CN103980663A - Composite material for juvenile automobile body panel and preparation method thereof - Google Patents
Composite material for juvenile automobile body panel and preparation method thereof Download PDFInfo
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- CN103980663A CN103980663A CN201410138146.2A CN201410138146A CN103980663A CN 103980663 A CN103980663 A CN 103980663A CN 201410138146 A CN201410138146 A CN 201410138146A CN 103980663 A CN103980663 A CN 103980663A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
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- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 48
- 239000004917 carbon fiber Substances 0.000 claims abstract description 48
- 239000003822 epoxy resin Substances 0.000 claims abstract description 21
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims abstract description 21
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
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- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 20
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- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 claims description 4
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 4
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 3
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- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 3
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical compound C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
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Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention relates to a composite material for a juvenile automobile body panel and a preparation method thereof. The composite material is a carbon-fiber composite composed of the following components by weight: 40 to 60 parts of a modified carbon fiber, 30 to 50 parts of an epoxy resin, 5 to 15 parts of elastomer, 3 to 12 parts of nano-hydroxyapatite, 0.2 to 3 parts of a coupling agent, 3 to 8 parts of nanometer SiO2, 5 to 15 parts of a reinforcing filler and 0.5 to 4 parts of a curing agent. The preparation method comprises the following steps: removing a slurry layer and impurities on the surface of a carbon fiber, successively washing, drying and oxidizing the carbon fiber, and after oxidation, carrying out a heating reaction in a solvent in the presence of an acid binding agent, an initiator and grafting monomers so as to modify the carbon fiber; weighing the prepared modified carbon fiber in proportion, carrying out ultrasonic dispersion, adding the epoxy resin and carrying out a reaction for 1 to 3 h; and then adding the rest components, carrying out uniform mixing with stirring, injecting an obtained mixture into a die and carrying out curing molding and demolding so as to prepare the composite material for the juvenile automobile body panel. The prepared composite material has the advantages of low density, good carrying capacity, high security and low cost.
Description
Technical field
The present invention relates to a kind of matrix material and preparation method thereof, relate in particular to a kind of matrix material for juvenile automobile car body panel and preparation method thereof.
Background technology
Juvenile automobile vehicle body is the important component part of juvenile automobile, and it has formed taking space and taking environment of child, and in addition, the appearance of vehicle body has been shown plastic arts and the feature of car load.Therefore, the material of juvenile automobile vehicle body should meet vehicle body design, production, assembling, safeguard the requirement of aspect, also will meet the requirement of the aspects such as use, safety.
At present, juvenile automobile car body panel is mainly made by metallic substance, as steel, magnesium, aluminium and alloy thereof etc., although the car body panel that these metallic substance are made can meet intensity, rigidity, corrosion-resistant, drawing property with etc. aspect requirement, the density of metallic substance is high, the car body panel of making is heavier, and the cost of metallic substance is high, need to carry out metalworking technique, processing charges is high, and the production cycle is long.
Summary of the invention
The object of the invention is for the above-mentioned problems in the prior art, proposed the matrix material for juvenile automobile car body panel that a kind of density is low, bearing capacity is strong, safe, cost is low.
Object of the present invention can realize by following technical proposal: a kind of matrix material for juvenile automobile car body panel, described matrix material is carbon-fibre composite, described carbon-fibre composite is become to be grouped into by following parts by weight: modified carbon fiber: 40-60 part, epoxy resin: 30-50 part, elastomerics: 5-15 part, nanometer hydroxyapatite: 3-12 part, coupling agent: 0.2-3 part, nanometer SiO
2: 3-8 part, reinforcing filler: 5-15 part, solidifying agent: 0.5-4 part.
