CN108623988A - A kind of graphene/phenolic resin composite and application thereof - Google Patents
A kind of graphene/phenolic resin composite and application thereof Download PDFInfo
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C08L2205/00—Polymer mixtures characterised by other features
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Abstract
The invention discloses a kind of graphene/phenolic resin composites and application thereof, which is made by following preparation method：By graphene and phenolic resin melt blending, filler is added after mixing, is kneaded on open mill, by crushing material after mixing, compression molding prepares composite material, then cures to get surface modified graphene oxide composite material.It has the beneficial effect that：Composite materials property of the present invention is good, friction coefficient is high, low wear rate, and graphene used has that hydrophily is low, dispersion stabilization and the advantage that uniformity is good, thermal stability is strong in the polymer；Purposes of the composite material in preparing automobile brake lining plate, automotive brake pads and clutch disc and wiping material.
Description
Technical field
The present invention relates to new material technology fields, more particularly, to a kind of graphene/phenolic resin composite and its use
On the way.
Background technology
Phenolic resin is cheap with its, good in thermal property, mechanical strength are high after solidification, electrical insulating property is good, Flame-retardant low-smoke
Can good, the excellent performance characteristics such as high temperature resistant creep properties is excellent, and performance is stablized and be widely used in many fields.But phenolic aldehyde tree
Fat has that solidification temperature is excessively high, the resins such as brittleness is bigger, shrinking percentage is high, alkaline-resisting too late epoxy resistant to chemical etching, and mechanical property
It can so that the application of pure phenolic resin is much limited the shortcomings of poor, the easy moisture absorption, poor electrical performance, many high-end necks cannot be met
The requirement in domain, so various graphene/phenolic resin composites increasingly attract attention.The study on the modification of phenolic resin
There are very long history, modification mode also to have very much.Macromolecule modified, mineral-modified, nano material can be divided at present to change
The methods of property, this is classified with the difference of modified material.These method of modifying can be from different performance, different application field
To reach physics or chemical modification purpose to phenolic resin.Wherein come in recent years, graphene has obtained extensively in nano material
General application.The superior characteristic such as bulk effect, skin effect, quantum size that graphene shows, make its graphene/
Phenolic resin composite, the application prospect all arrived very much in terms of improving phenolic resin electrical property, heat resistance.But stone
The surface energy of black alkene and graphene oxide is relatively high, if not being surface-treated to it, will reunite, or even accumulate again
At graphite.Therefore surface modification is carried out to graphene and graphene oxide, and improve it and be dispersed in enhancing oxidation stone in matrix
The interface interaction of black alkene and basis material is vital in composite material research application.The special structure of graphene imparts
Its many special performance, excellent electric conductivity, hot property and mechanical performance can compare favourably with carbon nanotube, so, it
The electric conductivity, heat conductivility and mechanical performance of polymer can be improved as ideal filler as carbon nanotube, and
And only need lower graphene content can significantly improve composite material needs performance.
The prior art such as Authorization Notice No. is the Chinese invention patent of 104627994 B of CN, discloses a kind of reduction-oxidation
The preparation method of graphene/phenolic resin-based activated carbon in-situ composite, by phenol, formaldehyde, catalyst in molar ratio 1:1-
3:The ratio of 0.01-0.05 mixes, and obtains mixed liquor；Graphite oxide is ultrasonically treated in deionized water, ultrasonic time 5-
90min, ultrasonic power 500-1000W obtain the graphene oxide solution of a concentration of 0.1-10mg/mL；By graphene oxide
Solution is scattered in mixed liquor, and after reacting 0.5-4h at 75-95 DEG C, curing agent is added, lasting to stir, to the end of reaction, production
Object just obtains graphite oxide/phenolic resin In-situ reaction object after dehydration, drying, grinding, and the compound is again through subsequently carbonizing, living
Redox graphene/activity Carbon composites are made in the processing steps such as change.Compound realizes oxidation stone obtained by the preparation method
Black alkene good dispersibility and strong interaction between graphene oxide and Activated carbon matrix in Activated carbon matrix, to
Enhance the chemical property advantage of composite material.But the unsuitable industrialized production of the preparation method, and the graphite oxide that must be beaten/
The mechanical property and wear-resisting property of phenolic resin In-situ reaction object do not obtain raising by a relatively large margin, limit its scope of application.
