CN109895469A - A method of optimization carbon fiber in epoxy composite system interface performance - Google Patents
A method of optimization carbon fiber in epoxy composite system interface performance Download PDFInfo
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- CN109895469A CN109895469A CN201910162510.1A CN201910162510A CN109895469A CN 109895469 A CN109895469 A CN 109895469A CN 201910162510 A CN201910162510 A CN 201910162510A CN 109895469 A CN109895469 A CN 109895469A
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- carbon fiber
- epoxy
- composite system
- system interface
- interface performance
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Abstract
The present invention provides a kind of method for optimizing carbon fiber in epoxy composite system interface performance, solves the problems, such as that existing interface cohesion is weak and causes compression and Interlaminar shear strengths poor when using " intercalation " thermoplastic material toughening liquid molding carbon fiber in epoxy composite system.The present invention between thermoplastic material and carbon fiber by adding an epoxy resin film, the resin film is made of matrix resin component, toughening element and interface modification component three parts, it is thermoplastic material-resin film-carbon fiber interface by changing original thermoplastic material and carbon fiber interface, while use " intercalation " thermoplastic material flexibilizing epoxy carbon fiber composite material system, its interface performance is not reduced.
Description
Technical field
The present invention relates to composite material toughening fields, specifically can be and are related to increasing using " intercalation " thermoplastic material
Tough liquid molding carbon fiber in epoxy composite system field, more particularly to a kind of optimization carbon fiber in epoxy composite system circle
The method of face performance.
Background technique
Carbon fiber is the main reinforcement fibres material for manufacturing high-performance composite materials, and reinforced resin based composites are navigating
Empty space industry is widely applied.With the development of technology, carbon fibre composite is in aerospace field using not
It is disconnected to expand, develop from secondary load-carrying construction part to main force support structure part, for aerospace main force support structure part, to composite material
Toughness more stringent requirements are proposed, main at present emerging to improve Qi still by the way of interlayer toughened, one of mode is just
Be by by thermoplasticity by the formal distribution of powder, film or non-woven fabrics in the interlayer of composite material, in this way can be effective
Raising composite material toughness, but since the melt viscosity of thermoplastic material is big, it is difficult to sufficiently infiltrate, cause with carbon fiber
Thermoplastic material is low with the interface bond strength of carbon fiber, and then the performances such as compression and interlayer shear for leading to composite material are lower.
Which limits the further application of carbon fibre composite, the interface performance for improving thermoplastic material and carbon fiber just seems very
It is necessary to.
Summary of the invention
The problem of existing in view of the above technology, the present invention provide a kind of improvement " intercalation " thermoplastic material toughening liquid molding
The method of carbon fiber in epoxy composite system interface performance.
The present invention is accomplished in the following manner:
A method of optimization carbon fiber in epoxy composite system interface performance, carbon fiber and thermoplastic material (powder, film or
Non-woven fabrics) between increase by an interfacial layer, the boundary layer is changed be plated in carbon fiber (unidirectional fibre, carbon fibre fabric) table in advance
Thermoplastic material (powder, film or non-woven fabrics) is then added to material surface by face
A further improvement of the present invention is that: the boundary layer is one layer of resin film, and surface density is 5 g/ ㎡ -50 g/ ㎡.
A further improvement of the present invention is that: its component of the resin film includes matrix resin 20%-80%, film forming agent 10%-
70%, nanoparticle 0.1%-5% and compatilizer 0.1%-10%.
A further improvement of the present invention is that: described matrix resin is bisphenol-A epoxy, Bisphenol F epoxy, epoxy novolac, more
One of functional group's epoxy or a variety of compositions,
A further improvement of the present invention is that: described matrix resin is identical as the resin Composition of matrices of composite material, adds ratio
The preferred 40%-70% of example.
A further improvement of the present invention is that: the film forming agent can be dissolved in described matrix resin, be rubber and thermoplastic
Particle class such as polysulfones, polyether-ketone, polyether-ether-ketone, polyetherimide, polyphenylene oxide, polymethyl methacrylate, is modified and gathers polyether sulfone
One of aryl ether sulfone and polycarbonate etc. or a variety of mixtures, adding proportion 10%-50%.
