CN107010613B - The preparation method of conductive magneto-conductive nano-functional material - Google Patents

The preparation method of conductive magneto-conductive nano-functional material Download PDF

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CN107010613B
CN107010613B CN201710096475.9A CN201710096475A CN107010613B CN 107010613 B CN107010613 B CN 107010613B CN 201710096475 A CN201710096475 A CN 201710096475A CN 107010613 B CN107010613 B CN 107010613B
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carbon nano
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CN107010613A (en
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孟龙月
李东浩
王晨迪
邹依琳
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Yanbian University
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Abstract

A kind of preparation method of conductive magneto-conductive nano-functional material, comprising: substrate is pre-processed;Carbon nano-fiber is grown in substrate surface using chemical vapour deposition technique;The CO of 20cc/min-300cc/min is passed through under the conditions of 400 DEG C -1100 DEG C of temperature2Gas 10min-180min, or it is passed through the plasma gas 1min-30min of 10cc/min-300cc/min under normal temperature conditions, surface-functionalized processing is carried out to carbon nano-fiber;Magnetic nanoparticle dispersion solution is attached to carbon nano-fiber surface.The present invention carries out surface-functionalized processing to carbon nano-fiber using gas, can uniformly, different oxygen-containing, nitrogen-containing functional group are comprehensively introduced on hydrophobic carbon nano-fiber surface, the surface energy for improving carbon nano-fiber, increases the binding site of magnetic nanoparticle.Because carbon nano-fiber is grown directly upon substrate surface, stable structure is not easily to fall off, carbon nano-fiber ordered arrangement, not only has bigger specific surface area and three-dimensional porous structure, but also be easier to separate and recover, and nano particle can be overcome to be easy the shortcomings that reuniting.

Description

The preparation method of conductive magneto-conductive nano-functional material
Technical field
The present invention relates to magnetic conductive nanocomposites, more particularly to the preparation side of conductive magneto-conductive nano-functional material Method.
Background technique
In recent years as research hotspot electric magnetoconductive composite material be a kind of structural and functional properties combined double property it is compound Material, because having magnetic and electric conductivity double grading, sensing technology, nonlinear optical material, electromagnetic shielding, radar absorption, Magnetic recording etc. has broad application prospects.
The electric magnetoconductive composite material studied at present mainly includes that magnetic particle-conductive polymer composite, carbon system are multiple Conductive magneto-conductive material, metal-oxide iron composite material etc. are closed, preparation method mainly includes blending method, in-situ synthesized, gathers in situ Legal, chemical-electrical plating method etc., wherein the preparation condition of in-situ synthesized is harsher, is readily incorporated impurity, reduces product purity; Chemical-electrical plating method increases the density of material, and the pollution of electroplating effluent is also that cannot be neglected;Blending method is easy to operate, still Nanoparticle is easy to reunite, it is difficult to be uniformly dispersed, the structure of combination product has uncertainty.
With the development of society, propose increasingly higher demands to electric magnetoconductive composite material, " thickness is thin, light weight, Frequency range is wide, intensity is high " be novel conductive composite magnetic material Main Trends of The Development.Magnetic nanoparticle is a kind of intelligent Nano material both has property specific to nano material, such as small-size effect, skin effect, quantum size effect, maroscopic quantity Sub- tunnel-effect etc., and there is good magnetic conductance tropism, superparamagnetism, quasi-enzyme catalytic characteristic and biocompatibility etc., Ke Yi Assemble under stationary magnetic field and position, the electromagnetic wave absorption heat production under alternating magnetic field, therefore is led magnetic nanoparticle as conduction Permeability magnetic material in magnetic composite material is with a wide range of applications.
Carbon nano-fiber (CNFs) refers to the carbon fiber with nanoscale, can be divided into carbon nanotubes i.e. according to its architectural characteristic Hollow Nano carbon fiber and solid carbon nanofiber are quasi-one-dimensional materials, crystalline orientation degree with higher and are preferably led Electricity and heating conduction, as the carrier of magnetic nanoparticle, available light weight, thickness is thin, large specific surface area leads Electric composite magnetic material.However, current carbon nano-fiber materials are mostly powdered, fibre length is shorter and arranges mixed and disorderly nothing Chapter, as the carrier of magnetic nanoparticle, obtained nanocomposite can be too strong because of the too small adsorptivity of particle, generates easy Reunite, the disadvantage that dispersion is uneven, also, because of these disadvantages, when being applied to product, needs to add dispersing agent, adhesive Equal auxiliary agents, not only at high cost, not environmentally, obtained coating is also easy to fall off.