Invention content
That one of the objects of the present invention is to provide a kind of mechanical properties is good, friction coefficient is high, low wear rate, graphene used
Low with hydrophily, dispersion stabilization and uniformity is good, thermal stability is strong advantage in the polymer graphene/phenolic aldehyde tree
Resin composite material.
The second object of the present invention is that providing one kind preparing automobile brake lining plate, automotive brake pads and clutch disc use
Wipe the purposes of graphene/phenolic resin composite of the purposes in material.
The present invention in view of the above technology in the problem of mentioning, the technical solution taken is：
Weight ratio is 0.02-1 by a kind of preparation method of graphene/phenolic resin composite:100 graphene and phenolic aldehyde
Resin melting is blended, and melt blending extrusion temperature is 130-140 DEG C, filler is added after mixing, on open mill
Be kneaded, by crushing material after mixing, under conditions of temperature is 165-170 DEG C, pressure is 4-6MPa compression molding prepare compound
Then material is according to program curing：118-122℃1.5-2.5h、138-142℃1.5-2.5h、158-162℃1.5-
2.5h, 178-182 DEG C of 1.5-2.5h solidifications are to get surface modified graphene oxide composite material.Due to the hydroxyl on KH550 and GO
Base dehydrating condensation so that modified GO hydrophilic radicals are reduced, lipophile enhances, and can be effectively improved between GO and PF matrixes
Interface interaction, PF can be effectively improved to make the mechanical property of PF composite materials be improved by improving dispersibilities of the GO in PF
The creep of composite material and stress relaxation ability, while modified GO thermal stability improves, and is not easily decomposed at high temperature, in turn
It improves the friction coefficient of composite material, reduce its wear rate, and in friction process, it is rigid filled to be not easy to fall off from material,
Wear surface is smooth.
Preferably, the additive amount of curing accelerator is the 0.65-0.7% of phenolic resin weight, carbonic acid in curing accelerator
The molar ratio of acrylic ester, diisocyanate and octadecanoic acid is 1:1.4-1.5:0.02-0.03.Ester group in curing accelerator
It is active to play the role of increase phenolic resin methylol, the chain tra nsfer of ester occurs, phenolic resin forms quinone structure later, originally
Propene carbonate forms carboxylate, can significantly increase the active site of resin, reduces the activation energy of resin solidification, improves phenolic aldehyde tree
The solidification rate of fat, reduces the solidification temperature of resin, and addition can improve the activity of ester group on propene carbonate, promote ester
Chain tra nsfer generation, while the carboxylate that can promote the hydroxyl on phenolic resin that can be formed with propene carbonate and two different
Polyisocyanate reactant generates complicated three-dimensional network material so that there are partially crystallizables and microphase-separated for composite material, contain hydroxyl
Benzene ring structure can be regarded as crosslinking points, to improving the mechanical property of composite material, simultaneously as cross-linking and curing reaction
Occur, causes the entanglement between molecule segment close, to increase the interior frictional resistance that molecule segment is subject to during exercise.
