~14h of heat treatment, grinding,
Brake spacer for automobile is obtained after spraying and riveting attachment.
It is compared with the prior art, the beneficial effects of the present invention are: the present invention is using the modified petroleum coke of silicon fluoride, modification
Graphene and modified large stretch of graphite are used as filler to prepare brake spacer for automobile, the brake spacer for automobile tool of preparation together
There are super wear resistance energy and heat-proof quality, and preparation process is simple, is suitble to large-scale production.
Specific embodiment
The present invention will be further described with reference to the examples below.Related device, connection structure in the present invention
And method, if being device well known in the art, connection structure and method without refering in particular to.
Embodiment 1
A kind of brake spacer for automobile, the composition including following mass percent: modified graphene 8%, resin 8%,
Composite fibre 10%, aramid fiber 3%, modified large stretch of graphite 9%, modified petroleum coke 10%, barite 15%, 3% and of rubber powder
Steel fibre 34%.
The modified graphene is the graphene of 3- azido propionic acid graft modification.Preparation method are as follows: by graphene plus
Enter in the aqueous solution for the sodium taurocholate that concentration is 2wt% and dispersion liquid is made, 4- propynyloxy base weight pyridine tetrafluoroborate, graphite is added
The mass ratio of alkene and 4- propynyloxy base weight pyridine tetrafluoroborate obtains 4- propynyloxy base phenyl in 45 DEG C of stirring 8h for 1:0.4
Graphene；The 4- propynyloxy base phenyl graphene and 3- azido propionic acid are added in THPTA, the 4- propynyloxy base phenyl
The mass volume ratio of graphene and THPTA are 1g/70ml, and sodium ascorbate and CuSO is added4, 4- propynyloxy base weight pyridine tetrafluoro
Borate and 3- azido propionic acid, sodium ascorbate and CuSO4Molar ratio be 1:1:2:1, stir 18h, dialysis remove impurity,
Modified graphene is obtained after freeze-drying.
The modified large stretch of graphite the preparation method comprises the following steps: large stretch of graphite is added in 0 DEG C of the concentrated sulfuric acid, the sheet graphite
Mass volume ratio with the concentrated sulfuric acid is 1g/45ml, stirs 30min, and the potassium permanganate of 0.15 times of large stretch of graphite quality, stirring is added
The potassium permanganate that 2.8 times of large stretch of graphite qualities are continuously added after 18min, stirs 30min, controls solution temperature always and is no more than 5
℃；Solution temperature is increased to 45 DEG C, 7.5h is stirred, obtains large stretch of graphite of oxidation modification after filtering, drying；By oxidation modification
Large stretch of graphite is added in DMF, and large stretch of graphite of oxidation modification and the mass volume ratio of DMF are 1mg/1ml, ultrasonic disperse 2.5h,
The dicyclohexyl of the ethylenediamine of large stretch of graphite quality of 90 times of oxidation modifications and large stretch of graphite quality of 15 times of oxidation modifications is added
Carbimide, ultrasonic 4min obtain modified large stretch of graphite in 120 DEG C of reaction 45h.
The modified petroleum coke the preparation method comprises the following steps: by the petroleum coke of 150 mesh under an oxygen-containing atmosphere with 20 DEG C/min
Heating rate rise to 300 DEG C of heat preservation 45min, obtain the petroleum coke of pre-oxidation treatment；To the petroleum coke of pre-oxidation treatment
The hydrogen-oxygen potassium of the middle petroleum coke quality that 5 times of pre-oxidation treatments are added, under an inert atmosphere with the heating rate liter of 13 DEG C/min
To 800 DEG C of heat preservation 60min, petroleum coke active carbon is obtained；Obtained petroleum coke active carbon is dispersed in water, is made 2mg/ml's
Dispersion liquid, the trifluoromethyl trimethyl silyl solution that hydrolysis is added are uniformly mixed, petroleum coke active carbon and trifluoromethyl front three
The mass ratio of base monosilane obtains modified petroleum coke then in 70 DEG C of stirring 3.5h for 7:1.
