CN104404814A - Wave-absorbing paper and preparation method and application thereof - Google Patents
Wave-absorbing paper and preparation method and application thereof Download PDFInfo
- Publication number
- CN104404814A CN104404814A CN201410459537.4A CN201410459537A CN104404814A CN 104404814 A CN104404814 A CN 104404814A CN 201410459537 A CN201410459537 A CN 201410459537A CN 104404814 A CN104404814 A CN 104404814A
- Authority
- CN
- China
- Prior art keywords
- wave
- fiber
- sandwich
- paper
- absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides wave-absorbing paper and a preparation method and application thereof. The wave absorbing paper contains 0.1-95 wt% of a fiber wave-absorbing agent and 5-99.9 wt% of wave-transparent fiber. The fiber wave-absorbing agent and wave-transparent fiber are mixed and prepared into the wave-absorbing paper by a papermaking process; and then the wave-absorbing paper as a lattice wall material is prepared into a wave-absorbing core sandwich; and then the wave-absorbing core sandwiches prepared from wave-absorbing paper with different fiber wave-absorbing agent content are separated by wave-permeable layers; and finally the entire structure is impregnated and cured to obtain the wave-absorbing material. The wave-absorbing material of the invention has the advantages of high wave-absorbing efficiency, stable wave-absorbing property, wide absorption band, and light weight and high strength.
Description
Technical field
The present invention relates to pulp technology for making paper, be specifically related to a kind of to there is the suction ripple paper and its preparation method and application inhaling wave energy.
Background technology
Along with high frequency electromagnetic radiation is used more and more widely at radar and communication field, the attention rate of people to electromagnetic shielding promotes day by day, also more and more higher to the requirement of absorbing material.Usually to the composite request of absorbing material be absorption efficiency high, absorb frequency range wide, quality is light, intensity is high.How to obtain the goal in research that the absorbing material simultaneously realizing above-mentioned requirements is this area research person always.
Absorbing material divides by application form can be divided into parastic absorbing material and the large class of structural absorbing mater ials two, and wherein parastic absorbing material is divided into again the types such as coating material, adhesive type sheet material, plated film; And structural absorbing mater ials is divided into laminate type and sandwiched, they have inhales ripple and carrying dual-use function.Divide radar absorbing can be divided into absorption-type absorbing material and interference absorbing material again by absorption mechanism, wherein absorption-type absorbing material utilizes material itself to absorb the loss of radar wave, makes a part of electromagnetic energy become heat energy loss to fall; And interference absorbing material utilizes suction ripple layer surface echo and bottom reflection wave amplitude equal amplitudes to carry out interference on the contrary to offset, its thickness need meet (wherein n >=0, d=λ/4+n λ/2, n is integer), the absorption band of this kind of absorbing material is narrow.
Microwave absorbing coating refers to Polymer Solution, emulsion or liquid high polymer for matrix, and wave absorbing agent and other supplementary elements are distributed to wherein and obtained absorbing material.Tradition microwave absorbing coating is usually to have the particle of electromagnetic consumable for wave absorbing agent, and it has the shortcomings such as absorption band is narrow, weight is large, adhesion strength is low, weatherability is poor.Other several parastic absorbing materials also have similar shortcoming.And structure Wave suction composite material is particularly inhaled ripple sandwich material and is had the advantages such as good structural-load-carrying capacity, density is little concurrently, in addition inhale ripple sandwich material, by sandwich absorbent structure, Multiple Scattering absorption is carried out to incident electromagnetic wave, thus radar wave energy of decaying to greatest extent also obtains excellent wideband wave-absorbing effect thus, therefore can meet structure, function integration requirement well, therefore have broad application prospects in Aeronautics and Astronautics field.
But, traditional suction ripple sandwich material, be mainly matrix with paper honeycomb as cellular sandwich material, the glue being mixed with wave absorbing agent by dipping is prepared from, and this preparation method's complex process, as wave absorbing agent is dispersed in glue by needs, and be often difficult to realize homogeneous impregnation containing during wave absorbing agent in glue, therefore the more difficult gradient realizing electromagnetic parameter controls, and be unfavorable for the optimization of impedance matching property, thus wideband wave-absorbing effect is unsatisfactory.In addition, easily there is absorbent peeling phenomenon in suction ripple sandwich material prepared by the method, pollute periphery electromagnetic environment, affect the stability of its absorbing property under long-time use.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, provide a kind of and there is suction ripple paper inhaling wave energy and its preparation method and application.The absorbing material wave absorbing efficiency comprising suction ripple paper of the present invention is high, absorbing property stable, absorb that frequency range is wide, quality light and excellent strength.
The object of the invention is to be achieved through the following technical solutions.
On the one hand, the invention provides a kind of suction ripple paper, this suction ripple paper bag is containing the fiber-like wave absorbing agent of 0.1-95wt% and the wave transparent fiber of 5-99.9wt%.
Preferably, described fiber-like wave absorbing agent is selected from magnetic fibre, conductive fiber, dielectric fibers and the doping type fiber with electromagnetic wave loss function, as one or more in polycrystalline iron fiber, nickel fiber, carbon fiber, copper fiber, silicon carbide fibre and SiC/Ti doping fiber; Preferably, described fiber-like wave absorbing agent is polycrystalline iron fiber.
Preferably, described wave transparent fiber is selected from the good inorfil of wave, high-performance synthetic fiber and pulp thereof, as one or more in p-aramid fiber fibrillation dissolving pulp, p-aramid fiber precipitating pulp, meta-aramid fibrillation dissolving pulp, polyparaphenylene Ben Bing bis-oxazole (PBO) fibrillation dissolving pulp and quartz fibre; Preferably, described wave transparent fiber is polyparaphenylene Ben Bing bis-oxazole (PBO) fibrillation dissolving pulp.
Preferably, described suction ripple paper also comprises granular or erose wave absorbing agent, as metal dust, carbon black, ceramic powders, ferrite powder, tiny balloon etc.
On the other hand, the invention provides a kind of method preparing above-mentioned suction ripple paper, the method comprises the steps:
(1) the fiber-like wave absorbing agent of 0.1-95wt% is mixed obtained slurry mutually with the wave transparent fiber of 5-99.9wt%;
(2) described approach flow is shaped;
(3) squeezing, drying;
(4) press polish, to obtain final product.
Preferably, prepare in the method for inhaling ripple paper above-mentioned, in step (1), described fiber-like wave absorbing agent can be selected from magnetic fibre, conductive fiber, dielectric fibers and the doping type fiber with electromagnetic wave loss function, as one or more in polycrystalline iron fiber, nickel fiber, carbon fiber, copper fiber, silicon carbide fibre, SiC/Ti doping fiber.More preferably, described fiber-like wave absorbing agent is polycrystalline iron fiber, and it has higher magnetic conductivity, and has the advantages such as temperature stability is good, strong to electro-magnetic wave absorption, bandwidth.
Preferably, prepare in the method for inhaling ripple paper above-mentioned, in step (1), described wave transparent fiber can be selected from the good inorfil of wave, high-performance synthetic fiber and pulp thereof, as one or more in p-aramid fiber fibrillation dissolving pulp, p-aramid fiber precipitating pulp, meta-aramid precipitating pulp, polyparaphenylene's benzene also two oxazoles (PBO) fibrillation dissolving pulp, quartz fibre.
