CN105086376B - A kind of carbon fiber/epoxy resin composite material and preparation method thereof - Google Patents
A kind of carbon fiber/epoxy resin composite material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of carbon fiber/epoxy resin composite material and preparation method thereof, belong to field of compound material.The composite is prepared by the way that epoxy resin-base material is infiltrated into carbon fibre fabric, and after being solidified, and wherein epoxy resin-base material includes the component of following parts by weight：100 parts of epoxy resin, 10 30 parts of fluid silicone rubber, 10 35 parts of epoxy resin diluent, 20 35 parts of epoxy curing agent.Compatibility is good between carbon fiber/epoxy resin composite material each component provided in an embodiment of the present invention, and mechanical property is good, and impact flexibility is up to 205kJ/m2, at least 43% is improved than common carbon fibers/epoxy resin composite material.
Description
Technical field
The present invention relates to field of compound material, more particularly to a kind of carbon fiber/epoxy resin composite material and its preparation side
Method.
Background technology
Carbon fiber/epoxy resin composite material is that a class is compound using epoxy resin as matrix, by reinforcement of carbon fiber
Material, with the superior function such as high specific strength, high ratio modulus, high temperature resistant, corrosion-resistant, antifatigue, is widely used in space flight, vapour
The fields such as car, electronics, sports goods and medicine equipment.However, due to after epoxy resin cure matter it is crisp, impact flexibility, bending resistance
Intensity difference, when its load or because defect produce micro-crack when easily spread rapidly make the carbon fiber/epoxy resin composite wood
Material failure.It is therefore desirable to carry out toughness reinforcing processing to it to improve its impact flexibility.Therefore, it is necessary to provide a kind of carbon fiber/ring
Epoxy resin composite material and preparation method.
Prior art generally uses artificial rubber, and toughness reinforcing processing is carried out to carbon fiber/epoxy resin composite material, including：
Artificial rubber is configured to solution, solvent is removed after being well mixed with epoxy resin, curing agent, accelerator, is prepared into asphalt mixtures modified by epoxy resin
Adipose membrane, then melt impregnation is carried out with carbon fiber, final curing obtains carbon fiber/epoxy resin composite material.
Inventor has found that prior art at least has problems with：
The artificial rubber that prior art is provided is poor with epoxy resin compatibility, easily causes carbon fiber/epoxy resin composite wood
The mechanical properties decrease of material.
The content of the invention
Embodiment of the present invention technical problem to be solved is that there is provided compatibility between a kind of good toughness, each component is good
Carbon fiber/epoxy resin composite material and preparation method.Concrete technical scheme is as follows：
On the one hand, the embodiments of the invention provide a kind of carbon fiber/epoxy resin composite material, by by epoxy resin-matrix
Body material is infiltrated into carbon fibre fabric, and is prepared after being solidified, wherein, the epoxy resin-base material include with
The component of lower parts by weight：100 parts of epoxy resin, 10-30 parts of fluid silicone rubber, 10-35 parts of epoxy resin diluent, epoxy resin
20-35 parts of curing agent.
Specifically, preferably, the epoxy resin is selected from bisphenol A type epoxy resin, bisphenol f type epoxy resin, bisphenol S
Any one in type epoxy resin.
Specifically, preferably, the viscosity of the epoxy resin is 2200-5500mPas；The fluid silicone rubber
Viscosity is 1500-3500mPas.
Specifically, preferably, the epoxy resin diluent shrinks selected from butyl glycidyl ether, BDO two
Any one in glycerin ether, phenyl glycidyl ether, polypropylene glycol diglycidyl ether.
Specifically, preferably, the fluid silicone rubber is selected from terminal hydroxy group liquid nitrile rubber, end carboxyl liquid butyronitrile rubber
Any one in glue, end carboxyl liquid polybutadiene, terminal hydroxy group liquid polybutadiene.
Specifically, preferably, the epoxy curing agent is selected from diethylenetriamine, triethylene tetramine, isophthalic diformazan
Any one in amine.
Specifically, preferably, the carbon fibre fabric is twill carbon cloth.
On the other hand, the embodiments of the invention provide a kind of preparation method of above-mentioned carbon fiber/epoxy resin composite material,
Including：Epoxy resin, fluid silicone rubber, epoxy resin diluent are mixed and stirred for uniformly, then to add epoxy resin cure
Agent continues to stir, and obtains epoxy resin-base material；
The epoxy resin-base material is infiltrated into carbon fibre fabric by vacuum bag pressure method, then solidified,
Obtain carbon fiber/epoxy resin composite material.