The present invention is carbon-fibre composite for the matrix material of juvenile automobile car body panel, and the advantage of the juvenile automobile vehicle body maximum of making of carbon-fibre composite is exactly that quality is light, intensity is large.Because carbon fiber is in the situation that weight is only equivalent to the 20-30% of steel weight, hardness but reaches the more than 10 times of steel.So prepare vehicle body plate with carbon-fibre composite, can make automotive light weight technology, than the vehicle weight of common iron, can reduce by 60% left and right, but security but shows no sign of reduction, its physical strength and impact-resistance are high all the better.In addition, the juvenile automobile car body panel of making by plain metal material, if bump when children are at play or hit by hard thing, vehicle body may cave in.But the vehicle body plate made from carbon-fibre composite is but very firm, if bump when children are at play or hit by hard thing, can rapidly rebound in the place bumping or the place of being hit by hard thing, and surface can not damaged at all.
In addition, the present invention has also added epoxy resin and elastomerics in carbon fiber, forms the more excellent carbon-fibre composites of performance such as intensity, corrosion-resistant, antifatigue.Wherein, epoxy resin is a kind of very important thermosetting resin, in the molecular chain of its molecular structure, contain active epoxide group, this makes it can form with the solidifying agent generation crosslinking reaction of number of different types insoluble, the not molten superpolymer with tridimensional network.In addition, the advantage such as resin itself has that mechanical property is high, strong adhesion, cure shrinkage are little, but also there is the outstanding advantages such as good manufacturability, good electrical insulating property, good stability, thermotolerance be good, become one of most widely used matrix in carbon-fibre composite.But undressed carbon fiber surface presents unreactiveness, poor with epoxy resin-base wetting property, thus cause matrix material bad adhesion, had a strong impact on the performance of carbon-fibre composite excellent properties.Therefore, in order to improve the wetting property of carbon fiber and epoxy resin-base, the present invention adopts chemical graft process to carry out modification to carbon fiber surface, and the quadrol with active group or ethylene glycol are carried out to finishing as grafted monomer to carbon fiber surface.
Before carbon fiber is carried out to chemical modification, the present invention analyzes carbon fiber surface constituent content, result shows, the content of inoxidized carbon fiber surface carbon is in 70% left and right, and the content of oxygen element only has 20% left and right, inoxidized carbon fiber surface is mainly graphite-structure, oxygen-containing functional group isopolarity group content is less, be unfavorable for that chemical graft process utilizes the interaction of functional group at carbon fiber surface grafted monomer, so the present invention will be oxidized carbon fiber before carbon fiber is carried out to chemical modification.Carbon fiber of the present invention is after acidic solution oxidation, and the oxygen element relative content of carbon fiber surface has increased by 6% after measured, and carbon has declined 8%, and nitrogen element content changes little.The increase of carbon fiber surface oxygen element content is conducive to the carrying out of graft reaction.The carbon-fibre composite section of processing through peroxidation, graft reaction is more smooth, it is not obvious that fiber is extracted phenomenon, there is no the phenomenon of single fiber pull-out test, illustrate that carbon fiber is after oxidative grafting reaction, the cohesiveness of carbon-fibre composite obviously improves, and has improved the interface performance of carbon fiber and epoxy resin.
The present invention has also added nanometer hydroxyapatite in carbon-fibre composite, and nanometer hydroxyapatite can be combined with epoxy resin-matrix body interface, significantly improves the mechanical property of carbon-fibre composite.And nanometer hydroxyapatite is combined with epoxy resin interface and is directly affected mutually the performance of matrix material, if there is no good interface combination, matrix material easily forms partial relaxation, causes stress concentration, and the strength of materials declines.Therefore, the present invention draws after by kinds of experiments scheme, by adding coupling agent lecithin modification nanometer hydroxyapatite, the surfactivity functional group of nanometer hydroxyapatite is increased, make nanometer hydroxyapatite likely with epoxy resin generation chemical bonds, thereby effectively improve the interfacial bonding property of nanometer hydroxyapatite and epoxy resin, improve the mechanical property of carbon-fibre composite.