Summary of the invention
Based on this, the object of the present invention is to provide a kind of preparation methods of conductive magneto-conductive nano-functional material.
A kind of preparation method of conductive magneto-conductive nano-functional material, comprising:
Substrate is pre-processed;
Carbon nano-fiber is grown in the substrate surface using chemical vapour deposition technique;
The CO of 20cc/min-300cc/min is passed through under the conditions of 400 DEG C -1100 DEG C of temperature2Gas 10min- 180min, or it is passed through the plasma gas 1min-30min of 10cc/min-300cc/min under normal temperature conditions, to the carbon Nanofiber carries out surface-functionalized processing;And
Magnetic nanoparticle dispersion solution is attached to carbon nano-fiber surface.
The magnetic nanoparticle is ferroferric oxide nano granules in one of the embodiments,.
The plasma gas is the plasma gas of nitrogen, oxygen or air in one of the embodiments,.
In one of the embodiments, the substrate be plate, it is netted, tubulose, woven fabric-like or Filamentous.
In one of the embodiments, the substrate be selected from carbon fiber, glass fibre, inorganic oxide fibres, pencil-lead, One of capillary and wire.
The step that magnetic nanoparticle dispersion solution is attached to carbon nano-fiber surface in one of the embodiments, Suddenly include by surface growth have the carbon nano-fiber the substrate be immersed in 60 DEG C -80 DEG C magnetic nanoparticle dispersion it is molten In liquid, or including in the carbon nano-fiber surface, doing magnetic nanoparticle dispersion solution spraying in 60 DEG C of -80 DEG C of vacuum It is dry.
The process in substrate surface growth carbon nano-fiber further includes catalyst solution in one of the embodiments, Preparation process, the catalyst solution is the sol-gel solution containing catalyst.
More preferably, the catalyst in the catalyst solution is selected from the alloy of iron, nickel, cobalt metal or any combination thereof, institute The colloidal sol stated in catalyst solution is selected from silica, titanium dioxide, aluminium oxide, silica/alumina complex or dioxy SiClx/titanium dioxide complex colloidal sol.
The catalyst solution passes through mixing silica precursor, titanium dioxide forerunner in one of the embodiments, Body or alumina precursor, metal nitrate, surfactant, distilled water, ethyl alcohol and hydrochloric acid and obtain.More preferably, the gold Genus nitrobacter is nickel nitrate;The surfactant is polyoxyethylene polyoxypropylene copolymer p 123, F127 or chitosan (molecule Amount is 5-30 ten thousand);The silica precursor is one of methyl orthosilicate, ethyl orthosilicate, positive silicic acid propyl ester or more The mixing of kind;The TiO 2 precursor is sour four fourth vinegar by the emperor himself;The alumina precursor is aluminum sulfate or aluminum nitrate.
The present invention carries out surface-functionalized processing to carbon nano-fiber using gas, can uniformly, comprehensively in hydrophobicity Carbon nano-fiber surface introduce different oxygen-containing, nitrogen-containing functional group, improve carbon nano-fiber surface can, increase magnetic Nano The binding site of particle, and can prevent from carrying out falling off for carbon nano-fiber caused by surface-functionalized processing using solution.Cause The carbon nano-fiber of modified by magnetic nanoparticles is grown directly upon substrate surface, and stable structure is not easily to fall off, and carbon nano-fiber has Sequence arrangement, not only has bigger specific surface area and three-dimensional porous structure, but also be easier to separate and recover, can overcome nano particle It is easy the shortcomings that reuniting.
By conductive magneto-conductive nano-functional material obtained by the above method, the electric conductivity and magnetism for having carbon nano-fiber concurrently are received The orientation in electric field, magnetic field may be implemented in the magnetism of rice grain, and not only density is low, and can come by adjusting each technological parameter The electromagnetic parameter for adjusting material, makes it have higher saturation magnetization, good physical and chemical stability and corrosion resistance Can, it is expected to be used widely in terms of sound-absorbing inhales wave.In addition, the electromagnetism separate type performance of the composite material be expected to chemistry, It is with important application prospects in terms of biology, medicine, environmental area.