Specifically, preferably, controlling the epoxy resin, the fluid silicone rubber, the epoxy resin diluent to mix
Viscosity after conjunction is 720-760mPas.
Specifically, preferably, the solidification includes：It is 75-85 DEG C, 115-125 DEG C, 145- to control solidification temperature successively
155 DEG C, accordingly, control solidification time is 0.8-1.2h, 1.8-2.2h, 1.8-2.2h successively.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Carbon fiber/epoxy resin composite material provided in an embodiment of the present invention, by adding into epoxy resin-base material
Plus fluid silicone rubber, as toughener, its viscosity is low, good with epoxy resin compatibility, beneficial to forming homogeneous mixed system.
Under the complex role of above-mentioned each component, the mechanical property of prepared carbon fiber/epoxy resin composite material is significantly improved,
Especially its impact flexibility is up to 205kJ/m2, at least 43% is improved than common carbon fibers/epoxy resin composite material.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, embodiment of the present invention will be made below into
One step it is described in detail.
On the one hand, the embodiments of the invention provide a kind of carbon fiber/epoxy resin composite material, by by epoxy resin-matrix
Body material is infiltrated into carbon fibre fabric, and is prepared after being solidified, wherein, epoxy resin-base material includes following heavy
Measure the component of part：100 parts of epoxy resin, 10-30 parts of fluid silicone rubber, 10-35 parts of epoxy resin diluent, epoxy resin cure
20-35 parts of agent.
Carbon fiber/epoxy resin composite material provided in an embodiment of the present invention, by adding into epoxy resin-base material
Plus fluid silicone rubber, as toughener, its viscosity is low, good with epoxy resin compatibility, beneficial to forming homogeneous mixed system.
Under the complex role of above-mentioned each component, the mechanical property of prepared carbon fiber/epoxy resin composite material is significantly improved,
Especially its impact flexibility is up to 205kJ/m2, at least 43% is improved than common carbon fibers/epoxy resin composite material.
Wherein, epoxy resin is in bisphenol A type epoxy resin, bisphenol f type epoxy resin, bisphenol-s epoxy resin
Any one.It is preferred that bisphenol A type epoxy resin (i.e. bisphenol A diglycidyl ether), to improve prepared carbon fiber/asphalt mixtures modified by epoxy resin
The transparency and mechanical property of resin composite material.
Carbon fiber/epoxy resin composite material described in the embodiment of the present invention, refer to by matrix of epoxy resin, carbon it is fine
Tie up the composite for reinforcement.The tridimensional network formed after cross linking of epoxy resin solidification has the characteristics of matter is crisp, when
It loads or easily being spread rapidly when defect produces micro-crack and the carbon fiber/epoxy resin composite material is failed.And
Carbon fiber has the excellent properties such as density is low, modulus is high, intensity is high, high temperature resistant, and epoxy resin-base material is infiltrated into fine to carbon
In dimensional fabric, obtained carbon fiber/epoxy resin composite material has the advantage of epoxy resin and carbon fiber concurrently, but its toughness is simultaneously
Do not improved.Therefore, in the case where not influenceing other mechanical properties of carbon fiber/epoxy resin composite material, in order to drop
Its low fragility, increases its toughness, so as to improve its bearing strength, the embodiment of the present invention is made by adding fluid silicone rubber thereto
Toughness reinforcing processing is carried out to it for toughener.
The embodiment of the present invention is using fluid silicone rubber as toughener, and its viscosity is low, has good phase with epoxy resin
Capacitive, so as to form homogeneous mixed system, other mechanical property without reducing carbon fiber/epoxy resin composite material
Energy.Specifically, the viscosity of epoxy resin is 2200-5500mPas, and the viscosity of fluid silicone rubber is 1500-3500mPas.
For example, fluid silicone rubber is selected from terminal hydroxy group liquid nitrile rubber, end carboxyl liquid nitrile rubber, end carboxyl liquid polybutadiene
Any one in alkene, terminal hydroxy group liquid polybutadiene.Epoxy resin is carried out by using the fluid silicone rubber of the above-mentioned type
It is modified, the toughness of prepared carbon fiber/epoxy resin composite material can be effectively improved.