The resin is phenolic resin, and the partial size of the rubber powder is 150 mesh.
A kind of preparation method of brake spacer for automobile the following steps are included:
(1) resin, composite fibre, aramid fiber, barite and rubber powder are sufficiently mixed according to the proportion, are then added and match
The modified graphene of proportion, modified large stretch of graphite and modified petroleum coke, are added steel fibre and are uniformly mixed, obtain after being sufficiently mixed
Mixture；
(2) by mixture under the pressure of 13Mpa cold moudling 2s, by the cold base suppressed and steel back 155 DEG C,
Hot-forming 20min under the conditions of 16Mpa finally obtains automobile system after 190 DEG C of heat treatment 13h, grinding, spraying and riveting attachment
Dynamic device liner.
Embodiment 2
A kind of brake spacer for automobile, the composition including following mass percent: modified graphene 10%, resin
10%, composite fibre 8%, aramid fiber 5%, modified large stretch of graphite 6%, modified petroleum coke 14%, barite 12%, rubber powder
1% and steel fibre 34%.
The modified graphene is the graphene of 3- azido propionic acid graft modification.Preparation method are as follows: by graphene plus
Enter in the aqueous solution for the sodium taurocholate that concentration is 1wt% and dispersion liquid is made, 4- propynyloxy base weight pyridine tetrafluoroborate is added, it is described
The mass ratio of graphene and 4- propynyloxy base weight pyridine tetrafluoroborate obtains 4- propynyloxy base in 50 DEG C of stirring 7h for 1:0.3
Phenyl graphene；The 4- propynyloxy base phenyl graphene and 3- azido propionic acid are added in THPTA, 4- propynyloxy base phenyl
The mass volume ratio of graphene and THPTA are 1g/60ml, and sodium ascorbate and CuSO is added4, 4- propynyloxy base weight pyridine tetrafluoro
Borate and 3- azido propionic acid, sodium ascorbate and CuSO4Molar ratio be 0.8:1.2:1.8:1, stirring for 24 hours, dialysis removes
Decontamination obtains modified graphene after freeze-drying.
The modified large stretch of graphite the preparation method comprises the following steps: large stretch of graphite is added in 1 DEG C of the concentrated sulfuric acid, the sheet graphite
Mass volume ratio with the concentrated sulfuric acid is 1g/40ml, stirs 20min, and the potassium permanganate of 0.1 times of large stretch of graphite quality, stirring is added
The potassium permanganate that 2.5 times of large stretch of graphite qualities are continuously added after 15min, stirs 20min, controls solution temperature always and is no more than 5
℃；Solution temperature is increased to 50 DEG C, 6h is stirred, obtains large stretch of graphite of oxidation modification after filtering, drying；By the big of oxidation modification
Piece graphite is added in DMF, and large stretch of graphite of oxidation modification and the mass volume ratio of DMF are 0.5mg/1ml, and ultrasonic disperse 2h adds
Enter the dicyclohexyl carbon of the ethylenediamine of large stretch of graphite quality of 80 times of oxidation modifications and large stretch of graphite quality of 10 times of oxidation modifications
Acid imide, ultrasonic 3min obtain modified large stretch of graphite in 110 DEG C of reaction 50h.
The modified petroleum coke the preparation method comprises the following steps: by the petroleum coke of 100 mesh under an oxygen-containing atmosphere with 10 DEG C/min
Heating rate rise to 320 DEG C of heat preservation 30min, obtain the petroleum coke of pre-oxidation treatment；To the petroleum coke of pre-oxidation treatment
The hydrogen-oxygen potassium of the middle petroleum coke quality that 4 times of pre-oxidation treatments are added, under an inert atmosphere with the heating rate liter of 15 DEG C/min
To 820 DEG C of heat preservation 50min, petroleum coke active carbon is obtained；Obtained petroleum coke active carbon is dispersed in water, is made 1mg/ml's
Dispersion liquid, the trifluoro propyl methyl cyclotrisiloxane solution that hydrolysis is added are uniformly mixed, petroleum coke active carbon and trifluoro propyl first
The mass ratio of basic ring trisiloxanes obtains modified petroleum coke then in 80 DEG C of stirring 2h for 5:1.