Detailed description of the invention
Fig. 1 is the schematic diagram for preparing the conductive magneto-conductive nano-functional material in the present invention on different substrates;
Fig. 2 is the scanning electron microscope (SEM) photograph of the carbon fiber before and after growing carbon nano-fiber;
Fig. 3 is magnetic before and after preparing the conductive magneto-conductive nano-functional material in the present invention on fiberglass woven cloth Property comparing result.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right with reference to the accompanying drawings and embodiments The preparation method of conductive magneto-conductive nano-functional material of the invention is further elaborated.It should be appreciated that described herein Specific examples are only used to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of preparation method of conductive magneto-conductive nano-functional material, comprising:
Substrate 10 is pre-processed;
Carbon nano-fiber 12 is grown on 10 surface of substrate using chemical vapour deposition technique;
The CO of 20cc/min-300cc/min is passed through under the conditions of 400 DEG C -1100 DEG C of temperature2Gas 10min- 180min, or it is passed through the plasma gas 1min-30min of 10cc/min-300cc/min under normal temperature conditions, to carbon nanometer Fiber 12 carries out surface-functionalized processing;And
Magnetic nanoparticle dispersion solution is attached to 12 surface of carbon nano-fiber.
The substrate used in the above method can be existing base material, can be selected from carbon fiber, glass fibre (it is hollow or Solid glass fiber), inorganic oxide fibres (alumina fibre, silicon oxide fibre etc.), wire (stainless steel wire, iron wire, tungsten Silk, titanium silk etc.), pencil-lead, capillary etc., substrate can be plate, netted, tubulose, woven fabric-like or Filamentous, diameter and size It can be unfettered.
The magnetic nanoparticle 14 can be the magnetic nano particle of any band, such as iron, cobalt, nickel monomer or oxidation Object magnetic nanoparticle.
The preprocessing process of above-mentioned substrate may include: ultrasonic treatment, heat treatment, acidification etc., to remove substrate table The organo-functional group in face improves the hydrophily of substrate surface, increases substrate surface to the contact site of hydrophilic compounds.
The above-mentioned process for growing carbon nano-fiber in substrate surface using chemical vapour deposition technique, comprising: containing catalysis Substrate is impregnated in the catalyst solution of agent and surfactant, is calcined after dry and is removed surfactant, divides catalyst uniformly Cloth is in the substrate surface;The substrate that surface is evenly distributed with catalyst layer is heated up under inert gas atmosphere, is passed through hydrogen Reducing catalyst then passes to carbon-source gas (acetylene, methane, ethylene, ethyl alcohol etc.) and carries out chemical vapour deposition reaction, carbon is made to receive Rice fiber growth is in substrate surface.
In the embodiment of the present invention, using the catalyst solution containing catalyst and surfactant, especially sol-gel Solution, as doping iron, nickel, cobalt metal or alloy catalyst meso-porous titanium dioxide silica solution, the purpose is to by using mesoporous two Silica sol makes catalyst be dispersed in substrate surface as catalyst carrier, and obtained carbon nano-fiber, which has, to intersect The structure of seam arrangement, large specific surface area, stability is good, large amount of adsorption, and can reduce largely using and subtract for catalyst Few unnecessary post-processing process.
More preferably, the catalyst in the catalyst solution is selected from the alloy of iron, nickel, cobalt metal or any combination thereof, institute The colloidal sol stated in catalyst solution is selected from silica, titanium dioxide, aluminium oxide, silica/alumina complex or dioxy SiClx/titanium dioxide complex colloidal sol.
The catalyst solution passes through mixing silica precursor, titanium dioxide forerunner in one of the embodiments, Body or alumina precursor, metal nitrate, surfactant, distilled water, ethyl alcohol and hydrochloric acid and obtain.More preferably, the gold Genus nitrobacter is nickel nitrate;The surfactant is polyoxyethylene polyoxypropylene copolymer p 123, F127 or chitosan (molecule Amount is 5-30 ten thousand);The silica precursor is one of methyl orthosilicate, ethyl orthosilicate, positive silicic acid propyl ester or more The mixing of kind;The TiO 2 precursor is sour four fourth vinegar by the emperor himself;The alumina precursor is aluminum sulfate or aluminum nitrate.
Substrate should be immersed in the sufficiently long time in catalyst solution, and catalyst is made to be evenly coated in substrate surface.From catalysis The substrate is calcined after taking out substrate in agent solution, to completely remove the surfactant as template, keeps catalyst uniform It is distributed in substrate surface.