During carbon fiber/epoxy resin composite material is prepared, the embodiment of the present invention is dilute by adding epoxy resin
Agent is released, the viscosity of epoxy resin-base material is reduced to 720-760mPas, so as to increase epoxy resin and fluid silicone rubber
Mobility, make reaction between the two more abundant.Preferably, epoxy resin diluent be selected from butyl glycidyl ether,
Any one in 1,4- butanediol diglycidyl ethers, phenyl glycidyl ether, polypropylene glycol diglycidyl ether.It is
Response type epoxy resin diluent, i.e. reactive epoxies diluent, due to containing epoxide group in its strand, can with it is each
Plant epoxy curing agent and carry out cross-linking reaction, form network structure.Wherein, ring is contained in one end of butyl glycidyl ether molecule
Oxygen groups, its dilution effect is best；Epoxide group is contained at the two ends of BDDE molecule, its pliability
Preferably；Epoxide group is contained in one end of phenyl glycidyl ether molecule, and its heatproof is preferable；Polypropylene glycol diglycidyl ether molecule
Two ends contain epoxide group, its pliability is preferable.
Specifically, epoxy curing agent is any one in diethylenetriamine, triethylene tetramine, m-xylene diamine
Kind.It is amine curing agent, in cured condition, and epoxide group is opened by active hydrogen on its nitrogen-atoms, and be allowed to
Epoxy resin crosslinks reaction, forms netted space polymers, the epoxy resin of line style is changed into tough and tensile build solid.
Preferably, carbon fibre fabric provided in an embodiment of the present invention can be plain weave, twill, satin weave, unidirectional carbon
Cloth, preferably twill carbon cloth, it has stronger shearing force, so that tensile capacity is stronger.Carbon cloth is a kind of Unidirectional
Fiber reinforced product, itself has good tensile strength, and it, which is impregnated, by epoxy resin-base material can reach and make ring
Oxygen tree fat tension, shearing resistance, the effect of seismic hardening.Further, carbon fibre fabric provided in an embodiment of the present invention can be used
1K, 3K, 6K, 12K, 24K and the above specification, it is to be understood that 1K, which is represented, has 1000 monofilament carbon fine in a branch of carbon fiber
Dimension, the like.The carbon fibre fabric that the embodiment of the present invention is used is preferably 3K twill carbon cloths, and it has intensity height, ring
The good advantage of epoxy resin-based body material effect of impregnation.
On the other hand, the embodiments of the invention provide a kind of preparation method of above-mentioned carbon fiber/epoxy resin composite material,
Including：Epoxy resin, fluid silicone rubber, epoxy resin diluent are mixed and stirred for uniformly, then to add epoxy resin cure
Agent continues after stirring, and obtains epoxy resin-base material；By vacuum bag pressure method by epoxy resin-base material infiltrate to
In carbon fibre fabric, then solidified, obtained carbon fiber/epoxy resin composite material.
Preferably, the embodiments of the invention provide a kind of system of more specifically carbon fiber/epoxy resin composite material
Preparation Method, including：
1) epoxy resin, fluid silicone rubber, epoxy resin diluent, are mixed and stirred for 1-3h, preferably 2h, treat that it is formed
After homogeneous mixed system, add epoxy curing agent and continue the 1-3h that stirs, preferably 2h, form epoxy resin-base material
Material.
2), carbon fibre fabric is trimmed, laying and sizing, cover release cloth, flow-guiding screen, auxiliary on its surface successively
Mozzle, vacuum bag, are sealed with fluid sealant, and vacuum pumping is carried out to vacuum bag, to the close -0.1Mpa of internal pressure.
3) epoxy resin-base material, is injected by auxiliary draft tube, its consumption is 1L epoxy resin-bases material/often put down
Square rice carbon fibre fabric, to realize its complete wetting to carbon fibre fabric, after infiltration 4-8h, obtain uncured carbon fiber/
Epoxy resin composite material.
4), uncured carbon fiber/epoxy resin composite material is solidified, it is 75-85 that solidification temperature is controlled successively
DEG C, 115-125 DEG C, 145-155 DEG C, preferably 80 DEG C, 120 DEG C, 150 DEG C, accordingly, successively control solidification time be 0.8-
1.2h, 1.8-2.2h, 1.8-2.2h, preferably 1h, 2h, 2h, carry out demoulding processing, obtain carbon fiber/epoxy resin composite wood
Material.
