CN106241886A - A kind of Electromagnetic enhancement carbon magnetic composite and preparation method and application - Google Patents
A kind of Electromagnetic enhancement carbon magnetic composite and preparation method and application Download PDFInfo
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- C01G49/00—Compounds of iron
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- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- C01P2006/42—Magnetic properties
Abstract
The present invention is a kind of Electromagnetic enhancement carbon magnetic composite and preparation method and application.The component of this composite is expanded graphite and spinel structure Fe3O4, carbon iron atom ratio is 22.58～95.15.The preparation of this composite includes the preparation of expanded graphite, the preparation of expanded graphite/glycolic ferrum nanometer sheet complex and expanded graphite/Fe3O4The preparation of nano-rings complex.The mentality of designing of material of the present invention is novel, electromagnetic parameter strengthens notable, and gained carbon magnetic material will have broad application prospects in fields such as shielding, microwave absorption, electrode material, the removal of disinfection byproduct (DBP), Magnetic Sensor, detection, bio-separation or medical imagings；The inventive method formation mechenism is novel, process is simple, it is easily controllable to form.
Description
Technical field
The present invention relates to electromagnetic functional material field, be specifically related to the design of a kind of Electromagnetic enhancement carbon magnetic composite, system
Standby and using method.
Background technology
Designing and preparing new and effective electromagnetic wave shielding with absorbing material is to solve having of current microwave electromagnetic pollution problem
Effect approach.The microwave absorbing material of excellent performance must meet impedance matching condition (i.e. μ '～ε ') and strong electromagnetic wave absorb (or
Decay) characteristic (the highest tg δE, tg δM).At present, by the compound of different loss-type microwave wave absorbing agents and composition, pattern, knot
Structure, size, distribution, surface can regulate dielectric constant with the regulation and control at interface on a large scale.Due to the restriction of the Snoek limit, greatly
Amplitude improves pcrmeability and remains a world-famous puzzle.The research of forefathers shows, has the material of in-plane anisotropy at high frequency
Under have higher pcrmeability and natural resonant frequency, the restriction of the Snoek limit can be broken through.As, Co2Z-type plane hexad ferrite
Because the anisotropy in its c-axis direction has the Snoek ultimate value bigger than common block materials more than intra-face anisotropy
[J.Appl.Phys.,1988,64(10),6047-6049].The anisotropic thin film of in-plane mono-axial has higher Snoek pole
Limit value [J.Appl.Phys., 1997,81 (8), 5166-5168；J.Magn.Magn.Mater.,2003,258,195-197].
According to double anisotropic models:(Ha1And Ha2Illustrate the effective anisotropy in two vertical planes
).When system has two kinds or further types of anisotropy, or when there is the anisotropy of easy magnetization face type,
When this anisotropy is much larger than the anisotropy field within easy magnetization face, higher Snoek ultimate value will be obtained.Current
The synthetic method of material is difficult to prepare high double anisotropic materials, which has limited the raising of pcrmeability.
In the present invention, the expanded graphite of our high conductivity and Fe3O4Nano-rings is combined, by controlling Fe3O4Nano-rings
Content can regulate and control dielectric constant and pcrmeability on a large scale.These materials shielding, microwave absorption, magnetic recording material,
The fields such as logical device, Magnetic Sensor, detection, bio-separation, medical imaging and targeted drug have broad application prospects.
Summary of the invention
It is desirable to provide the new mentality of designing that a kind of electromagnetic parameter strengthens, particularly pcrmeability strengthens and electromagnetism increase
The preparation method of strong carbon magnetic composite.The mentality of designing of material is novel, preparation technology is simple, easily controllable.The method gained
Expanded graphite/Fe3O4Nano-rings complex has significant electromagnetic parameter enhancement effect, and can expand stone by regulation and control
The electrical conductivity of ink, Fe3O4Nano-rings content controls electromagnetic parameter.