It, can be at high temperature using carbon dioxide gas or sharp at normal temperature after to the end of chemical vapour deposition reaction Surface-functionalized processing is carried out to growth and the carbon nano-fiber of substrate surface with the plasma gas of nitrogen, oxygen, air etc.. In one embodiment, the CO of 20cc/min-300cc/min is passed through under the conditions of 400 DEG C -1100 DEG C of temperature2Gas 10min- 180min introduces oxygen-containing functional group (carboxyl, carbonyl, hydroxyl etc.) on carbon nano-fiber surface.In another embodiment, in room temperature Under the conditions of be passed through the plasma gas 1min-30min of 10cc/min-300cc/min, carbon nano-fiber is carried out surface-functionalized Processing, the plasma gas of use can be the plasma gas of nitrogen, oxygen or air, introduce and contain on carbon nano-fiber surface Oxygen, nitrogenous (amino, pyridine etc.) functional group.When carrying out gas surface treatment, the gas flow being passed through is different, and the processing time is not Together, it changes in the functional group of carbon nano-fiber Surface Creation.
The present invention carries out surface-functionalized processing to carbon nano-fiber using gas, can uniformly, comprehensively in hydrophobicity Carbon nano-fiber surface introduce different oxygen-containing, nitrogen-containing functional group, improve carbon nano-fiber surface can, increase magnetic Nano The binding site of particle, so as to make magnetic nanoparticle be integrated to carbon Nanowire by the modes such as simply impregnating, spraying Dimension table face, and can prevent from carrying out falling off for carbon nano-fiber caused by surface-functionalized processing using solution, maintain carbon to receive The primary morphology that rice fiber is grown in substrate surface.
By the modes such as impregnating, spraying, dispersed using the magnetic nanoparticle of different sizes (such as 10nm-500nm) molten Liquid makes magnetic nanoparticle be integrated to the surface for being grown in the carbon nano-fiber of substrate surface, then preferably at 60 DEG C -80 DEG C At a temperature of be heat-treated, finally obtain the conductive magneto-conductive nano-functional material in the present invention, heat treatment temperature is unsuitable excessively high, otherwise can Cause falling off for carbon nano-fiber.In one embodiment, the substrate of carbon nano-fiber can is immersed in magnetic Nano growth Particle disperses in solution, is heated at 60 DEG C -80 DEG C.In another embodiment, magnetic nanoparticle is divided using spray coating method It dissipates solution and is coated in carbon nano-fiber surface, and in 60 DEG C of -80 DEG C of vacuum drying.Magnetic nanoparticle is being integrated to carbon nanometer Should be avoided while fiber surface influences carbon nano-fiber pattern or carbon nano-fiber is made to fall off from substrate surface.
Because carbon nano-fiber is grown directly upon substrate surface, carbon nano-fiber ordered arrangement not only has bigger ratio Surface area and three-dimensional porous structure, and be easier to separate and recover, nano particle can be overcome to be easy the shortcomings that reuniting.
The conductive magneto-conductive nano-functional material being grown in substrate prepared by the above method, has carbon nano-fiber concurrently The orientation in electric field, magnetic field may be implemented in the magnetism of electric conductivity and magnetic nanoparticle, and not only density is low, and can pass through tune Whole each technological parameter adjusts the electromagnetic parameter of material, and it is steady to make it have higher saturation magnetization, good physical chemistry Qualitative and corrosion resistance is expected to be used widely in terms of sound-absorbing inhales wave.In addition, the electromagnetism separate type of the composite material It can be expected to important application prospects in terms of chemistry, biology, medicine, environmental area.
Embodiment 1
In the present embodiment using carbon fiber as base material.
Commercial carbon fiber is ultrasonically treated at room temperature using acetone and ethyl alcohol, and is heat-treated 30 minutes at 500 DEG C, Remove the epoxy resin pulp layer that carbon fiber surface is smeared.Volume will be used at normal temperatures and pressures except the pure carbon fiber (CFs) after slurry Than being handled 12 hours for the nitric/sulfuric acid mixed solution acid of 1:3, is washed after filtering, is dry, obtaining acidification carbon fiber.