More preferably, described wave transparent fiber is polyparaphenylene Ben Bing bis-oxazole (PBO) fibrillation dissolving pulp, and it has excellent high temperature resistant, resistance to chemical attack, fire resistance and mechanical property.
Preferably, prepare in the method for inhaling ripple paper above-mentioned, in step (1), the concentration of described slurry is 0.01-0.1% (w/v), preferred 0.02-0.05% (w/v).Be unfavorable for the dispersion of fiber when concentration is more than 0.1%, easily form slurry group; When concentration lower than 0.01% time, most counting machine be not enough to realize dewater timely; In addition in process of production, change slurry concentration often needs to adjust slurry network speed ratio simultaneously, excessive concentration or too low time need significantly to adjust slurry network speed ratio, and will the shaping evenness of page be unfavorable for when starching network speed than when departing from its optimum value scope.
Preferably, prepare in the method for inhaling ripple paper above-mentioned, in step (2), make described slurry by oblique net, cylinder or long mesh paper making machine Top wire former, or manually handshcet former is shaped; Preferably make described slurry by oblique net paper machine Top wire former.
Preferably, prepare in the method for inhaling ripple paper above-mentioned, in step (3), baking temperature is 90-120 DEG C, is preferably 105 DEG C.
Preferably, prepare in the method for inhaling ripple paper above-mentioned, in step (4), roll-type calender is adopted to carry out press polish under 50 ~ 300kg/cm line pressure condition, or adopt flat-plate compressed ray machine to carry out press polish under 10 ~ 60MPa pressure condition, thus raising sheet smoothness, adjustment sheet thickness is beneficial to the processing of follow-up sandwich.
On the other hand, the invention provides a kind of suction ripple sandwich, this suction ripple sandwich is prepared from by above-mentioned suction ripple paper; Preferably, described suction ripple sandwich is chevron-shaped sandwich, rhombus sandwich, regular hexagon cellular sandwich or other special-shaped cellular sandwich.
Another aspect, the invention provides a kind of method preparing above-mentioned suction ripple sandwich, the method comprises the steps:
(1) by the suction ripple paper gluing of aforementioned for the present invention preparation, lamination, compacting, cutting, make sandwich and fold block;
(2) sandwich prepared by step (1) is folded block to stretch, shape, make sandwich block;
(3) the sandwich block impregnating resin prepared by step (2), solidification, wherein said resin is thermosetting or thermoplastic polyester, as phenolic resins, epoxy resin, acrylic resin, polyimide resin etc.;
(4) the sandwich block after step (3) dipping, solidification is cut into slices, ripple sandwich must be inhaled.
Again on the one hand, the invention provides a kind of absorbing material, the suction ripple sandwich that this absorbing material is prepared by least one aforesaid suction ripple sandwich or preceding method and the absorbing material constructed dip resin that at least one wave permeation layer forms, solidification are prepared from.
Preferably, in described absorbing material structure, described suction ripple sandwich and described wave permeation layer are alternately arranged.
Preferably, in described absorbing material structure, the wave absorbing agent content of each suction ripple sandwich is identical or different; Preferably, each wave absorbing agent content difference of inhaling ripple sandwich, and described suction ripple sandwich arranges according to wave absorbing agent content order from low to high or from high to low, the suction ripple sandwich that during use, wave absorbing agent content is minimum is placed near electromagnetic wave incident side.Preferably, described absorbing material structure outermost layer has at least one deck to be wave permeation layer, and during use, this wave permeation layer is near electromagnetic wave incident side; More preferably, when the wave absorbing agent content of each suction ripple sandwich is different, and when described suction ripple sandwich arranges according to wave absorbing agent content order from low to high or from high to low, at least there is a wave permeation layer in the outside of the minimum suction ripple sandwich of wave absorbing agent content.
Preferably, described wave permeation layer is prepared from by electromagnetic wave transparent material; Preferably, described electromagnetic wave transparent material is selected from wave transparent paper base material, wave transparent fabric, wave transparent fibre reinforced resin material etc., as one or more in aramid paper, polyparaphenylene Ben Bing bis-oxazole (PBO) paper, glass fabric, quartz fiber cloth and glass fiber reinforced epoxy resin composite plate.
Preferably, described resin is thermosetting or thermoplastic polyester, as phenolic resins, epoxy resin, acrylic resin, polyimide resin etc.
In a specific embodiment, this absorbing material is formed by absorbing material constructed dip resin, solidification;
Described absorbing material structure comprises:
Suction ripple sandwich prepared by-aforementioned suction ripple sandwich or preceding method, this suction ripple sandwich arranges according to wave absorbing agent content order from low to high or from high to low;
-the wave permeation layer that is alternately arranged with described suction ripple sandwich, this wave permeation layer is prepared from by electromagnetic wave transparent material, described electromagnetic wave transparent material is selected from wave transparent paper base material, wave transparent fabric, wave transparent fibre reinforced resin material etc., as one or more in aramid paper, polyparaphenylene Ben Bing bis-oxazole (PBO) paper, glass fabric, quartz fiber cloth and glass fiber reinforced epoxy resin composite plate;
Wherein, described absorbing material structure outermost layer has at least one deck to be wave permeation layer, and preferably, this wave permeation layer is arranged on the outside of the minimum suction ripple sandwich of wave absorbing agent content in described absorbing material structure;
Described resin is thermosetting or thermoplastic polyester, as phenolic resins, epoxy resin, acrylic resin, polyimide resin etc.
Below prepared by detailed description the present invention the method for absorbing material.
The present invention is by by fiber-like wave absorbing agent and wave transparent fiber (namely, there is the fiber of wave penetrate capability) mixing after obtain the paper with absorbing property by paper technology, namely ripple paper is inhaled, suction ripple sandwich is made as lattice wall material again by above-mentioned suction ripple paper, then the suction ripple sandwich wave permeation layer obtained made of paper for the suction ripple different by fiber-like wave absorbing agent content is separated, finally total is carried out impregnation, solidification, namely obtain absorbing material.
Concrete preparation flow comprises the following steps:
(1) ripple paper is inhaled in preparation
I () disperses the fiber-like wave absorbing agent of 0.1 ~ 95wt% and the wave transparent fiber of 5 ~ 99.9wt% in water, obtain slurry A;
(ii) Top wire former;
(iii) squeezing, drying;
(iv) press polish, obtains inhaling ripple paper A ';
(2) ripple sandwich is inhaled in preparation
I () is by suction ripple paper A1 ' different for fiber-like wave absorbing agent content, A2 ', A3 ' ... make respectively and inhale ripple sandwich A1 ", A2 ", A3 " ...;
(3) absorbing material is prepared
I () will inhale ripple sandwich A1 ", A2 ", A3 " ... arrange according to wave absorbing agent content order from low to high; centre wave permeation layer B ' (being prepared from by electromagnetic wave transparent material) separates, and the outside of the minimum suction ripple sandwich of wave absorbing agent content also covers wave permeation layer (being prepared from by electromagnetic wave transparent material);
(ii) impregnating resin;
(iii) curing molding.