The vacuum bag pressure method that the embodiment of the present invention is used is state of the art, and it has the throwing for saving mould and equipment
The advantage of money.Wherein, release cloth is used to aid in the separation of carbon fiber/epoxy resin composite material, so as to get product quality more
It is good.Flow-guiding screen is easy to passing through for epoxy resin-base material due to its stereochemical structure, to realize to the more preferable leaching of carbon fibre fabric
Profit.Fluid sealant is used between mould and vacuum bag, vacuum bag is reached the effect being fully sealed.
Further, method provided in an embodiment of the present invention also includes：The carbon fiber/epoxy resin prepared is combined
Material is trimmed, polished and excision forming, in order to obtain the composite of intended shape.
The present invention will be further described through by specific embodiment below.
In specific examples below, the unreceipted condition person of involved operation, according to normal condition or manufacturer
It is recommended that condition carry out.Raw materials used unreceipted production firm and specification person are can be by the conventional products of acquisition purchased in market.
Part material information involved by following examples is as follows：
Bisphenol A type epoxy resin, model SM609 (E-03), purchased from Sanmu Group Co., Ltd., Jiangsu；
Bisphenol f type epoxy resin, model EPCN-170, purchased from Hunan Tuo Suo Science and Technology Ltd.s；
Bisphenol-s epoxy resin, purchased from Chongqing Yong Hua Chemical Groups Co., Ltd；
3K twill carbon cloths, purchased from Dalian Xingke Carbon Fiber Co., Ltd.
In addition, according to prepared by being determined " GBT1451-2005 fibre reinforced plastics freely-supported beam type impact ductility tests method "
Carbon fiber/epoxy resin composite material impact flexibility.
Embodiment 1
A kind of carbon fiber/epoxy resin composite material, including 3K twill carbon cloths are present embodiments provided, and is full of
The epoxy resin-base material in the space of 3K twill carbon cloths.Wherein, epoxy resin-base material includes following parts by weight
Component：100 parts of bisphenol-s epoxy resin, its viscosity is 4210mPas；14 parts of terminal hydroxy group liquid nitrile rubber, its viscosity is
2300mPa·s；25 parts of butyl glycidyl ether；20 parts of diethylenetriamine.
The preparation method of the composite is as follows：
1), above-mentioned bisphenol-s epoxy resin, terminal hydroxy group liquid nitrile rubber, butyl glycidyl ether are mixed and stirred for
2h, after homogeneous mixed system is formed after it, adds diethylenetriamine and continues to stir 2h, form epoxy resin-base material.
2), 3K twill carbon cloths are trimmed, laying and sizing, covered successively on its surface release cloth, flow-guiding screen,
Auxiliary draft tube, vacuum bag, are sealed with fluid sealant, to vacuum bag carry out vacuum pumping, to internal pressure close to-
0.1Mpa。
3) epoxy resin-base material, is injected by auxiliary draft tube, its consumption is 1L epoxy resin-bases material/often put down
Square rice carbon fibre fabric, to realize after its complete wetting to 3K twill carbon cloths, infiltration 4h, obtains uncured carbon fine
Dimension/epoxy resin composite material.
4), uncured carbon fiber/epoxy resin composite material is solidified, control successively solidification temperature for 75 DEG C,
115 DEG C, 145 DEG C, accordingly, control solidification time is 1.2h, 2.2h, 2.2h successively.Then the demoulding handle, obtain carbon fiber/
Epoxy resin composite material.
Embodiment 2
A kind of carbon fiber/epoxy resin composite material, including 3K twill carbon cloths are present embodiments provided, and is full of
The epoxy resin-base material in the space of 3K twill carbon cloths.Wherein, epoxy resin-base material includes following parts by weight
Component：100 parts of bisphenol A type epoxy resin, its viscosity is 5400mPas；20 parts of terminal hydroxy group liquid polybutadiene, its viscosity is
1800mPa·s；35 parts of polypropylene glycol diglycidyl ether；24 parts of m-xylene diamine.
The preparation method of the composite is as follows：
1), above-mentioned bisphenol A type epoxy resin, terminal hydroxy group liquid polybutadiene, polypropylene glycol diglycidyl ether are mixed
And 2h is stirred, after homogeneous mixed system is formed after it, add m-xylene diamine and continue to stir 2h, form epoxy resin-base material
Material.
2), 3K twill carbon cloths are trimmed, laying and sizing, covered successively on its surface release cloth, flow-guiding screen,
Auxiliary draft tube, vacuum bag, are sealed with fluid sealant, to vacuum bag carry out vacuum pumping, to internal pressure close to-
0.1Mpa。
3) epoxy resin-base material, is injected by auxiliary draft tube, its consumption is 1L epoxy resin-bases material/often put down
Square rice carbon fibre fabric, to realize after its complete wetting to 3K twill carbon cloths, infiltration 5h, obtains uncured carbon fine
Dimension/epoxy resin composite material.