By acidification impregnated carbon fiber 24 hours in the catalyst solution prepared, catalyst is made to be coated uniformly on carbon fiber Surface.Above-mentioned catalyst solution passes through mixing ethyl orthosilicate (TEOS), nickel nitrate, surfactant Pluronic P123 (EO20PO70EO20,Mav=5800), distilled water, ethyl alcohol and hydrochloric acid form, and mixed proportion is ethyl orthosilicate: surfactant: H2O: ethyl alcohol: hydrochloric acid: nickel nitrate=1:0.002:9.36:21.4:0.04:0.023.
Substrate is taken out from catalyst solution, is calcined 30 minutes after dry at 450 DEG C, is obtained to surface and be evenly distributed with catalysis The carbon fiber of oxidant layer.
Above-mentioned carbon fiber is placed in tube furnace, the inert gas (nitrogen of 150cc/min-300cc/min flow is passed through Gas, argon gas or helium), 600 DEG C are warming up to the heating rate of 5 DEG C/min, the hydrogen 30 for then passing to 20cc/min flow divides Clock, reducing catalyst are passed through the carbon-source gas acetylene of 30cc/min flow 30 minutes later, and obtaining surface growth has carbon Nanowire Tie up the carbon fibre composite (CNFs-CFs) of (CNFs).Fig. 2 is the scanning electron microscope (SEM) photograph and growth carbon nano-fiber of pure carbon fiber The scanning electron microscope (SEM) photograph of carbon fiber later, it can be seen from the figure that carbon nano-fiber homoepitaxial is in carbon fiber surface.Surface is raw Carbon fiber with carbon nano-fiber has better electric conductivity compared with pure carbon fiber.
After to the end of chemical vapour deposition reaction, hydrogen and carbon-source gas acetylene are closed, 800 DEG C is warming up to, is passed through The carbon dioxide gas of 166cc/min 60 minutes carries out surface oxidation treatment, closes carbon dioxide gas later, be cooled to room Temperature.
By FeCl3·6H2O and FeCl2·4H2O and concentrated hydrochloric acid are dissolved in advance through N2In the deionized water of deoxidation;At 80 DEG C Under water-bath and mechanical agitation, the above solution is added drop-wise to N dropwise2In the alkaline aqueous solution of protection, continue to lead to after dripping Enter N2, while insulated and stirred;After reaction, iron oxide nano particle obtained is separated using externally-applied magnetic field;It will Obtained ferroferric oxide magnetic nanoparticle with twice of washes of absolute alcohol, clean twice by again with toluene.
The CNFs-CFs composite material of surface activation process is soaked in ferroferric oxide magnetic nanoparticle dispersion solution In, magnetic nanoparticle concentration is 50mg/mL, is standing and soaking 12 hours at 60 DEG C, obtains Fe3O4- CNFs-CFs composite material.
Embodiment 2
In the present embodiment, using fiberglass woven cloth as base material.
Acidification fiberglass woven cloth (SFs) in the same manner as in the example 1, and it is uniform on the acidification surface SFs Catalyst layer grows carbon nano-fiber on fiberglass woven cloth surface using chemical vapour deposition technique.
After to the end of chemical vapour deposition reaction, hydrogen and carbon-source gas are closed, 800 DEG C is warming up to, is passed through 166cc/ The carbon dioxide gas of min 30 minutes carries out surface oxidation treatment, closes carbon dioxide gas later, be cooled to room temperature.
The CNFs-SFs composite material of surface active is soaked in various sizes of magnetic nanoparticle dispersion solution, is stirred It mixes uniformly, is placed in reaction kettle and seals, reacted, finally obtain Fe3O4- CNFs-SFs composite material.Magnetic nanoparticle Size Control is in 20-100nm.
Or magnetic nanoparticle dispersion solution is coated uniformly on by CNFs-SFs composite material surface using spray coating method, 80 DEG C are dried in vacuo 24 hours, finally obtain Fe3O4- CNFs-SFs composite material.Attached drawing 3 compared CNFs-SFs composite material And Fe3O4The magnetism of-CNFs-SFs composite material, it can be seen that the Fe of modifying magnetic nano particle3O4- CNFs-SFs composite wood Material has apparent magnetic.
Embodiment 3
In the present embodiment, base material is used as using pencil-lead (2H, 0.5mm).
Pencil-lead is handled 10 minutes with the nitric/sulfuric acid mixed solution acid that volume ratio is 1:3 at normal temperatures and pressures, filtering It washs afterwards, is dry, obtaining acidification pencil-lead.