Inhale in ripple paper in above-mentioned preparation, described fiber-like wave absorbing agent can be selected from magnetic fibre, conductive fiber, dielectric fibers and the doping type fiber with electromagnetic wave loss function, as one or more in polycrystalline iron fiber, nickel fiber, carbon fiber, copper fiber, silicon carbide fibre, SiC/Ti doping fiber; Described wave transparent fiber can be inorfil, high-performance synthetic fiber and the pulp thereof that wave is good, as one or more in p-aramid fiber fibrillation dissolving pulp, p-aramid fiber precipitating pulp, meta-aramid fibrillation dissolving pulp, PBO fibrillation dissolving pulp, quartz fibre.Described electromagnetic wave transparent material is selected from wave transparent paper base material, wave transparent fabric, wave transparent fibre reinforced resin material etc., as one or more in aramid paper, polyparaphenylene Ben Bing bis-oxazole (PBO) paper, glass fabric, quartz fiber cloth and glass fiber reinforced epoxy resin composite plate.
Inhale in ripple paper in above-mentioned preparation, slurry is by oblique net, cylinder or long mesh paper making machine Top wire former; Or manually handshcet former is shaped, preferred slurry passes through titled net formation.
Inhale in ripple paper in above-mentioned preparation, calendaring technology specifically can adopt roll-type calender under the condition of 50 ~ 300kg/cm line pressure or the press polish under 10 ~ 60MPa pressure condition of flat-plate compressed ray machine realizes.
Wherein, ripple paper A ' preparation flow is inhaled as shown in Figure 1; Inhale ripple sandwich A " preparation flow is as shown in Figure 2.
Prepare in the method for inhaling ripple sandwich above-mentioned, described sandwich can be in chevron-shaped sandwich, rhombus sandwich, regular hexagon cellular sandwich and other special-shaped cellular sandwich one or more.
Prepare in absorbing material above-mentioned, ripple paper A1 ', A2 ', A3 ' is inhaled according to different wave absorbing agent content is obtained respectively ... after, inhale ripple sandwich A1 according to flow process shown in Fig. 2 is obtained ", A2 ", A3 " ...; the content wherein inhaling wave absorbing agent in ripple paper is A1 ' <A2 ' <A3 ' ...; for the suction ripple sandwich of three kinds of different wave absorbing agent content, obtained absorbing material structure as shown in Figure 3.
Prepare in absorbing material above-mentioned, described resin can be thermosetting or thermoplastic polyester, as phenolic resins, epoxy resin, acrylic resin, polyimide resin etc.
The mechanism of action of absorbing material of the present invention is:
For absorption-type absorbing material, want to reach and effectively absorb incident radar wave thus the object that target-echo intensity is significantly decayed need solve two large problems: one for incident wave energy enters material internal to greatest extent and not by surface reflection, namely meet impedance matching condition; Two are promptly fallen by material attenuation by absorption for the electromagnetism wave energy entering material internal, namely meet damp condition.Fiber-like wave absorbing agent not only has excellent electromagnetic attenuation effect, and has good mechanical property.Utilize paper technology fiber-like wave absorbing agent can be evenly dispersed in matrix material and obtain inhaling ripple paper, fiber-like wave absorbing agent contributes mechanical property and absorbing property in sandwich wall simultaneously.It does not need additionally to add wave absorbing agent to compare tradition suction ripple sandwich material, therefore greatly reduces the gross mass of inhaling ripple sandwich material.When the present invention prepares suction ripple sandwich, can be free of wave absorbing agent in resin matrix, therefore significantly improve the uniformity of resin-dipping, thus ensure that the mechanical property of final sandwich material and the uniformity of electromagnetic performance.This legal system controls for the gradient that can realize electromagnetic parameter during absorbing material by changing the modes such as wave absorbing agent content easily, is conducive to the optimization of impedance matching property, thus reaches the wave-absorbing effect of wideband.In addition in the absorbing material that this legal system is standby, wave absorbing agent and matrix material are interweaved, and are not easy to occur absorbent peeling phenomenon, thus ensure the stability of its absorbing property.Meanwhile, continue the advantage of sandwiched absorbing material, namely had good structural-load-carrying capacity concurrently, density is little, and Multiple Scattering absorption can have been carried out to incident electromagnetic wave thus radar wave energy of decaying to greatest extent.
Accompanying drawing explanation
Fig. 1 is the preparation flow of suction ripple paper A ' of the present invention;
Fig. 2 is suction ripple sandwich A of the present invention " preparation flow;
Fig. 3 is absorbing material structure of the present invention;
Fig. 4 is the preparation flow of wave transparent paper C ' in comparative example;
Fig. 5 is the method obtaining the resin containing wave absorbing agent in comparative example;
Fig. 6 is the suction ripple sandwich E in comparative example " preparation flow;
Fig. 7 is absorbing material structure obtained in comparative example.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.These embodiments are intended to help the content of elaboration invention instead of limit the scope of the invention.
In following examples, compressive strength and Modulus Test Method are see standard GB1453-2005 sandwich or fuse flat crush resistance test method, shear strength and Modulus Test Method are see standard GB1455-2005 Test method for shear properties of sandwich constructions or cores, and absorbing property method of testing is see standard GJB2038-1994 radar absorbing reflectivity test method (arc method).
embodiment 1
Carbon fiber 5wt% and p-aramid fiber fibrillation dissolving pulp 95wt% is mixed obtained slurry A1, carbon fiber 10wt% and p-aramid fiber fibrillation dissolving pulp 90wt% is mixed obtained slurry A2, carbon fiber 15wt% and p-aramid fiber fibrillation dissolving pulp 85wt% is mixed obtained slurry A3, slurry A1, A2, A3 difference drainage is shaped to obtain and inhales ripple paper A1 ', A2 ', A3 '.Described fiber-like wave absorbing agent is carbon fiber (domestic), diameter 10 μm, length 8mm, and described wave transparent fiber is p-aramid fiber fibrillation dissolving pulp.
Preparation flow as shown in Figure 1, with fluffer, above-mentioned carbon fiber is dispersed in water, with pulper, above-mentioned p-aramid fiber fibrillation dissolving pulp is dispersed in water, obtain homodisperse two kinds of suspension respectively, again by two kinds of suspension mixing, after stirring, obtain the slurry of concentration 0.03%.By this kind of method according to aforementioned proportion obtained slurry A1, A2, A3 respectively.Make slurry A1, A2, A3 difference Top wire former in slope screen former, dehydration, dries at 105 DEG C.Press down Seterolithography with roll-type calender in the line pressure press polish of 200kg/cm, obtain inhaling ripple paper A1 ', A2 ', A3 ', be quantitatively 50g/m
2.