4), uncured carbon fiber/epoxy resin composite material is solidified, control successively solidification temperature for 78 DEG C,
118 DEG C, 148 DEG C, accordingly, control solidification time is 1.1h, 2.1h, 2.1h successively.Then the demoulding handle, obtain carbon fiber/
Epoxy resin composite material.
Embodiment 3
A kind of carbon fiber/epoxy resin composite material, including 3K twill carbon cloths are present embodiments provided, and is full of
The epoxy resin-base material in the space of 3K twill carbon cloths.Wherein, epoxy resin-base material includes following parts by weight
Component：100 parts of bisphenol f type epoxy resin, its viscosity is 2400mPas；15 parts of end carboxyl liquid nitrile rubber, its viscosity is
2600mPa·s；12 parts of 1,4- butanediol diglycidyl ethers；28 parts of triethylene tetramine.
The preparation method of the composite is as follows：
1), above-mentioned bisphenol f type epoxy resin, end carboxyl liquid nitrile rubber, 1,4- butanediol diglycidyl ethers are mixed
Merge stirring 2h, after homogeneous mixed system is formed after it, add triethylene tetramine and continue to stir 2h, form epoxy resin-base
Material.
2), 3K twill carbon cloths are trimmed, laying and sizing, covered successively on its surface release cloth, flow-guiding screen,
Auxiliary draft tube, vacuum bag, are sealed with fluid sealant, to vacuum bag carry out vacuum pumping, to internal pressure close to-
0.1Mpa。
3) epoxy resin-base material, is injected by auxiliary draft tube, its consumption is 1L epoxy resin-bases material/often put down
Square rice carbon fibre fabric, to realize after its complete wetting to 3K twill carbon cloths, infiltration 6h, obtains uncured carbon fine
Dimension/epoxy resin composite material.
4), uncured carbon fiber/epoxy resin composite material is solidified, control successively solidification temperature for 85 DEG C,
125 DEG C, 150 DEG C, accordingly, control solidification time is 0.8h, 1.8h, 1.8h successively.Then the demoulding handle, obtain carbon fiber/
Epoxy resin composite material.
Embodiment 4
A kind of carbon fiber/epoxy resin composite material, including 3K twill carbon cloths are present embodiments provided, and is full of
The epoxy resin-base material in the space of 3K twill carbon cloths.Wherein, epoxy resin-base material includes following parts by weight
Component：100 parts of bisphenol A type epoxy resin, its viscosity is 5400mPas；25 parts of end carboxyl liquid polybutadiene, its viscosity is
2100mPa·s；35 parts of phenyl glycidyl ether；20 parts of m-xylene diamine.
The preparation method of the composite is as follows：
1), above-mentioned bisphenol A type epoxy resin, end carboxyl liquid polybutadiene, phenyl glycidyl ether are mixed and stirred for
2h, after homogeneous mixed system is formed after it, adds m-xylene diamine and continues to stir 2h, form epoxy resin-base material.
2), 3K twill carbon cloths are trimmed, laying and sizing, covered successively on its surface release cloth, flow-guiding screen,
Auxiliary draft tube, vacuum bag, are sealed with fluid sealant, to vacuum bag carry out vacuum pumping, to internal pressure close to-
0.1Mpa。
3) epoxy resin-base material, is injected by auxiliary draft tube, its consumption is 1L epoxy resin-bases material/often put down
Square rice carbon fibre fabric, to realize after its complete wetting to 3K twill carbon cloths, infiltration 8h, obtains uncured carbon fine
Dimension/epoxy resin composite material.
4), uncured carbon fiber/epoxy resin composite material is solidified, control successively solidification temperature for 80 DEG C,
120 DEG C, 150 DEG C, accordingly, control solidification time is 1h, 2h, 2h successively.Then the demoulding is handled, and obtains carbon fiber/asphalt mixtures modified by epoxy resin
Resin composite material.
Comparative example 1
A kind of carbon fiber/epoxy resin composite material used and compared is present embodiments provided, except not containing end wherein
Hydroxyl liquid nitrile rubber, it is remaining composition, same as Example 1 with when preparation method.