The resin is phenolic resin, and the partial size of the rubber powder is 200 mesh.
A kind of preparation method of brake spacer for automobile the following steps are included:
(1) resin, composite fibre, aramid fiber, barite and rubber powder are sufficiently mixed according to the proportion, are then added and match
The modified graphene of proportion, modified large stretch of graphite and modified petroleum coke, are added steel fibre and are uniformly mixed, obtain after being sufficiently mixed
Mixture；
(2) by mixture under the pressure of 16Mpa cold moudling 1s, by the cold base suppressed and steel back 150 DEG C,
Hot-forming 15min under the conditions of 18Mpa finally obtains automobile system after 180 DEG C of heat treatment 14h, grinding, spraying and riveting attachment
Dynamic device liner.
Embodiment 3
A kind of brake spacer for automobile, the composition including following mass percent: modified graphene 10%, resin
10%, composite fibre 10%, aramid fiber 3%, modified large stretch of graphite 6%, modified petroleum coke 14%, barite 18%, rubber powder
3% and steel fibre 26%.
The modified graphene is the graphene of 3- azido propionic acid graft modification.Preparation method are as follows: by graphene plus
Enter in the aqueous solution for the sodium taurocholate that concentration is 2wt% and dispersion liquid is made, 4- propynyloxy base weight pyridine tetrafluoroborate is added, it is described
The mass ratio of graphene and 4- propynyloxy base weight pyridine tetrafluoroborate obtains 4- propynyloxy base in 40 DEG C of stirring 9h for 1:0.5
Phenyl graphene；The 4- propynyloxy base phenyl graphene and 3- azido propionic acid are added in THPTA, 4- propynyloxy base phenyl
The mass volume ratio of graphene and THPTA are 1g/80ml, and sodium ascorbate and CuSO is added4, 4- propynyloxy base weight pyridine tetrafluoro
Borate and 3- azido propionic acid, sodium ascorbate and CuSO4Molar ratio be 1:1:2.2:1, stirring for 24 hours, dialysis remove impurity elimination
Matter obtains modified graphene after freeze-drying.
The modified large stretch of graphite the preparation method comprises the following steps: large stretch of graphite is added in 2 DEG C of the concentrated sulfuric acid, the sheet graphite
Mass volume ratio with the concentrated sulfuric acid is 1g/40ml, stirs 20min, and the potassium permanganate of 0.2 times of large stretch of graphite quality, stirring is added
The potassium permanganate that 2.5 times of large stretch of graphite qualities are continuously added after 20min, stirs 30min, controls solution temperature always and is no more than 5
℃；Solution temperature is increased to 40 DEG C, 9h is stirred, obtains large stretch of graphite of oxidation modification after filtering, drying；By the big of oxidation modification
Piece graphite is added in DMF, and large stretch of graphite of oxidation modification and the mass volume ratio of DMF are 1.5mg/1ml, and ultrasonic disperse 2h adds
Enter the dicyclohexyl carbon of the ethylenediamine of large stretch of graphite quality of 100 times of oxidation modifications and large stretch of graphite quality of 20 times of oxidation modifications
Acid imide, ultrasonic 5min obtain modified large stretch of graphite in 110 DEG C of reaction 50h.
