CN102316711B - Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof - Google Patents
Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof Download PDFInfo
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- CN102316711B CN102316711B CN201110170415.XA CN201110170415A CN102316711B CN 102316711 B CN102316711 B CN 102316711B CN 201110170415 A CN201110170415 A CN 201110170415A CN 102316711 B CN102316711 B CN 102316711B
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Abstract
The invention relates to a wave-absorbing stealthy material with an active carbon-fiber felt screen (ACFFS) structure and a preparation method thereof. The wave-absorbing stealthy material with an ACFFS structure is characterized in that an ACFFS is taken as a wave-absorbing body, glass fibers are filled in a structure unit of the circuit screen, and the surface of the circuit screen is covered with a glass fiber fabric so as to form a composite wave-absorbing stealthy material. The preparation method provided by the invention comprises the following steps: uniformly stirring epoxy resins and a curing agent, and pouring the obtained mixture into a mold; then, putting an ACFFS into the obtained product, and enabling the ACFFS to be infiltrated completely; filling glass fiber sheets into a grating of the circuit screen; and covering a layer of glass fiber fabric on the surfaces of the glass fiber sheets; and sequentially carrying out bubble removal and curing on the obtained object so as to obtain the stealthy material. The stealthy material provided by the invention is excellent in wave-absorbing property, and has the advantages of good mechanical property, lower density and the like; the stealthy material is a high-quality wave-absorbing material which meets the requirements for 'thin, light, wide and strong' properties; and the stealthy material is simple in preparation process, simple and feasible in operation, low in cost for raw materials, and simple in used equipment, therefore, the stealthy material has a good application prospect.
Description
Technical field
The invention belongs to wave-absorbing and camouflage Material Field, particularly a kind of active carbon-fiber felt screen structure wave-absorbing and camouflage material.
Background technology
Wave-absorbing and camouflage material is the important material of a class, it not only has special strategic position at the military aspects such as fight capability that improve the military weapons such as fighter plane, submarine, guided missile, simultaneously at electromagnetic shielding, build the civil areas such as anti-spoke and also have the status of not replacing.Absorbing material, by its moulding and bearing capacity, can be divided into coating type absorbing material and the large class of structure-type wave-absorption material two.Coating type absorbing material has that preparation technology is simple, easy to use, the easy advantage such as adjusting of parameter, but weatherability is poor, bad adhesion, the scope of application of this class material that can not stand the drawbacks limit such as high temperature.And structure-type wave-absorption material has the payload that can improve material, can reduce again the two-fold advantage of the Radar Cross Section of material, thereby be subject to more and more researchers' attention.Wherein carbon fiber structural wave-absorbing material is a main class formation absorbing material, can be used for the high-quality absorbing material of preparation " thin, light, wide, strong ", and has been successfully applied to the Stealth weapons such as invisbile plane and stealth missile.Meanwhile, circuit screen structural wave-absorbing material, due to can design freedom large, be easy to launch the excellent properties such as bandwidth, be subject to increasing attention.The material of circuit screen adopts metal, carbon felt or conducting polymer composite conventionally, and construction unit has the various shapes such as rectangle, cross, triangle, by changing the structural parameters of circuit screen, can obtain desired microwave absorbing property.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of active carbon-fiber felt screen structure wave-absorbing and camouflage material and preparation method thereof, and this Absorbing Materials is good, also has good mechanical property, lower advantages such as density simultaneously.
A kind of active carbon-fiber felt screen structure wave-absorbing and camouflage material of the present invention, it is characterized in that: take active carbon-fiber felt screen as wave-absorber, glass fibre is filled to the construction unit of circuit screen, at circuit screen surfaces, is coated with glass fabric, forms composite wave-absorbing stealth material.
The geometry of the construction unit of described active carbon-fiber felt screen is square, rectangle or triangle.
Described construction unit is for being uniformly distributed or cross-distribution.
Described glass fibre is E type glass fibre, and filament diameter is 15～17 μ m, and the geometry of glass fibre is consistent with the geometry of carbon felt circuit screen construction unit, and the size of glass fiber sheets is equal to or less than the size of carbon felt circuit screen construction unit.
The preparation method of a kind of active carbon-fiber felt screen structure wave-absorbing and camouflage material of the present invention, comprising:
(1) epoxy resin (E-44 type) is mixed and stirred with mass ratio 4:1～5:1 with curing agent (T-31 type), mixed solution is evenly coated on compact arranged glass fibre, remove after bubble, at 45～60 ℃, solidify 12～18 hours, make glass fiber sheets;
(2) mixed solution in step (1) is cast in mould, afterwards active carbon-fiber felt screen being put into mould fully infiltrates, above-mentioned glass fiber sheets is filled in the grid of circuit screen, at circuit screen surfaces, cover layer of glass cloth, remove after bubble, at 45～60 ℃, solidify 12～18 hours, obtain.