In addition, the present invention has also added nanometer SiO in carbon-fibre composite
2, nanometer SiO
2add can enhanced carbon fiber and the bonding strength of epoxy resin, but also be conducive to matrix material, at dual face, form uniform transfer film, thereby the wear-resisting and antifriction performance that improves carbon-fibre composite, its wear rate and rubbing factor are respectively than not adding nanometer SiO
2carbon-fibre composite reduced by 35% and 20% left and right.Therefore, in use no matter there is friction or collision in the juvenile automobile vehicle body of finally making, the damage intensity of vehicle body has all obtained reducing greatly, also greatly reduce the depreciation speed of body of a motor car, both reduce the follow-up maintenance cost of juvenile automobile vehicle body, also extended the working life of juvenile automobile vehicle body.
As preferably, described coupling agent is Yelkin TTS.
As preferably, described reinforcing filler is one or more in chromic oxide, copper powder, aluminum oxide, silicon carbide, boron nitride, glass microballon.Reasonable compatibility based on above-mentioned carbon-fibre composite, then add strongthener with the mechanical property of reinforced article, also can play cost-saving effect.But the reinforcing effect of strongthener depends on and the consistency that is enhanced material, therefore, the composition of the above-mentioned strongthener of the present invention is summed up careful selection out by data after by great many of experiments.
As preferably, described nanometer hydroxyapatite, nanometer SiO
2, reinforcing filler particle diameter be 3-80nm.In carbon-fibre composite, the difference of size can affect the distribution of composition, and particle diameter is less, and the modulus of goods, tensile strength, yield strength and elongation all can increase to some extent.
As preferably, described elastomerics is one or more in natural rubber, epoxy natural rubber, styrene-butadiene rubber(SBR), paracril, chloroprene rubber.Elastomerics has good shock resistance and anti-fatigue performance; the place that adds elastomerics to be conducive to end product juvenile automobile vehicle body in the region bumping in carbon-fibre composite or hit by hard thing can quick rebound, and protection body of a motor car surface can not damaged.
As preferably, described solidifying agent is a kind of in methylethyl ketone peroxide, methyl tetrahydrophthalic anhydride, diaminodiphenylmethane.Solidifying agent is one of carbon-fibre composite necessary raw material of preparing juvenile automobile vehicle body, if there is no solidifying agent, the epoxy resin in carbon-fibre composite is just difficult to solidify.In numerous solidifying agent, in use effect is relatively better for three kinds of selected solidifying agent of the present invention.
Another object of the present invention is to provide the preparation method of above-mentioned a kind of matrix material for juvenile automobile car body panel, and described preparation method comprises the following steps:
S1, carbon fiber is removed to surperficial slurry layer and impurity with acetone extracting 35-45h, then with distilled water wash, be placed on heated oxide 1-4h in acidic solution after dry, then use distilled water wash, standby;
S2, the carbon fiber after above-mentioned oxidation is placed in solvent, reacting by heating 1-5h under acid binding agent, initiator and grafted monomer exist, reaction finishes rear washing, sample preparation obtains modified carbon fiber;
S3, take the ultrasonic dispersion of the above-mentioned modified carbon fiber making of 40-60 part 20-50min, then add 30-50 part epoxy resin to react 1-3h at 60-120 ℃, then add 3-12 part nanometer hydroxyapatite, 0.2-3 part coupling agent, 5-15 part elastomerics, 3-8 part nanometer SiO
2, the reinforcing filler of 5-15 part and 0.5-4 part solidifying agent fully stir;
S4, above-mentioned mixing solutions is injected to mould, at 60-100 ℃, curing molding under 8-15MPa, the demoulding makes the matrix material for juvenile automobile car body panel.
As preferably, acidic solution described in step S1 is a kind of in concentrated nitric acid, the vitriol oil, and Heating temperature is 60-120 ℃.
As preferably, solvent described in step S2 is sulfur oxychloride, and acid binding agent is DMF, and initiator is that DMAP, grafted monomer are a kind of in quadrol or ethylene glycol, and temperature of reaction is 60-100 ℃.
As preferably, the mol ratio of carbon fiber described in step S2 and solvent is 1:(1-8), the mol ratio of acid binding agent, initiator and grafted monomer is (0.5-5): (1-5): 1.