The modified petroleum coke the preparation method comprises the following steps: by the petroleum coke of 100 mesh under an oxygen-containing atmosphere with 15 DEG C/min
Heating rate rise to 280 DEG C of heat preservation 60min, obtain the petroleum coke of pre-oxidation treatment；To the petroleum coke of pre-oxidation treatment
The hydrogen-oxygen potassium of the middle petroleum coke quality that 6 times of pre-oxidation treatments are added, under an inert atmosphere with the heating rate liter of 10 DEG C/min
To 780 DEG C of heat preservation 60min, petroleum coke active carbon is obtained；Obtained petroleum coke active carbon is dispersed in water, is made 1mg/ml's
Dispersion liquid, the ten trifluoro octyl trimethoxy silane solution that hydrolysis is added are uniformly mixed, petroleum coke active carbon and ten trifluoro octyls
The mass ratio of trimethoxy silane obtains modified petroleum coke then in 70 DEG C of stirring 4h for 5:1.
The resin is phenolic resin, and the partial size of the rubber powder is 80 mesh.
A kind of preparation method of brake spacer for automobile the following steps are included:
(1) resin, composite fibre, aramid fiber, barite and rubber powder are sufficiently mixed according to the proportion, are then added and match
The modified graphene of proportion, modified large stretch of graphite and modified petroleum coke, are added steel fibre and are uniformly mixed, obtain after being sufficiently mixed
Mixture；
(2) by mixture under the pressure of 10Mpa cold moudling 3s, by the cold base suppressed and steel back 160 DEG C,
Hot-forming 15min under the conditions of 15Mpa finally obtains automobile system after 180 DEG C of heat treatment 14h, grinding, spraying and riveting attachment
Dynamic device liner.
Comparative example 1
Comparative example 1 and be embodiment 1 the difference is that: replace modification with unmodified graphene during the preparation process
Graphene, other are same as Example 1.
Comparative example 2
Comparative example 2 and be embodiment 1 the difference is that: replace changing with unmodified petroleum coke during the preparation process
Property petroleum coke, other are same as Example 1.
Comparative example 3
Comparative example 3 and be embodiment 1 the difference is that: do not change during the preparation process using unmodified graphene and
Property large stretch of graphite replace modified graphene and modified large stretch of graphite, other are same as Example 1.
Comparative example 4
Comparative example 4 and be embodiment 1 the difference is that: during the preparation process using unmodified petroleum coke and not
Modified large stretch of graphite replaces modified petroleum coke and modified large stretch of graphite, other are same as Example 1.
Comparative example 5
Comparative example 5 and be embodiment 1 the difference is that: do not change during the preparation process using unmodified graphene and
Property petroleum coke replace modified graphene and modified petroleum coke, other are same as Example 1.
Comparative example 6
Comparative example 6 and be embodiment 1 the difference is that: during the preparation process using unmodified graphene, do not change
Property large stretch of graphite and unmodified petroleum coke replace modified graphene, modified large stretch of graphite and modified petroleum coke, other
It is same as Example 1.
To brake spacer for automobile prepared by Examples 1 to 3 and comparative example 1~6, its appearance, frictional property are tested respectively
Energy, wear rate, shear strength, coefficient of thermal expansion and compression strain.As a result as shown in table 1 below.
Table 1
As can be seen from Table 1, modified graphene is used during the preparation in brake spacer for automobile, is modified greatly
When piece graphite and modified petroleum coke are as filler, brake spacer for automobile obtained has excellent wearability, lower
Wear rate, higher shear strength, lower coefficient of thermal expansion and compression strain, significantly improve the wearability of automobile brake(-holder) block
Energy and service life.The properties of automobile brake(-holder) block made from comparative example all with it is of the invention be automobile made from strength
The performance of brake facing has biggish gap.Illustrate that only comprehensive performance could be obtained using formula and method of the invention
Excellent brake spacer for automobile.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification, change and equivalent structure transformation to the above embodiments, still fall within skill of the present invention
The protection scope of art scheme.
Claims (10)
1. a kind of brake spacer for automobile, it is characterised in that the composition including following mass percent: modified graphene 5~
10%, resin 5~10%, composite fibre 8~12%, aramid fiber 1~5%, modified large stretch of graphite 6~12%, modified petroleum coke 7
~14%, barite 12~18%, rubber powder 1~5%, remaining as steel fibre.