Mixed solution in described step (2) is highly 4～5mm in mould.
Structure wave-absorbing and camouflage material prepared by the present invention carries out absorbing property when test, can be respectively under the arragement direction that meets the glass fibre of filling and horizontal plane keeping parallelism or vertical condition, tests.
The situation of impedance matching or the degree of coupling have and consequence at the design aspect of absorbing material, be absorbing material researcher and the common recognition reached of Production design personnel.For Multilayer Microwave Absorption Materials, not only require the impedance of material surface and the impedance phase of atmosphere to approach, the matching of material internal impedance also can not be ignored.Therefore, the electromagnetic wave transparent materials such as glass fibre, aramid fiber and wave-absorber are effectively arranged in pairs or groups, combined, make the electromagnetic overwhelming majority or all penetrate wave-absorber, and then bring into play to greatest extent the effect of wave-absorber, frequency range can not only be expanded, also good wave-absorbing effect can be obtained.
The glass fabric of material surface monoblock of the present invention can regulate the matching of material surface impedance and atmosphere impedance, makes the external electromagnetic wave energy overwhelming majority or all penetrates material internal.Meanwhile, the good active carbon-fiber felt screen of the absorbing property of take is wave-absorber, from the most fundamentally having guaranteed the wave-absorbing effect of material.In addition, the glass fiber sheets with wave penetrate capability is filled in the construction unit of circuit screen, can change by effective combination of glass fiber sheets and wave-absorber the impedance of inhaling ripple layer, bring into play to greatest extent the suction ripple effect of wave-absorber, further improve the wave-absorbing and camouflage performance of material.
Beneficial effect
(1) absorbing property of the present invention is good, can effectively absorb, the electromagnetic wave of the incident that decays under 2～18GHz, has wider effective bandwidth (reflection loss-frequency bandwidth below 10dB), can reach-40dB of reflection loss value;
(2) the present invention is the epoxy resin-base composite material that a kind of carbon fibers/fiberglass strengthens, when thering is good wave-absorbing and camouflage performance, also having good mechanical property, lower advantages such as density, is a kind of high-quality absorbing material that meets " thin, light, wide, strong " performance requirement;
(3) preparation technology of the present invention is simple, operation is simple, and the cost of raw material is lower, and device therefor is simple, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is preparation process schematic diagram of the present invention;
Fig. 2 is the process schematic diagram of filled glass fiber;
Fig. 3 is the active carbon-fiber felt screen schematic diagram (black is activated carbon-fiber felt part, and white is the pore structure of digging out on carbon felt, i.e. the construction unit of active carbon-fiber felt screen) of the embodiment of the present invention 1 rectangular configuration unit used;
Fig. 4 is the active carbon-fiber felt screen schematic diagram (black is activated carbon-fiber felt part, and white is the pore structure of digging out on carbon felt, i.e. the construction unit of active carbon-fiber felt screen) of the used square structure unit being interspersed of the embodiment of the present invention 2, embodiment 3;
Fig. 5 is the active carbon-fiber felt screen schematic diagram (black is activated carbon-fiber felt part, and white is the pore structure of digging out on carbon felt, i.e. the construction unit of active carbon-fiber felt screen) of the embodiment of the present invention 4 equally distributed square structure unit used;
Fig. 6 is the reflection loss curve of the absorbing material of embodiment 1 preparation;
Fig. 7 is the reflection loss curve of the absorbing material of embodiment 2 preparations;
Fig. 8 is the reflection loss curve of the absorbing material of embodiment 3 preparations;
Fig. 9 is the reflection loss curve (arragement direction of the glass fibre of filling and horizontal plane keeping parallelism) of the absorbing material of embodiment 4 preparations;
Figure 10 is the reflection loss curve (arragement direction of the glass fibre of filling keeps vertical with horizontal plane) of the absorbing material of embodiment 4 preparations.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
(1) E-44 type epoxy resin mixed and stirred with mass ratio 4:1 with T-31 type curing agent, mixed solution is evenly coated on compact arranged glass fibre, removing after bubble, at 45 ℃, solidifying 12 hours, making glass fiber sheets;
(2) mixed solution in step (1) being cast to volume is 200 * 200 * 10mm
3mould in, afterwards by 200 * 200mm
2rectangular configuration unit activity carbon felt circuit screen put into mould and fully infiltrate, above-mentioned glass fiber sheets is filled in the grid of circuit screen, at circuit screen surfaces covering one deck 200 * 200mm
2glass fabric, remove after bubble, at 50 ℃, solidify 12 hours, obtain glass fibre filled active carbon-fiber felt screen structure wave-absorbing and camouflage material.