The present invention solves its technical problem and uses following technical scheme:
The Electromagnetic enhancement carbon magnetic composite that the present invention provides, its component is expanded graphite and spinel structure Fe3O4, carbon
Iron atom ratio is 22.58～95.15.
Described expanded graphite is vermiform multi-layer sheet structure, a length of 120～850 μm, a width of 60～260 μm, resistivity
It is 0.08～1.30m Ω cm.
Described Fe3O4For polycrystalline Nano ring, its major axis a length of 60 ± 20～200 ± 20nm, major axis and short axle ratio are 1.2
～1.7, ring thickness is 10～25nm；
Described Electromagnetic enhancement carbon magnetic composite, its saturation magnetization range is 7.12～23.61emu g–1。
In 2～18GHz frequency ranges, the real part of permittivity of this Electromagnetic enhancement carbon magnetic composite and imaginary part relative to
Expanded graphite increases by 0.1～70 and 0.1～450 times respectively, the pcrmeability real part of this Electromagnetic enhancement carbon magnetic composite and imaginary part
Relative to Fe3O4Nano-rings increases by 0.8～4.5 and 0.5～136 times respectively.
The above-mentioned Electromagnetic enhancement carbon magnetic composite that the present invention provides, its preparation method comprises the steps:
(1) preparation of expanded graphite:
Use ball milling-thermal expansion technique to prepare expanded graphite: first by expansible graphite ball milling 0～5h, then 500～
800 DEG C expand 15～60min, obtain expanded graphite；
(2) preparation of expanded graphite/glycolic ferrum nanometer sheet complex:
Absorption method is used to prepare expanded graphite/glycolic ferrum nanometer sheet complex, specifically: first by surfactant 0.5
～2.0g, expanded graphite 0.5g, water 100mL and glycolic ferrum nanometer sheet are stirred at room temperature 12h, then sucking filtration separates, and obtains
Required expanded graphite/glycolic ferrum nanometer sheet complex；The mass ratio of glycolic ferrum nanometer sheet and expanded graphite be 0.2～
0.8；
(3) expanded graphite/Fe3O4The preparation of nano-rings complex:
Sintering process is used to prepare expanded graphite/Fe3O4Nano-rings complex, specifically: first load with pottery Noah's ark and expand
Graphite/glycolic ferrum nanometer sheet complex, is then placed in Noah's ark in single temperature tube furnace, under nitrogen or argon, in 300
～by carbothermic reduction reaction 1～2h at 500 DEG C, furnace cooling, to room temperature, finally obtains expanded graphite/Fe3O4Nano-rings is combined
Thing, it is described Electromagnetic enhancement carbon magnetic composite.
In said method, described surfactant is PVP (polyvinyl pyrrolidone), CTAB (cetyl front three
Base ammonium bromide).
The present invention provide Electromagnetic enhancement carbon magnetic composite, its shielding, microwave absorption, the removal of disinfection byproduct (DBP),
Application in magnetic recording material, logical device, Magnetic Sensor, detection, bio-separation, medical imaging or targeted drug field.
The Electromagnetic enhancement carbon magnetic composite that the present invention provides, it has significant microwave electromagnetic enhancement effect, this effect
It is the double anisotropy by the ultra-thin carbon-coating of expanded graphite and spinel structure Fe3O4Plasma resonance strengthen synergism
Lower realization.
The present invention utilizes double anisotropy and the Fe of the ultra-thin carbon-coating of expanded graphite3O4The plasma resonance of nano-rings strengthens effect
Dielectric constant and pcrmeability should be improved.
Due to the fact that expanded graphite and the Fe that have employed high conductivity3O4Nano-rings is compound prepares high Electromagnetic enhancement function
Material, with existing Co2Z-type plane hexad ferrite is compared with thin-film material, has the following advantages that and good effect:
(1) preparation process is simple, formation mechenism is novel；
(2) electromagnetic parameter strengthens notable, and Electromagnetic enhancement mechanism is novel；
(3) carbon magnetic complex composition is prone to regulation and control, and electromagnetic parameter is adjustable；
(4) cheaper starting materials is easy to get, and preparation cost is low, and efficiency is high, it is easy to commercial Application is promoted.