According to the preparation flow shown in Fig. 2 with inhaling ripple paper A1 ', A2 ', A3 ' impregnated phenolic resin is obtained inhales ripple sandwich A1 ", A2 ", A3 ", spread is 20%, and the obtained hole lattice length of side is 2.75mm, density is 35.0kg/m
3, be highly the regular hexagon honeycomb core of 10mm.Be that (preparation method of this wave permeation layer is as follows: a, in water, disperse para-aramid fiber to obtain slurry as wave permeation layer B ' for the p-aramid paper of 0.5mm with thickness; B, approach flow to be shaped; C, squeezing, drying; D, press polish; E, stacked; F, bonding).Ripple sandwich A1 will be inhaled ", A2 ", A3 " arrange according to order shown in Fig. 3 with wave permeation layer B ', and impregnated phenolic resin obtains described suction ripple sandwich material.Obtain inhaling ripple sandwich material compressive strength be 2.8MPa, modulus of compressibility is 1.96MPa, L be 2.6MPa, L be 118.3MPa, W to modulus of shearing to shear strength is 52.1MPa to shear strength 1.1MPa, L to modulus of shearing.It all meets reflectivity and is less than-10dB in the frequency range of 2-18GHz, wherein in the frequency range of 5.3-16.8GHz, meets reflectivity and is less than-20dB, occurs reflectivity minimum-42.6dB (under the frequency range of 2-18GHz) at 10.8GHz place.
comparative example 1
Obtain slurry C with wave transparent fiber, drainage is shaped and obtains wave transparent paper C ', and is made by wave transparent paper and regular hexagon cellular sandwich A in embodiment 1 " there is the same holes lattice length of side and regular hexagon cellular sandwich C highly ".Described wave transparent fiber is p-aramid fiber fibrillation dissolving pulp.
Preparation flow as shown in Figure 4, to be dispersed in water above-mentioned p-aramid fiber fibrillation dissolving pulp with pulper and to obtain homodisperse suspension, obtain the slurry of concentration 0.03% after stirring.Slurry C is obtained by this kind of method.Make slurry C difference Top wire former in slope screen former, dehydration, dries at 105 DEG C.With roll-type calender 150 DEG C, the line pressure rolling condition of 200kg/cm presses down Seterolithography, obtain wave transparent paper C ', it is quantitatively 50g/m
2.
Shown in Fig. 5, by carbon fiber and phenolic resins in mass ratio 1:5 mix the phenolic resins D1 obtaining carbon fiber-containing, by carbon fiber and phenolic resins in mass ratio 2:5 mix the phenolic resins D2 obtaining carbon fiber-containing, by carbon fiber and phenolic resins in mass ratio 3:5 mix the phenolic resins D3 obtaining carbon fiber-containing.
The phenolic resins D1 obtained suction ripple sandwich E1 of carbon fiber-containing is flooded according to the preparation flow wave transparent paper C ' shown in Fig. 6 ", spread (carbon fiber-containing) is 23.1%, and its hole lattice length of side is 2.75mm, and density is 36.4kg/m
3, be highly 10mm.The phenolic resins D2 obtained suction ripple sandwich E2 of carbon fiber-containing is flooded with wave transparent paper C ' ", spread (carbon fiber-containing) is 25.9%, and its hole lattice length of side is 2.75mm, and density is 37.8kg/m
3, be highly 10mm.The phenolic resins D3 obtained suction ripple sandwich E3 of carbon fiber-containing is flooded with wave transparent paper C ' ", spread (carbon fiber-containing) is 28.6%, and its hole lattice length of side is 2.75mm, and density is 39.2kg/m
3, be highly 10mm.Be that the p-aramid paper of 0.5mm is as wave permeation layer with thickness.Ripple honeycomb core E1 will be inhaled ", E2 ", E3 " arrange according to order shown in Fig. 7 with wave permeation layer B ', and impregnated phenolic resin obtains described suction ripple sandwich material.Obtain inhaling ripple sandwich material compressive strength be 2.1MPa, modulus of compressibility is 1.46MPa, L be 2.2MPa, L be 97.4MPa, W to modulus of shearing to shear strength is 38.2MPa to shear strength 0.8MPa, L to modulus of shearing.It meets reflectivity and is less than-10dB in the frequency range of 7.8-12.1GHz, does not occur that reflectivity is less than the situation of-20dB in the frequency range of 2-18GHz, occurs reflectivity minimum-17.3dB (under the frequency range of 2-18GHz) at 10.2GHz place.As can be seen here, when carbon fiber is identical with resin demand, the absorbing material prepared according to method of the present invention not only has less density and higher mechanical property, and has more excellent absorbing property.
embodiment 2
Silicon carbide fibre 40wt% and p-aramid fiber precipitating pulp 60wt% is mixed obtained slurry A1, silicon carbide fibre 50wt% and p-aramid fiber precipitating pulp 50wt% is mixed obtained slurry A2, silicon carbide fibre 60wt% and p-aramid fiber precipitating pulp 40wt% is mixed obtained slurry A3, slurry A1, A2, A3 difference drainage is shaped to obtain and inhales ripple paper A1 ', A2 ', A3 '.Described fiber-like wave absorbing agent is silicon carbide fibre (domestic), diameter 12 μm, length 6mm, and described wave transparent fiber is p-aramid fiber precipitating pulp.
Preparation flow as shown in Figure 1, with fluffer, above-mentioned silicon carbide fibre is dispersed in water, with pulper, above-mentioned p-aramid fiber precipitating pulp is dispersed in water, obtain homodisperse two kinds of suspension respectively, again by two kinds of suspension mixing, after stirring, obtain the slurry of concentration 0.05%.By this kind of method according to aforementioned proportion obtained slurry A1, A2, A3 respectively.Make slurry A1, A2, A3 difference Top wire former in slope screen former, dehydration, dries at 110 DEG C.Press down Seterolithography with roll-type calender at the line pressure rolling condition of 220kg/cm, obtain inhaling ripple paper A1 ', A2 ', A3 ', be quantitatively 50g/m
2.
Inhale ripple paper A1 ' according to the preparation flow shown in Fig. 2, A2 ', A3 ' flood that acrylic resin is obtained inhales ripple sandwich A1 ", A2 ", A3 ", spread is 25%, and obtained drift angle 60 °, density are 37.4kg/m
3, be highly the chevron-shaped sandwich of 10mm.Be that (preparation method of this wave permeation layer is as follows: a, to be moved back by quartz fibre precursor and separate and twist with the fingers as wave permeation layer B ' for the quartz textile of 0.7mm with thickness; B, warping, gait, quilling; C, to weave; D, to cut; E, at surperficial acrylic resins of painting; F, solidification).Ripple sandwich A1 will be inhaled ", A2 ", A3 " arrange according to order shown in Fig. 3 with wave permeation layer B ', and flood acrylic resin and obtain described suction ripple sandwich material.Obtain inhaling ripple sandwich material honeycomb compressive strength be 3.0MPa, modulus of compressibility is 2.03MPa, L be 2.8MPa, L be 131.0MPa, W to modulus of shearing to shear strength is 57.2MPa to shear strength 1.3MPa, L to modulus of shearing.It all meets reflectivity and is less than-10dB in the frequency range of 2-18GHz, wherein in the frequency range of 3.8-14.5GHz, meets reflectivity and is less than-20dB, occurs reflectivity minimum-33.7dB (under the frequency range of 2-18GHz) at 8.7GHz place.
embodiment 3
By polycrystalline iron fiber 35wt%, carbon black 5wt% and PBO fibrillation dissolving pulp 60wt% mixes obtained slurry A1, by polycrystalline iron fiber 37.5, carbon black 6wt%wt% and PBO fibrillation dissolving pulp 56.5wt% mixes obtained slurry A2, by polycrystalline iron fiber 40wt%, carbon black 7wt% and PBO fibrillation dissolving pulp 53wt% mixes obtained slurry A3, is shaped to obtain by slurry A1, A2, A3 difference drainage and inhales ripple paper A1 ', A2 ', A3 '.Described fiber-like wave absorbing agent is polycrystalline iron fiber, diameter 5 μm, length 1mm, and described granular wave absorbing agent is carbon black, particle diameter 5 ~ 10 μm, and described wave transparent fiber is PBO fibrillation dissolving pulp.