The rectangular configuration unit activity carbon felt circuit of take screen is wave-absorber, the long L=30mm of rectangular configuration unit, wide W=15mm, gap H-W=5mm.The size and shape of the glass fiber sheets of filling is consistent with circuit screen construction unit, and long is 30mm, and wide is the rectangle glass fiber sheets of 15mm.
Fig. 6 is the reflection loss curve of the absorbing material of embodiment 1 preparation, the present embodiment material has in 2.3-18GHz frequency range-and absorption below 10dB, effective bandwidth is 15.7GHz, decay to-34.9dB of maximum reflection.
(1) E-44 type epoxy resin mixed and stirred with mass ratio 5:1 with T-31 type curing agent, mixed solution is evenly coated on compact arranged glass fibre, removing after bubble, at 50 ℃, solidifying 18 hours, making glass fiber sheets;
(2) mixed solution in step (1) being cast to volume is 200 * 200 * 10mm
3mould in, afterwards by 200 * 200mm
2the square structure unit activity carbon felt circuit being interspersed screen put into mould and fully infiltrate, above-mentioned glass fiber sheets is filled in the grid of circuit screen, at circuit screen surfaces covering one deck 200 * 200mm
2glass fabric, remove after bubble, at 60 ℃, solidify 18 hours, obtain glass fibre filled active carbon-fiber felt screen structure wave-absorbing and camouflage material.
The active carbon-fiber felt screen of the square structure unit that is interspersed of take is wave-absorber, the long L=30mm of square structure unit, gap H-L=5mm.The size and shape of the glass fiber sheets of filling is consistent with circuit screen construction unit, the square glass fibre plate that length of side is 30mm.
Fig. 7 is the reflection loss curve of the absorbing material of embodiment 2 preparation, the present embodiment material has in 11.7-18GHz frequency range-and absorption below 10dB, effective bandwidth is 6.3GHz, decay to-27.6dB of maximum reflection.
Embodiment 3
(1) E-44 type epoxy resin mixed and stirred with mass ratio 4.5:1 with T-31 type curing agent, mixed solution is evenly coated on compact arranged glass fibre, removing after bubble, at 55 ℃, solidifying 14 hours, making glass fiber sheets;
(2) mixed solution in step (1) being cast to volume is 200 * 200 * 10mm
3mould in, afterwards by 200 * 200mm
2the square structure unit activity carbon felt circuit being interspersed screen put into mould and fully infiltrate, above-mentioned glass fiber sheets is filled in the grid of circuit screen, at circuit screen surfaces covering one deck 200 * 200mm
2glass fabric, remove after bubble, at 55 ℃, solidify 12 hours, obtain glass fibre filled active carbon-fiber felt screen structure wave-absorbing and camouflage material.
The active carbon-fiber felt screen of the square structure unit that is interspersed of take is wave-absorber, the long L=30mm of square structure unit, gap H-L=5mm.The glass fiber sheets of filling is that the length of side is the square glass fibre plate of 25mm, and glass fiber sheets is placed between two parties in circuit screen construction unit.
Fig. 8 is the reflection loss curve of the absorbing material of embodiment 3 preparation, the present embodiment material has in 9.1-18GHz frequency range-and absorption below 10dB, effective bandwidth is 8.9GHz, decay to-31.5dB of maximum reflection.
(1) E-44 type epoxy resin mixed and stirred with mass ratio 5:1 with T-31 type curing agent, mixed solution is evenly coated on compact arranged glass fibre, removing after bubble, at 45 ℃, solidifying 16 hours, making glass fiber sheets;
(2) mixed solution in step (1) being cast to volume is 200 * 200 * 10mm
3mould in, afterwards by 200 * 200mm
2equally distributed square structure unit activity carbon felt circuit screen put into mould and fully infiltrate, above-mentioned glass fiber sheets is filled in the grid of circuit screen, at circuit screen surfaces covering one deck 200 * 200mm
2glass fabric, remove after bubble, at 60 ℃, solidify 18 hours, obtain glass fibre filled active carbon-fiber felt screen structure wave-absorbing and camouflage material.
The active carbon-fiber felt screen of equally distributed square structure unit of take is wave-absorber, the long L=30mm of square structure unit, gap H-L=5mm, this circuit screen Central Symmetry.The glass fiber sheets of filling is that the length of side is the square glass fibre plate of 20mm, and glass fiber sheets is placed between two parties in circuit screen construction unit, and in filling process, guarantees that in glass fiber sheets, glass fibre arragement direction is consistent.
