CN102229267A - Hybrid fiber reinforced resin matrix sandwich structural absorbing material and its preparation method - Google Patents
Hybrid fiber reinforced resin matrix sandwich structural absorbing material and its preparation method Download PDFInfo
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- CN102229267A CN102229267A CN2011100863981A CN201110086398A CN102229267A CN 102229267 A CN102229267 A CN 102229267A CN 2011100863981 A CN2011100863981 A CN 2011100863981A CN 201110086398 A CN201110086398 A CN 201110086398A CN 102229267 A CN102229267 A CN 102229267A
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Abstract
The invention discloses a hybrid fiber reinforced resin matrix sandwich structural absorbing material and its preparation method. The absorbing material has a multifunctional laminated structure from the outside to the inside comprising a first dielectric layer, an absorbed layer, a second dielectric layer and a reflecting layer, wherein the first dielectric layer and the second dielectric layer are both composed of a glass fiber reinforced resin matrix composite material; the absorbed layer is composed of a continuous silicon carbide fiber reinforced resin matrix composite material; and the reflecting layer is composed of a carbon fiber reinforced resin matrix composite material. The preparation method of the absorbing material comprises the following steps of: firstly, each kind of fiber that satisfies each functional layer is selected; secondly, with the resin as the matrix, according to the laminated order and thickness of each functional layer, the absorbing material provided by the invention is prepared by the resin matrix composite material molding technology. The absorbing material provided by the invention has advantages of simple structure, good parameter tolerance, excellent wave absorbing function and low material cost, and furthermore is easy to mold.
Description
Technical field
The present invention is mainly concerned with the structural wave-absorbing material field, is specifically related to absorbing material that mixes fortifying fibre resin-based sandwich and preparation method thereof.
Background technology
Comparatively ripe at present absorbing material structure comprises Salisbury screen, Dallenbach screen, Jaumman wave-absorber, multilayer matching structure etc.Wherein Salisbury screen absorbent body frequency range is narrow; The Dallenbach absorber is subjected to the restriction of present material electromagnetic parameter frequency dispersion effect, is difficult to realize that wideband absorbs; Jaumann absorber simplicity of design, it is wide to absorb frequency range, but material thickness is more greatly its major defect; It is wide that multilayer coupling absorbing material absorbs frequency range, but design difficulty is big, and the difficulty comparatively of the material preparation with different dielectric properties.As seen, all there is certain deficiency in existing absorbing material.In addition, from the structural wave-absorbing material present Research, method comparatively commonly used at present is to add radar absorbent material to realize its absorbing property in composite, the interpolation of absorbent can cause harmful effects such as the deterioration of composite materials property and density increase, and the stability of material absorbing property also is difficult to guarantee.
Summary of the invention
Technical problem to be solved by this invention is: at the deficiencies in the prior art, provide a kind of parameter tolerance good, inhale wave energy good, integrate inhale ripple and bearing function and simple in structure, be easy to the absorbing material that moulding, lower cost for material, assorted fibre that cost performance is high strengthen resin-based sandwich, and the corresponding method that this resin-based sandwich absorbing material of preparation is provided.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of assorted fibre strengthens the absorbing material of resin-based sandwich, be one to comprise the multi-functional layer superimposed type structure in first dielectric layer, absorbed layer, second dielectric layer and reflecting layer from outside to inside successively, wherein, first dielectric layer and the second dielectric layer fibreglass strengthen polymer matrix composites and constitute, absorbed layer strengthens polymer matrix composites by continuous carbofrax fibre and constitutes, and the reflecting layer is made of carbon fiber enhancement resin base composite material.
Above-mentioned assorted fibre strengthens the absorbing material of resin-based sandwich, and the resistivity of continuous carbofrax fibre is preferably 0.6 Ω cm ~ 1 Ω cm in the absorbed layer.
As to further improvement in the technical proposal, the thickness of first dielectric layer is preferably 2.2mm～2.4mm, the thickness of absorbed layer is preferably 0.34mm～0.38mm, and the thickness of second dielectric layer is preferably 2.3mm～2.5mm, and the thickness in reflecting layer is preferably 0.5mm～1.0mm.
As a total inventive concept, the present invention also provides above-mentioned assorted fibre to strengthen the preparation method of the absorbing material of resin-based sandwich, comprises following processing step:
(1) chooses glass fabric, continuous carbofrax fibre cloth and the carbon cloth that satisfies each functional layer requirement;
(2) with the resin be matrix,, adopt processing of polymer matrix composites technology, make the absorbing material that assorted fibre strengthens resin-based sandwich according to each functional layer overlay order and thickness.