Preferably, graphene is surface modified graphene oxide, the method for modifying of graphene is：It is 1 by weight:
17-22 is added graphene oxide into the KH550 solution of a concentration of 1.8-2.3%, and 22-25h, reaction knot are reacted at 75-85 DEG C
It centrifuges, washs after beam, low temperature drying obtains surface modified graphene oxide.KH550 has unique-NH2, can be with oxidation
Carboxyl, epoxy reaction in graphene level so that KH550 can insert graphite oxide interlayer, be grafted on graphene oxide
On, Long carbon chain is introduced on its surface, changes its ordered structure, increases its contact angle, thereby reduce the hydrophily of GO interlayers,
Increase lipophile, the dispersibility of graphene oxide in the polymer is improved, simultaneously because-NH2 the reductions of KH550, make GO
It removes major part and contains functional group, generate more stable carbonnitrogen bond, have the thermal stability of similar graphite, in height
It is not easily decomposed under temperature, and the alkalinity of KH550 is enough to be catalyzed the intermolecular condensation of silanol, acid need not be added or alkali adjusts reactant
The pH value of system saves the dosage of reagent, reduces manufacturing cost.
Further preferably, the tartaric acid containing 0.03-0.05mM in KH550 solution contains 0.027- in tartaric acid
0.032% L-TARTARIC ACID.The addition of tartaric acid can avoid causing graphene oxide due to the-NH2 reductions of KH550
It stacks and assembles so that GO lamellas are uniformly dispersed, so that graphene oxide has preferable compatibility with polymer, finally
Surface modified graphene oxide dispersion stabilization in the polymer and uniformity are improved, mainly with the dispersion of monolithic layer or thin layer
Form is present in polymeric matrix, while tartaric acid can be connected in graphene oxide layer, is graphene oxide layer
Upper offer segment polarity group can promote KH550 and GO to provide binding site for silane coupler modified graphene
Between reaction between amino and epoxy, improve the grafting rate of graphene oxide, it is dispersed in the polymer to improve graphene oxide.
The invention also discloses graphene/phenolic aldehyde made from a kind of preparation method of graphene/phenolic resin composite
Resin composite materials.
A kind of purposes of graphene/phenolic resin composite, is preparing automobile brake lining plate, automotive brake pads and clutch
The device piece purposes wiped in material, the ingredient and its weight of friction material are divided into：Graphene/phenolic resin composite 5-13
Part, 2-6 parts of steel fibre, 3-10 parts of basalt fibre, 10-15 parts of aramid fiber, 1-5 parts of graphite whisker, 1-3 parts of chromite, sulfuric acid
3-10 parts of zinc, 1-3 parts of aluminium oxide, 15-25 parts of flyash, 5-10 parts of barium sulfate.The friction material have stable friction coefficient,
Low wear rate, preferable heat resistanceheat resistant degenerative, the feature that heat resistance is strong and mechanical strength is high, compared with traditional friction material,
Comprehensive performance, which has, significantly to be improved.
Compared with the prior art, the advantages of the present invention are as follows：1）The present invention carries out surface using KH550 to graphene oxide
It is modified so that KH550 can insert graphite oxide interlayer, be grafted on graphene oxide, and without stacking and aggregation, grafting rate
Height, method of modifying simple possible can save the dosage of reagent, reduce manufacturing cost；2）The surface modified graphene oxide is hydrophilic
Property it is low, in the polymer have good dispersion stabilization and uniformity, thermal stability is strong, is not easily decomposed at high temperature, expand
The big use scope of graphene oxide；3）Composite material is made using melt-blending process in the present invention, and preparation method is simple, high
Effect, need not be added organic solvent, and relatively inexpensive environmental protection is suitable for industrialized production, the mechanical property of PF composite materials obtained
It is good, the friction coefficient of composite material can be improved, reduce its wear rate, and in friction process, it is rigid filled to be not easy from material
It falls off, wear surface is smooth.
Figure of description
Fig. 1 is influence of the modification of GO in embodiment 5 to PF creep of composite materials performances；
Fig. 2 is influence of the modification of GO in embodiment 5 to PF composite material stress relaxations；
Fig. 3 is influence of the modification of GO in embodiment 5 to PF friction coefficient of composite material；
Fig. 4 is influence of the modification of GO in embodiment 5 to PF worn composite rates；
Fig. 5 is the stereoscan photograph in worn composite face in embodiment 5.
