CN105161803A - Graphene film frequency selective surface - Google Patents
Graphene film frequency selective surface Download PDFInfo
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- CN105161803A CN105161803A CN201510677859.0A CN201510677859A CN105161803A CN 105161803 A CN105161803 A CN 105161803A CN 201510677859 A CN201510677859 A CN 201510677859A CN 105161803 A CN105161803 A CN 105161803A
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Abstract
The invention discloses a graphene film frequency selective surface comprising a substrate and a graphene film layer disposed on the substrate. The substrate is prepared from fiber reinforced polymer composite material. The graphene film layer comprises a graphene film with periodically-arranged holes or graphene film chips arranged periodically. The graphene film frequency selective surface is simple in technique implementation, well matches the fiber reinforced resins composite material substrate, is low in weight increment, resistant to corrosion, and can be widely applied to devices such as composite material radomes or filters.
Description
Technical field
The present invention relates to frequency selecting surface technique field, relate to a kind of graphene film frequency-selective surfaces especially.
Background technology
Frequency-selective surfaces (FrequencySelectiveSurfaces, be called for short FSS) is a kind of periodic array in two dimensions structure, is a spatial filter with regard to its essence, by identical unit in the two-dimensional direction regular being spaced form.FSS has specific He Ne laser effect and is widely used in microwave, infrared to visible light wave range.Frequency-selective surfaces comprises patch type shape and fluting class shape.Patch type shape obtains by being periodically covered with same metal patch at dielectric surface, is generally speaking use as band resistance mode filter, can plays low frequency transmission, the effect of high frequency reflection.Fluting class shape obtains by periodically offering slotted eye on a metal plate, belongs to the logical shape frequency-selective surfaces of band, can play bass reflex, the effect of high frequency transmission from the classification of frequency characteristic angle.
Along with high-performance fiber strengthens resin (FiberReinforcedPolymer, be called for short FRP) extensive use that has of composite material, increasing FRP composite material is used for the structure relevant to electromagnetic wave such as radome, antenna, and the surface therefore FSS being used for FRP composite material and component thereof also gets more and more.Existing FSS mostly is metal material.After metal FSS is bonded to FRP composite material surface, the two thermal coefficient of expansion difference is comparatively large, easily produces thermal mismatch problem.During ambient temperature acute variation, metal FSS can even come off by gross distortion at FRP composite material surface.And under the particular surroundingss such as ocean, metal FSS is vulnerable to there is the problems such as seriously corroded.In addition, if the devices such as large shape radar only use metal FSS, structure can be caused to increase weight the problem such as excessive.
Summary of the invention
The object of the present invention is to provide a kind of graphene film frequency-selective surfaces, the present invention mainly solves the technical problem that metal FSS in prior art is applied to thermal mismatching that FRP and structure thereof bring, perishable and structure weightening finish.
The invention provides a kind of graphene film frequency-selective surfaces, comprise substrate and be arranged at the graphene film layer on substrate, substrate is FRP composite material; Graphene film layer is the periodicity graphene film of perforate or the graphene film paster of periodic arrangement.By arranging graphene film layer at FRP composite material surface, substituting original conventional metal, the adaptive capacity of gained FSS to sharply transformation temperature can be improved, reduce the appearance of thermal mismatching situation.Graphene density is little simultaneously, quality light, and electric conductivity is suitable with metal material, is even better than common metal material, thus can better adapts to the needs of FSS.Graphene quality is light, corrosion-resistant, and obtained FSS can adapt to the needs of the seriously corroded environment such as ocean, and the weight of FSS is also alleviated.Improve the scope of application of gained FSS.Graphene film layer can be the conductive film that pure Graphene is made.Also can be after being doped with other component materials conductive capability be improved graphene composite film, be such as doped with the graphene/carbon nano-tube composite conductive film of carbon nano-tube or be doped with the graphene composite conductive film etc. of metal nanoparticle.Graphene film layer surface has cross-shaped through hole, Y shape hole, square hole, circular hole or Jerusalem unit.But be not limited to these unit.
Preferably, graphene film layer is graphene conductive film or doped graphene composite membrane.Adopt the thermal mismatch problem that effectively can reduce gained FRP composite material substrate FSS during this conducting film.
Preferably, graphene film layer conductivity is not less than 1 × 10
5s/m.Any conductivity meets the graphene film layer of FSS needs.
Preferably, graphene film layer surface has cross-shaped through hole, Y shape hole, square hole, circular hole or Jerusalem unit.
