CN104589743B - Conductive programmable toughness reinforcing non-woven fabrics and composite - Google Patents
Conductive programmable toughness reinforcing non-woven fabrics and composite Download PDFInfo
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- CN104589743B CN104589743B CN201410818415.XA CN201410818415A CN104589743B CN 104589743 B CN104589743 B CN 104589743B CN 201410818415 A CN201410818415 A CN 201410818415A CN 104589743 B CN104589743 B CN 104589743B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
- B32B2255/205—Metallic coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
Abstract
The invention belongs to the technical field of structural composite material, it is related to a kind of conductive programmable toughness reinforcing non-woven fabrics and composite.Architectural feature of the present invention according to lamination carbon fiber resin matrix composite, develop a kind of novel metallizing treatment process of nonwoven cloth material for toughness reinforcing, and thus prepare and design with conductive carbon fibre composite, profit can solve the problems, such as development structure conduction integrated composite in this way needed for toughness reinforcing low conduction present in electric conductivity non-woven fabrics preparation process, high cost, high pollution, metal level distribution it is uncontrollable and unfavorable to final composite material toughness, and the composite for preparing is with impact injury impedance higher and damage tolerance.The present invention can be designed to the conductive structure on non-woven fabrics, obtain various conductive patterns, it is also possible to obtain the composite of monolithic conductive, can so design the interlayer conductive structure of composite, can also keep toughness reinforcing performance higher.
Description
Technical field
The invention belongs to the technical field of structural composite material, it is related to a kind of conductive programmable toughness reinforcing non-woven fabrics and answers
Condensation material.
Background technology
The enhanced polymer matrix composites of continuous carbon fibre are led due to its specific strength high, specific modulus in Aeronautics and Astronautics etc.
The application in domain is more and more extensive.This material is typically using continuous carbon fiber as reinforcing material, using thermosetting resin as
Matrix is composited, and resin toughness low in itself and electrical insulating property cause continuous carbon fibre reinforced resin based composites in application
During face anti-lightning strike problem and low-velocity impact damage problem.
Composite low electric conductivity problem brings the anti-lightning strike problem of aircraft, considerably increases dangerous system during flight
Number；The deficiency of the characteristic such as the anti-low velocity impact problem of composite brings anti-ice hail and impact resistance, anti-tire debris are penetrated.Knot
Structure-functions are turned to the solution of the material in future, if while composite structure performance is improved, improving multiple
The electric conductivity of condensation material itself, enables it to possess lightning resistance.Current common practice is using conductive nanometer material in the world
Material modified composite material interlayer, the carbon nanometer with excellent mechanical performance such as using CNT, Graphene, nano graphite flakes
Material, but the raising of electric conductivity is very limited；Another nano silver material of the metal of way addition high connductivity, but to mechanical property
Can have undesirable effect.
Chinese patent《A kind of composite conducting thin layer and its preparation method and application》(CN2012102512857) one is provided
Planting makes composite while the solution of toughness reinforcing and high connductivity, by the nano wire of the appendix argent on fabric construction, obtains
To the toughness reinforcing intercalation of high connductivity, the interlaminar fracture toughness of composite and electric conductivity are made significantly after being applied to composite
Improve, but the metal silver nanowires price that this method is used is very expensive, and electric conductivity is also not enough, and (intercalation surface is than electricity
Resistance>1ohm).
Chinese patent (a kind of toughness reinforcing non-woven fabrics and preparation method 201310541074.1 containing the coat of metal) is then to this
Method is further improved, and (surface specific resistance can be less than to make use of a kind of toughness reinforcing non-woven fabrics containing the coat of metal
0.05ohm), increased substantially conductivity of composite material.But the method for generally preparing this material use chemical plating,
This method consumes a large amount of water and chemicals, causes substantial amounts of chemical contamination and heavy metal pollution, and cannot be right
The coat of metal carries out fine control；Using the method for chemical plating, the surface of whole non-woven fabrics is covered with metal level, further
After being shaped to composite, the problem of inevitable Presence of an interface, causes layer between non-woven fabrics fiber-metal-matrix resin
Between fracture toughness a certain degree of decline.
To sum up, preferable solution is controllable new of a kind of low stain of research and development, low cost, conductive coating structure
The technology of preparing and corresponding material of type high connductivity toughness reinforcing non-woven fabrics.
The content of the invention
The purpose of the present invention：The present invention is directed to problem of the prior art, according to lamination carbon fiber resin matrix composite
Architectural feature, proposes the conductive programmable toughness reinforcing non-woven fabrics and composite of a kind of nonwoven cloth material for toughness reinforcing.
The purpose of the present invention is achieved through the following technical solutions：
(1) the porous carrier of areal density is taken, organic silver solution is evenly spread into the porous carrier surface of areal density,
Organic silver solution viscosity is 100~10000mPa ﹒ s, then 5~120min is processed at 100~250 DEG C, obtains monolithic conductive
Toughness reinforcing non-woven fabrics；(2) the porous carrier of areal density is taken, organic silver solution is coated to non-woven fabrics table by arbitrary graphic pattern
Face, organic silver solution viscosity is 1000~50000mPa ﹒ s, removing 10 of then being volatilized in the vacuum of room temperature~70 DEG C~
The solvent of 80wt%, then 5~120min is processed at 100~250 DEG C, obtain the non-woven fabrics with pattern conductive structure；
Wherein the porous carrier of areal density is porous fabric, the non-woven fabrics being made up of very thin fiber, the thickness 5 of carrier
μm~60 μm, the surface density of carrier is 5g/m2~30g/m2Between, fibre diameter is 500nm~20 μm, low density porous carrier
Porosity is between 50~90%；Organic silver solution is by silver-colored organic complex, organic solvent, the thickener group for adjusting viscosity
Into silver element mass percentage content is 3~15%.
Organic silver solution is using shower nozzle or printer or method for printing screen or is manually coated to nonwoven surface, composition
Pattern is the combination of dot matrix, grid or dot matrix and grid, and pattern is distributed in whole nonwoven surface repeatability.
Include the low polar solvent of 1~10wt% in the composition of organic silver solution, or include the table of 0.1~1wt%
Face activating agent.
Porous non-woven fabrics material is nylon, polyolefin, polyurethane, polyester, PAEK, polyimides, polyetherimide
Amine, polyether sulfone, polyether-ether-ketone, aramid fiber.
By conductive programmable toughness reinforcing the carbon fibre composite with interlayer conductive structure, i.e. interlayer are prepared with non-woven fabrics
Intercalation or surface covering are prepared compound by the continuous carbon fibre reinforced resin base of described conductive programmable toughness reinforcing non-woven fabrics
Material.
The architectural feature of the composite has following several：(1) conductive programmable toughness reinforcing non-woven fabrics is distributed in compound
Material surface and it is distributed in 0~5 interlayer of neighbouring surface from outside to inside successively, the conductive programmable increasing that each interlayer is included
The number of plies of tough use non-woven fabrics is no more than 1, and the conductive programmable toughness reinforcing non-woven fabrics for being distributed in surface is no more than 3 layers；(2) it is conductive
Programmable toughness reinforcing non-woven fabrics is distributed in the several interlayers in the middle of composite, the conductive programmable increasing that each interlayer is included
The number of plies of tough use non-woven fabrics is no more than 1, and total quantity is between 1 layer the 50% of the interlayer number total to composite；(3) conduction can set
The toughness reinforcing non-woven fabrics of meter is distributed in first interlayer of composite neighbouring surface, second layer of composite neighbouring surface
Between one layer of non-woven fabrics without conductive processing is distributed with；(4) one or two surface of composite and all interlayers are all included
The number of plies for having conductive programmable toughness reinforcing non-woven fabrics, the conductive programmable toughness reinforcing non-woven fabrics that each interlayer is included is no more than
1。
Advantages of the present invention and feature are：
The present invention develops a kind of non-woven fabrics for toughness reinforcing according to the architectural feature of lamination carbon fiber resin matrix composite
The novel metallizing treatment process of material, and thus prepare and design with conductive carbon fibre composite, using this
Method can solve development structure-conduction integrated composite needed for toughness reinforcing electric conductivity non-woven fabrics preparation process in exist
Low conduction, high cost, high pollution, metal level be distributed uncontrollable and unfavorable to final composite material toughness problem, and make
Standby composite has impact injury impedance higher and damage tolerance.The conducting of the toughness reinforcing non-woven fabrics that the present invention is provided
Method, can be designed to the conductive structure on non-woven fabrics, obtain various conductive patterns, it is also possible to obtain overall leading
Electrical composite, can so design the interlayer conductive structure of composite, can also keep toughness reinforcing performance higher.This
Outward, the conductive structure electric conductivity that this metallizing treatment process is obtained is high, and the pollution that processing procedure is produced seldom, is substantially increased
Structure-conduction integrated composite designability and applicability.The technical scheme is that a kind of new in order to develop
It is applied to the electricity conduction method and novel conductive structure of the toughness reinforcing of lamination carbon fibre composite and the feature intercalation of conduction
Toughness reinforcing intercalation, this new electricity conduction method be directed to toughness reinforcing nonwoven fabric construct feature, solve electric conductivity, prepare when pollute
Property, conductive designability problem.There is structure designability and versatility with composite prepared by this intercalation.
Brief description of the drawings
The SEM figures of the conducting modification nonwoven cloth that Fig. 1 are prepared using the inventive method.
Specific embodiment：
Design of the invention and technology of preparing are described in further details below by embodiment.
Embodiment 1：
The implementation process of technical solution of the present invention is as follows：
The thickness that (1-1) takes cleaning is 53 μm, surface density is 14g/m2Nylon nonwoven fabrics or thickness be 35 μm, surface density
It is 13g/m2Nylon nonwoven fabrics or thickness be 25 μm, surface density be 8g/m2Polyether-ether-ketone non-woven fabrics or thickness be 25 μm, face
Density is 7g/m2Polyether sulfone non-woven fabrics；The organic silver for taking the citric acid silver-based that viscosity is 3000mPa ﹒ s or 20000mPa ﹒ s is molten
Liquid, silver content is 13wt%, adds the poly- second of the dimethylbenzene or 0.2% mass fraction for the mass fraction of organic silver solution 3%
Vinyl pyrrolidone, stirring and dissolving is uniform.Sprayed with the nozzle that bore is 1.5mm or Extrusion Coating is to the surface of non-woven fabrics, applied
The types of patterns covered for rhombus that acute angle is 60 degree composition network-like pattern and be distributed and expire whole non-woven fabrics, the rhombus length of side is
5mm, coated weight is every square meter coated area (referring to coating zone, not including uncoated region) 120g or 320g organic silver solution,
The 25wt% or the solvent (accounting for the amount of total solvent) of 70wt% being warmed up under vacuo again in 45 DEG C of removal organic silver solution, then
Processed 40 minutes at 185 DEG C again, obtain the toughness reinforcing non-woven fabrics with pattern conductive structure；
The thickness that (1-2) takes cleaning is 47 μm, surface density is 16g/m2Aramid fiber non-woven fabrics or thickness be 25 μm, surface density
It is 8g/m2Polyether-ether-ketone non-woven fabrics or thickness be 16 μm, surface density be 4g/m2Nanometer PEI non-woven fabrics.Take viscosity
It is the organic silver solution of the citric acid silver-based of 400mPa ﹒ s, silver content is 12wt%, it is the mass of organic silver solution 2% point to add
Several dimethylbenzene, stirring and dissolving is uniform.Non-woven fabrics is immersed into organic silver solution, vacuum removal 40% at room temperature is taken out again
Solvent (accounting for the amount of total solvent), then again at 175 DEG C process 50 minutes, obtain the toughness reinforcing non-woven fabrics of monolithic conductive；
The non-woven fabrics of the conducting that (1-3) obtains above-mentioned (1-1) or (1-2) is positioned over continuous carbon fibre and unidirectionally increases one by one
The interlayer of strong epoxy resin-matrix prepreg carries out laying, and carbon fiber ply sequence is [+45,0, -45,90]4s, and make each
The interlayer of carbon fiber all one layer of non-woven fabrics of conducting of intercalation, carbon fiber T300,3K or carbon fiber T800,12K, epoxy resin
5228 (Beijing Research Inst. of Aeronautic Material's products) or QY9611 (Beijing Aviation manufacturing engineering research institute product), after compressing and shaping
Obtain the composite preform of intercalation；By the curing process that the epoxy prepreg specifies, by above-mentioned intercalation conducting
The composite preform of non-woven fabrics carries out vacuum forming solidification using conventional mould pressing method, obtains epoxy resin-matrix toughness reinforcing
Conductive composite product；
(1-4) takes the conducting non-woven fabrics of (1-1) obtained above or (1-2), extracting epoxy resin prepreg, carbon fiber
T800,3K or M70,12K, epoxy resin 5228 (Beijing Research Inst. of Aeronautic Material's product), by film paving the one of prepreg
Face, makes it be fixed on prepreg surface with hot iron bucket, obtains the modified carbon fibre resin prepreg of conducting；Take obtained above
The modified carbon fibre resin prepreg 8 of conducting, then carries out laying, and ply stacking-sequence is [90,0]2s, make veneer and without cloth
Face is mutually pasted, and each interlayer has toughness reinforcing non-woven fabrics, and composite preform is obtained after sizing；By the epoxy resin prepolymer
The fixed curing process of leaching gauge, by the composite laminated precast body of above-mentioned conductive modified using conventional molding or autoclave side
Method carries out vacuum forming solidification, obtains the good laminated slab products of epoxy resin-base composite material of the toughness of high connductivity；
(1-5) takes conducting modified carbon fiber resin prepreg material and the 13 untreated preimpregnation that 3 (1-4) are obtained
Material, the conduction of the modified prepreg of conducting is faced up and is coated with upper three layers, and other 13 prepregs are coated with in order
Face, ply stacking-sequence is [90 ,+45, -45,0]2s, composite preform is obtained after sizing；Specify by the epoxy prepreg
Curing process, the composite laminated precast body of above-mentioned conductive modified is carried out very using conventional molding or autoclave method
Empty forming and hardening, obtains the good laminated slab products of epoxy resin-base composite material of the toughness of top layer high connductivity；
A kind of non-woven fabrics of conducting that the present embodiment (1-1) is obtained, the conductive structure with patterning, and the present embodiment
A kind of non-woven fabrics of conducting that (1-2) is obtained then has monolithic conductive, and surface specific resistance is 0.1ohm, is significantly less than reference
The toughness reinforcing of the nano silver wire appendix of patent application document is with non-woven fabrics (CN201210251285.7).Per square meter non-woven fabrics conducting
The solvent and chemicals quality of consumption are usually no more than 200g/m2, and solvent can be partially recycled in evaporation, and
The chemical plating method of CN201310541074.1 produces about 2500g/m2Waste liquid (not calculating nonwoven surface process part), its
In containing measuring amine and heavy metal ion greatly.Prepared by (1-3) (1-4) is the composite with monolithic conductive, and (1-5)
Preparing surface and top layer with it has the composite of superior electrical conductivity, is particularly useful for the lightning Protection of composite.
Embodiment 2：
The implementation process of technical solution of the present invention is as follows：
(2-1) takes thickness for 55 μm, surface density are 20g/m2Polyethylene nonwoven or thickness be 35 μm, surface density be
10g/m2PEI non-woven fabrics or thickness be 15 μm, surface density be 5g/m2Nanometer aramid fiber non-woven fabrics, taking viscosity is
The organic silver solution of the capric acid silver-based of 3000mPa ﹒ s or 15000mPa ﹒ s, silver dollar cellulose content is 7wt%.With the spray that bore is 1mm
Mouth sprays or Extrusion Coating is to nonwoven surface, and the types of patterns of coating is the waffle-like pattern that square is constituted and distribution is completely whole
Individual non-woven fabrics, the square length of side is 3mm, and coated weight is every square meter coated area (referring to coating zone, not including uncoated region)
250g or 330g organic silver solution, then 35 DEG C of solvents for removing 15 or 55wt% in organic silver solution are warmed up under vacuo
(accounting for the amount of total solvent), is then processed 40 minutes at 215 DEG C again, obtains the toughness reinforcing nonwoven with pattern conductive structure
Cloth；
(2-2) is by conducting modifying aramid fiber non-woven fabrics obtained above paving on prepreg surface, the carbon fiber of prepreg
T700,12K, polyimide resin base prepreg trade mark LP 15 (Beijing Research Inst. of Aeronautic Material's product), resin quality fraction is
38%, after hot rollers roll, resin homogeneous impregnation non-woven fabrics, become entirety with the aramid fiber containing nickel coating without
The prepregs of cloth are spun, final resin quality fraction is 35%.The polyethylene nonwoven that conducting obtained above is modified
Paving on prepreg surface, carbon fiber T800,12K of prepreg, epoxy resin 5228 (Beijing Research Inst. of Aeronautic Material's product),
Resin quality fraction is 42%, after hot rollers roll, resin homogeneous impregnation non-woven fabrics, become entirety with leading
The prepregs of the modified polyethylene nonwoven of electrification, final resin quality fraction is 38%；
(2-3) gathers the prepregs of the above-mentioned aramid fiber non-woven fabrics being modified with conducting, i.e. carbon fiber T700,12K
Polyimide base resin prepreg trade mark LP 15 (Beijing Research Inst. of Aeronautic Material's product), by [0]24Laying, then by the mark of the resin
Quasi- curing process solidification, obtains the polyimide resin based composites of high connductivity toughness reinforcing high.
Embodiment 3：
The implementation process of technical solution of the present invention is as follows：
The thickness that (3-1) takes cleaning is 30 μm, surface density is 10g/m2Polyester non-woven fabric or thickness be 35 μm, surface density
It is 10g/m2Polyimide nonwoven fabric or thickness be 25 μm, surface density be 7g/m2Aramid fiber non-woven fabrics, taking viscosity is
The organic silver solution of the citric acid silver-based of 18500mPa ﹒ s, silver content is 12wt%, is extruded with the nozzle print machine that bore is 1mm
Coating or handwritten drawings are coated to the surface of non-woven fabrics, and the pattern for using is an integrated circuit diagram, and coated weight is that every square meter is applied
Clad can accumulates (referring to coating zone, not including uncoated region in grid) 145g or 240g organic silver solution, then heats up under vacuo
To 15wt% or the solvent (accounting for the amount of total solvent) of 50wt% in 35 DEG C of removal organic silver solution, then locate at 190 DEG C again
Reason 40 minutes, obtaining surface has the non-woven fabrics of conductive integrated circuit diagram；
A kind of non-woven fabrics containing circuit diagram obtained in the present embodiment, circuit is made up of silver in itself, electrically conductive, with latent
In high tenacity and the interior purposes for burying integrated circuit composite application.
Embodiment 4：
The implementation process of technical solution of the present invention is as follows：
The thickness that (4-1) takes cleaning is 42 μm, surface density is 16g/m2Polyurethane non-woven fabrics or thickness be 35 μm, face it is close
It is 10g/m to spend2Polyether-ether-ketone non-woven fabrics, take the organic silver solution of the laurate silver-based that viscosity is 150mPa ﹒ s, silver content is
8wt%, non-woven fabrics is immersed in organic silver solution, is taken out, and is then processed 15 minutes at 200 DEG C again, repeats operation leaching
Stain and the process one time of heat treatment, obtain the non-woven fabrics with monolithic conductive；
(4-2) takes the non-woven fabrics 2 with monolithic conductive that (4-1) is obtained, and takes non-conductive non-woven fabrics one, takes unidirectional
16 layers of carbon fibre fabric carries out laying, and carbon fiber ply sequence is [0,90]4s, the non-woven fabrics laying of conductive treatment is in most appearance
Face and interior one layer of interlayer, non-conductive nonwoven are arranged in interior two layers of interlayer, and sizing obtains precast body；
(4-3) utilizes RTM techniques, by liquid benzoxazine (BOZ) resin (German Henkel Products Epsilon) or
The resin of liquid epoxy 3266 (Beijing Research Inst. of Aeronautic Material's product) injects precast body and impregnates complete, then according to the BOZ trees
The technique that fat or epoxy resin specify is molded and is solidified, and finally gives the benzoxazine colophony base or asphalt mixtures modified by epoxy resin of RTM shapings
The composite product of aliphatic radical toughness reinforcing-conduction integration.
7 and 16 carbon fibers of above-mentioned non-woven fabrics are carried out laying by (4-4), carbon fiber ply sequence for [- 45,0,45,
90]4s, carbon fiber CCF300,3K, conductive non-woven fabrics laying mode is：Non-woven fabrics one by one laying in 7 centres of carbon fiber laying
Interlayer, i.e. interlayer of the laying between 8-15 layers of carbon fiber laying obtain composite preform after sizing；Recycle
RTM techniques, by liquid benzoxazine (BOZ) resin (German Henkel Products Epsilon) or the resin of liquid epoxy 3266
(Beijing Research Inst. of Aeronautic Material's product) injects precast body and impregnates complete, then specifies according to the BOZ resins or epoxy resin
Technique be molded and solidified, finally give the benzoxazine colophony base or epoxy resin-matrix toughness reinforcing-conduction of RTM shapings integrally
The composite product of change.
The composite of the high connductivity toughness reinforcing that above-described embodiment (4-3) is obtained, has taken into account the excellent table of anti-lightning strike needs
Toughness reinforcing needed for multilayer that face electric conductivity and nearly inner surface electric conductivity, electromagnetic shielding need and monolithic conductive, shock resistance, and
The balance of weightening and electric conductivity is taken into account, because second interlayer has one layer of Insulation non-woven fabric, surface may also operate as preventing outer
Portion's electric current enters the effect of composite inner surface.And (4-4) has then taken into account intermediate layer to post-impact compression performance impact
Larger factor, the composite for obtaining is more suitable for needing the occasion of excellent electromagnetic shielding properties and impact property.
Embodiment 5：
The implementation process of technical solution of the present invention is as follows：
(5-1) take 35 μm, surface density be 10g/m2Polyimide nonwoven fabric, take viscosity be 18500mPa ﹒ s citric acid
The organic silver solution of silver-based, silver content is 12wt%, the surface of non-woven fabrics is covered in the film with 1mm apertures, using brush
The method of painting makes organic silver solution be assigned on non-woven fabrics with point-like, and coated weight is that every square meter coated area (refers to coating zone, no
Including uncoated region) 215g or 340g organic silver solution, then be warmed up under vacuo 55 DEG C removal organic silver solution in 15
Or the solvent (accounting for the amount of total solvent) of 25wt%, then processed 55 minutes at 190 DEG C again, there is spot distribution to lead to obtain surface
The non-woven fabrics of electricity；
(5-4) takes the surface that (5-3) obtain has the conductive non-woven fabrics 9 of spot distribution, removes carbon fiber unidirectional cloth 8,
Carbon fiber ply sequence is [90,0]8, carbon fiber CCF300,3K, each interlayer intercalation layer of non-woven fabric；Using RTM techniques,
The resin of liquid span 6421 (Beijing Research Inst. of Aeronautic Material's product) is injected into precast body and impregnates complete, then according to the resin
The technique of regulation is molded and is solidified, and finally gives the resin-based toughness reinforcing of the bismaleimide resin base-conduction integration of RTM shapings
Composite product.
Composite product derived above has good thickness direction electric conductivity without using substantial amounts of argent, keeps away
Exempt from weightening and cost.
Claims (7)
1. a kind of conductive programmable toughness reinforcing non-woven fabrics, it is characterised in that：(1) the porous carrier of areal density is taken, will be organic
Silver-colored solution evenly spreads to the porous carrier surface of areal density, and organic silver solution viscosity is 100~10000mPa ﹒ s, then
5~120min is processed at 100~250 DEG C, the toughness reinforcing non-woven fabrics of monolithic conductive is obtained；(2) the porous load of areal density is taken
Body, nonwoven surface is coated to by organic silver solution by arbitrary graphic pattern, and organic silver solution viscosity is 1000~50000mPa ﹒ s, with
Volatilized in the vacuum of room temperature~70 DEG C afterwards and remove the solvent of 10~80wt%, then 5~120min is processed at 100~250 DEG C,
Obtain the toughness reinforcing non-woven fabrics with pattern conductive structure；
The wherein porous carrier of areal density is the porous non-woven fabrics being made up of very thin fiber, 5 μm~60 μm of the thickness of carrier,
The surface density of carrier is 5g/m2~30g/m2Between, fibre diameter is 500nm~20 μm, and areal density porous carrier porosity exists
Between 50~90%；Organic silver solution is made up of the thickener of silver-colored organic complex, organic solvent, regulation viscosity, silver element
Mass percentage content is 3~15%.
2. the conductive programmable toughness reinforcing non-woven fabrics of one kind according to claim 1, it is characterised in that：Organic silver solution profit
With shower nozzle or printer or method for printing screen or nonwoven surface is manually coated to, the pattern of composition is dot matrix, grid or point
The combination of battle array and grid, pattern is distributed in whole nonwoven surface repeatability.
3. the conductive programmable toughness reinforcing non-woven fabrics of one kind according to claim 1, it is characterised in that：Organic silver solution
Include the low polar solvent of 1~10wt% in composition, or include the surfactant of 0.1~1wt%.
4. the conductive programmable toughness reinforcing non-woven fabrics of one kind according to claim 1, it is characterised in that：Porous non-woven fabrics
Material is nylon, polyolefin, polyurethane, polyester, PAEK, polyimides, polyether sulfone, polyether-ether-ketone, aramid fiber.
5. the conductive programmable toughness reinforcing non-woven fabrics of one kind according to claim 4, it is characterised in that：Porous non-woven fabrics
Material is PEI.
6. a kind of composite being made of non-woven fabrics with conductive programmable toughness reinforcing, it is characterised in that：By such as claim 1 institute
The conductive programmable toughness reinforcing non-woven fabrics stated prepare the carbon fibre composite with interlayer conductive structure, i.e. interlayer intercalation or
Surface covering prepares composite by the continuous carbon fibre reinforced resin base of described conductive programmable toughness reinforcing non-woven fabrics.
7. a kind of composite being made of non-woven fabrics with conductive programmable toughness reinforcing as claimed in claim 6, its feature exists
In：The architectural feature of the composite has following several：(1) conductive programmable toughness reinforcing non-woven fabrics is distributed in composite table
Face and it is distributed in 0~5 interlayer of neighbouring surface from outside to inside successively, the conductive programmable toughness reinforcing nothing that each interlayer is included
The number of plies for spinning cloth is no more than 1, and the conductive programmable toughness reinforcing non-woven fabrics for being distributed in surface is no more than 3 layers；(2) conduction can be designed
Toughness reinforcing non-woven fabrics be distributed in several interlayers in the middle of composite, the conductive programmable toughness reinforcing nothing that each interlayer is included
The number of plies for spinning cloth is no more than 1, and total quantity is between 1 layer the 50% of the interlayer number total to composite；(3) conductive programmable increasing
Tough non-woven fabrics is distributed in first interlayer of composite neighbouring surface, second interlayer distribution of composite neighbouring surface
There is one layer of non-woven fabrics without conductive processing；(4) one or two surface of composite and all interlayers all include conduction
Programmable toughness reinforcing non-woven fabrics, the number of plies of the conductive programmable toughness reinforcing non-woven fabrics that each interlayer is included is no more than 1.
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| CN111070722B (en) * | 2018-10-19 | 2021-10-22 | 哈尔滨工业大学 | Preparation method of lightning protection composite material based on heat insulation and insulation mechanism |
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| US5171419A (en) * | 1990-01-18 | 1992-12-15 | American Cyanamid Company | Metal-coated fiber compositions containing alloy barrier layer |
| US5370921A (en) * | 1991-07-11 | 1994-12-06 | The Dexter Corporation | Lightning strike composite and process |
| EP2363429A1 (en) * | 2006-03-10 | 2011-09-07 | Goodrich Corporation | Low density lightining strike protection for use in airplanes |
| GB0805640D0 (en) * | 2008-03-28 | 2008-04-30 | Hexcel Composites Ltd | Improved composite materials |
| WO2009151056A1 (en) * | 2008-06-10 | 2009-12-17 | ダイセル化学工業株式会社 | Layered product having porous layer and functional layered product made with the same |
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| CN102785437B (en) * | 2012-07-19 | 2016-08-03 | 中国航空工业集团公司北京航空材料研究院 | A kind of composite conducting thin layer and its preparation method and application |
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