CN105818476A - Surface-modification three-dimensional-network-carbon-fiber-reinforced composite material and preparing method - Google Patents
Surface-modification three-dimensional-network-carbon-fiber-reinforced composite material and preparing method Download PDFInfo
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- CN105818476A CN105818476A CN201610162453.3A CN201610162453A CN105818476A CN 105818476 A CN105818476 A CN 105818476A CN 201610162453 A CN201610162453 A CN 201610162453A CN 105818476 A CN105818476 A CN 105818476A
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- carbon fiber
- diamond
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- graphene
- composite
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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Abstract
The invention discloses a surface-modification three-dimensional-network-carbon-fiber-reinforced composite material and a preparing method.Three-dimensional carbon fiber frameworks with different bore diameters are prepared as required, and after surface pretreatment, diamond, carbon nanometer tubes and graphene are subjected to chemical vapor deposition; then the mixture and matrix materials are compounded, wherein the matrix materials are metal or polymers; the carbon-fiber-reinforced metal-based or polymer-based composite material with the three-dimensional net-shaped framework structure is obtained.A three-dimensional continuous heat conduction channel is formed in the composite material through the surface-modification three-dimensional net-shaped carbon fibers, and therefore the heat conduction performance of the composite material is greatly improved; meanwhile, according to space distribution of carbon fibers in the matrix material, the mechanical performance of the composite material can also be improved, and the density and the thermal expansion coefficient can be decreased; the thermal expansion coefficient, the mechanical performance and the thermal performance can be further regulated and controlled by adding zero-dimensional particle reinforcement.
Description
Technical field
The invention discloses a kind of surface modification three-dimensional network carbon fibre reinforced composite and preparation method, belong to technical field of composite preparation.
Background technology
The intensification of international competition develops, and constantly expedites the emergence of the fast development of science and technology, and microelectric technique and guidance technology become the inter-State most important thing falling over each other development naturally.Each class of electronic devices degree of integration is more and more higher, and energy density is increasing, and the heat of generation gets more and more, and for guaranteeing equipment steady operation, needs it is carried out effective heat management.High intensity to material simultaneously, low-density is had higher requirement.Asphalt base carbon fiber is little with its density, light weight, high-tensile, highly thermally conductive, electric conductivity and extremely low thermal coefficient of expansion cause the attention of researcher.
CN105110809A provides the preparation method of a kind of Graphene modification high heat conductance three-dimensional carbon/carbon composite, with graphene oxide and PAN charcoal cloth as raw material, forms graphene oxide membrane by the method for dipping at carbon fiber surface;In high temperature, hydrogen atmosphere, graphene oxide membrane is reduced into Graphene; carry out CVI densification and graphitization processing subsequently; obtain the high heat conductance three-dimensional carbon/carbon composite that Graphene is modified; thermal conductivity and the bending strength of three-dimensional carbon/carbon composite can be improved, it is achieved prepared by the large scale of three-dimensional high heat conduction carbon/carbon composite, scale.But prepare graphene film due to infusion process and there is the characteristics such as uniformity is poor, be easily peeled, overlay capacity is less so that the range of application of this material is restricted.
Metal-base composites, with metal or alloy as matrix, with high heat conductance or low-expansion second as reinforcement, gives full play to the premium properties of respective constituent element, and metal-base composites, because of its good combination property, becomes the study hotspot of electronic package material.Carbon Fibre Reinforced Metal Matrix Composites can improve specific strength and the specific modulus of metal, reduces the thermal coefficient of expansion of metal.For metal lighter for the metal Chang Xuan of composite, alloy or intermetallic compound, mainly aluminum, copper, titanium, magnesium, their alloy and intermetallic compound.CN101713056A proposes a kind of metal matrix three-dimensional netlike carbon fiber composite material and manufacture method thereof, in this composite, carbon fiber is three-dimensional netlike carbon fiber structure, this three-dimensional netlike carbon fiber structure is to be made up of multilayer carbon nanotube, by three-dimensional network shape carbon fiber structure, binding agent and dispersant are mixed in proportion and stir, it is dried, compression forming, cure process, high temperature sintering, form the preform containing carbon fiber structure, sintering metal (silicon by fusing, magnesium, aluminium alloy in the combination such as copper and nickel) it is immersed in the preform containing carbon fiber structure, solidification i.e. forms machinery, heat conduction, the metal-based carbon fiber composite material that hot expansibility is all excellent.But owing to easily there is electrochemical reaction between carbon fiber and metallic matrix, and carbon fiber is relatively big with the electrode potential difference of metallic matrix, is easily generated galvanic corrosion, thus material easily lost efficacy in the environment of high humidity.