Specific implementation mode
The present invention program is described further below by embodiment：
Embodiment 1：
Weight ratio is 0.02 by a kind of preparation method of graphene/phenolic resin composite:100 graphene and phenolic aldehyde tree
Fat melt blending, melt blending extrusion temperature are 140 DEG C, and filler is added after mixing, is kneaded on open mill, mixes
By crushing material after refining, under conditions of temperature is 165 DEG C, pressure is 6MPa compression molding prepare composite material, then according to
Program curing is：118 DEG C of 2.5h, 138 DEG C of 2.5h, 158 DEG C of 2.5h, 178 DEG C of 2.5h solidifications are to get surface modified graphene oxide
Composite material.Since the hydroxyls dehydrate on KH550 and GO is condensed so that modified GO hydrophilic radicals are reduced, lipophile enhances,
The interface interaction that can be effectively improved between GO and PF matrixes improves dispersibilities of the GO in PF, to make PF composite materials
Mechanical property is improved, and can effectively improve creep and the stress relaxation ability of PF composite materials, while modified GO heat is steady
Qualitative raising, is not easily decomposed at high temperature, and then improves the friction coefficient of composite material, reduces its wear rate, and rubbed
Cheng Zhong, rigid filled to be not easy to fall off from material, wear surface is smooth.
The additive amount of curing accelerator is the 0.65% of phenolic resin weight, propene carbonate, two isocyanides in curing accelerator
The molar ratio of acid esters and octadecanoic acid is 1:1.5:0.02.Ester group in curing accelerator, which plays, increases phenolic resin methylol
The chain tra nsfer of ester occurs for active effect, and phenolic resin forms quinone structure later, and propene carbonate originally forms carboxylate,
The active site that resin can significantly be increased, reduces the activation energy of resin solidification, improves the solidification rate of phenolic resin, reduces resin
Solidification temperature, and addition can improve the activity of ester group on propene carbonate, promote the generation of the chain tra nsfer of ester, while energy
Enough promote the hydroxyl on phenolic resin that can generate complexity with the carboxylate and di-isocyanate reaction of propene carbonate formation
Three-dimensional network material so that there are partially crystallizable and microphase-separated, the benzene ring structure containing hydroxyl can be regarded as composite material
Crosslinking points simultaneously as the generation of cross-linking and curing reaction, cause between molecule segment to improve the mechanical property of composite material
Entanglement it is close, to increase the interior frictional resistance that molecule segment is subject to during exercise.
Graphene is surface modified graphene oxide, and the method for modifying of graphene is：It is 1 by weight:22 will aoxidize stone
Black alkene is added in a concentration of 1.8% KH550 solution, and 22h is reacted at 85 DEG C, is centrifuged after reaction, washing, low temperature drying,
Obtain surface modified graphene oxide.KH550 has unique-NH2, can be with carboxyl, the epoxy in graphene oxide level
Base reacts so that KH550 can insert graphite oxide interlayer, be grafted on graphene oxide, introduce Long carbon chain on its surface, change
Become its ordered structure, increase its contact angle, thereby reduce the hydrophily of GO interlayers, increase lipophile, improves graphite oxide
The dispersibility of alkene in the polymer, simultaneously because-NH2 the reductions of KH550, make GO remove major part and contain functional group,
More stable carbonnitrogen bond is generated, has the thermal stability of similar graphite, is not easily decomposed at high temperature, and KH550
Alkalinity is enough to be catalyzed the intermolecular condensation of silanol, need not add acid or alkali adjusts the pH value of reaction system, save the use of reagent
Amount reduces manufacturing cost.