Preferably, FRP composite material is core filled composite material, laminate or cambered shell structure.After laminate refers to that multilayer FRP material is stacked herein, the laminate of hot forming.Cambered shell refers to that surface has FRP composite laminated structures or the sandwich structure of curvature.
Preferably, FRP composite material is that quartz fibre reinforced epoxy composite material honeycomb sandwich board or quartz fibre strengthen cyanate composite material laminate; Graphene film layer is graphene film or the H-shaped graphene film chip unit that surface is provided with the cross-shaped through hole of arrangement of multiple cycle; Graphene film layer thickness is 10 ~ 100 μm.The FSS adopting this structure to obtain has minimum thermal mismatching rate.
Preferably, the laminboard layer that battenboard comprises two-layer panel layer and is located between two-layer panel, panel layer is that quartz fibre reinforced epoxy or quartz fibre enhancing cyanate ester resin are made; Laminboard layer is that honeycomb or foam are made.The FSS adopting this structure to obtain effectively can reduce the thermal mismatching between Graphene and FRP material, thus makes obtained FSS have minimum thermal mismatching rate.
The present invention provides a kind of preparation method as foregoing graphites alkene film frequency-selective surfaces on the other hand, comprises the step that graphene film surface with preset pattern affixes to FRP composite material.In this step, preset pattern can be obtained by laser ablation or other engraving processes, is certainly not limited to this.Can also be using in the graphene dispersion of nanoscale to solution as printer ink, printed by 3D and obtain the graphene film layer with preset pattern, afterwards can as required again drying reduction obtain graphene film periodically perforate unit or chip unit.The preparation method of graphene film layer specifically can be, but not limited to adopt the method such as vacuum filtration method, spin-coating method, dip coating, self assembly assembling film forming, and then prepare graphene conductive film by the method for electronation and thermal reduction, the method such as chemical vapour deposition (CVD), electrophoretic deposition also can be adopted to prepare.
Preferably, preset pattern is printed by laser ablation or 3D and obtains.Adopt the method energy cost-saving, enhance productivity.
The present invention provides a kind of radome comprising foregoing graphites alkene film frequency-selective surfaces on the other hand.This radome energy adaptive temperature from the sharply change of-50 DEG C ~ 110 DEG C, and will cause radome to lose efficacy due to the material falls back on FSS surface.
Advantage of the present invention:
Graphene film frequency-selective surfaces provided by the invention, is arranged at FRP composite material surface by graphene film layer, thus improves the thermal matching energy of the two, decreases the FSS Problem of Failure because thermal mismatching causes.Simultaneously graphene film layer used also has high, the lightweight and corrosion resistant advantage of conductivity, improves the suitable application area of the FSS be made up of FRP.Radome, antenna substrate, Radar Stealth Materials, filter etc. can be made.The He Ne laser effect of graphene film FSS and conventional metals FSS is suitable, and thermal mismatching rate is low, and corrosion-resistant, environmental suitability is strong; Density is little, and structure weightening finish is little, is especially suitable for fiber-resin composite surface functional layer or establishes an one functional layer as in FRP composite material.
Above-mentioned graphene film frequency-selective surfaces preparation method provided by the present invention, obtain FSS by the graphene film layer with preset pattern is pasted on FRP composite material surface, the method is simple to operation, and production efficiency is higher.
The radome comprising above-mentioned graphene film frequency-selective surfaces provided by the invention, can adapt to the environment of-50 DEG C ~ 110 DEG C, improve the accommodation of radome.
With reference to above and other aspect of the present invention being made apparent according to the following description of the various embodiments of graphene film frequency-selective surfaces of the present invention.
Accompanying drawing explanation
The present invention is explained in more detail referring now to accompanying drawing, wherein:
Fig. 1 is the cross graphene film frequency-selective surfaces schematic perspective view of the preferred embodiments of the present invention;
Fig. 2 is the cross Graphene thin layer schematic perspective view of the preferred embodiments of the present invention;
Fig. 3 is the sandwich shape substrate schematic perspective view of the preferred embodiments of the present invention;
Fig. 4 is the H-shaped graphene film frequency-selective surfaces schematic perspective view of the preferred embodiments of the present invention;
Fig. 5 is the H-shaped graphene film layer schematic perspective view of the preferred embodiments of the present invention;
Fig. 6 is the laminated shape substrate schematic perspective view of the preferred embodiments of the present invention; And
Fig. 7 is the method flow schematic diagram of the preferred embodiments of the present invention.
Marginal data:
100, graphene film layer; 110, cross-shaped through hole; 200, substrate; 210, the first fiber-reinforced resin layer; 220, laminboard layer; 230, the second fiber-reinforced resin layer.