2. a kind of brake spacer for automobile as described in claim 1, it is characterised in that: the modified graphene is 3- nitrine
The graphene of base propionic acid graft modification.
3. a kind of brake spacer for automobile as claimed in claim 2, it is characterised in that: the preparation side of the modified graphene
Method are as follows: graphene is added in the aqueous solution for the sodium taurocholate that concentration is 1~3wt% and dispersion liquid is made, 4- propynyloxy base weight is added
Pyridine tetrafluoroborate obtains 4- propynyloxy base phenyl graphene in 40~50 DEG C of 7~9h of stirring；By the 4- propynyloxy base
Phenyl graphene and 3- azido propionic acid are added in THPTA, and sodium ascorbate and CuSO is added4, stirring 12~for 24 hours, dialysis removes
Decontamination obtains modified graphene after freeze-drying.
4. a kind of brake spacer for automobile as claimed in claim 3, it is characterised in that: the graphene and 4- propynyloxy base
The mass ratio of diazobenzene tetrafluoroborate is 1:0.3~0.5,4- propynyloxy base weight pyridine tetrafluoroborate and 3- azido third
Acid, sodium ascorbate and CuSO4Molar ratio be 0.8~1:0.8~1.2:1.8~2.2:1,4- propynyloxy base phenyl graphene
Mass volume ratio with THPTA is 1g/60~80ml.
5. a kind of brake spacer for automobile as described in claim 1, it is characterised in that: the preparation of modified large stretch of graphite
Method are as follows: large stretch of graphite is added in 0~2 DEG C of the concentrated sulfuric acid, stirs 20~40min, 0.1~0.2 times of large stretch of graphite is added
The potassium permanganate of amount, stirs the potassium permanganate that 2.5~3 times of large stretch of graphite qualities are continuously added after 15~20min, and stirring 20~
40min controls solution temperature always and is no more than 5 DEG C；Solution temperature is increased to 40~50 DEG C, 6~9h is stirred, after filtering, drying
Obtain large stretch of graphite of oxidation modification；Large stretch of graphite of oxidation modification is added in DMF, the large stretch of graphite and DMF of oxidation modification
Mass volume ratio be 0.5~1.5mg/1ml, 2~3h of ultrasonic disperse, be added 80~100 times of oxidation modifications large stretch of graphite
The Dicyclohexylcarbodiimide of the ethylenediamine of amount and large stretch of graphite quality of 10~20 times of oxidation modifications, 3~5min of ultrasound,
110~130 DEG C of 40~50h of reaction obtain modified large stretch of graphite.
6. a kind of brake spacer for automobile as claimed in claim 5, it is characterised in that: the sheet graphite and the concentrated sulfuric acid
Mass volume ratio is 1g/40~50ml.
7. a kind of brake spacer for automobile as described in claim 1, it is characterised in that: the preparation of the modified petroleum coke
Method are as follows: the petroleum coke of 100~200 mesh is risen to 280~320 under an oxygen-containing atmosphere with the heating rate of 10~30 DEG C/min
DEG C heat preservation 30~60min, obtain the petroleum coke of pre-oxidation treatment；4~6 times are added into the petroleum coke of pre-oxidation treatment in advance
The hydrogen-oxygen potassium of the petroleum coke quality of oxidation processes, 780 are risen under an inert atmosphere with the heating rate of 10~15 DEG C/min~
820 DEG C of 50~70min of heat preservation, obtain petroleum coke active carbon；Obtained petroleum coke active carbon is dispersed in water, it is made 1~
The dispersion liquid of 3mg/ml, the silicon fluoride solution that hydrolysis is added are uniformly mixed, and the mass ratio of petroleum coke active carbon and silicon fluoride is 5~
8:1 obtains modified petroleum coke then in 60~80 DEG C of 2~5h of stirring.