Accompanying drawing explanation
Fig. 1 is the XRD phase structure collection of illustrative plates of embodiment 13.
Fig. 23 be embodiment 1 observe under scanning nuclear microprobe pattern, structure.
Fig. 4 is the elementary analysis energy spectrogram of embodiment 1,46.
Fig. 5 is the electrostatic theory curve of embodiment 1,46.
Fig. 67 is the electromagnetic parameter figure of embodiment 1,46.
Fig. 8 is the XRD phase structure collection of illustrative plates of embodiment 23.
Fig. 9 10 is the electromagnetic parameter figure of embodiment 23.
Figure 11 13 is the pattern observed under scanning electron microscope of embodiment 46 products therefrom respectively.
Figure 14 17 is the electromagnetic parameter figure of embodiment 7 10.
Figure 18 is the dielectric constant figure of embodiment 11 13.
Figure 19 is the electromagnetic parameter figure of embodiment 14.
Figure 20 is the electromagnetic parameter figure of embodiment 15.
Figure 21 is the electromagnetic parameter figure of embodiment 16.
Detailed description of the invention
In order to be more fully understood that the present invention, it is further elucidated with present disclosure below in conjunction with embodiment and accompanying drawing, but this
The content of invention is not limited solely to the following examples.
Embodiment 1:
The expanded graphite (500mg) that first 700 DEG C of expansions obtained, PVP (2g), water (150mL) add in 250mL beaker
Stirring 12h, obtains the modified expanded graphite crossed, then by the expanded graphite of modification and glycolic ferrum nanometer sheet (200mg), water
(100mL) mix and blend 2h in beaker.Products therefrom after sucking filtration is dried in 60 DEG C of vacuum drying ovens 5h, finally sample is existed
N2Protect lower 400 DEG C of sintering 2h, obtain Electromagnetic enhancement carbon magnetic composite.
Gained Electromagnetic enhancement carbon magnetic composite, its thing phase, the pattern observed under scanning electron microscope and transmission electron microscope and
The most as shown in Figures 1 to 3, product is Fe to structure3O4With the complex of expanded graphite, expanded graphite length 120～850 μm, a width of 60
～260 μm, it is uniformly dispersed with oval Fe3O4Nano-rings, its long axial length 145 ± 20nm；Its major axis and short axle ratio are
1.2～1.7；Ring major axis boss ratio is 0.3～0.7.
Gained Electromagnetic enhancement carbon magnetic composite, as shown in Figure 4, carbon iron atom ratio is 38.84 to its power spectrum, and resistivity is
0.18mΩ·cm；Its electrostatic theory is as it is shown in figure 5, saturation magnetization is 15.07emu g-1, coercivity is 28.82Oe；Its
As shown in figs. 6-7, in 2～18GHz frequency ranges, real part of permittivity and imaginary part are relative to expanded graphite respectively for electromagnetic parameter
Increasing by 7～45 and 5～327 times, its pcrmeability real part and imaginary part are relative to Fe3O4Nano-rings increases by 4～4.5 and 6.5～28 respectively
Times.
Embodiment 2:
Identical with embodiment 1 step, but calcining heat is 300 DEG C.Gained Electromagnetic enhancement carbon magnetic composite, its thing is the most such as
Shown in Fig. 1, product is Fe3O4Complex with expanded graphite；As shown in Figure 8, saturation magnetization is its electrostatic theory
12.01emu·g-1, coercivity is 40.57Oe；Its electromagnetic parameter as shown in Fig. 9～10, dielectric in 2～18GHz frequency ranges
Constant real part and imaginary part increase by 0.5～22 and 6.5～90 times respectively relative to expanded graphite, and its pcrmeability real part is relative with imaginary part
In Fe3O4Nano-rings increases by 3～4 and 2.5～19.5 times respectively.