Tartaric acid containing 0.05mM in above-mentioned KH550 solution contains 0.027% L-TARTARIC ACID in tartaric acid.Tartaric acid
Addition can avoid causing stacking and the aggregation of graphene oxide due to the-NH2 reductions of KH550 so that GO lamellas point
It dissipates uniformly, so that graphene oxide has preferable compatibility with polymer, it is final to improve surface modified graphene oxide
Dispersion stabilization in the polymer and uniformity are mainly present in polymeric matrix with the dispersing morphology of monolithic layer or thin layer
In, while tartaric acid can be connected in graphene oxide layer, to provide segment polarity group in graphene oxide layer, from
And binding site is provided for silane coupler modified graphene, it can promote anti-between amino and epoxy between KH550 and GO
It answers, improves the grafting rate of graphene oxide, it is dispersed in the polymer to improve graphene oxide.
Graphene/phenolic resin composite made from a kind of preparation method of graphene/phenolic resin composite.
A kind of purposes of graphene/phenolic resin composite, is preparing automobile brake lining plate, automotive brake pads and clutch
The device piece purposes wiped in material, the ingredient and its weight of friction material are divided into：13 parts of graphene/phenolic resin composite,
2 parts of steel fibre, 10 parts of basalt fibre, 10 parts of aramid fiber, 5 parts of graphite whisker, 1 part of chromite, 10 parts of zinc sulfate, aluminium oxide 1
Part, 25 parts of flyash, 5 parts of barium sulfate.The friction material has stable friction coefficient, low wear rate, preferable heat resistanceheat resistant decline
Property, the feature that heat resistance is strong and mechanical strength is high, compared with traditional friction material, comprehensive performance have it is apparent improvement and
It improves.
Embodiment 2：
Weight ratio is 0.5 by a kind of preparation method of graphene/phenolic resin composite:100 graphene and phenolic resin
Melt blending, melt blending extrusion temperature are 135 DEG C, and filler is added after mixing, is kneaded on open mill, is kneaded
Afterwards by crushing material, under conditions of temperature is 168 DEG C, pressure is 5MPa compression molding prepare composite material, then according to solid
Changing program is：120 DEG C of 2h, 140 DEG C of 2h, 160 DEG C of 2h, 180 DEG C of 2h solidifications are to get surface modified graphene oxide composite material.
The additive amount of curing accelerator is the 0.68% of phenolic resin weight, propene carbonate, two isocyanides in curing accelerator
The molar ratio of acid esters and octadecanoic acid is 1:1.45:0.025.
Graphene is surface modified graphene oxide, and the method for modifying of graphene is：It is 1 by weight:20 will aoxidize stone
Black alkene is added in a concentration of 2% KH550 solution, reacts at 80 DEG C for 24 hours, centrifuges after reaction, and washing, low temperature drying obtains
To surface modified graphene oxide.
Tartaric acid containing 0.04mM in above-mentioned KH550 solution contains 0.03% L-TARTARIC ACID in tartaric acid.
A kind of purposes of graphene/phenolic resin composite, is preparing automobile brake lining plate, automotive brake pads and clutch
The device piece purposes wiped in material, the ingredient and its weight of friction material are divided into：8 parts of graphene/phenolic resin composite, steel
4 parts of fiber, 6 parts of basalt fibre, 12 parts of aramid fiber, 3 parts of graphite whisker, 2 parts of chromite, 6 parts of zinc sulfate, 2 parts of aluminium oxide, powder
20 parts of coal ash, 8 parts of barium sulfate.
The preparation method of friction material is：Each component is added in high-speed mixer by formula ratio and stirs 23min, obtains group
Divide uniform mixed raw material；The material mixed is put into mold, hot-forming, hot pressing under conditions of 152 DEG C, 13MPa
Dwell time 5min in journey；Hot-forming print is to slowly warm up to 180 DEG C, 12h is kept the temperature at 180 DEG C and is heat-treated,
Friction material is obtained after cooling.
The present embodiment friction material is set as test group, carries out frictional behaviour test, the phenolic resin of control group, as a result
It is shown in Table 1.