Preparation flow as shown in Figure 1, with fluffer by above-mentioned polycrystalline iron fiber and carbon black dispersion in water, with pulper, above-mentioned PBO fibrillation dissolving pulp is dispersed in water, obtains homodisperse three kinds of suspension respectively, again by three kinds of suspension mixing, after stirring, obtain the slurry of concentration 0.08%.By this kind of method according to aforementioned proportion obtained slurry A1, A2, A3 respectively.Make slurry A1, A2, A3 difference Top wire former in slope screen former, dehydration, dries at 110 DEG C.Press down Seterolithography with flat-plate compressed ray machine in the calendering pressure condition of 20MPa, obtain inhaling ripple paper A1 ', A2 ', A3 ', be quantitatively 50g/m
2.
According to the preparation flow shown in Fig. 2 with inhaling ripple paper A1 ', A2 ', A3 ' epoxy resin-impregnated is obtained inhales ripple sandwich A1 ", A2 ", A3 ", spread is 18%, and the obtained length of side is 2mm, density is 31.3kg/m
3, be highly the rhombus sandwich of 10mm.Be that (preparation method of this wave permeation layer is as follows: a, add curing agent and solvent in the epoxy, stirs and obtains blend glue stuff as wave permeation layer B ' for the chopped glass fiber reinforced epoxy composite of 0.3mm with thickness; B, chopped glass fiber is added in blend glue stuff, stir; C, mixed liquor is poured in mould; D, reduce pressure degassed to bubble-free; E, solidification).Ripple honeycomb core A1 will be inhaled ", A2 ", A3 " arrange according to order shown in Fig. 3 with wave permeation layer B ', and epoxy resin-impregnated obtains described suction ripple sandwich material.Obtain inhaling ripple sandwich material compressive strength be 3.3MPa, modulus of compressibility is 2.17MPa, L be 2.7MPa, L be 129.4MPa, W to modulus of shearing to shear strength is 55.8MPa to shear strength 1.2MPa, L to modulus of shearing.It all meets reflectivity and is less than-10dB in the frequency range of 2-18GHz, wherein in the frequency range of 2.5-15.9GHz, meets reflectivity and is less than-20dB, occurs reflectivity minimum-44.3dB (under the frequency range of 2-18GHz) at 9.3GHz place.
embodiment 4
By nickel fiber 0.5wt%, ferrite 2wt% and quartz fibre 93.5wt% mixes obtained slurry A1, by nickel fiber 5wt%, ferrite 4wt% and quartz fibre 91wt% mixes obtained slurry A2, by nickel fiber 42wt%, ferrite 8wt% and quartz fibre 50wt% mixes obtained slurry A3, is shaped to obtain by slurry A1, A2, A3 difference drainage and inhales ripple paper A1 ', A2 ', A3 '.Described fiber-like wave absorbing agent is nickel fiber, diameter 8 μm, length 4mm, and described irregular shape wave absorbing agent is six square ferrites, and described wave transparent fiber is quartz fibre.
Preparation flow as shown in Figure 1, is dispersed in water above-mentioned nickel fiber, ferrite and quartz fibre respectively with fluffer, obtains homodisperse three kinds of suspension respectively, then by three kinds of suspension mixing, obtains the slurry of concentration 0.1% after stirring.By this kind of method according to aforementioned proportion obtained slurry A1, A2, A3 respectively.Make slurry A1, A2, A3 difference Top wire former in slope screen former, dehydration, dries at 108 DEG C.Press down Seterolithography with flat-plate compressed ray machine at the rolling condition of 30MPa, obtain inhaling ripple paper A1 ', A2 ', A3 ', be quantitatively 50g/m
2.
Inhale ripple paper A1 ' according to the preparation flow shown in Fig. 2, A2 ', A3 ' flood that polyimide resin is obtained inhales ripple sandwich A1 ", A2 ", A3 ", spread is 30%, and the obtained hole lattice length of side is 1.83mm, density is 60.1kg/m
3, be highly the regular hexagon honeycomb core of 10mm.Be that (preparation method of this wave permeation layer is as follows: a, in water, disperse meta-aramid fibers to obtain slurry as wave permeation layer B ' for the meta-position aramid fiber paper of 0.3mm with thickness; B, approach flow to be shaped; C, squeezing, drying; D, press polish; E, stacked; F, bonding).Ripple sandwich A1 will be inhaled ", A2 ", A3 " arrange according to order shown in Fig. 4 with wave permeation layer B ', and flood polyimide resin and obtain described suction ripple sandwich material.Obtain inhaling ripple sandwich material compressive strength be 2.5MPa, modulus of compressibility is 1.74MPa, L be 2.1MPa, L be 101.2MPa, W to modulus of shearing to shear strength is 41.7MPa to shear strength 0.9MPa, L to modulus of shearing.It all meets reflectivity and is less than-10dB in the frequency range of 2-18GHz, wherein in the frequency range of 3.2-15.7GHz, meets reflectivity and is less than-20dB, occurs reflectivity minimum-39.4dB (under the frequency range of 2-18GHz) at 7.1GH place.
Claims (20)
1. inhale a ripple paper, this suction ripple paper bag is containing the fiber-like wave absorbing agent of 0.1-95wt% and the wave transparent fiber of 5-99.9wt%.
2. preparation method according to claim 1, it is characterized in that, described fiber-like wave absorbing agent is selected from magnetic fibre, conductive fiber, dielectric fibers and the doping type fiber with electromagnetic wave loss function, as one or more in polycrystalline iron fiber, nickel fiber, carbon fiber, copper fiber, silicon carbide fibre and SiC/Ti doping fiber; Preferably, described fiber-like wave absorbing agent is polycrystalline iron fiber.
3. preparation method according to claim 1 and 2, it is characterized in that, described wave transparent fiber is selected from the good inorfil of wave, high-performance synthetic fiber and pulp thereof, as one or more in p-aramid fiber fibrillation dissolving pulp, p-aramid fiber precipitating pulp, meta-aramid fibrillation dissolving pulp, polyparaphenylene Ben Bing bis-oxazole (PBO) fibrillation dissolving pulp and quartz fibre; Preferably, described wave transparent fiber is polyparaphenylene Ben Bing bis-oxazole (PBO) fibrillation dissolving pulp.
4. preparation method according to any one of claim 1 to 3, is characterized in that, described suction ripple paper also comprises granular or erose wave absorbing agent, as metal dust, carbon black, ceramic powders, ferrite powder, tiny balloon etc.