Embodiment 3:
Identical with embodiment 1 step, but calcining heat is 500 DEG C.Gained Electromagnetic enhancement carbon magnetic composite, its thing is the most such as
Shown in Fig. 1, product is Fe3O4Complex with expanded graphite.As shown in Figure 8, saturation magnetization is its electrostatic theory
10.88emu·g-1, coercivity is 63.57Oe；Its electromagnetic parameter as shown in Fig. 9～10, dielectric in 2～18GHz frequency ranges
Constant real part and imaginary part increase by 0.5～7 and 4.5～160 times respectively relative to expanded graphite, and its pcrmeability real part is relative with imaginary part
In Fe3O4Nano-rings increases by 2～2.5 and 3～7.5 times respectively.
Embodiment 4:
Identical with embodiment 1 step, but the quality adding glycolic ferrum sodium rice sheet is 100mg.Gained Electromagnetic enhancement carbon magnetic
Composite, its pattern observed under scanning electron microscope is as shown in figure 11, it is seen that glycolic ferrum sodium rice sheet is at expanded graphite table
The distribution density in face is less than embodiment 1；As shown in Figure 4, carbon iron atom ratio is 95.15 to its power spectrum；Its electrostatic theory such as Fig. 5 institute
Showing, saturation magnetization is 7.12emu g-1, coercivity is 15.44Oe；Its electromagnetic parameter as shown in figs. 6-7,2～
In 18GHz frequency range, real part of permittivity and imaginary part increase by 3～24 and 4～205 times respectively relative to expanded graphite, its magnetic conductance
Rate real part and imaginary part are relative to Fe3O4Nano-rings increases by 1.8～2 and 10～12.5 times respectively.
Embodiment 5:
Identical with embodiment 1 step, but the quality adding glycolic ferrum sodium rice sheet is 400mg, and surfactant is CTAB.
Gained Electromagnetic enhancement carbon magnetic composite, its pattern observed under scanning electron microscope is as shown in figure 12, it is seen that glycolic ferrum sodium
The rice sheet distribution density on expanded graphite surface is bigger than embodiment 1；As shown in Figure 4, carbon iron atom ratio is 22.58 to its power spectrum；Its
Electrostatic theory is as it is shown in figure 5, saturation magnetization is 23.61emu g-1, coercivity is 34.79Oe, its electromagnetic parameter such as Fig. 6
～shown in 7, in 2～18GHz frequency ranges, real part of permittivity and imaginary part increase by 3～68.5 Hes respectively relative to expanded graphite
4～330 times, its pcrmeability real part and imaginary part are relative to Fe3O4Nano-rings increases by 3～3.5 and 2.5～30 times respectively.
Embodiment 6:
Identical with embodiment 1 step, but the quality adding glycolic ferrum sodium rice sheet is 600mg.Gained Electromagnetic enhancement carbon magnetic
Composite, as shown in figure 13, glycolic ferrum sodium rice sheet is on expanded graphite surface for its pattern observed under scanning electron microscope
Distribution density is bigger than embodiment 1；As shown in Figure 4, carbon iron atom ratio is 15.10 to its power spectrum；Its electrostatic theory is as it is shown in figure 5, satisfy
It is 34.63emu g with the intensity of magnetization-1, coercivity is 44.53Oe；Its electromagnetic parameter as shown in figs. 6-7,2～18GHz frequency
In the range of rate, real part of permittivity and imaginary part increase by 0.6～18 and 0.2～26 times respectively relative to expanded graphite, and its pcrmeability is real
Portion and imaginary part are relative to Fe3O4Nano-rings increases by 1～1.1 and 1.3～2 times respectively.