As to further improvement in the technical proposal, described resin is finger ring epoxy resins, unsaturated polyester (UP) or acrylic resin preferably, and the preferred processing of polymer matrix composites technology that matches therewith is manual pasting forming process.
As to further improvement in the technical proposal, described resin is finger ring epoxy resins, unsaturated polyester (UP) or phenolic resins preferably, and the preferred processing of polymer matrix composites technology that matches therewith is die press technology for forming.
Compared with prior art, the invention has the advantages that:
Assorted fibre of the present invention strengthens the absorbing material of resin-based sandwich, and as reinforcing material, this absorbing material has toughness and intensity preferably with glass fibre, carbon fiber and continuous carbofrax fibre, makes it at first can provide bearing function; What is more important, because absorbing material of the present invention has multi-functional superimposed type structure, make the dielectric properties of each layer be approximate gradient distribution, and has matching properties preferably, electromagnetic wave can incide absorbing material inside as far as possible and effectively be absorbed, this makes absorbing material of the present invention not add in addition under the situation of radar absorbent material, has the electromagnetic function of good absorption, therefore, this absorbing material has good wideband microwave absorbing property and mechanical property, the alternative glass-reinforced plastic material that only has single bearing function at present, also can be used as the substitute of metal current parts, under the prerequisite that satisfies the parts instructions for use, give its good radar-wave absorbing function.
Simultaneously, serve as the glass fibre of the reinforcing material of first dielectric layer and second dielectric layer, and the carbon fiber that serves as the reinforcing material in reflecting layer, all can adopt ripe industrialization fiber product, therefore, can reduce material cost greatly.
In addition, because the special construction of absorbing material of the present invention can be realized the wideband microwave absorbing property under the less situation of thickness, this just can effectively alleviate product weight, satisfies the lightweight demand of parts.
Because absorbing material structure of the present invention is simple relatively, its raw material sources are extensive, can prepare moulding by existing conventional processing of polymer matrix composites technology, and the whole preparation process step is simple, can effectively be applied to suitability for industrialized production.
Description of drawings
Fig. 1 is the structural representation that assorted fibre of the present invention strengthens the absorbing material of resin-based sandwich; Wherein, 1, first dielectric layer; 2, absorbed layer; 3, second dielectric layer; 4, reflecting layer.
Fig. 2 is the reflectance curve figure that the assorted fibre of embodiment 1 preparation strengthens the absorbing material of resin-based sandwich.
Fig. 3 is the reflectance curve figure that the assorted fibre of embodiment 2 preparations strengthens the absorbing material of resin-based sandwich.
The specific embodiment
The present invention is further illustrated below in conjunction with specific embodiment and accompanying drawing.
As shown in Figure 1, a kind of assorted fibre of the present invention strengthens the absorbing material of resin-based sandwich, be one to comprise the multi-functional layer superimposed type structure in first dielectric layer 1, absorbed layer 2, second dielectric layer 3 and reflecting layer 4 from outside to inside successively, wherein, first dielectric layer 1 and second dielectric layer, 3 fibreglass strengthen polymer matrix composites and constitute, the TM glass fabric serves as reinforcing material, and first dielectric layer, 1 gross thickness is 2.3mm, and second dielectric layer, 3 gross thickness are 2.4mm; Absorbed layer 2 strengthens polymer matrix composites by continuous carbofrax fibre and constitutes, and continuous carbofrax fibre serves as reinforcing material, and its resistivity is 0.81 Ω cm, and absorbed layer 2 gross thickness are 0.35mm; Reflecting layer 4 is made of carbon fiber enhancement resin base composite material, and the T300 carbon cloth is a reinforcing material, and the reflecting layer gross thickness is 0.6mm.
The assorted fibre for preparing this example strengthens the method for the absorbing material of resin-based sandwich, comprises following concrete processing step:
(1) chooses TM glass fabric, T300 carbon cloth and the continuous carbofrax fibre cloth that satisfies each functional layer requirement;
(2) with phenolic resins be matrix, adopt die press technology for forming moulding resin based composites, concrete steps are: phenolic resins and acetone are mixed with phenol resin solution according to mass ratio at 1: 1, then phenol resin solution is evenly brushed on above-mentioned various fiber cloth, room temperature hangs 24h, makes prepreg; Prepreg is trimmed to 180mm * 180mm, according to shop layer order and each layer thickness, prepreg is spread in the punching block, heating rate with 2 ℃/min is warming up to 80 ℃, pressurization 1.5MPa, and then be warming up to 150 ℃ of pressurize 2h with the heating rate of 2 ℃/min, and be chilled to the room temperature demoulding naturally, obtain assorted fibre (glass fibre, silicon carbide fibre and carbon fiber) and strengthen resin-based sandwich absorbing material.