Pencil-lead is impregnated in the catalyst solution prepared 24 hours, drying is taken out, calcines 30 minutes and goes at 450 DEG C Except the surfactant as template, catalyst is made to be coated uniformly on acidification pencil wicking surface.Catalyst in the present embodiment Solution is identical as catalyst solution used in Example 1.Carbon is grown in above-mentioned pencil wicking surface using chemical vapour deposition technique Nanofiber.
Surface activation process is carried out to carbon nano-fiber in method same as Example 2, and magnetic nanoparticle is divided Scattered solution is attached to carbon nano-fiber surface.
Embodiment 4
In the present embodiment, base material is used as using capillary (0.5mm).
Capillary is used 10% hydrofluoric acid solution acid handle at normal temperatures and pressures 60 minutes, is washed after taking-up, is dry.
Using syringe, catalyst solution is passed through inside capillary, it is dry, and 30 minutes are calcined at 450 DEG C with removal As the surfactant of template, catalyst is made to be evenly distributed on the inner surface of capillary.Above-mentioned catalyst solution and implementation Catalyst solution in example 1 is identical.
Carbon nano-fiber is grown in above-mentioned capillary inner surface using chemical vapour deposition technique.With same as Example 2 Method carries out surface activation process to carbon nano-fiber.
The magnetic nanoparticle of preconfigured 30mg/mL is dispersed into solution, using pipette inside capillary, is made Magnetic nanoparticle is evenly applied to the inner surface of capillary, is dried in vacuo 24 hours at 80 DEG C, finally obtains hollow Fe3O4- CNFs- capillary composite material.
Embodiment 5
In the present embodiment, base material is used as using iron wire (0.3mm, 10cm).
Iron wire is calcined 30 minutes at 300 DEG C.Iron wire is impregnated in the catalyst solution prepared 24 hours, is taken out dry It is dry, surfactant of the removal in 30 minutes as template is calcined at 450 DEG C, and catalyst is made to be coated uniformly on iron wire surface.This Catalyst solution in embodiment is identical as catalyst solution used in Example 1.
Carbon nano-fiber is grown on above-mentioned iron wire surface using chemical vapour deposition technique.In method same as Example 2 Surface activation process is carried out to carbon nano-fiber.
The CNFs- iron wire composite material of surface activation process is soaked in various sizes of magnetic nanoparticle dispersion solution In, magnetic nanoparticle concentration is 30mg/mL, and the size Control of magnetic nanoparticle impregnates 12 at 60 DEG C in 20nm-100nm Hour, obtain Fe3O4- CNFs- iron wire composite material.
Or by above-mentioned magnetic nanoparticle dispersion solution spraying in above-mentioned CNFs- iron wire composite material surface, at 80 DEG C Vacuum drying 24 hours, finally obtains Fe3O4- CNFs- iron wire composite material.
In the present invention, make carbon nano-fiber homoepitaxial in substrate surface using chemical vapour deposition technique, can be applied to Different substrates does not limit material, the shapes and sizes of substrate.By controlling the controlled distribution technology of catalyst, effectively control Growth morphology, length, the thickness of carbon nano-fiber processed, improve the spatial ordering of molecular arrangement, obtain large specific surface area, tool There are three-dimensional porous road structure, ordering growth in the carbon nano-fiber layer of substrate surface, assigns base conductive ability, it is negative to improve substrate Carry the effective area of magnetic nanoparticle.
By using meso-porous titanium dioxide silica solution isosol as catalyst carrier, catalyst can be made to be dispersed in base Bottom surface, and the carbon nano-fiber of herringbone arrangement is obtained, the specific surface area of substrate is further increased, stability is obtained Good, large amount of adsorption coating layer.
The present invention carries out surface-functionalized processing to carbon nano-fiber using gas, can uniformly, comprehensively in hydrophobicity Carbon nano-fiber surface introduce different oxygen-containing, nitrogen-containing functional group, improve carbon nano-fiber surface can, increase magnetic Nano The binding site of particle, and can prevent from carrying out falling off for carbon nano-fiber caused by surface-functionalized processing using solution.Cause The carbon nano-fiber of modified by magnetic nanoparticles is grown directly upon substrate surface, and stable structure is not easily to fall off, and carbon nano-fiber has Sequence arrangement, not only has bigger specific surface area and three-dimensional porous structure, but also be easier to separate and recover, can overcome nano particle It is easy the shortcomings that reuniting.