5. a preparation method for the suction ripple paper according to any one of Claims 1-4, the method comprises the steps:
(1) the fiber-like wave absorbing agent of 0.1-95wt% is mixed obtained slurry mutually with the wave transparent fiber of 5-99.9wt%;
(2) described approach flow is shaped;
(3) squeezing, drying;
(4) press polish, to obtain final product.
6. preparation method according to claim 5, it is characterized in that, in step (1), described fiber-like wave absorbing agent is selected from magnetic fibre, conductive fiber, dielectric fibers and the doping type fiber with electromagnetic wave loss function, as one or more in polycrystalline iron fiber, nickel fiber, carbon fiber, copper fiber, silicon carbide fibre, SiC/Ti doping fiber; Preferably, described fiber-like wave absorbing agent is polycrystalline iron fiber.
7. the preparation method according to claim 5 or 6, it is characterized in that, in step (1), described wave transparent fiber is selected from the good inorfil of wave, high-performance synthetic fiber and pulp thereof, as one or more in p-aramid fiber fibrillation dissolving pulp, p-aramid fiber precipitating pulp, meta-aramid fibrillation dissolving pulp, polyparaphenylene Ben Bing bis-oxazole (PBO) fibrillation dissolving pulp and quartz fibre; Preferably, described wave transparent fiber is polyparaphenylene Ben Bing bis-oxazole (PBO) fibrillation dissolving pulp.
8. the preparation method according to any one of claim 5 to 7, is characterized in that, in step (1), the concentration of described slurry is 0.01-0.1% (w/v), is preferably 0.02-0.05% (w/v).
9. the preparation method according to any one of claim 5 to 8, is characterized in that, in step (2), makes described slurry by oblique net, cylinder or long mesh paper making machine Top wire former, or manually handshcet former is shaped; Preferably make described slurry by oblique net paper machine Top wire former.
10. the preparation method according to any one of claim 5 to 9, is characterized in that, in step (3), baking temperature is 90-120 DEG C, is preferably 105 DEG C.
11. preparation methods according to any one of claim 5 to 9, it is characterized in that, in step (4), adopt roll-type calender to carry out press polish under the line pressure condition of 50 ~ 300kg/cm, or adopt flat-plate compressed ray machine to carry out press polish under the pressure condition of 10 ~ 60MPa.
Inhale ripple sandwich for 12. 1 kinds, the suction ripple paper of this suction ripple sandwich according to any one of Claims 1-4 is prepared from; Preferably, described suction ripple sandwich is chevron-shaped sandwich, rhombus sandwich, regular hexagon cellular sandwich or other special-shaped cellular sandwich.
13. 1 kinds of methods preparing suction ripple sandwich according to claim 12, the method comprises the steps:
(1) by the suction ripple paper gluing according to any one of Claims 1-4, lamination, compacting, cutting, make sandwich and fold block;
(2) sandwich prepared by step (1) is folded block to stretch, shape, make sandwich block;
(3) the sandwich block impregnating resin prepared by step (2), solidification, wherein said resin is thermosetting or thermoplastic polyester, as phenolic resins, epoxy resin, acrylic resin, polyimide resin etc.;
(4) the sandwich block after step (3) dipping, solidification is cut into slices, ripple sandwich must be inhaled.
14. 1 kinds of absorbing materials, the suction ripple sandwich that this absorbing material is prepared by least one suction ripple sandwich according to claim 12 or method according to claim 13 and the absorbing material constructed dip resin that at least one wave permeation layer forms, solidification are prepared from.
15. absorbing materials according to claim 14, is characterized in that, in described absorbing material structure, described suction ripple sandwich and described wave permeation layer are alternately arranged.
16. absorbing materials according to claims 14 or 15, is characterized in that, in described absorbing material structure, each wave absorbing agent content inhaling ripple sandwich is identical or different; Preferably, each wave absorbing agent content difference of inhaling ripple sandwich, and described suction ripple sandwich arranges according to wave absorbing agent content order from low to high or from high to low.
17., according to claim 14 to the absorbing material according to any one of 16, is characterized in that, described absorbing material structure outermost layer has at least one deck to be wave permeation layer; Preferably, when the wave absorbing agent content of each suction ripple sandwich is different, and when described suction ripple sandwich arranges according to wave absorbing agent content order from low to high or from high to low, at least there is a wave permeation layer in the outside of the minimum suction ripple sandwich of wave absorbing agent content.
18., according to claim 14 to the absorbing material according to any one of 17, is characterized in that, described wave permeation layer is prepared from by electromagnetic wave transparent material; Preferably, described electromagnetic wave transparent material is selected from wave transparent paper base material, wave transparent fabric, wave transparent fibre reinforced resin material etc., as one or more in aramid paper, polyparaphenylene Ben Bing bis-oxazole (PBO) paper, glass fabric, quartz fiber cloth and glass fiber reinforced epoxy resin composite plate.
19., according to claim 14 to the absorbing material according to any one of 18, is characterized in that, described resin is thermosetting or thermoplastic polyester, as phenolic resins, epoxy resin, acrylic resin, polyimide resin etc.