The frictional behaviour of 1 friction material of table
As shown in Table 1, control group friction material is less than 0.30 in the heating friction coefficient of 100-350 DEG C of range, and test group is rubbed
The friction coefficient for wiping material is higher than control group.
Embodiment 3：
Composite materials property is tested
Impact property is tested：Specimen size is 80mm × 10mm × 4mm, is tested by GB/T 1043.1-2008.
Bending property is tested：Test rate 2mm/min, span 64mm, is tested by GB/T 9341-2008.
Friction and wear behavior：It is tested according to GB 5763-2008, specimen size is 25mm × 25mm × 5mm, sample
At rotating speed 480r/min, pressing force 0.98MPa measure 100,150,200,250,300 DEG C when friction coefficient and abrasion quality
Loss.Wherein, Volume erosion rate V=1.73 × [WId μF],10-7cm3/（N·m）；Fading rate F=[(μF100℃-
μF250℃)/μF100℃] × 100%, recovery rate R=(μR100℃/μF100℃)×100%。
Wear surface pattern：After sample wear surface metal spraying, wear surface is analyzed with scanning electron microscope.
Croop property：Sample size 30mm × 10mm × 3mm, 180 DEG C of temperature, puts into practice 120min.
Test group selects 2 composite material of embodiment（PF/MGO）, control group 1 selects common commercially available PF materials, control group 1 to select
With selection 2 composite material of embodiment（PF/GO）.The impact strength of material, the test result such as table 2 of bending strength and bending modulus
It is shown；Its croop property and the test result of stress relaxation ability are as depicted in figs. 1 and 2；The test result of its frictional behaviour is such as
Shown in Fig. 3 and Fig. 4；The scanning electron microscope diagram of wear surface is as shown in Figure 5.
2 material mechanical performance of table
| Sample | Impact strength（kJ·m-2） | Bending strength（MPa） | Bending modulus（GPa） |
| Test group | 3.68 | 72.53 | 11.20 |
| Control group 1 | 2.53 | 53.06 | 8.84 |
| Control group 2 | 2.96 | 65.37 | 9.24 |
From table 2 it can be seen that after adding GO and MGO, the mechanical property of composite material is improved, wherein PF/MGO composite woods
The raising of the raising of material, wherein PF/MGO composite materials is particularly evident, compares PF/GO, and composite impact intensity improves
24.32%, bending strength improves 10.95%, and bending modulus improves 21.21%.This illustrates that GO is modified by surface and effectively improves
The mechanical properties of PF composite materials.Think, GO contains on surface a large amount of hydrophily oxygen-containing group, is unfavorable for dividing in PF
It dissipates, since the hydroxyls dehydrate on KH550 and GO is condensed, modified GO hydrophilic radicals are reduced, and fine dispersion can be formed in PF,
The interface interaction for improving composite material, to make the mechanical property of material be improved.
It can be seen that from Fig. 1 and Fig. 2 in 180 DEG C, 120min, the deformation ratio of PF/MGO composite materials is 0.12%, point
100% and 40.79% is not reduced than the deformation ratio of pure PF/GO composite materials；From Fig. 4 it can also be seen that PF/MGO composite materials
Relaxation modulus is 1701MPa, improves 154.26% and 42.22% than pure PF and PF/GO composite materials respectively, thus illustrates, GO
Surface be modified and can effectively improve creep and the stress relaxation ability of PF composite materials.
From figure 3, it can be seen that PF/MGO composite materials in the friction coefficient of decline and Restoration stage all than pure PF and PF/GO
Composite material is high；From fig. 4, it can be seen that PF/MGO composite materials have lower wear rate at different temperature, illustrate GO
Modification play the role of improve PF composite material frictional behaviours.Think, modified GO thermal stability improves, in height
It is not easily decomposed under temperature, and disperses in PF more preferable, interface interaction is remarkably reinforced.