Embodiment 7:
Identical with embodiment 1 step, but expanded graphite used grinding of ball grinder 5h before high-temperature expansion.Gained Electromagnetic enhancement
Carbon magnetic composite, its resistivity is 2.10m Ω cm；Its electromagnetic parameter is as shown in Figure 14～15, at 2～18GHz frequency models
Enclose interior real part of permittivity and imaginary part and increase by 0.5～20 and 0.5～7.5 times relative to expanded graphite respectively, its pcrmeability real part
With imaginary part relative to Fe3O4Nano-rings increases by 0.8～1.2 and 0.7～6 times respectively.
Embodiment 8:
Identical with embodiment 1 step, but expanded graphite used grinding of ball grinder 10h before high-temperature expansion.Gained electromagnetism increases
Strong carbon magnetic composite, its resistivity is 40.70m Ω cm；Its electromagnetic parameter is as shown in Figure 14～15, in 2～18GHz frequencies
In the range of real part of permittivity and imaginary part increase by 0.1～3.5 and 0.1～4 times respectively relative to expanded graphite, its pcrmeability real part
With imaginary part relative to Fe3O4Nano-rings increases by 1～1.1 and 0.5～1.5 times respectively.
Embodiment 9:
Identical with embodiment 1 step, but expanded graphite high-temperature expansion at 500 DEG C obtains.Gained Electromagnetic enhancement carbon
Magnetic composite, its electromagnetic parameter as shown in Figure 16～17, real part of permittivity and imaginary part phase in 2～18GHz frequency ranges
Expanded graphite being increased respectively to 0.5～46 and 3～450 times, its pcrmeability real part and imaginary part are relative to Fe3O4Nano-rings is respectively
Increase by 1～2.5 and 5.5～80 times.
Embodiment 10:
Identical with embodiment 1 step, but expanded graphite high-temperature expansion at 800 DEG C obtains.Gained Electromagnetic enhancement carbon
Magnetic composite, its electromagnetic parameter as shown in Figure 16～17, real part of permittivity and imaginary part phase in 2～18GHz frequency ranges
Expanded graphite being increased respectively to 1.5～70 and 2.5～275 times, its pcrmeability real part and imaginary part are relative to Fe3O4Nano-rings is divided
Zeng Jia by 2.5～3.5 and 3～136 times.
Embodiment 11:
First muffle furnace is risen to 400 DEG C, be more quickly put into Muffle with aluminum alloy container loading 100g expansible graphite
Take out after stove is incubated 60min, obtain required expanded graphite.Its resistivity is 5.80m Ω cm.Electromagnetic parameter such as Figure 18 institute
Show.
Embodiment 12:
Identical with embodiment 11 step, but graphite expansion temperature is 500 DEG C, Bulking Time 30min.Gained expanded graphite,
Its resistivity is 1.2m Ω cm；Its electromagnetic parameter is as shown in figure 18.
Embodiment 13:
Identical with embodiment 12 step, but graphite expansion temperature is 800 DEG C, Bulking Time 15min.Gained expanded graphite,
Its resistivity is 1.30m Ω cm；Its electromagnetic parameter is as shown in figure 18.
Embodiment 14:
First by FeCl3·6H2O (5mmol), ethylene glycol (40mL) and Macrogol 2000 (0.5g) add polytetrafluoroethyl-ne to
In alkene liner, magnetic agitation 30min.In again ethylenediamine (10mmol) (alkali is 2 with the ratio of the amount of slaine material) being joined
Mix and blend 2.0h in lining.Finally liner is put in rustless steel still and react 6h, centrifuge washing after cooling at 200 DEG C.Do for 60 DEG C
Dry 6h obtains required single dispersing glycolic ferrum nanometer sheet.By its under nitrogen protection 400 DEG C burn 2h, obtain Fe3O4Nano-rings.Body
Fraction is the Fe of 20%3O4The electromagnetic parameter of nano-rings as shown in figure 19, Fe in 2～18GHz frequency ranges3O4Nano-rings
Real part of permittivity and imaginary part be respectively 4.8～6.4 and 1.1～1.6, the real part of its pcrmeability and imaginary part be respectively 1.0～
1.05 and-0.1～0.1.This is significantly lower than expanded graphite/Fe3O4Nano-rings carbon magnetic complex (see embodiment 1).