Embodiment
The invention provides a kind of graphene film frequency-selective surfaces, the surface mount structure using graphene film alternative metals as frequency-selective surfaces, thus the thermal mismatching rate decreasing gained FSS.
See Fig. 1 or Fig. 4, graphene film layer 100 is attached on substrate 200.Bond resin used, preferably adopts and bond with the contained sticking resin of tool in fiber-reinforced resin layer.Required FSS can be obtained.After bonding, can be, but not limited to adopt vacuum bag compression technology cure under pressure to make it formalize, obtain FSS.See Fig. 2, graphene film layer 100 is carved on graphene film by laser engraving the cross-shaped through hole 110 of arrangement of multiple cycle.Figure on obvious graphene film layer 100 is not limited to cross, is also not limited to adopt laser carving method.The thickness of graphene film layer 100 is 20 μm.
Certain graphene film layer 100 can as shown in Figure 5, be also the H-shaped paster that multiple cycle arranges.The methods such as laser engraving, mechanical engraving or 3D printing can be passed through obtain.Now the thickness of graphene film layer 100 can be 16 μm.
See Fig. 3, substrate 200 can for comprising the first fiber-reinforced resin layer 210, laminboard layer 220 and the second fiber-reinforced resin layer 230.First fiber-reinforced resin layer 210 and the second fiber-reinforced resin layer 230, just to setting, are provided with laminboard layer 220 therebetween.Such as the first fiber-reinforced resin layer 210 and the second fiber-reinforced resin layer 230 can be quartz fibre reinforced epoxy composite material, and thickness is 1.5mm, is certainly not limited to this.Laminboard layer 220 is the Nomex honeycomb of each hole length of side 4mm, and in laminboard layer 220, the thickness of material is 8mm.
See Fig. 6, substrate 200 used also can strengthen cyanate composite material laminate for quartz fibre.This laminate can for utilizing vacuum bag compression technology by stacked for the quartz textile of multilayer dielectric better performances postpone, and the thickness prepared is the laminate of 1mm.When using quartz fibre to strengthen cyanate composite material laminate as substrate 200, adopt cyanate bonding graphene film layer 100.Technique after stickup is identical with front.
See Fig. 7, the present invention additionally provides a kind of preparation method on the other hand and comprises the steps:
Be shaped: graphene film layer 100 is shaped according to preset pattern;
Paster: the graphene film layer 100 with preset pattern is affixed on fiber-reinforced resin layer;
Press molding: cure under pressure is carried out to the fiber-reinforced resin being pasted with graphene film layer 100.
Adopt above-mentioned steps can obtain the FSS with high thermal stability.
Embodiment
Embodiment 1
Prepare FSS sample 1 according to the following steps:
1) conductivity is selected to be about 1 × 10
5s/m thickness is the graphene film of 20 μm, is carved multiple cross-shaped through hole of rule arrangement by laser engraving on this graphene film;
2) prepare quartz fibre reinforced epoxy composite material honeycomb sandwich board as substrate by vacuum infusion method, wherein the upper and lower panel of honeycomb sandwich board is the quartz fibre reinforced epoxy composite laminated plate of thick 1.5mm.Sandwich is the Nomex honeycomb of core thickness 8mm, hole length of side 4mm, using epoxy resin as binding agent, the graphene film layer with multiple cross-shaped through hole is affixed to the surface of quartz fibre reinforced epoxy composite material honeycomb sandwich board substrate;
3) by vacuum bag pressure method cure under pressure, obtain that there is the logical shape graphene film FSS of band.
Embodiment 2
Prepare FSS sample 2 according to the following steps:
1) conductivity is selected to be 2 × 10
5s/m thickness is that the Graphene of 100 μm is thin, by multiple H-shaped chip units of mechanical engraving method carve rule cycle arrangement on this graphene film;
2) preparing thickness by vacuum bag pressure method is that the quartz fibre enhancing cyanate composite material laminate of 1mm is as substrate, using cyanate ester resin as binding agent, the graphene film layer with multiple H-shaped chip unit is affixed to the surface that quartz fibre strengthens cyanate composite material laminate substrate;
3) by vacuum bag pressure method cure under pressure, obtain that there is band resistance shape graphene film FSS.
Comparative example 1
Be with the difference of embodiment 1: adopt thickness to be that the Copper Foil of 20 μm carries out mechanical engraving, obtain the metal FSS that embodiment 1 graphene film has same size and quantity cross-shaped through hole, carry out bonding with quartz fibre reinforced epoxy composite material honeycomb sandwich board substrate, bonding agent is substrate epoxy resin of the same race used.Obtain sample 3.