Compared with prior art, the present invention has following advantage:
1. the present invention is carbon-fibre composite for the matrix material of juvenile automobile car body panel, carbon fiber quality is equivalent to the 20-30% of steel weight, but hardness but reaches the more than 10 times of steel, so the juvenile automobile vehicle body made from carbon-fibre composite can make automotive light weight technology, body of a motor car weight than common iron can reduce by 60% left and right, but security but shows no sign of reduction, its physical strength and impact-resistance are high all the better.
2. the present invention is for the matrix material of juvenile automobile car body panel, and carbon fiber carries out surface treatment through peroxidation and chemical graft, make carbon fiber can be better and epoxy resin combine, the mechanical property of raising carbon-fibre composite.
3. the present invention has also added the nanometer hydroxyapatite through coupling agent lecithin modification for the matrix material of juvenile automobile car body panel, make nanometer hydroxyapatite likely with epoxy resin generation chemical bonds, thereby effectively improve the interfacial bonding property of nanometer hydroxyapatite and epoxy resin, improve the mechanical property of carbon-fibre composite.
4. the present invention, for the matrix material of juvenile automobile car body panel, has also added nanometer SiO
2, elastomerics, reinforcing filler and solidifying agent, well combine with other material, effectively improved the mechanical property of carbon-fibre composite, thereby make the performance such as wear-resistant, shock strength of the juvenile automobile car body panel made by carbon-fibre composite obtain larger improvement, reduce the follow-up upkeep cost of juvenile automobile car body panel, and extended the work-ing life of juvenile automobile car body panel.
Embodiment
Be below specific embodiments of the invention, technical scheme of the present invention is further described, but the present invention is not limited to these embodiment.
Table 1: embodiment of the present invention 1-4 is for the matrix material of juvenile automobile car body panel
Moiety and parts by weight thereof
Embodiment 1:
First, carbon fiber is removed to surperficial slurry layer and impurity with acetone extracting 35h, then with distilled water wash, be placed in concentrated nitric acid after dry and be heated to 80 ℃ of oxidation 2h, then use distilled water wash.Then the carbon fiber after oxidation is placed in sulfur oxychloride, under acid binding agent DMF, initiator DMAP and the existence of grafted monomer quadrol, is heated to 80 ℃ of reaction 3h; Wherein, the mol ratio of carbon fiber and sulfur oxychloride is 1:4, and the mol ratio of acid binding agent DMF, initiator DMAP and grafted monomer quadrol is 2:3:1.Reaction finishes rear washing, sample preparation obtains modified carbon fiber.
Take 40 parts of modified carbon fibers that make through ultrasonic dispersion 30min, then add 30 parts of epoxy resin to react 2h at 80 ℃, then add the nanometer SiO of the nanometer hydroxyapatite of 3 parts of 3-20nm, 0.5 part of Yelkin TTS coupling agent, 8 parts of natural rubber elastomer, 3 parts of 3-20nm
2, 8 parts of 3-20nm chromic oxide reinforcing filler and 2 parts of methylethyl ketone peroxide solidifying agent fully stir.After stirring, mixing solutions is injected to mould, at 80 ℃, curing molding under 10MPa, the demoulding makes the finished product for the matrix material of juvenile automobile car body panel.
Embodiment 2:
First, carbon fiber is removed to surperficial slurry layer and impurity with acetone extracting 40h, then with distilled water wash, be placed in the vitriol oil after dry and be heated to 80 ℃ of oxidation 2h, then use distilled water wash.Then the carbon fiber after oxidation is placed in sulfur oxychloride, under acid binding agent DMF, initiator DMAP and the existence of grafted monomer ethylene glycol, is heated to 80 ℃ of reaction 3h; Wherein, the mol ratio of carbon fiber and sulfur oxychloride is 1:4, and the mol ratio of acid binding agent DMF, initiator DMAP and grafted monomer ethylene glycol is 2:3:1.Reaction finishes rear washing, sample preparation obtains modified carbon fiber.