From fig. 5, it can be seen that PF/MGO composite materials are without apparent ditch dug with a plow and stick together peeling, illustrate that the modification of GO can have
Effect improves the interface interaction between GO and PF matrixes.Think, GO enhances by modified lipophile, the interface interaction with PF
Enhancing, in friction process, rigid filled to be not easy to fall off from material, wear surface is smooth.
Routine operation in the operating procedure of the present invention is well known to those skilled in the art, herein without repeating.
Technical scheme of the present invention is described in detail in embodiment described above, it should be understood that the above is only
For specific embodiments of the present invention, it is not intended to restrict the invention, all any modifications made in the spirit of the present invention,
Supplement or similar fashion replacement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of graphene/phenolic resin composite, it is characterised in that：Graphene and phenolic resin are passed through
Melt blending, mixing, compression molding cure after preparing composite material up to surface modified graphene oxide composite material, described solid
The change mixture that curing accelerator is propene carbonate, diisocyanate and octadecanoic acid.
2. a kind of preparation method of graphene/phenolic resin composite according to claim 1, it is characterised in that：Institute
The additive amount for stating curing accelerator is the 0.65-0.7% of phenolic resin weight, propene carbonate, diisocyanate in curing accelerator
The molar ratio of ester and octadecanoic acid is 1:1.4-1.5:0.02-0.03.
3. a kind of preparation method of graphene/phenolic resin composite according to claim 1, it is characterised in that：Institute
It is surface modified graphene oxide to state graphene, and the method for modifying of the graphene is：It is 1 by weight:17-22 will aoxidize stone
Black alkene is added in the KH550 solution of a concentration of 1.8-2.3%, and 22-25h is reacted at 75-85 DEG C, is centrifuged after reaction, is washed
It washs, low temperature drying, obtains surface modified graphene oxide.
4. a kind of preparation method of graphene/phenolic resin composite according to claim 1, it is characterised in that：Institute
State the tartaric acid containing 0.03-0.05mM in KH550 solution, the L-TARTARIC ACID containing 0.027-0.032% in the tartaric acid.
5. a kind of preparation method of graphene/phenolic resin composite according to claim 1, it is characterised in that：Institute
The weight ratio for stating graphene and phenolic resin is 0.02-1:100.
6. a kind of preparation method of graphene/phenolic resin composite according to claim 1, it is characterised in that：Institute
It is 130-140 DEG C to state melt blending extrusion temperature.
7. a kind of preparation method of graphene/phenolic resin composite according to claim 1, it is characterised in that：Institute
Stating compression molding temperature is：165-170 DEG C, pressure is：4-6MPa.
8. a kind of preparation method of graphene/phenolic resin composite according to claim 1, it is characterised in that：Institute
Stating program curing is：118-122℃1.5-2.5h、138-142℃1.5-2.5h、158-162℃1.5-2.5h、178-182℃
1.5-2.5h。
9. stone made from a kind of preparation method of graphene/phenolic resin composite described in claim 1-7 any one
Black alkene/phenolic resin composite.
10. a kind of purposes of graphene/phenolic resin composite, it is characterised in that：Preparing automobile brake lining plate, automobile brake
Vehicle piece and the clutch disc purposes wiped in material, the ingredient and its weight of the friction material are divided into：Graphene/phenolic resin
5-13 parts of composite material, 2-6 parts of steel fibre, 3-10 parts of basalt fibre, 10-15 parts of aramid fiber, 1-5 parts of graphite whisker, chromous acid
1-3 parts of salt, 3-10 parts of zinc sulfate, 1-3 parts of aluminium oxide, 15-25 parts of flyash, 5-10 parts of barium sulfate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810293029.1A CN108623988A (en) | 2018-03-30 | 2018-03-30 | A kind of graphene/phenolic resin composite and application thereof |
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| CN201810293029.1A CN108623988A (en) | 2018-03-30 | 2018-03-30 | A kind of graphene/phenolic resin composite and application thereof |
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