Embodiment 15:
The expanded graphite (500mg) that 700 DEG C of expansions obtained, PVP (2g), water (150mL) first add in 250mL beaker
Stirring 12h, then by the expanded graphite of modification, FeSO4·7H2O(0.001mol)、Fe(NO3)3·9H2O (0.001mol), water
(150mL) mix and blend 20min in beaker.NaOH solution (0.002mol), water-bath is dripped after water-bath is warming up to 70 DEG C
Reaction 10min.Washing, sucking filtration after cooling, products therefrom dries 5h in 60 DEG C of vacuum drying ovens.Finally by sample at N2Under protection
400 DEG C of sintering 2h, obtain expanded graphite/Fe3O4Nanoparticle carbon magnetic complex.Volume fraction is the electromagnetic parameter such as figure of 20%
Shown in 20, expanded graphite/Fe in 2～18GHz frequency ranges3O4The real part of permittivity of nanoparticle carbon magnetic complex and void
Portion is respectively 24.5～55 and 46.5～83.5, and the real part of its pcrmeability and imaginary part are respectively 1.01～1.05 and 0.14～1.3.
This is also significantly lower than expanded graphite/Fe3O4Nano-rings carbon magnetic complex (see embodiment 1).
Embodiment 16:
Identical with embodiment 1 step, but the size adding glycolic ferrum sodium rice sheet is 60 ± 20nm.Gained Electromagnetic enhancement carbon
Magnetic composite, its electromagnetic parameter as shown in figure 21, in 2～18GHz frequency ranges real part of permittivity and imaginary part relative to
Expanded graphite increases by 0.5～23.7 and 0.4～145 times respectively, and its pcrmeability real part and imaginary part are relative to Fe3O4Nano-rings is respectively
Increase by 0.9～1 and 2.4～12 times.
Electrical conductivity uses RTS-8 type four-point probe to measure.Electrostatic theory uses LakeShore company of the U.S. to produce
7404 type vibrating specimen magnetometers record.Elementary composition by EX-250 power spectrum survey meter quantitative analysis carbon magnetic nano-rings.Microwave
Electromagnetic property uses the test of Agilent 5230A network vector analyser, then uses formula RL(dB)=20log | (Zin-Z0)/(Zin+
Z0) | andCalculate microwave reflection rate (Z in formulainAnd Z0It is respectively absorbing material and freedom
Space impedance, μ and ε is respectively pcrmeability and dielectric constant, and f is frequency, and d is coating layer thickness, and c is the light velocity), and use following formula
Calculating microwave reflection rate:
In above-described embodiment, the glycolic ferrum nanometer sheet used can use Chinese patent literature 201510175533.8
Prepared by the method announced.
Claims (9)
1. an Electromagnetic enhancement carbon magnetic composite, it is characterised in that its component is expanded graphite and spinel structure Fe3O4, carbon
Iron atom ratio is 22.58～95.15.
2. Electromagnetic enhancement carbon magnetic composite as claimed in claim 1, it is characterised in that described expanded graphite is vermiform
Multi-layer sheet structure, a length of 120～850 μm, a width of 60～260 μm, resistivity is 0.08～1.30m Ω cm.
3. Electromagnetic enhancement carbon magnetic composite as claimed in claim 1, it is characterised in that described Fe3O4For polycrystalline Nano ring,
Its major axis a length of 60 ± 20nm～200 ± 20nm, major axis and short axle ratio are 1.2～1.7, and ring thickness is 10～25nm.
4. Electromagnetic enhancement carbon magnetic composite as claimed in claim 1, it is characterised in that the saturated magnetic of this carbon magnetic composite
Changing strength range is 7.12～23.61emu g–1。
5. Electromagnetic enhancement carbon magnetic composite as claimed in claim 1, is characterized in that in 2～18GHz frequency ranges, this carbon
The real part of permittivity of magnetic composite and imaginary part increase by 0.1～70 and 0.1～450 times respectively relative to expanded graphite, this carbon
The pcrmeability real part of magnetic composite and imaginary part are relative to Fe3O4Nano-rings increases by 0.8～4.5 and 0.5～136 times respectively.