Fig. 9 is the absorbing material of embodiment 4 preparation, the reflection loss curve recording when meeting the arragement direction of the glass fibre of filling and horizontal plane keeping parallelism.Under this test condition, the present embodiment material has in 10.3-18GHz frequency range-absorption below 10dB, effective bandwidth is 7.7GHz, decay to-39.3dB of maximum reflection.
Figure 10 is the absorbing material of embodiment 4 preparations, the reflection loss curve recording when the arragement direction that meets the glass fibre of filling keeps vertical with horizontal plane.Under this test condition, the present embodiment material has in 10.6-18GHz frequency range-absorption below 10dB, effective bandwidth is 7.4GHz, decay to-24.5dB of maximum reflection.
Claims (3)
1. an active carbon-fiber felt screen structure wave-absorbing and camouflage material, is characterized in that: take active carbon-fiber felt screen as wave-absorber, glass fibre is filled to the construction unit of circuit screen, at circuit screen surfaces, is coated with glass fabric, forms composite wave-absorbing stealth material; Wherein, described glass fibre is E type glass fibre, and filament diameter is 15～17 μ m, and the geometry of glass fiber sheets is consistent with the geometry of carbon felt circuit screen construction unit, and the size of glass fiber sheets is equal to or less than the size of carbon felt circuit screen construction unit.
2. a kind of active carbon-fiber felt screen structure wave-absorbing and camouflage material according to claim 1, is characterized in that: the geometry of the construction unit of described active carbon-fiber felt screen is square, rectangle or triangle.
3. a kind of active carbon-fiber felt screen structure wave-absorbing and camouflage material according to claim 2, is characterized in that: described construction unit is for being uniformly distributed or cross-distribution.
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| CN201110170415.XA CN102316711B (en) | 2011-06-22 | 2011-06-22 | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof |
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| CN201110170415.XA CN102316711B (en) | 2011-06-22 | 2011-06-22 | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof |
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| CN104610910B (en) * | 2015-01-15 | 2017-03-29 | 东华大学 | It is a kind of to absorb ripple composite and preparation method thereof containing the upright wand that is chopped |
| CN106626619B (en) * | 2016-12-07 | 2018-08-03 | 中国航空工业集团公司北京航空材料研究院 | A kind of Wave suction composite material of load circular patch Meta Materials |
| CN112776372B (en) * | 2021-01-15 | 2023-03-07 | 中北大学 | Structural-function integrated continuous fiber resin-based wave-absorbing stealth composite material and preparation method thereof |
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| CN1599551A (en) * | 2004-08-30 | 2005-03-23 | 天津大学 | Circuit analog wave absorbing material using active carbon felt as absorbent and its preparation method |
| CN1730555A (en) * | 2005-09-05 | 2006-02-08 | 天津大学 | Novel light-wave absorbing carbon fiber composite material preparation method |
| CN101402256A (en) * | 2008-09-05 | 2009-04-08 | 中国船舶重工集团公司第七二五研究所 | Compression moulding forming method with wet-process for wave-suction composite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005028996A (en) * | 2003-07-11 | 2005-02-03 | Nsk Ltd | Shaft coupling device for vehicle steering device |
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Patent Citations (3)
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|---|---|---|---|---|
| CN1599551A (en) * | 2004-08-30 | 2005-03-23 | 天津大学 | Circuit analog wave absorbing material using active carbon felt as absorbent and its preparation method |
| CN1730555A (en) * | 2005-09-05 | 2006-02-08 | 天津大学 | Novel light-wave absorbing carbon fiber composite material preparation method |
| CN101402256A (en) * | 2008-09-05 | 2009-04-08 | 中国船舶重工集团公司第七二五研究所 | Compression moulding forming method with wet-process for wave-suction composite material |
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| JP特开2005-28996A 2002.01.29 |
| 徐海霞等.碳纤维/玻璃纤维复合纤维毡的节点和吸波性能.《精细化工》.2009,第26卷(第11期),全文. |
| 活性碳纤维/树脂复合吸波材料的设计;邹田春等;《功能材料与器件学报》;20070228;第13卷(第1期);全文 * |
| 碳纤维/玻璃纤维复合纤维毡的节点和吸波性能;徐海霞等;《精细化工》;20091130;第26卷(第11期);全文 * |
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Inventor after: Wu Qilin Inventor after: Li Liwei Inventor after: Cang Yongju Inventor after: Xia Shaoxu Inventor after: Han Hao Inventor after: Quan Haiyu Inventor after: Qin Wenzhen Inventor before: Wu Qilin Inventor before: Li Liwei Inventor before: Han Hao Inventor before: Quan Haiyu Inventor before: Qin Wenzhen |
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