Sample 1 and sample 3 are cut into each 100 pieces of the unified fritter of size, detect the properties of FSS sample 1 and 3 by existing method, the results are shown in Table 1.Thermal mismatching rate is in 100 sample fritters, with in 3 hours from room temperature near-50 DEG C, keeps 10 minutes, then is warmed up to 110 DEG C, keep ten minutes, then to be cooled to room temperature be a temperature cycles.After 10 temperature cycles, the ratio that the FSS paster quantity of the top layer unsticking on substrate obtains divided by total number of samples.He Ne laser effect adopts the wave penetrate capability insertion loss (unit dB) of similar frequency bands to characterize.
Table 1 sample 1 and sample 3 properties testing result table
| Sample number into spectrum | Thermal mismatching rate | He Ne laser effect |
| 1 | 0 | 0.90dB |
| 3 | 12％ | 0.88dB |
From table 1, the He Ne laser effect of FSS provided by the invention and common metal FSS is suitable, can effectively reduce thermal mismatching rate simultaneously.
Clear scope of the present invention is not restricted to example discussed above by those skilled in the art, likely carries out some changes and amendment to it, and does not depart from the scope of the present invention of appended claims restriction.Although detailed icon and describe the present invention in the accompanying drawings and the description, such explanation and to describe be only to illustrate or schematically, and nonrestrictive.The present invention is not limited to the disclosed embodiments.
By to accompanying drawing, the research of specification and claims, it will be appreciated by those skilled in the art that when implementing of the present invention and realize the distortion of the disclosed embodiments.In detail in the claims, term " comprises " does not get rid of other steps or element, and indefinite article " " or " one " are not got rid of multiple.The fact of some measure of quoting in mutually different dependent claims does not mean that the combination of these measures can not be advantageously used.Any reference marker in claims does not form the restriction to scope of the present invention.
Claims (9)
1. a graphene film frequency-selective surfaces, is characterized in that, comprise substrate and be arranged at the graphene film layer on described substrate, described substrate is FRP composite material; Described graphene film layer is the periodicity graphene film of perforate or the graphene film paster of periodic arrangement.
2. graphene film frequency-selective surfaces according to claim 1, is characterized in that, described graphene film layer is graphene conductive film or doped graphene composite membrane.
3. graphene film frequency-selective surfaces according to claim 1, is characterized in that, described graphene film layer conductivity is not less than 1 × 10
5s/m.
4. graphene film frequency-selective surfaces according to claim 1, is characterized in that, described graphene film layer surface is provided with cross-shaped through hole, Y shape, the periodicity perforate of square, circular or Jerusalem cell configuration or chip unit.
5. graphene film frequency-selective surfaces according to claim 1, is characterized in that, described FRP composite material is battenboard, laminate or cambered shell structure; Described battenboard comprises two-layer panel layer and is located in the laminboard layer between two-layer described panel, and described panel layer is that quartz fibre reinforced epoxy or quartz fibre enhancing cyanate ester resin are made; Described laminboard layer is that honeycomb or foam are made.
6. according to the graphene film frequency-selective surfaces described in Claims 1 to 5, it is characterized in that, described graphene film layer thickness is 10 ~ 100 μm.
7. a preparation method for the graphene film frequency-selective surfaces according to any one of claim 1 ~ 6, is characterized in that, comprises the step that graphene film surface with preset pattern affixes to FRP composite material.
8. graphene film frequency-selective surfaces according to claim 7, is characterized in that, described preset pattern is printed by laser ablation or 3D and obtains.