A further improvement of the present invention is that: the nanoparticle is the one of carbon nanotube, graphene and its modifier etc.
Kind or a variety of mixtures, the preferred 0.1%-3% of adding proportion.
A further improvement of the present invention is that: the compatilizer be response type compatilizer or non-reactive compatilizer, wherein
Response type compatilizer is the copolymer containing active end group, and non-reactive compatilizer is block or graft copolymer.
A further improvement of the present invention is that: the compatilizer is maleic anhydride graft PP O, SMA, maleic anhydride is grafted
The one or more mixtures of SEBS.
To sum up, boundary layer of the invention mainly includes four components: matrix resin component A: matrix component；Film forming agent B: it mentions
High film build；Nanoparticle C: interface bond strength is improved；Compatilizer D: interface bond strength is improved.
Component A is 20%-80%, component B is 10%-70%, component C is 0.1%-5%, component D is 0.1%-10%.
The typical production process of boundary layer of the present invention are as follows:
Step 1: component C and component D are dispersed in component A, component E is obtained；
Step 2: addO-on therapy B obtains component F so that component B is substantially dissolved in mixture；
Step 3: resin F to be made to the film G of certain grammes per square metre in special-purpose film-coating equipment；
The surface density of film G of the present invention is 5g/ ㎡ ~ 50g/ ㎡.
Beneficial effects of the present invention: it is compound to solve use " intercalation " thermoplastic material toughening liquid molding carbon fiber in epoxy
When material system existing interface cohesion it is weak and cause compression and Interlaminar shear strengths difference problem.By thermoplastic material with
An epoxy resin film is added between carbon fiber, the resin film is by matrix resin component, toughening element and interface modification component three parts
Composition is thermoplastic material-resin film-carbon fiber interface by changing original thermoplastic material and carbon fiber interface, makes
While with " intercalation " thermoplastic material flexibilizing epoxy carbon fiber composite material system, its interface performance is not reduced, this hair is added
After bright boundary layer, interfacial combined function can be improved, it is compound to expand carbon fiber while not reducing the toughness of composite material
Application of the material in aerospace field.
Specific embodiment
The present invention will be further described in detail With reference to embodiment.
The present embodiment provides a kind of methods for optimizing carbon fiber in epoxy composite system interface performance, in carbon fiber and heat
Increase by an interfacial layer between plastic material (powder, film or non-woven fabrics), the boundary layer is changed be plated in carbon fiber (unidirectional fibre in advance
Dimension, carbon fibre fabric) surface, thermoplastic material (powder, film or non-woven fabrics) is then added to material surface
The boundary layer is one layer of resin film, and surface density is 5 g/ ㎡ -50 g/ ㎡.
The boundary layer of the present embodiment mainly includes four components: matrix resin component A: matrix component；Film forming agent B: it improves
Film forming；Nanoparticle C: interface bond strength is improved；Compatilizer D: interface bond strength is improved.
Component A is 20%-80%, component B is 10%-70%, component C is 0.1%-5%, component D is 0.1%-10%.
The typical production process of boundary layer described in the present embodiment are as follows:
Step 1: component C and component D are dispersed in component A, component E is obtained；
Step 2: addO-on therapy B obtains component F so that component B is substantially dissolved in mixture；
Step 3: resin F to be made to the film G of certain grammes per square metre in special-purpose film-coating equipment；
The surface density of film G described in the present embodiment is 5g/ ㎡ ~ 50g/ ㎡.
Embodiment 1:
Comparison: using T300 carbon fibre fabric, and surface density is 160g/ ㎡；Resin matrix is that a intermediate temperature setting liquid epoxy is (main
Body epoxy resin ingredient is E-51).Toughening is carried out using one layer of 6g/ ㎡ polyester non-woven fabric, performance see the table below 1；
It improves: on the basis of comparison system, increasing by a bed boundary between polyester non-woven fabric and carbon fibre fabric and improve layer, the level
Density is 8g/ ㎡, consisting of: 80%E-51 epoxy, 18% CTBN, 0.5%CNT and 1.5% ethylene vinyl acetate are grafted Malaysia
Acid anhydrides.Its performance see the table below 1:
1 performance comparison of table
After improvement, material system compression and Interlaminar shear strengths improves to some extent, and impact after compression performance substantially not
Become.