The assorted fibre that makes through above-mentioned steps strengthen resin-based sandwich absorbing material the actual measurement reflectance curve as shown in Figure 2, mechanical property is as shown in table 1 below.By test result as seen, all less than-10dB, mechanical property is suitable with simple glass steel material at 8GHz～18GHz for the reflectivity of the absorbing material of embodiment 1 preparation, has to carry preferably and inhale wave energy.
Table 1: the absorbing material mechanical property of the resin-based sandwich of mould pressing process preparation
| Density (g/cm 3） | Bending strength (MPa) | Modulus (GPa) |
| 1.78 | 410.2 | 19.2 |
As shown in Figure 1, another kind of assorted fibre of the present invention strengthens the absorbing material of resin-based sandwich, be one to comprise first dielectric layer 1 from outside to inside successively, absorbed layer 2, the multi-functional layer superimposed type structure in second dielectric layer 3 and reflecting layer 4, wherein, first dielectric layer 1 and second dielectric layer, 3 fibreglass strengthen polymer matrix composites and constitute, the E glass fabric serves as reinforcing material, first dielectric layer, 1 gross thickness is 2.2mm, second dielectric layer, 3 gross thickness are 2.3mm, absorbed layer 2 strengthens polymer matrix composites by continuous carbofrax fibre and constitutes, continuous carbofrax fibre serves as reinforcing material, its resistivity is 0.92 Ω cm, and absorbed layer 2 gross thickness are 0.36mm, and reflecting layer 4 is made of carbon fiber enhancement resin base composite material, the T300 carbon cloth serves as reinforcing material, and the reflecting layer gross thickness is 0.8mm.
The assorted fibre for preparing this example strengthens the method for the absorbing material of resin-based sandwich, comprises following concrete processing step:
(1) chooses E glass fabric, T300 carbon cloth and the continuous carbofrax fibre cloth that satisfies each functional layer requirement;
(2) be matrix with E-44 epoxy resin, adopt hand to stick with paste the technological forming polymer matrix composites, concrete steps are: choose mass ratio and be 100: 10: 10 E-44 epoxy resin, diethylenetriamine (as curing agent) and acetone (as diluent), then the three is stirred, according to shop layer order and each layer thickness, adopt hand to stick with paste the technological forming composite, through 60 ℃ of curing 4h, obtain assorted fibre (glass fibre, silicon carbide fibre and carbon fiber) and strengthen resin-based sandwich absorbing material.
The absorbing material that assorted fibre after solidifying is strengthened resin-based sandwich cuts into 180 * 180mm, as specimen.Through test experiments, the resin-based sandwich reflection index of wave suction material curve of sticking with paste the technology preparation by hand as shown in Figure 3, mechanical property is as shown in table 2.By test result as seen, all less than-10dB, mechanical property is suitable with simple glass steel material at 8GHz ~ 18GHz for the reflectivity of the absorbing material of embodiment 2 preparation, has to carry preferably and inhale wave energy.
Table 2: hand is stuck with paste the absorbing material mechanical property of the resin-based sandwich of technology preparation
| Density (g/cm 3） | Bending strength (MPa) | Modulus (GPa) |
| 1.68 | 364.1 | 16.7 |
Claims (6)
1. an assorted fibre strengthens the absorbing material of resin-based sandwich, it is characterized in that, described absorbing material is one to comprise the multi-functional layer superimposed type structure in first dielectric layer, absorbed layer, second dielectric layer and reflecting layer from outside to inside successively, wherein, first dielectric layer and the second dielectric layer fibreglass strengthen polymer matrix composites and constitute, absorbed layer strengthens polymer matrix composites by continuous carbofrax fibre and constitutes, and the reflecting layer is made of carbon fiber enhancement resin base composite material.
2. assorted fibre according to claim 1 strengthens the absorbing material of resin-based sandwich, and it is characterized in that: the resistivity of continuous carbofrax fibre is 0.6 Ω cm～1 Ω cm in the described absorbed layer.
3. assorted fibre according to claim 1 and 2 strengthens the absorbing material of resin-based sandwich, it is characterized in that: the thickness of described first dielectric layer is 2.2mm～2.4mm, the thickness of described absorbed layer is 0.34mm～0.38mm, the thickness of described second dielectric layer is 2.3mm～2.5mm, and the thickness in described reflecting layer is 0.5mm～1.0mm.
4. one kind strengthens the preparation method of the absorbing material of resin-based sandwich as each described assorted fibre in the claim 1～3, comprises following processing step:
(1) chooses glass fabric, continuous carbofrax fibre cloth and the carbon cloth that satisfies each functional layer requirement;
(2) with the resin be matrix,, adopt processing of polymer matrix composites technology, make the absorbing material that assorted fibre strengthens resin-based sandwich according to the overlay order and the thickness of described each functional layer.
5. preparation method according to claim 4 is characterized in that: described resin is meant epoxy resin, unsaturated polyester (UP) or acrylic resin, and described processing of polymer matrix composites technology is manual pasting forming process.
6. preparation method according to claim 4 is characterized in that: described resin is meant epoxy resin, unsaturated polyester (UP) or phenolic resins, and described processing of polymer matrix composites technology is die press technology for forming.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103171173A (en) * | 2013-03-14 | 2013-06-26 | 中国人民解放军国防科学技术大学 | Carbon fiber electromagnetic wave absorbing material and preparation method thereof |
| CN103644770A (en) * | 2013-11-25 | 2014-03-19 | 衡阳泰豪通信车辆有限公司 | Radar-stealth and anti-penetration composite laminated board and production method thereof |
| CN105172267A (en) * | 2015-09-15 | 2015-12-23 | 中国人民解放军国防科学技术大学 | Polyimide-based sandwich-structure wave absorbing material and preparation method thereof |
| CN106542079A (en) * | 2016-11-25 | 2017-03-29 | 江西洪都航空工业集团有限责任公司 | A kind of structure-type wave-absorption eyelid covering method for designing |
| CN107200997A (en) * | 2017-05-22 | 2017-09-26 | 陕西科技大学 | A kind of structural wave-absorbing material of oxide nano thread silicon carbide fibre multi-scale reinforcing body reinforced resin base and preparation method thereof |
| CN107979967A (en) * | 2017-12-22 | 2018-05-01 | 沈阳山磊航空装备制造有限责任公司 | A kind of Wave suction composite material of honeycomb sandwich structure and preparation method thereof |
| CN112702900A (en) * | 2020-11-24 | 2021-04-23 | 南京航空航天大学 | Metamaterial wave absorber |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171173A (en) * | 2013-03-14 | 2013-06-26 | 中国人民解放军国防科学技术大学 | Carbon fiber electromagnetic wave absorbing material and preparation method thereof |
| CN103171173B (en) * | 2013-03-14 | 2015-05-13 | 中国人民解放军国防科学技术大学 | Carbon fiber electromagnetic wave absorbing material and preparation method thereof |
| CN103644770A (en) * | 2013-11-25 | 2014-03-19 | 衡阳泰豪通信车辆有限公司 | Radar-stealth and anti-penetration composite laminated board and production method thereof |
| CN105172267A (en) * | 2015-09-15 | 2015-12-23 | 中国人民解放军国防科学技术大学 | Polyimide-based sandwich-structure wave absorbing material and preparation method thereof |
| CN105172267B (en) * | 2015-09-15 | 2017-03-15 | 中国人民解放军国防科学技术大学 | A kind of polyimide-based sandwich absorbing material and preparation method thereof |
| CN106542079A (en) * | 2016-11-25 | 2017-03-29 | 江西洪都航空工业集团有限责任公司 | A kind of structure-type wave-absorption eyelid covering method for designing |
| CN107200997A (en) * | 2017-05-22 | 2017-09-26 | 陕西科技大学 | A kind of structural wave-absorbing material of oxide nano thread silicon carbide fibre multi-scale reinforcing body reinforced resin base and preparation method thereof |
| CN107200997B (en) * | 2017-05-22 | 2019-06-04 | 陕西科技大学 | A kind of structural wave-absorbing material and preparation method thereof of oxide nano thread-silicon carbide fibre multi-scale reinforcing body reinforced resin base |
| CN107979967A (en) * | 2017-12-22 | 2018-05-01 | 沈阳山磊航空装备制造有限责任公司 | A kind of Wave suction composite material of honeycomb sandwich structure and preparation method thereof |
| CN112702900A (en) * | 2020-11-24 | 2021-04-23 | 南京航空航天大学 | Metamaterial wave absorber |
| CN112702900B (en) * | 2020-11-24 | 2022-07-15 | 南京航空航天大学 | Metamaterial wave absorber |
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