Summary of the invention
It is an object of the invention to overcome the deficiency of prior art and provide that a kind of thermal conductivity is high, thermal coefficient of expansion is low, the composite of lightweight and preparation method.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, and described composite includes matrix material, three-dimensional netlike carbon fiber reinforcement, and wherein said matrix material includes metal material or polymeric material.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, the one in the described metal matrix material a kind of or acid bronze alloy, acieral in metallic copper, aluminum;In described acid bronze alloy, acieral, the content of copper or aluminum is more than or equal to 50%;Polymeric matrix is thermoplastic polymer or thermosetting polymer;Described thermoplastic polymer one in polyethylene, polypropylene, polystyrene, polrvinyl chloride, politef, nylon, Merlon, polymethyl methacrylate, glycol ester, poly terephthalic acid, polyformaldehyde, polyamide, polysulfones;Described thermosetting polymer one in epoxy resin, phenolic resin, Lauxite, amino resins, melmac, unsaturated polyester resin, organic siliconresin, silicone rubber, expanded polystyrene (EPS), polyurethane.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, and the aperture 20 μm-5mm of three-dimensional netlike carbon fiber reinforcement, porosity is 20-95%, and carbon fiber diameter is 3-500 μm.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, deposits high thermal conductivity layer after three-dimensional netlike carbon fiber reinforcement surface Direct precipitation high thermal conductivity layer or surface modification.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, three-dimensional netlike carbon fiber reinforcement surface modification is to deposit layer of metal layer at carbon fiber surface, described metal level one or compound in nickel, copper, tungsten, molybdenum, titanium, silver, chromium, described metal level uses a kind of method in plating, chemical plating, evaporation, magnetron sputtering, chemical gaseous phase deposition, physical vapour deposition (PVD) to deposit.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, the high thermal conductivity layer of deposition one in diamond, Graphene, CNT, Graphene/diamond, CNT/diamond, graphene/carbon nano-tube, diamond/graphene/carbon nano-tube, high thermal conductivity layer thickness is 5-200 μm.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, using CVD technology deposition high thermal conductivity layer, the heated filament auxiliary law being chosen in particular from CVD technology, microwave plasma strengthen at least one in method, DC arc plasma jet, electron cyclotron resonace method, flame combustion process, direct-current discharge method, low pressure radio frequency method, normal-pressure radio-frequency method.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, also comprises high heat conduction particle in the matrix material of composite.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, at least one in diamond, Graphene, CNT, graphene coated diamond microspheres, CNT cladding diamond microsphere, carborundum, boron carbide, aluminium nitride, boron nitride of described high heat conduction particle, described graphene coated diamond microspheres and CNT cladding diamond microsphere all use chemical gaseous phase deposition to obtain.
One surface modification three-dimensional netlike carbon fiber of the present invention strengthens composite, described composite includes following component, and by volume percentage composition forms: matrix material 20-80%, three-dimensional netlike carbon fiber reinforcement 10-70%, high heat conduction particle 0%-30%, each volume components percent and be 100%.
The present invention a kind of surface modification three-dimensional netlike carbon fiber strengthens the preparation method of composite, comprises the steps:
The first step: woven by carbon fiber three-dimensional netted, cleans, dries;
Second step: use the one in carbon fiber surface deposits nickel, copper, tungsten, molybdenum, titanium, silver, chromium of a kind of method in plating, chemical plating, evaporation, magnetron sputtering, chemical gaseous phase deposition, physical vapour deposition (PVD) or complex metal layer;
3rd step: three-dimensional netlike carbon fiber is soaked in nano-diamond powder or Graphene powder or carbon nanotube suspension and carries out ultrasonic vibration plantation seed crystal pretreatment;
4th step: use the high thermal conductivity layer that one or more in three-dimensional netlike carbon fiber surface depositing diamond, Graphene, CNT of chemical vapour deposition technique are compound, obtain three-dimensional network carbon fiber reinforcement;
5th step: three-dimensional network carbon fiber reinforcement, high heat conduction particle are combined with metallic matrix, the Combined Mining a kind of method in powder metallurgy sintered technology or pressureless infiltration, gas infiltration, casting;Described powder metallurgy sintered technology one in cold-rolled sintered, hot pressed sintering, SPS sintering, vacuum-sintering, atmosphere sintering;Or
Three-dimensional network carbon fiber reinforcement, high heat conduction particle are combined with polymeric matrix, a kind of method in Combined Mining dipping curing molding, injection moulding, compressing, injection mo(u)lding, rotation molding, extrusion moulding, laminated into type, flow casting molding.