Embodiment 2:
Comparison: using T800 carbon fibre fabric, and surface density is 190g/ ㎡；Resin matrix is that a hot setting liquid epoxy is (main
Body epoxy resin ingredient is AG-80).Toughening is carried out using one layer of 6g/ ㎡ polyamide non-woven fabrics, performance see the table below 2；
It improves: on the basis of comparison system, increasing by a bed boundary between polyamide non-woven fabrics and carbon fibre fabric and improve layer, the layer
Surface density is 14g/ ㎡, consisting of: 55%AG-80 epoxy resin, 40% polyether sulfone, 1%CNT and 4% SMA.Its performance see the table below
2:
2 performance comparison of table
After improvement, compression performance improves to some extent after material system compression, interlayer shear and impact.
The present embodiment is answered the utility model has the advantages that solving use " intercalation " thermoplastic material toughening liquid molding carbon fiber in epoxy
When condensation material system existing interface cohesion it is weak and cause compression and Interlaminar shear strengths difference problem.The present invention passes through in thermoplastic
An epoxy resin film is added between property material and carbon fiber, the resin film is by matrix resin component, toughening element and interface modification group
Divide three parts composition, is thermoplastic material-resin film-carbon fiber circle by changing original thermoplastic material and carbon fiber interface
Face does not reduce its interface performance, adds while use " intercalation " thermoplastic material flexibilizing epoxy carbon fiber composite material system
After entering boundary layer of the invention, interfacial combined function can be improved, carbon fiber is expanded while not reducing the toughness of composite material
Composite material is tieed up in the application of aerospace field.
Above-described specific example is intended merely to that the present invention will be described in detail, but is not damaging spirit of the invention and model
In the case where enclosing, various modifications may be made, modification, this is clear for those skilled in the art.
Claims (9)
1. a kind of method for optimizing carbon fiber in epoxy composite system interface performance, it is characterised in that: in carbon fiber and thermoplastic
Increase by an interfacial layer between property material (powder, film or non-woven fabrics), the boundary layer is changed in advance be plated in carbon fiber (unidirectional fibre,
Carbon fibre fabric) surface, thermoplastic material (powder, film or non-woven fabrics) is then added to material surface.
2. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 1, feature
Be: the boundary layer is one layer of resin film, and surface density is 5 g/ ㎡ -50 g/ ㎡.
3. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 2, feature
Be: its component of the resin film includes matrix resin 20%-80%, film forming agent 10%-70%, nanoparticle 0.1%-5% and compatible
Agent 0.1%-10%.
4. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 3, feature
Be: described matrix resin is one of bisphenol-A epoxy, Bisphenol F epoxy, epoxy novolac, multifunction group epoxy or a variety of groups
At.
5. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 3, feature
Be: described matrix resin is identical as the resin Composition of matrices of composite material, and each component adding proportion is 40%-70%.
6. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 3, feature
Be: the film forming agent can be dissolved in described matrix resin, be rubber and thermoplastic particle class for example polysulfones, polyether sulfone, polyether-ketone,
One of polyether-ether-ketone, polyetherimide, polyphenylene oxide, polymethyl methacrylate, modified polyarylether sulfone and polycarbonate etc.
Or a variety of mixtures, adding proportion 10%-50%.
7. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 3, feature
Be: the nanoparticle is one or more mixtures of carbon nanotube, graphene and its modifier etc., and adding proportion is
0.1%-3%。
8. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 3, feature
Be: the compatilizer is response type compatilizer or non-reactive compatilizer, and wherein response type compatilizer is to contain active end group
Copolymer, non-reactive compatilizer be block or graft copolymer.
9. a kind of method for optimizing carbon fiber in epoxy composite system interface performance according to claim 3, feature
Be: the compatilizer is maleic anhydride graft PP O, SMA, the one or more mixtures of maleic anhydride-g-SBS, addition
Ratio is 1%-5%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112810259A (en) * | 2021-01-18 | 2021-05-18 | 吉林大学 | Synergistic bionic composite material laminated plate based on bird feathers and preparation method thereof |
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| CN112810259B (en) * | 2021-01-18 | 2022-01-04 | 吉林大学 | Synergistic bionic composite material laminated plate based on bird feathers and preparation method thereof |
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