9. one kind comprises the radome of the graphene film frequency-selective surfaces according to any one of claim 1 ~ 6.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356638A (en) * | 2016-10-14 | 2017-01-25 | 西安电子科技大学 | Absorption-rate-adjustable bandwidth electromagnetic wave absorber based on graphene film |
| CN107785667A (en) * | 2017-10-27 | 2018-03-09 | 中国人民解放军国防科技大学 | Energy selection surface based on additive machining conductive material and manufacturing method of product |
| CN107993284A (en) * | 2017-11-20 | 2018-05-04 | 上海无线电设备研究所 | A kind of curved face unit array modeling methods |
| CN108428977A (en) * | 2018-04-12 | 2018-08-21 | 北京邮电大学 | Terahertz broadband band-pass filter based on frequency-selective surfaces |
| CN108504038A (en) * | 2018-03-19 | 2018-09-07 | 天津大学 | A kind of absorbing meta-material and preparation method of graphite paper epoxy resin |
| CN112186363A (en) * | 2020-09-24 | 2021-01-05 | 武汉汉烯科技有限公司 | Flexible macroscopic graphene frequency selective surface |
| CN113193379A (en) * | 2021-04-14 | 2021-07-30 | 哈尔滨工业大学 | Design method of S/C dual-band multi-layer tunable frequency selection surface |
| CN113239419A (en) * | 2021-04-14 | 2021-08-10 | 哈尔滨工业大学 | Design method of honeycomb structure tunable super surface based on thickness and size change |
| CN114703565A (en) * | 2022-04-21 | 2022-07-05 | 常州富烯科技股份有限公司 | Graphene fiber, graphene fiber reinforced heat conduction gasket and preparation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001003A (en) * | 2012-12-13 | 2013-03-27 | 大连理工大学 | Manual electromagnetic metamaterial based on topology and graphene material and having tunable gradient force traps |
| CN103143319A (en) * | 2013-03-01 | 2013-06-12 | 暨南大学 | Graphene/clay composite material, and preparation method and application thereof |
| CN104049426A (en) * | 2014-07-11 | 2014-09-17 | 南京大学 | Bandwidth adjustable liquid crystal terahertz wave plate based on porous graphene transparent electrode |
| CN104763100A (en) * | 2015-03-06 | 2015-07-08 | 中国人民解放军国防科学技术大学 | A shelter large plate having a radar stealth function and a bulletproof function and a preparing method thereof |
-
2015
- 2015-10-19 CN CN201510677859.0A patent/CN105161803B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001003A (en) * | 2012-12-13 | 2013-03-27 | 大连理工大学 | Manual electromagnetic metamaterial based on topology and graphene material and having tunable gradient force traps |
| CN103143319A (en) * | 2013-03-01 | 2013-06-12 | 暨南大学 | Graphene/clay composite material, and preparation method and application thereof |
| CN104049426A (en) * | 2014-07-11 | 2014-09-17 | 南京大学 | Bandwidth adjustable liquid crystal terahertz wave plate based on porous graphene transparent electrode |
| CN104763100A (en) * | 2015-03-06 | 2015-07-08 | 中国人民解放军国防科学技术大学 | A shelter large plate having a radar stealth function and a bulletproof function and a preparing method thereof |
Non-Patent Citations (3)
| Title |
|---|
| APPL. PHYS.等: ""Tunable Graphene Reflective Cells for THz Reflectarrays and Generalized Law of Reflection"", 《APPL. PHYS. LETT.》 * |
| KONSTANTINOS KONSTANTINIDIS等: ""Design of Fabry-Perot Cavity Antenna at 94 GHz"", 《2012 LOUGHBOROUGH ANTENNAS & PROPAGATION CONFERENCE》 * |
| 许莹莹: ""基于石墨烯及其和大带宽频率选择表面的研究"", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356638A (en) * | 2016-10-14 | 2017-01-25 | 西安电子科技大学 | Absorption-rate-adjustable bandwidth electromagnetic wave absorber based on graphene film |
| CN106356638B (en) * | 2016-10-14 | 2019-05-07 | 西安电子科技大学 | Suction wave rate adjustable type wideband electromagnetic wave absorbing device based on graphene film |
| CN107785667A (en) * | 2017-10-27 | 2018-03-09 | 中国人民解放军国防科技大学 | Energy selection surface based on additive machining conductive material and manufacturing method of product |
| CN107993284A (en) * | 2017-11-20 | 2018-05-04 | 上海无线电设备研究所 | A kind of curved face unit array modeling methods |
| CN108504038A (en) * | 2018-03-19 | 2018-09-07 | 天津大学 | A kind of absorbing meta-material and preparation method of graphite paper epoxy resin |
| CN108428977A (en) * | 2018-04-12 | 2018-08-21 | 北京邮电大学 | Terahertz broadband band-pass filter based on frequency-selective surfaces |
| CN112186363A (en) * | 2020-09-24 | 2021-01-05 | 武汉汉烯科技有限公司 | Flexible macroscopic graphene frequency selective surface |
| CN113193379A (en) * | 2021-04-14 | 2021-07-30 | 哈尔滨工业大学 | Design method of S/C dual-band multi-layer tunable frequency selection surface |
| CN113239419A (en) * | 2021-04-14 | 2021-08-10 | 哈尔滨工业大学 | Design method of honeycomb structure tunable super surface based on thickness and size change |
| CN114703565A (en) * | 2022-04-21 | 2022-07-05 | 常州富烯科技股份有限公司 | Graphene fiber, graphene fiber reinforced heat conduction gasket and preparation method |
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