The present invention a kind of surface modification three-dimensional netlike carbon fiber strengthens the preparation method of composite, when matrix material is metal, is combined with matrix after high thermal conductivity layer surface configuration Modified Membrane again, and Modified Membrane thickness is 5nm-2 μm;At least one in tungsten film, molybdenum film, titanium film, nickel film, chromium film of Modified Membrane, or selected from TiC, WC, Cr7C3, NiC, Mo2At least one in C.
The present invention a kind of surface modification three-dimensional netlike carbon fiber strengthens the preparation method of composite, and in the 4th step, Graphene, CNT, diamond CVD deposition parameter be:
Graphene CVD deposition parameter is: it is 0.5-80% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1200 DEG C, grows air pressure 5-105Pa;
CNT CVD deposition parameter is: it is 5-50% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1300 DEG C, grows air pressure 103-105Pa;
Diamond CVD deposition parameter is: it is 0.5-10% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 600-1000 DEG C, grows air pressure 103-104Pa;
By to applying plasma and induced by magnetic field in CVD deposition stove, and regulate carbon throughput, growth temperature, growth air pressure in real time, realizing Graphene/diamond, CNT/diamond, graphene/carbon nano-tube, the CVD deposition of diamond/graphene/carbon nano-tube, deposition parameter is:
Graphene CVD deposition parameter is: it is 0.5-80% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1200 DEG C, grows air pressure 5-105Pa;Plasma electric current density 0-50mA/cm2;In deposition region, magnetic field intensity is that 100 Gausses are to 30 teslas.
CNT CVD deposition parameter is: it is 5-50% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1300 DEG C, grows air pressure 103-105Pa;Plasma electric current density 0-30mA/cm2;In deposition region, magnetic field intensity is that 100 Gausses are to 30 teslas.
Diamond CVD deposition parameter is: it is 0.5-10% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 600-1000 DEG C, grows air pressure 103-104Pa。
One surface modification three-dimensional network carbon fiber reinforced metal base of the present invention or polymer matrix composite, also rare earth element can be added in metallic matrix, as one or more in the rare earth elements such as Sc, Y, Ce strengthen metal and three-dimensional network carbon fiber reinforcement, the binding ability of high heat conduction particle;Also coupling agent can be added in polymer to change hydrophilic or the organophilic of polymer so that polymer is connected by coupling agent with reinforcement, to improve binding ability.
The present invention is by working out the three-dimensional carbon fiber reinforcement of different pore size, by diamond, CNT or graphene film chemical gaseous phase depositing homogeneous, fine and close after surface preparation, it is combined with matrix material after CVD surface modification, it is thus achieved that with the Carbon Fibre Reinforced Metal Matrix Composites of three dimensional skeletal structure.Through surface modification, reduce potential difference between metal and carbon fiber, effectively alleviate the electrochemical corrosion of material, improve the adaptive faculty of material, the most surface-modified three-dimensional carbon fiber defines three-dimensional passage of heat continuously in the composite, drastically increases the heat conductivility of composite, meanwhile, carbon fiber spatial distribution in matrix material also can play the mechanical property improving composite, reduces the function of its density and thermal coefficient of expansion.Regulate and control its thermal coefficient of expansion and mechanics, thermal property also by addition zero dimension reinforced particulate simultaneously.
Detailed description of the invention
Technical scheme is further described below by specific embodiment.
The embodiment of the present invention is carried out by following technique or step:
The composite of preparation uses laser conductometer to carry out thermal conductivity measurement.