6. a preparation method for Electromagnetic enhancement carbon magnetic composite, is characterized in that using following methods to prepare claim 1 to 5
In arbitrary described Electromagnetic enhancement carbon magnetic composite, the method comprises the steps:
(1) preparation of expanded graphite:
Ball milling-thermal expansion technique is used to prepare expanded graphite: first by expansible graphite ball milling 0～5h, then at 500～800 DEG C
Lower expansion 15～60min, obtains expanded graphite；
(2) preparation of expanded graphite/glycolic ferrum nanometer sheet complex:
Use absorption method to prepare expanded graphite/glycolic ferrum nanometer sheet complex, specifically: first by surfactant 0.5～
2.0g, expanded graphite 0.5g, water 100mL and glycolic ferrum nanometer sheet are stirred at room temperature 12h, and then sucking filtration separates, and obtains institute
Need expanded graphite/glycolic ferrum nanometer sheet complex；Glycolic ferrum nanometer sheet is 0.2～0.8 with the mass ratio of expanded graphite；
(3) expanded graphite/Fe3O4The preparation of nano-rings complex:
Sintering process is used to prepare expanded graphite/Fe3O4Nano-rings complex, specifically: first load with pottery Noah's ark and expand stone
Ink/glycolic ferrum nanometer sheet complex, is then placed in Noah's ark in single temperature tube furnace, under nitrogen or argon, in 300～
By carbothermic reduction reaction 1～2h at 500 DEG C, furnace cooling, to room temperature, finally obtains expanded graphite/Fe3O4Nano-rings is combined
Thing, it is described Electromagnetic enhancement carbon magnetic composite.
7. the preparation method of Electromagnetic enhancement carbon magnetic composite as claimed in claim 6, it is characterised in that live in described surface
Property agent is PVP or CTAB.
8. the application of arbitrary described Electromagnetic enhancement carbon magnetic composite in claim 1 to 5, it is characterized in that this material shielding,
Microwave absorption, the removal of disinfection byproduct (DBP), magnetic recording material, logical device, Magnetic Sensor, detection, bio-separation, medical imaging
Or the application in targeted drug field.
Application the most according to claim 8, is characterized in that this material has significant microwave electromagnetic enhancement effect, this effect
It is the double anisotropy by the ultra-thin carbon-coating of expanded graphite and spinel structure Fe3O4Plasma resonance strengthen synergism
Lower realization.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107644140A (en) * | 2017-10-11 | 2018-01-30 | 上海无线电设备研究所 | A kind of plasma material design method |
| CN108620577A (en) * | 2018-04-11 | 2018-10-09 | 浙江师范大学 | A kind of plasma resonance Electromagnetic enhancement bimetallic-medium dissimilar materials and its preparation and application |
| CN109837062A (en) * | 2017-11-27 | 2019-06-04 | 洛阳尖端技术研究院 | A kind of wave absorbing agent and preparation method thereof |
| CN113249090A (en) * | 2021-05-14 | 2021-08-13 | 同济大学 | Composite material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107644140A (en) * | 2017-10-11 | 2018-01-30 | 上海无线电设备研究所 | A kind of plasma material design method |
| CN109837062A (en) * | 2017-11-27 | 2019-06-04 | 洛阳尖端技术研究院 | A kind of wave absorbing agent and preparation method thereof |
| CN108620577A (en) * | 2018-04-11 | 2018-10-09 | 浙江师范大学 | A kind of plasma resonance Electromagnetic enhancement bimetallic-medium dissimilar materials and its preparation and application |
| CN113249090A (en) * | 2021-05-14 | 2021-08-13 | 同济大学 | Composite material and preparation method and application thereof |
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