Comparative example 2
A kind of carbon fiber/epoxy resin composite material used and compared is present embodiments provided, except not containing end wherein
Hydroxyl liquid polybutadiene, it is remaining composition, same as Example 2 with when preparation method.
Comparative example 3
A kind of carbon fiber/epoxy resin composite material used and compared is present embodiments provided, except not containing end wherein
Carboxyl liquid nitrile rubber, it is remaining composition, same as Example 3 with when preparation method.
Comparative example 4
A kind of carbon fiber/epoxy resin composite material used and compared is present embodiments provided, except not containing end wherein
Carboxyl liquid polybutadiene, it is remaining composition, same as Example 4 with when preparation method.
Embodiment 5
The present embodiment is to the carbon fiber/epoxy resin composite material that is prepared in embodiment 1-4 and comparative example 1-4
Impact flexibility is tested, as a result as shown in table 1：
Table 1
| Embodiment | Impact flexibility (KJ/m2) |
| Embodiment 1 | 189.2 |
| Comparative example 1 | 132.0 |
| Embodiment 2 | 166.8 |
| Comparative example 2 | 116.8 |
| Embodiment 3 | 174.5 |
| Comparative example 3 | 122.0 |
| Embodiment 4 | 205.4 |
| Comparative example 4 | 137.8 |
Presently preferred embodiments of the present invention is the foregoing is only, the protection domain being not intended to limit the invention is all in this hair
Within bright spirit and principle, any modifications, equivalent substitutions and improvements made etc. should be included in protection scope of the present invention
Within.
Claims (4)
1. a kind of carbon fiber/epoxy resin composite material, by the way that epoxy resin-base material is infiltrated into carbon fibre fabric, and
Prepared after being solidified, it is characterised in that the epoxy resin-base material includes the component of following parts by weight：Bisphenol-A
100 parts of type epoxy resin, 25 parts of end carboxyl liquid polybutadiene, 35 parts of epoxy resin diluent, 20 parts of epoxy curing agent；
The viscosity of the epoxy resin is 5400mPas；The viscosity of the end carboxyl liquid polybutadiene is 2100Pas；
The epoxy resin diluent is phenyl glycidyl ether；The epoxy curing agent is m-xylene diamine；
The carbon fibre fabric is twill carbon cloth.
2. the preparation method of the carbon fiber/epoxy resin composite material described in claim 1, including：By epoxy resin, end carboxyl
Liquid polybutadiene, epoxy resin diluent are mixed and stirred for uniformly, are then added epoxy curing agent and are continued to stir,
Obtain epoxy resin-base material；
The epoxy resin-base material is infiltrated into carbon fibre fabric by vacuum bag pressure method, is then solidified, obtained
Carbon fiber/epoxy resin composite material.
3. method according to claim 2, it is characterised in that the control epoxy resin, the poly- fourth of end carboxyl liquid
Diene, the mixed viscosity of the epoxy resin diluent are 720-760mPas.
4. method according to claim 2, it is characterised in that the solidification includes：It is 75-85 to control solidification temperature successively
DEG C, 115-125 DEG C, 145-155 DEG C, accordingly, successively control solidification time be 0.8-1.2h, 1.8-2.2h, 1.8-2.2h.
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| CN105778428B (en) * | 2016-03-24 | 2018-12-11 | 任有成 | A kind of epoxy resin-carbon fibre composite and its manufacturing method |
| CN105669951A (en) * | 2016-03-31 | 2016-06-15 | 武汉理工大学 | High-toughness modified epoxy resin and glass-fiber-reinforced board based on resin |
| CN107778773A (en) * | 2016-08-31 | 2018-03-09 | 中国石油化工股份有限公司 | Composition epoxy resin, its preparation method and application |
| CN106626439A (en) * | 2016-12-27 | 2017-05-10 | 长春工业大学 | Preparation method of low-cost and large-tow 48K carbon fiber preimpregnated cloth and composite material thereof |
| CN108658129A (en) * | 2018-08-02 | 2018-10-16 | 宁波高新区诠宝绶新材料科技有限公司 | A kind of tungsten hexafluoride purification devices adulterating low temperature material using bismuth |
| IT201800009487A1 (en) * | 2018-10-16 | 2020-04-16 | Cdz Compositi Srl | Artifact with three-dimensional profile made with a composite material, method of realization and intermediate processing of this artifact. |
| CN112111240B (en) * | 2020-09-17 | 2022-04-05 | 大连交通大学 | Carbon fiber porous polypropylene composite material applied to automobile anti-collision beam and preparation process |
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