Embodiment one: diamond modification weaving carbon fiber reinforced aluminum matrix composites
Comprise the following steps:
(1) 3 D weaving carbon fiber (aperture is 500 μm, and porosity is 90%) is placed in ultrasonic cleaning in acetone soln;
(2) using magnetically controlled sputter method to sputter W film layer on 3 D weaving carbon fiber surface, wherein W film thickness is 150nm;Use HF CVD depositing diamond film, deposition process parameters: heated filament distance 6mm, substrate temperature 800 DEG C, hot-wire temperature 2200 DEG C, deposition pressure 3KPa, CH4/H2Volume flow ratio 1:99, obtains diamond film thickness 120 μm;Use magnetically controlled sputter method belt carcass diamond three-dimensional network skeleton surface sputter Mo/Cu composite film, wherein Mo film thickness be 50nm, Cu film thickness be 100nm;
(3) weaving carbon fiber of the surface modification obtained in (2) is put in mould, fine aluminium is heated in crucible simultaneously and be melted to 730 DEG C, melt is poured in mould, uses the pressure of hydraulic press pressure 60Mpa, force aluminum or aluminum alloy melt to be infiltrated into the gap location of diamond wire in skeleton, keep pressure 15 seconds, cooling and demolding, takes out composite, and the thermal conductivity of composite is 552W/mK, tensile strength 561MPa, bending strength is 53MPa.
Embodiment two: diamond/Graphene modification weaving carbon fiber reinforced PMMA composite
Comprise the following steps:
(1) 3 D weaving carbon fiber (aperture is 300 μm, and porosity is 80%) is placed in ultrasonic cleaning in acetone soln;
(2) HF CVD depositing diamond film, deposition process parameters: heated filament distance 6mm, substrate temperature 800 DEG C, hot-wire temperature 2200 DEG C, deposition pressure 3KPa, CH are used4/H2Volume flow ratio 1:99, obtains diamond film thickness 200 μm;Use plasma-assisted chemical vapour deposition method at diamond surface growth in situ graphene film layer, deposition parameter: H2/CH4Atmosphere, CH4Gas mass flow percentage ratio is 10%, and growth temperature is 900 DEG C, grows air pressure 5 × 105Pa, plasma electric current density 20mA/cm2, in deposition region, magnetic field intensity is 200 Gausses, and the time is 20min;Then using vacuum evaporation to be plated in its surface one layer of W film of deposition, W film thickness is 100nm;
(3) dipping solidification is used to be combined: a) to prepare PMMA (poly-methyl methacrylate vinegar) precursor liquid: weigh 20gPMMA, it is mixed with organic solvents, chloroform, it is stirred vigorously 2h to PMMA to be completely dissolved, forms the chloroformic solution that PMMA mass percent is 10%;B) mixing: put in mould by diamond/Graphene modification weaving carbon fiber, then according to volume ratio 1:5 instills the chloroformic solution of PMMA so that it is infiltration also fully infiltrates diamond/Graphene modification weaving carbon fiber, obtains mixture;C) heat, solidify: above-mentioned mixture is placed in vacuum drying oven and steams chloroform solvent in 60 DEG C of vacuum drying 24h, it is then heated to 110 DEG C, after insulation 1h, it is down to room temperature, finally give the diamond/Graphene modification weaving carbon fiber/PMMA composite with three-dimensional network framing structure, the thermal conductivity of composite is 252W/mK, tensile strength 274MPa, and bending strength is 35MPa.
Embodiment three: diamond modification weaving carbon fiber strengthens aluminium alloy based composites
Comprise the following steps:
(1) 3 D weaving carbon fiber (aperture is 150 μm, and porosity is 60%) is placed in ultrasonic cleaning in acetone soln;
(2) using evaporation coating technology to sputter Mo film layer on belt carcass diamond three-dimensional network skeleton surface, wherein Mo film thickness is 50nm;Use HF CVD depositing diamond film, deposition process parameters: heated filament distance 6mm, substrate temperature 750 DEG C, hot-wire temperature 2200 DEG C, deposition pressure 3KPa, CH4/H2Volume flow ratio 1:99, obtains diamond film thickness 80 μm;Use magnetically controlled sputter method belt carcass diamond three-dimensional network skeleton surface sputter Mo/Ni/Cu composite film, wherein Mo film thickness be 50nm, Ni film thickness be 50nm, Cu film thickness be 20nm;
(3) weaving carbon fiber of the surface modification obtained in (2) is put in mould; 2 times of Al-Si alloys of weaving carbon fiber skeleton volume are placed on above skeleton; wherein the mass content of Si is 15%; it is then placed in heating furnace; 900 DEG C of insulation 30min under high pure nitrogen is protected, obtain diamond modification weaving carbon fiber and strengthen aluminium alloy based composites, and the thermal conductivity of composite is 572W/mK; tensile strength 587MPa, bending strength is 56MPa.