Take 46 parts of modified carbon fibers that make through ultrasonic dispersion 30min, then add 36 parts of epoxy resin to react 2h at 80 ℃, then add the elastomerics that the nanometer hydroxyapatite of 6 parts of 20-40nm, 1 part of Yelkin TTS coupling agent, 4 parts of epoxy natural rubbers and 4 parts of chloroprene rubbers form, the nanometer SiO of 5 parts of 20-40nm
2, 4 parts of aluminum oxide of 20-40nm and the boron nitride of 4 parts of 20-40nm reinforcing filler and the 2 parts of methyl tetrahydrophthalic anhydride solidifying agent that form fully stir.After stirring, mixing solutions is injected to mould, at 80 ℃, curing molding under 10MPa, the demoulding makes the finished product for the matrix material of juvenile automobile car body panel.
Embodiment 3:
First, carbon fiber is removed to surperficial slurry layer and impurity with acetone extracting 40h, then with distilled water wash, be placed in concentrated nitric acid after dry and be heated to 90 ℃ of oxidation 3h, then use distilled water wash.Then the carbon fiber after oxidation is placed in sulfur oxychloride, under acid binding agent DMF, initiator DMAP and the existence of grafted monomer quadrol, is heated to 100 ℃ of reaction 4h; Wherein, the mol ratio of carbon fiber and sulfur oxychloride is 1:6, and the mol ratio of acid binding agent DMF, initiator DMAP and grafted monomer quadrol is 3:2:1.Reaction finishes rear washing, sample preparation obtains modified carbon fiber.
Take 55 parts of modified carbon fibers that make through ultrasonic dispersion 40min, then add 45 parts of epoxy resin to react 3h at 100 ℃, then add the nanometer SiO of the nanometer hydroxyapatite of 9 parts of 40-60nm, 2 parts of Yelkin TTS coupling agents, 10 parts of styrene-butadiene rubber(SBR) elastomericss, 6 parts of 40-60nm
2, 8 parts of 40-60nm glass microballon reinforcing filler and 3 parts of methylethyl ketone peroxide solidifying agent fully stir.After stirring, mixing solutions is injected to mould, at 90 ℃, curing molding under 12MPa, the demoulding makes the finished product for the matrix material of juvenile automobile car body panel.
Embodiment 4:
First, carbon fiber is removed to surperficial slurry layer and impurity with acetone extracting 45h, then with distilled water wash, be placed in concentrated nitric acid after dry and be heated to 120 ℃ of oxidation 4h, then use distilled water wash.Then the carbon fiber after oxidation is placed in sulfur oxychloride, under acid binding agent DMF, initiator DMAP and the existence of grafted monomer quadrol, is heated to 100 ℃ of reaction 5h; Wherein, the mol ratio of carbon fiber and sulfur oxychloride is 1:8, and the mol ratio of acid binding agent DMF, initiator DMAP and grafted monomer quadrol is 5:5:1.Reaction finishes rear washing, sample preparation obtains modified carbon fiber.
Take 60 parts of modified carbon fibers that make through ultrasonic dispersion 50min, then add 50 parts of epoxy resin to react 3h at 120 ℃, then add the elastomerics that the nanometer hydroxyapatite of 12 parts of 60-80nm, 3 parts of Yelkin TTS coupling agents, 5 parts of paracrils and 5 parts of chloroprene rubbers form, the nanometer SiO of 8 parts of 60-80nm
2, the copper powder of 5 parts of 60-80nm and reinforcing filler and the 2 parts of diaminodiphenylmethane solidifying agent that 5 parts of 60-80nm silicon carbide forms fully stir.After stirring, mixing solutions is injected to mould, at 100 ℃, curing molding under 15MPa, the demoulding makes the finished product for the matrix material of juvenile automobile car body panel.
The matrix material for juvenile automobile car body panel that embodiment of the present invention 1-4 is made carries out performance test, and test result is as shown in table 2.