8. a kind of brake spacer for automobile as claimed in claim 7, it is characterised in that: the silicon fluoride is trifluoromethyl three
Methyl silicane, γ-trifluoro propyl methyl polysiloxane, trifluoro propyl methyl cyclotrisiloxane, two (3,3,3- trifluoro propyls)
At least one of dimethoxysilane, ten trifluoro octyl trimethoxy silanes, ten difluoro heptyl propyl trimethoxy silicanes.
9. a kind of brake spacer for automobile as described in claim 1, it is characterised in that: the resin is phenolic resin, institute
The partial size for stating rubber powder is 80~200 mesh.
10. a kind of brake spacer for automobile as described in claim 1, it is characterised in that preparation method includes following step
It is rapid:
(1) resin, composite fibre, aramid fiber, barite and rubber powder are sufficiently mixed according to the proportion, proportional quantity is then added
Modified graphene, modified large stretch of graphite and modified petroleum coke, steel fibre is added after being sufficiently mixed and is uniformly mixed, is mixed
Material；
(2) by mixture under the pressure of 10~16Mpa 1~3s of cold moudling, by the cold base suppressed and steel back 150~
160 DEG C, hot-forming 15~25min under the conditions of 15~18Mpa, finally in 180~200 DEG C of 12~14h of heat treatment, grinding, spray
Brake spacer for automobile is obtained after painting and riveting attachment.
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| CN201811587518.4A CN109704638B (en) | 2018-12-25 | 2018-12-25 | Brake lining for automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811587518.4A CN109704638B (en) | 2018-12-25 | 2018-12-25 | Brake lining for automobile |
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| CN109704638A true CN109704638A (en) | 2019-05-03 |
| CN109704638B CN109704638B (en) | 2021-03-26 |
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| CN201811587518.4A Active CN109704638B (en) | 2018-12-25 | 2018-12-25 | Brake lining for automobile |
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| CN102720779A (en) * | 2012-05-25 | 2012-10-10 | 广东富华重工制造有限公司 | Drum brake lining comprising plate alumina and manufacturing method thereof |
| CN102758870A (en) * | 2012-07-20 | 2012-10-31 | 十堰市九霄摩擦材料有限公司 | Car brake friction lining and preparation method thereof |
| CN105801014A (en) * | 2016-03-17 | 2016-07-27 | 山东金麒麟股份有限公司 | Multielement silane coupling agent-modified phenolic resin base combined disc brake pad and preparation method thereof |
| CN106051001A (en) * | 2015-11-24 | 2016-10-26 | 王永红 | Environmentally friendly three-dimensional composite reinforced organic brake pad and preparation technology thereof |
| CN106118597A (en) * | 2016-06-29 | 2016-11-16 | 晋江凯燕新材料科技有限公司 | The friction material of transmission braking and goods |
| CN106594135A (en) * | 2017-02-06 | 2017-04-26 | 张培明 | Brake lining for bus |
| CN106870608A (en) * | 2017-03-01 | 2017-06-20 | 杭州安耐特实业有限公司 | A kind of Graphene brake pad material and its manufacture method |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330763A (en) * | 2011-07-22 | 2012-01-25 | 江苏安捷汽车配件有限公司 | Nano-material-added car brake block and method for manufacturing same |
| CN102720779A (en) * | 2012-05-25 | 2012-10-10 | 广东富华重工制造有限公司 | Drum brake lining comprising plate alumina and manufacturing method thereof |
| CN102758870A (en) * | 2012-07-20 | 2012-10-31 | 十堰市九霄摩擦材料有限公司 | Car brake friction lining and preparation method thereof |
| CN106051001A (en) * | 2015-11-24 | 2016-10-26 | 王永红 | Environmentally friendly three-dimensional composite reinforced organic brake pad and preparation technology thereof |
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| CN106594135A (en) * | 2017-02-06 | 2017-04-26 | 张培明 | Brake lining for bus |
| CN106870608A (en) * | 2017-03-01 | 2017-06-20 | 杭州安耐特实业有限公司 | A kind of Graphene brake pad material and its manufacture method |
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| CN109704638B (en) | 2021-03-26 |
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