20., according to claim 14 to the absorbing material according to any one of 19, is characterized in that, this absorbing material is formed by absorbing material constructed dip resin, solidification;
Described absorbing material structure comprises:
Suction ripple sandwich prepared by-suction ripple sandwich according to claim 12 or method according to claim 13, this suction ripple sandwich arranges according to wave absorbing agent content order from low to high or from high to low;
-the wave permeation layer that is alternately arranged with described suction ripple sandwich, this wave permeation layer is prepared from by electromagnetic wave transparent material, described electromagnetic wave transparent material is selected from wave transparent paper base material, wave transparent fabric, wave transparent fibre reinforced resin material etc., as one or more in aramid paper, polyparaphenylene Ben Bing bis-oxazole (PBO) paper, glass fabric, quartz fiber cloth and glass fiber reinforced epoxy resin composite plate;
Wherein, described absorbing material structure outermost layer has at least one deck to be wave permeation layer, and preferably, this wave permeation layer is arranged on the outside of the minimum suction ripple sandwich of wave absorbing agent content in described absorbing material structure;
Described resin is thermosetting or thermoplastic polyester, as phenolic resins, epoxy resin, acrylic resin, polyimide resin etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459537.4A CN104404814B (en) | 2014-09-10 | 2014-09-10 | Inhale ripple paper and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459537.4A CN104404814B (en) | 2014-09-10 | 2014-09-10 | Inhale ripple paper and its preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104404814A true CN104404814A (en) | 2015-03-11 |
| CN104404814B CN104404814B (en) | 2018-01-19 |
Family
ID=52642476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410459537.4A Active CN104404814B (en) | 2014-09-10 | 2014-09-10 | Inhale ripple paper and its preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104404814B (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831577A (en) * | 2015-04-14 | 2015-08-12 | 深圳昊天龙邦复合材料有限公司 | Wave-absorption and long-service life composite paper and preparation method thereof |
| CN105401484A (en) * | 2015-10-28 | 2016-03-16 | 中国建筑材料科学研究总院 | Absorptive-type electromagnetic shielding paper and preparation method thereof |
| CN105504586A (en) * | 2015-12-30 | 2016-04-20 | 日丰科技有限公司 | Sound-insulation shielding composite material and preparation method thereof |
| CN106202656A (en) * | 2016-06-30 | 2016-12-07 | 西安理工大学 | A kind of method for designing of honeycomb absorbent structure aperture space |
| CN108215339A (en) * | 2017-12-30 | 2018-06-29 | 嘉兴雅港复合材料有限公司 | A kind of high intensity aramid fiber paper honeycomb core and its manufacturing method |
| CN109180070A (en) * | 2018-09-30 | 2019-01-11 | 西北工业大学 | A kind of flexibility hydridization carbon nano wave-absorption paper and preparation method thereof |
| CN109664577A (en) * | 2019-01-09 | 2019-04-23 | 中国建筑材料科学研究总院有限公司 | Electromagnetic shielding composite material and preparation method thereof |
| CN110293713A (en) * | 2019-06-10 | 2019-10-01 | 山西省交通科技研发有限公司 | A kind of New Radar Absorbing composite material and preparation method |
| WO2019187596A1 (en) * | 2018-03-30 | 2019-10-03 | デュポン帝人アドバンスドペーパー株式会社 | Electromagnetic wave absorbing sheet and method for producing same |
| JP2019186507A (en) * | 2018-03-30 | 2019-10-24 | デュポン帝人アドバンスドペーパー株式会社 | Electromagnetic wave absorbing sheet and manufacturing method of the same |
| CN110733185A (en) * | 2019-09-12 | 2020-01-31 | 河南泛锐复合材料研究院有限公司 | wave-absorbing sandwich foam and preparation method thereof |
| CN112048938A (en) * | 2020-08-26 | 2020-12-08 | 中国航空工业集团公司济南特种结构研究所 | Preparation method of wave-absorbing paper honeycomb |
| CN112261857A (en) * | 2020-09-09 | 2021-01-22 | 航天材料及工艺研究所 | Light honeycomb wave-absorbing material and preparation method thereof |
| CN112318950A (en) * | 2020-11-02 | 2021-02-05 | 中国舰船研究设计中心 | High-strength electromagnetic pulse protection structure material |
| CN112351665A (en) * | 2019-12-30 | 2021-02-09 | 广州方邦电子股份有限公司 | Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film |
| CN112553942A (en) * | 2020-12-02 | 2021-03-26 | 航天特种材料及工艺技术研究所 | Dielectric loss aramid paper, wave-absorbing honeycomb and preparation method |
| CN112726283A (en) * | 2020-12-25 | 2021-04-30 | 烟台民士达特种纸业股份有限公司 | Poly (p-phenylene benzobisoxazole) fiber paper base material for high-temperature-resistant honeycomb core material and preparation method thereof |
| CN113622217A (en) * | 2020-05-09 | 2021-11-09 | 华南理工大学 | Magnetic paper base material and preparation method thereof |
| CN113978064A (en) * | 2021-09-18 | 2022-01-28 | 航天特种材料及工艺技术研究所 | Hybrid structure wave-absorbing composite material and preparation method thereof |
| CN114108363A (en) * | 2021-10-08 | 2022-03-01 | 华南理工大学 | Self-supporting carbon material and preparation method and application thereof |
| CN114214866A (en) * | 2021-11-30 | 2022-03-22 | 航天特种材料及工艺技术研究所 | Magnetic loss aramid paper, wave-absorbing honeycomb and preparation method |
| CN114606794A (en) * | 2022-04-20 | 2022-06-10 | 华南理工大学 | Paper-based material with electromagnetic characteristics distributed in transverse gradient manner and manufacturing method and application thereof |
| CN114790664A (en) * | 2021-01-26 | 2022-07-26 | 中国科学院化学研究所 | High-strength polyphenylene benzobisoxazole paper base material |
| CN115304307A (en) * | 2022-08-19 | 2022-11-08 | 北京环境特性研究所 | Broadband wave-absorbing material and preparation method thereof |
| WO2023040096A1 (en) * | 2021-09-14 | 2023-03-23 | 国网江苏省电力有限公司南通供电分公司 | Supercapacitor applied to transformer substation |
| CN115891293A (en) * | 2022-12-15 | 2023-04-04 | 航天特种材料及工艺技术研究所 | Wave-absorbing honeycomb with impedance matching structure and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451989A (en) * | 2013-09-18 | 2013-12-18 | 烟台民士达特种纸业股份有限公司 | Electrothermal high-temperature-resistant carbon fiber paper and preparation method thereof |
| CN103587706A (en) * | 2013-11-14 | 2014-02-19 | 北京机电工程研究所 | Aircraft oil tank component with low radar echo scattering function and preparation method thereof |
| CN103726394A (en) * | 2013-04-22 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | High-strength carbon fiber shielding paper and preparation method thereof |
| CN103737988A (en) * | 2014-01-06 | 2014-04-23 | 苏州芳磊蜂窝复合材料有限公司 | Honeycomb core based on carbon fibre paper and preparation method for same |
-
2014
- 2014-09-10 CN CN201410459537.4A patent/CN104404814B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726394A (en) * | 2013-04-22 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | High-strength carbon fiber shielding paper and preparation method thereof |
| CN103451989A (en) * | 2013-09-18 | 2013-12-18 | 烟台民士达特种纸业股份有限公司 | Electrothermal high-temperature-resistant carbon fiber paper and preparation method thereof |
| CN103587706A (en) * | 2013-11-14 | 2014-02-19 | 北京机电工程研究所 | Aircraft oil tank component with low radar echo scattering function and preparation method thereof |
| CN103737988A (en) * | 2014-01-06 | 2014-04-23 | 苏州芳磊蜂窝复合材料有限公司 | Honeycomb core based on carbon fibre paper and preparation method for same |
Non-Patent Citations (1)
| Title |
|---|
| 刘一山等: ""胶原纤维-植物纤维复合屏蔽纸的制备及其微波屏蔽性能研究"", 《中国造纸》 * |
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831577B (en) * | 2015-04-14 | 2017-04-26 | 深圳昊天龙邦复合材料有限公司 | Wave-absorption and long-service life composite paper and preparation method thereof |