Table 2: embodiment of the present invention 1-4 make for juvenile automobile car body panel
The performance test results of matrix material
As can be seen from Table 2, the composite density for juvenile automobile car body panel that embodiment of the present invention 1-4 makes is greatly about 1.5-1.6g/cm
3between, the car body panel quality making with matrix material of the present invention will alleviate many, but the bus body strength height that the present invention makes for the strength ratio steel of the matrix material of juvenile automobile car body panel more than 10 times, the vehicle body that safety performance is made than steel is better.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although the present invention has been made a detailed description and has quoted as proof some specific embodiments, to those skilled in the art, only otherwise it is obvious leaving that the spirit and scope of the present invention can make various changes or revise.
Claims (10)
1. the matrix material for juvenile automobile car body panel, it is characterized in that, described matrix material is carbon-fibre composite, described carbon-fibre composite is become to be grouped into by following parts by weight: modified carbon fiber: 40-60 part, epoxy resin: 30-50 part, elastomerics: 5-15 part, nanometer hydroxyapatite: 3-12 part, coupling agent: 0.2-3 part, nanometer SiO
2: 3-8 part, reinforcing filler: 5-15 part, solidifying agent: 0.5-4 part.
2. a kind of matrix material for juvenile automobile car body panel according to claim 1, is characterized in that, described coupling agent is Yelkin TTS.
3. a kind of matrix material for juvenile automobile car body panel according to claim 1, is characterized in that, described reinforcing filler is one or more in chromic oxide, copper powder, aluminum oxide, silicon carbide, boron nitride, glass microballon.
4. according to a kind of matrix material for juvenile automobile car body panel described in claim 1-3, it is characterized in that described nanometer hydroxyapatite, nanometer SiO
2, reinforcing filler particle diameter be 3-80nm.
5. a kind of matrix material for juvenile automobile car body panel according to claim 1, is characterized in that, described elastomerics is one or more in natural rubber, epoxy natural rubber, styrene-butadiene rubber(SBR), paracril, chloroprene rubber.
6. a kind of matrix material for juvenile automobile car body panel according to claim 1, is characterized in that, described solidifying agent is a kind of in methylethyl ketone peroxide, methyl tetrahydrophthalic anhydride, diaminodiphenylmethane.
7. for a preparation method for the matrix material of juvenile automobile car body panel, it is characterized in that, described preparation method comprises the following steps:
S1, carbon fiber is removed to surperficial slurry layer and impurity with acetone extracting 35-45h, then with distilled water wash, be placed on heated oxide 1-4h in acidic solution after dry, then use distilled water wash, standby;
S2, the carbon fiber after above-mentioned oxidation is placed in solvent, reacting by heating 1-5h under acid binding agent, initiator and grafted monomer exist, reaction finishes rear washing, sample preparation obtains modified carbon fiber;
S3, take the ultrasonic dispersion of the above-mentioned modified carbon fiber making of 40-60 part 20-50min, then add 30-50 part epoxy resin to react 1-3h at 60-120 ℃, then add 3-12 part nanometer hydroxyapatite, 0.2-3 part coupling agent, 5-15 part elastomerics, 3-8 part nanometer SiO
2, the reinforcing filler of 5-15 part and 0.5-4 part solidifying agent fully stir;
S4, above-mentioned mixing solutions is injected to mould, at 60-100 ℃, curing molding under 8-15MPa, the demoulding makes the matrix material for juvenile automobile car body panel.
8. the preparation method of a kind of matrix material for juvenile automobile car body panel according to claim 7, is characterized in that, acidic solution described in step S1 is a kind of in concentrated nitric acid, the vitriol oil, and Heating temperature is 60-120 ℃.
9. the preparation method of a kind of matrix material for juvenile automobile car body panel according to claim 7, it is characterized in that, solvent described in step S2 is sulfur oxychloride, acid binding agent is DMF, initiator is that DMAP, grafted monomer are a kind of in quadrol or ethylene glycol, and temperature of reaction is 60-100 ℃.
10. according to the preparation method of a kind of matrix material for juvenile automobile car body panel described in claim 7 or 9, it is characterized in that, the mol ratio of carbon fiber described in step S2 and solvent is 1:(1-8), the mol ratio of acid binding agent, initiator and grafted monomer is (0.5-5): (1-5): 1.
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