Embodiment four: diamond/carbon nanotube modification weaving carbon fiber strengthens Cu-base composites
Comprise the following steps:
(1) 3 D weaving carbon fiber (aperture is 250 μm, and porosity is 70%) is placed in ultrasonic cleaning in acetone soln;
(2) using evaporation coating technology to sputter Mo film layer on belt carcass diamond three-dimensional network skeleton surface, wherein Mo film thickness is 50nm;Use HF CVD depositing diamond film, deposition process parameters: heated filament distance 6mm, substrate temperature 750 DEG C, hot-wire temperature 2200 DEG C, deposition pressure 3KPa, CH4/H2Volume flow ratio 1:99, obtains diamond film thickness 500 μm;Use magnetron sputtering technique to deposit the thick nickel film of 5nm on diamond film surface, then use HF CVD to be deposited on diamond film surface catalysis growth CNT woods, depositing operation: CH4/H2Carbonaceous gas mass flow percentage ratio is 10.0%, and growth temperature is 800 DEG C, grows air pressure 104Pa, plasma electric current density 10mA/cm2, in deposition region, magnetic field intensity is 30 teslas, sedimentation time 40min.Using electro-plating method to electroplate Cu film CNT woods again, wherein Cu film thickness is 300nm;
(3) weaving carbon fiber of the surface modification obtained in (2) is put in mould; 2 times of pure Cu blocks of weaving carbon fiber skeleton volume are placed on above skeleton; it is then placed in heating furnace; 1250 DEG C of insulation 30min under high pure nitrogen is protected; obtain diamond/carbon nanotube modification weaving carbon fiber and strengthen Cu-base composites; the thermal conductivity of composite is 1052W/mK, tensile strength 679MPa, and bending strength is 78MPa.
Embodiment five: diamond/graphene/carbon nano-tube modification weaving carbon fiber reinforced epoxy based composites comprises the following steps:
(1) 3 D weaving carbon fiber (aperture is 350 μm, and porosity is 50%) is placed in ultrasonic cleaning in acetone soln;
(2) using evaporation coating techniques to deposit one layer of Mo film on belt carcass diamond three-dimensional network skeleton surface, wherein Mo film thickness is 50nm;Use HF CVD depositing diamond film, deposition process parameters: heated filament distance 6mm, substrate temperature 750 DEG C, hot-wire temperature 2200 DEG C, deposition pressure 3KPa, CH4/H2Volume flow ratio 1:99, obtains diamond film thickness 80 μm;Use magnetron sputtering technique to deposit the thick cobalt film of 5nm on diamond film surface, then use HF CVD to be deposited on diamond film surface carbon nanotube woods, depositing operation: CH4/H2Carbonaceous gas mass flow percentage ratio is 10.0%;Growth temperature is 800 DEG C, grows air pressure 104Pa;Plasma electric current density 10mA/cm2;In deposition region, magnetic field intensity is 200 Gausses, sedimentation time 1h.Using electro-plating method to electroplate Cu film CNT woods again, wherein Cu film thickness is 300nm;
(3) segment by mass parts: epoxy resin 40 parts, diamond/Graphene composite heat-conducting granule 20 parts, coupling agent 0.8 part, antioxidant 0.6 part, the ratio batch mixing of processing aid 3 parts;The weaving carbon fiber of the surface modification obtained in (2) is put in mould, the batch mixings such as mixed epoxy resin is placed in above modified weaving carbon fiber, closes die cavity with the vacuum bag sealing location.Then use a baking oven for heating, melt resin.Solidifying after resin permeable fiber layer under vacuum, curing process is 130 DEG C/1h+150 DEG C/1h+180 DEG C/2h+200 DEG C/2h+220 DEG C/6h.Room temperature is naturally cooled to after having solidified.Being removed from the molds composite sample, the thermal conductivity of composite is 282W/mK.Tensile strength 261MPa, bending strength is 30MPa.
Embodiment six: diamond modification weaving carbon fiber strengthens Cu-base composites
Comprise the following steps:
(1) 3 D weaving carbon fiber (aperture is 300 μm, and porosity is 70%) is placed in ultrasonic cleaning in acetone soln;
(2) using magnetically controlled sputter method to sputter W film layer on 3 D weaving carbon fiber surface, wherein W film thickness is 250nm;Use HF CVD depositing diamond film, deposition process parameters: heated filament distance 6mm, substrate temperature 800 DEG C, hot-wire temperature 2200 DEG C, deposition pressure 3KPa, CH4/H2Volume flow ratio 1:99, obtains diamond film thickness 520 μm;Use magnetically controlled sputter method diamond modification weaving carbon fiber skeleton surface sputter Mo/Cu composite film, wherein Mo film thickness be 50nm, Cu film thickness be 100nm;
(3) weaving carbon fiber of the surface modification obtained in (2) is put in mould, fine copper is heated in crucible simultaneously and be melted to 1140 DEG C, by in fine copper melt cast to mould, use the pressure of hydraulic press pressure 60Mpa, copper melts is forced to be infiltrated into the gap location of diamond modification weaving carbon fiber skeleton, keep pressure 15 seconds, cooling and demolding, take out composite diamond modification weaving carbon fiber and strengthen Cu-base composites, thermal conductivity is 552W/mK, tensile strength 940MPa, bending strength is 49MPa.
Embodiment seven: Graphene modification weaving carbon fiber reinforced aluminum matrix composites
Comprise the following steps:
(1) 3 D weaving carbon fiber (aperture is 400 μm, and porosity is 75%) is placed in ultrasonic cleaning in acetone soln;
(2) using magnetically controlled sputter method to sputter W film layer on 3 D weaving carbon fiber surface, wherein W film thickness is 150nm;Use hot-wall cvd deposited graphite alkene film, particularly as follows: be heated to 950 DEG C (in heating process, H2 and Ar flow velocity is respectively 200 and 500mL/min, and programming rate is 33 DEG C/min) in the atmosphere of H2 and Ar, treat that furnace temperature rises to 950 DEG C of after-baking 10min;Heat treatment is passed through the mixed gas (gas flow rate is respectively methane 5mL/min, hydrogen 200mL/min and argon 500mL/min) of CH4, H2 and Ar after completing, start to grow Graphene, 100 DEG C/min of rate of cooling, obtaining graphene film average thickness is 1.7nm, i.e. obtains graphene coated carbon fiber skeleton;
(3) weaving carbon fiber that the Graphene obtained in (2) is modified is put in mould, fine aluminium is heated in crucible simultaneously and be melted to 730 DEG C, melt is poured in mould, uses the pressure of hydraulic press pressure 60Mpa, force aluminum or aluminum alloy melt to be infiltrated into the gap location of diamond wire in skeleton, keep pressure 15 seconds, cooling and demolding, takes out composite, and the thermal conductivity of composite is 637W/mK, tensile strength 594MPa, bending strength is 60MPa.
Embodiment eight: CNT coated graphite alkene modification weaving carbon fiber strengthens silicon rubber composite material
Comprise the following steps:
(1) 3 D weaving carbon fiber (aperture is 400 μm, and porosity is 75%) is placed in ultrasonic cleaning in acetone soln;
(2) using magnetically controlled sputter method to sputter W film layer on 3 D weaving carbon fiber surface, wherein W film thickness is 150nm;Use hot-wall cvd deposited graphite alkene film, particularly as follows: at H2With the atmosphere of Ar is heated to 950 DEG C of (H in heating process2Being respectively 200 and 500mL/min with Ar flow velocity, programming rate is 33 DEG C/min), treat that furnace temperature rises to 950 DEG C of after-baking 10min;Heat treatment is passed through CH after completing4、H2Mixed gas (gas flow rate is respectively methane 5mL/min, hydrogen 200mL/min and argon 500mL/min) with Ar, start to grow Graphene, 100 DEG C/min of rate of cooling, obtaining graphene film average thickness is 1.7nm, i.e. obtains graphene coated carbon fiber skeleton;Magnetron sputtering deposits one layer of nickel at graphenic surface again, then utilize plasma-assisted chemical vapour deposition at graphenic surface catalytic growth CNT, the lower orientation of growth controlling CNT of effect under extra electric field simultaneously, make them vertical and graphenic surface forms CNT woods, obtaining the strengthening layer of CNT coated graphite alkene film, deposition parameter is: methane, hydrogen mass flow percentage ratio is 10%;Growth temperature is 600 DEG C, grows air pressure 3000Pa;Plasma electric current density 5mA/cm2;In deposition region, magnetic field intensity is 500 Gausses, obtains CNT coated graphite olefinic carbon fiber reinforcement;
(3) instill silicone rubber precursor solution according to volume ratio 1:2 so that it is infiltration fully infiltration CNT coated graphite olefinic carbon fiber reinforcement, obtain mixture;Above-mentioned mixture is carried out application of vacuum 2h, remove solvent therein and bubble, silicone rubber precursor liquid is made preferably to be filled in the hole of carbon fiber skeleton, it is heated to 80 DEG C, and heat preservation solidification 4h, obtaining CNT coated graphite alkene modification weaving carbon fiber and strengthen silicon rubber composite material, heat conductivity is respectively 193W/ (m K), tensile strength 278MPa, bending strength is 28MPa.
Knowable to the thermal conductivity obtained from above example and mechanical performance data, surface modification three-dimensional netlike carbon fiber prepared by the present invention strengthens Metal Substrate or the thermal conductivity of polymer matrix composite, tensile strength, bending strength all obtains tremendous increase, thermal conductivity is up to 1052W/mK, tensile strength is up to 679MPa, bending strength is up to 78MPa, composite prepared by the present invention makes surface reinforced three-dimensional netlike carbon fiber define three-dimensional skeleton continuously in the composite, drastically increase the heat conductivility of composite, meanwhile, carbon fiber spatial distribution in matrix material also can play the mechanical property improving composite, reduce the function of its density and thermal coefficient of expansion.Simultaneously by adding zero dimension reinforced particulate its thermal coefficient of expansion of energy Effective Regulation and mechanics, thermal property.This composite has the most excellent combination property relative to traditional Metal Substrate or polymer matrix composite at aspects such as mechanics, calorifics, electricity, calorifics and high-strength lights.
Claims (13)
1. a surface modification three-dimensional netlike carbon fiber strengthens composite, it is characterised in that: described composite includes matrix material, three-dimensional netlike carbon fiber reinforcement, and wherein said matrix material includes metal material or polymeric material.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 1 strengthens composite, it is characterised in that: the one in the described metal matrix material a kind of or acid bronze alloy, acieral in metallic copper, aluminum;In described acid bronze alloy, acieral, the content of copper or aluminum is more than or equal to 50%;Polymeric matrix is thermoplastic polymer or thermosetting polymer;Described thermoplastic polymer one in polyethylene, polypropylene, polystyrene, polrvinyl chloride, politef, nylon, Merlon, polymethyl methacrylate, glycol ester, poly terephthalic acid, polyformaldehyde, polyamide, polysulfones;Described thermosetting polymer one in epoxy resin, phenolic resin, Lauxite, amino resins, melmac, unsaturated polyester resin, organic siliconresin, silicone rubber, expanded polystyrene (EPS), polyurethane.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 2 strengthens composite, it is characterised in that: the aperture 20 μm-5mm of three-dimensional netlike carbon fiber reinforcement, porosity is 20-95%, and carbon fiber diameter is 3-500 μm.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 3 strengthens composite, it is characterised in that: after three-dimensional netlike carbon fiber reinforcement surface Direct precipitation high thermal conductivity layer or surface modification, deposit high thermal conductivity layer.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 4 strengthens composite, it is characterized in that: three-dimensional netlike carbon fiber reinforcement surface modification is to deposit layer of metal layer at carbon fiber surface, described metal level is selected from the one in nickel, copper, tungsten, molybdenum, titanium, silver, chromium or complex metal layer, and described metal level uses a kind of method in plating, chemical plating, evaporation, magnetron sputtering, chemical gaseous phase deposition, physical vapour deposition (PVD) to deposit.
6. strengthen composite according to a kind of surface modification three-dimensional netlike carbon fiber described in claim 4 or 5, it is characterized in that: the high thermal conductivity layer of deposition one in diamond, Graphene, CNT, Graphene/diamond, CNT/diamond, graphene/carbon nano-tube, diamond/graphene/carbon nano-tube, high thermal conductivity layer thickness is 5-200 μm.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 6 strengthens composite, it is characterized in that: using CVD technology deposition high thermal conductivity layer, the heated filament auxiliary law being chosen in particular from CVD technology, microwave plasma strengthen at least one in method, DC arc plasma jet, electron cyclotron resonace method, flame combustion process, direct-current discharge method, low pressure radio frequency method, normal-pressure radio-frequency method.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 7 strengthens composite, it is characterised in that: the matrix material of composite also includes high heat conduction particle.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 8 strengthens composite, it is characterized in that: at least one in diamond, Graphene, CNT, graphene coated diamond microspheres, CNT cladding diamond microsphere, carborundum, boron carbide, aluminium nitride, boron nitride of described high heat conduction particle, described graphene coated diamond microspheres and CNT cladding diamond microsphere all use chemical gaseous phase deposition to obtain.
A kind of surface modification three-dimensional netlike carbon fiber the most according to claim 9 strengthens composite, it is characterized in that: described composite includes following component, by volume percentage composition composition: matrix material 20-80%, three-dimensional netlike carbon fiber reinforcement 10-70%, high heat conduction particle 0-30%, each volume components percent and be 100%.
11. a kind of surface modification three-dimensional netlike carbon fibers according to claim 10 strengthen the preparation method of composite, comprise the steps:
The first step: woven by carbon fiber three-dimensional netted, cleans, dries;
Second step: use the one in carbon fiber surface deposits nickel, copper, tungsten, molybdenum, titanium, silver, chromium of a kind of method in plating, chemical plating, evaporation, magnetron sputtering, chemical gaseous phase deposition, physical vapour deposition (PVD) or complex metal layer;
3rd step: three-dimensional netlike carbon fiber is soaked in nano-diamond powder or Graphene powder or carbon nanotube suspension and carries out ultrasonic vibration plantation seed crystal pretreatment;
4th step: use the high thermal conductivity layer that one or more in three-dimensional netlike carbon fiber surface depositing diamond, Graphene, CNT of chemical vapour deposition technique are compound, obtain three-dimensional network carbon fiber reinforcement;
5th step: three-dimensional network carbon fiber reinforcement, high heat conduction particle are combined with metallic matrix, the Combined Mining a kind of method in powder metallurgy sintered technology or pressureless infiltration, gas infiltration, casting;Described powder metallurgy sintered technology one in cold-rolled sintered, hot pressed sintering, SPS sintering, vacuum-sintering, atmosphere sintering;Or
Three-dimensional network carbon fiber reinforcement, high heat conduction particle are combined with polymeric matrix, a kind of method in Combined Mining dipping curing molding, injection moulding, compressing, injection mo(u)lding, rotation molding, extrusion moulding, laminated into type, flow casting molding.
12. a kind of surface modification three-dimensional netlike carbon fibers according to claim 11 strengthen the preparation method of composite, it is characterised in that: when matrix material is metal, it is combined with matrix again after high thermal conductivity layer surface configuration Modified Membrane;At least one in tungsten film, molybdenum film, titanium film, nickel film, chromium film of Modified Membrane, or selected from TiC, WC, Cr7C3, NiC, Mo2At least one in C.
13. a kind of surface modification three-dimensional netlike carbon fibers according to claim 11 strengthen the preparation method of composites, and in the 4th step, Graphene, CNT, diamond CVD deposition parameter be:
Graphene CVD deposition parameter is: it is 0.5-80% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1200 DEG C, grows air pressure 5-105Pa;
CNT CVD deposition parameter is: it is 5-50% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1300 DEG C, grows air pressure 103-105Pa;Before CNT CVD deposition, a kind of method in plating, chemical plating, evaporation, magnetron sputtering, chemical gaseous phase deposition, physical vapour deposition (PVD) is used to deposit nickel, copper, the one of cobalt or composite catalytic layer at deposition surface;
Diamond CVD deposition parameter is: it is 0.5-10% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 600-1000 DEG C, grows air pressure 103-104Pa;
By to applying plasma and induced by magnetic field in CVD deposition stove, and regulate carbon throughput, growth temperature, growth air pressure in real time, realizing Graphene/diamond, CNT/diamond, graphene/carbon nano-tube, the CVD deposition of diamond/graphene/carbon nano-tube, deposition parameter is:
Graphene CVD deposition parameter is: it is 0.5-80% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1200 DEG C, grows air pressure 5-105Pa;Plasma electric current density 0-50mA/cm2;In deposition region, magnetic field intensity is that 100 Gausses are to 30 teslas;
CNT CVD deposition parameter is: it is 5-50% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 400-1300 DEG C, grows air pressure 103-105Pa;Plasma electric current density 0-30mA/cm2;In deposition region, magnetic field intensity is that 100 Gausses are to 30 teslas;
Diamond CVD deposition parameter is: it is 0.5-10% that carbonaceous gas accounts for all gas mass flow percentage ratio in stove;Growth temperature is 600-1000 DEG C, grows air pressure 103-104Pa。
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