By conductive magneto-conductive nano-functional material obtained by the above method, the electric conductivity and magnetism for having carbon nano-fiber concurrently are received The orientation in electric field, magnetic field may be implemented in the magnetism of rice grain, and not only density is low, and can come by adjusting each technological parameter The electromagnetic parameter for adjusting material, makes it have higher saturation magnetization, good physical and chemical stability and corrosion resistance Can, it is expected to be used widely in terms of sound-absorbing inhales wave.In addition, the electromagnetism separate type performance of the composite material be expected to chemistry, It is with important application prospects in terms of biology, medicine, environmental area.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (10)

1. a kind of preparation method of conductive magneto-conductive nano-functional material, comprising:
Substrate is pre-processed;
Carbon nano-fiber is grown in the substrate surface using chemical vapour deposition technique;
The CO of 20cc/min-300cc/min is passed through under the conditions of 400 DEG C -1100 DEG C of temperature2Gas 10min-180min, or It is passed through the plasma gas 1min-30min of 10cc/min-300cc/min under normal temperature conditions, the carbon nano-fiber is carried out Surface-functionalized processing;And
Magnetic nanoparticle dispersion solution is attached to the carbon nano-fiber surface, including surface growth is had into the carbon nanometer The substrate of fiber is immersed in magnetic nanoparticle dispersion solution and is heated, or by the magnetic nanoparticle Dispersion solution spraying is dried in vacuo in the carbon nano-fiber surface,
Wherein, the magnetic nanoparticle partial size is 10nm-500nm.
2. the preparation method of conductive magneto-conductive nano-functional material according to claim 1, which is characterized in that the magnetism is received Rice grain is ferroferric oxide nano granules.
3. the preparation method of conductive magneto-conductive nano-functional material according to claim 1, which is characterized in that the plasma Gas is the plasma gas of nitrogen, oxygen or air.
4. the preparation method of conductive magneto-conductive nano-functional material according to claim 1, which is characterized in that the substrate is It is plate, netted, tubulose, woven fabric-like or Filamentous.
5. the preparation method of conductive magneto-conductive nano-functional material according to claim 1, which is characterized in that the substrate choosing From one of carbon fiber, glass fibre, inorganic oxide fibres, pencil-lead, capillary and wire.
6. the preparation method of conductive magneto-conductive nano-functional material according to claim 1, which is characterized in that it is described will be magnetic The step of nano particle dispersion solution is attached to carbon nano-fiber surface includes the institute that surface growth is had the carbon nano-fiber It states substrate to be immersed in 60 DEG C -80 DEG C of magnetic nanoparticle dispersion solution, or including magnetic nanoparticle is dispersed solution It is sprayed at the carbon nano-fiber surface, in 60 DEG C of -80 DEG C of vacuum drying.
7. the preparation method of conductive magneto-conductive nano-functional material according to claim 1, which is characterized in that described in substrate The process of surface growth carbon nano-fiber further includes being handled in advance in the substrate surface using catalyst solution, is urged to be formed The preparation process of agent layer, the catalyst solution are the sol-gel solutions containing catalyst.
8. the preparation method of conductive magneto-conductive nano-functional material according to claim 7, which is characterized in that the catalyst Catalyst in solution is selected from the alloy of iron, nickel, cobalt metal or any combination thereof, and the colloidal sol in the catalyst solution is selected from two Silica, titanium dioxide, aluminium oxide, silica/alumina complex or earth silicon/titanic oxide composite sol.
9. the preparation method of conductive magneto-conductive nano-functional material according to claim 7, which is characterized in that the catalyst Solution passes through mixing silica precursor, TiO 2 precursor or alumina precursor, metal nitrate, surface-active Agent, distilled water, ethyl alcohol and hydrochloric acid and obtain.
10. the preparation method of conductive magneto-conductive nano-functional material according to claim 9, which is characterized in that the metal Nitrate is nickel nitrate;The surfactant is polyoxyethylene polyoxypropylene copolymer p 123, F127 or chitosan;Described two Siliconoxide precursor is one of methyl orthosilicate, ethyl orthosilicate, positive silicic acid propyl ester or a variety of mixing;The titanium dioxide Titanium precursors are sour four fourth vinegar by the emperor himself;The alumina precursor is aluminum sulfate or aluminum nitrate.
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Inventor after: Meng Longyue

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