| CN104831577A (en) * | 2015-04-14 | 2015-08-12 | 深圳昊天龙邦复合材料有限公司 | Wave-absorption and long-service life composite paper and preparation method thereof |
| CN105401484A (en) * | 2015-10-28 | 2016-03-16 | 中国建筑材料科学研究总院 | Absorptive-type electromagnetic shielding paper and preparation method thereof |
| CN105504586A (en) * | 2015-12-30 | 2016-04-20 | 日丰科技有限公司 | Sound-insulation shielding composite material and preparation method thereof |
| CN106202656B (en) * | 2016-06-30 | 2019-05-28 | 西安理工大学 | A kind of design method of honeycomb absorbent structure aperture space |
| CN106202656A (en) * | 2016-06-30 | 2016-12-07 | 西安理工大学 | A kind of method for designing of honeycomb absorbent structure aperture space |
| CN108215339A (en) * | 2017-12-30 | 2018-06-29 | 嘉兴雅港复合材料有限公司 | A kind of high intensity aramid fiber paper honeycomb core and its manufacturing method |
| CN108215339B (en) * | 2017-12-30 | 2020-04-21 | 嘉兴雅港复合材料有限公司 | High-strength aramid fiber paper honeycomb core and manufacturing method thereof |
| WO2019187596A1 (en) * | 2018-03-30 | 2019-10-03 | デュポン帝人アドバンスドペーパー株式会社 | Electromagnetic wave absorbing sheet and method for producing same |
| JP2019186507A (en) * | 2018-03-30 | 2019-10-24 | デュポン帝人アドバンスドペーパー株式会社 | Electromagnetic wave absorbing sheet and manufacturing method of the same |
| CN109180070A (en) * | 2018-09-30 | 2019-01-11 | 西北工业大学 | A kind of flexibility hydridization carbon nano wave-absorption paper and preparation method thereof |
| CN109664577A (en) * | 2019-01-09 | 2019-04-23 | 中国建筑材料科学研究总院有限公司 | Electromagnetic shielding composite material and preparation method thereof |
| CN109664577B (en) * | 2019-01-09 | 2021-05-14 | 中国建筑材料科学研究总院有限公司 | Electromagnetic shielding composite material and preparation method thereof |
| CN110293713A (en) * | 2019-06-10 | 2019-10-01 | 山西省交通科技研发有限公司 | A kind of New Radar Absorbing composite material and preparation method |
| CN110733185A (en) * | 2019-09-12 | 2020-01-31 | 河南泛锐复合材料研究院有限公司 | wave-absorbing sandwich foam and preparation method thereof |
| CN110733185B (en) * | 2019-09-12 | 2022-02-08 | 巩义市泛锐熠辉复合材料有限公司 | Wave-absorbing sandwich foam and preparation method thereof |
| CN112351665A (en) * | 2019-12-30 | 2021-02-09 | 广州方邦电子股份有限公司 | Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film |
| CN113622217A (en) * | 2020-05-09 | 2021-11-09 | 华南理工大学 | Magnetic paper base material and preparation method thereof |
| CN113622217B (en) * | 2020-05-09 | 2023-01-31 | 华南理工大学 | Magnetic paper base material and preparation method thereof |
| CN112048938A (en) * | 2020-08-26 | 2020-12-08 | 中国航空工业集团公司济南特种结构研究所 | Preparation method of wave-absorbing paper honeycomb |
| CN112261857A (en) * | 2020-09-09 | 2021-01-22 | 航天材料及工艺研究所 | Light honeycomb wave-absorbing material and preparation method thereof |
| CN112318950A (en) * | 2020-11-02 | 2021-02-05 | 中国舰船研究设计中心 | High-strength electromagnetic pulse protection structure material |
| CN112553942A (en) * | 2020-12-02 | 2021-03-26 | 航天特种材料及工艺技术研究所 | Dielectric loss aramid paper, wave-absorbing honeycomb and preparation method |
| CN112726283A (en) * | 2020-12-25 | 2021-04-30 | 烟台民士达特种纸业股份有限公司 | Poly (p-phenylene benzobisoxazole) fiber paper base material for high-temperature-resistant honeycomb core material and preparation method thereof |
| CN114790664A (en) * | 2021-01-26 | 2022-07-26 | 中国科学院化学研究所 | High-strength polyphenylene benzobisoxazole paper base material |
| CN114790664B (en) * | 2021-01-26 | 2023-02-24 | 中国科学院化学研究所 | High-strength polyphenylene benzobisoxazole paper base material |
| WO2023040096A1 (en) * | 2021-09-14 | 2023-03-23 | 国网江苏省电力有限公司南通供电分公司 | Supercapacitor applied to transformer substation |
| CN113978064A (en) * | 2021-09-18 | 2022-01-28 | 航天特种材料及工艺技术研究所 | Hybrid structure wave-absorbing composite material and preparation method thereof |
| CN114108363A (en) * | 2021-10-08 | 2022-03-01 | 华南理工大学 | Self-supporting carbon material and preparation method and application thereof |
| CN114214866A (en) * | 2021-11-30 | 2022-03-22 | 航天特种材料及工艺技术研究所 | Magnetic loss aramid paper, wave-absorbing honeycomb and preparation method |
| CN114606794A (en) * | 2022-04-20 | 2022-06-10 | 华南理工大学 | Paper-based material with electromagnetic characteristics distributed in transverse gradient manner and manufacturing method and application thereof |
| CN115304307A (en) * | 2022-08-19 | 2022-11-08 | 北京环境特性研究所 | Broadband wave-absorbing material and preparation method thereof |
| CN115891293A (en) * | 2022-12-15 | 2023-04-04 | 航天特种材料及工艺技术研究所 | Wave-absorbing honeycomb with impedance matching structure and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104404814B (en) | 2018-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104404814B (en) | Inhale ripple paper and its preparation method and application | |
| CN108749229B (en) | Wave-absorbing composite material with sandwich structure and preparation method thereof | |
| CN113524820B (en) | Wave-absorbing composite material and preparation method thereof | |
| CN110290689A (en) | A kind of low frequency and wideband microwave absorbing material and preparation method thereof | |
| CN107825810A (en) | A kind of lightweight lightning Protection superficial layer and its preparation and application | |
| CN109664577B (en) | Electromagnetic shielding composite material and preparation method thereof | |
| CN106739321A (en) | A kind of structural wave-absorbing material and preparation method thereof | |
| CN104774346B (en) | A kind of light porous suction ripple film and preparation method thereof | |
| CN103103869B (en) | Method for preparing carbon fiber composite functional paper | |
| CN108493624B (en) | Dual-frequency wave absorber based on metamaterial and preparation method thereof | |
| CN102180695A (en) | Wave-absorbing ceramic made of silicon carbide composite material and preparation method thereof | |
| CN101384159A (en) | Electromagnetic compatible wood based composite material with shielding cloth covered on surface and preparation thereof | |
| CN111549567A (en) | Modified preparation method of high-thermal-conductivity mica paper | |
| CN106626619B (en) | A kind of Wave suction composite material of load circular patch Meta Materials | |
| CN108601317A (en) | A kind of preparation and application of broadband light Meta Materials absorbent structure | |
| CN107012721B (en) | A kind of preparation of ultra high efficiency carbon fiber electrically magnetic screen paper | |
| CN106498712A (en) | Electro-magnetic wave absorption grid material and preparation method thereof | |
| CN101407975A (en) | Method for preparing flexible non-weaving suction wave material and product thereof | |
| CN110257006A (en) | A kind of microwave absorbing material and preparation method thereof | |
| CN109279860B (en) | Preparation method of 3D printing electromagnetic protection light high-strength phosphate cement material | |
| Wang et al. | Strong mechanics and broadened microwave absorption of graphene-based sandwich structures and surface-patterned structures | |
| CN101518964B (en) | Polarization independent high performance adjustable compound microwave absorption material | |
| CN102523730A (en) | Structured wave-absorbing material and preparation method thereof | |
| CN111825380A (en) | Three-layer structure cement-based wave-absorbing plate doped with nano functional material and preparation method thereof | |
| CN102316711B (en) | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |