CN116512686A - Multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and preparation method thereof - Google Patents

Multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and preparation method thereof Download PDF

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Publication number
CN116512686A
CN116512686A CN202211530680.9A CN202211530680A CN116512686A CN 116512686 A CN116512686 A CN 116512686A CN 202211530680 A CN202211530680 A CN 202211530680A CN 116512686 A CN116512686 A CN 116512686A
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China
Prior art keywords
wave
absorbing
layer
interlayer
transmitting
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Pending
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CN202211530680.9A
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Chinese (zh)
Inventor
王晓文
唐青秀
赵大娟
周正亮
赵忠博
王芸铖
王蕴之
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Sinoma Science and Technology Co Ltd
Nanjing Fiberglass Research and Design Institute Co Ltd
Original Assignee
Sinoma Science and Technology Co Ltd
Nanjing Fiberglass Research and Design Institute Co Ltd
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Application filed by Sinoma Science and Technology Co Ltd, Nanjing Fiberglass Research and Design Institute Co Ltd filed Critical Sinoma Science and Technology Co Ltd
Priority to CN202211530680.9A priority Critical patent/CN116512686A/en
Publication of CN116512686A publication Critical patent/CN116512686A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/02—Layer formed of wires, e.g. mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/103—Metal fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0271—Epoxy resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0285—Condensation resins of aldehydes, e.g. with phenols, ureas, melamines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/212—Electromagnetic interference shielding

Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Laminated Bodies (AREA)

Abstract

The application discloses a multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and a preparation method thereof, wherein multi-interlayer hollow fabrics are integrally woven, and the multi-interlayer hollow fabrics are mixed with functional materials; the functional material comprises a functional material matrix which is a resin material; the functional material inside the multi-interlayer hollow fabric is mixed with a wave absorber filler to form wave absorbing foam with environment resistance and wave absorbing performance, and the wave absorber filler is tiny particles with electromagnetic loss capacity; the multi-interlayer hollow fabric comprises a wave-transmitting layer, a wave-absorbing layer and a reflecting layer from top to bottom, wherein the wave-transmitting layer is a low dielectric loss fiber; the wave-absorbing layer is a velvet layer of SiC fibers and is mixed with wave-absorbing foam; the reflective layer is made of metal wires or carbon fibers. The composite material can replace the existing interlayer function wave-absorbing material by the excellent characteristics of light weight, delamination resistance, strong shock resistance, wave absorption, heat insulation and the like, and can be widely applied to the fields of aviation, aerospace, land weaponry and the like.

Description

Multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and preparation method thereof
Technical Field
The invention belongs to the technical field of novel composite materials, and particularly relates to a multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and a preparation method thereof.
Background
The structural radar wave-absorbing material is a multifunctional composite material developed on the basis of the prior composite material, has the functions of bearing, corrosion resistance, moisture resistance and high temperature resistance while absorbing waves, has the advantages of multiple frequency bands, high efficiency, no additional mass, capability of forming various parts with complex shapes and the like, and is the main development direction of the current wave-absorbing material. The structural radar wave-absorbing structural material comprises a honeycomb sandwich structure, a foam sandwich structure, a novel radar stealth composite material and other various forms. The traditional honeycomb or foam sandwich structure is bonded by an adhesive film, the interlayer mechanical property and the interlayer impedance matching property of the traditional honeycomb or foam sandwich structure are difficult to coordinate, and the problems of layering, stripping, crushing and the like caused by weak interfaces between core materials and fiber surface layers exist. The traditional foam sandwich composite material skin is easy to fall off from the sandwich, and the honeycomb composite material has poor integrity, and when the honeycomb composite material is in a high-temperature and high-humidity environment or can not bear alternating external force, the bonding part is easy to crack. Meanwhile, the interlayer performance of the laminated plate type wave-absorbing composite material is weak and the shock resistance is poor, so that the laminated plate is in layered failure. Even causing the failure of the whole structure, it is difficult to meet the requirement of wave absorption/bearing.
The special integral layer-connected integrated structure of the hollow fabric has excellent designability, the composite material is sequentially designed into the impedance matching layer, the absorption layer and the reflecting layer functional layer, the optimization of the wave absorbing performance of the hollow fabric composite material is structurally realized, and the structure can provide the integrity and the structural stability of the reinforced structure.
Disclosure of Invention
The invention aims to solve the problems of excellent wave absorbing performance and good bearing strength of the traditional sandwich structure, and provides a novel structural design, wherein the traditional sandwich composite material is replaced by the integral laminated sandwich structure composite material. The design can ensure the requirements of the external dimension, the strength and the rigidity, the electrical property and the like of the material, reduce the weight to a greater extent, and effectively reduce the production and manufacturing difficulty and the cost.
In order to achieve the aim of the invention, the invention discloses a multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material, wherein the multi-interlayer hollow composite material comprises multi-interlayer hollow fabrics and functional materials; the multi-interlayer hollow fabric is formed by integrally knitting, is not connected by a glue film, and is mixed with functional materials; the functional material comprises a functional material matrix, wherein the functional material matrix is a resin material with good mechanical property and environmental resistance; the functional material inside the multi-interlayer hollow fabric is mixed with a wave absorber filler to form wave absorbing foam with environment resistance and wave absorbing performance, and the wave absorber filler is tiny particles with electromagnetic loss capacity; the multi-interlayer hollow fabric comprises a wave-transmitting layer, a wave-absorbing layer and a reflecting layer from top to bottom, wherein the wave-transmitting layer is a low dielectric loss fiber; the wave-absorbing layer is a velvet layer of SiC fibers and is mixed with wave-absorbing foam; the reflective layer is made of metal wires or carbon fibers.
Further, the sandwich structure of the pile warp layer of the SiC fiber comprises one or more structural combinations of ' 8 ' -type ', ' W ' -type ', ' V ' -type ', ' pi ' -type ', ' O ' -type ', ' II ' -type and ' X ' -type.
Further, the different layers of the multi-layer hollow fabric have heights of 2-20 mm and overall heights of 5-40 mm.
Further, the functional material matrix comprises phenolic resin and epoxy resin; the wave absorber filler comprises carbon nano tubes and carbon black; the wave-transmitting layer fiber comprises glass fiber and quartz fiber.
Further, the functional material is prepared by mixing a plurality of raw materials in parts by weight, and comprises 50-70 parts of resin, 15-30 parts of curing agent, 5-15 parts of wave absorber filler and 10-15 parts of foaming agent.
Further, the pile warp layer and the upper and lower layers of the SiC fibers in the wave-absorbing layer are integrally woven, and then are solidified; after the multi-interlayer hollow composite material is cured, resin foaming is carried out on the pile warp layer to form wave-absorbing foam; the wave-absorbing foam is tightly connected with the pile warp layer to form a wave-absorbing functional layer.
In order to achieve the aim of the invention, the invention discloses a preparation method of a multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material, which comprises the following steps:
step 1, weaving and solidifying prepared low dielectric loss fibers, siC fibers and carbon fibers or metal fibers to form a fabric, wherein quartz fibers are used as a wave-transmitting layer at the uppermost layer during weaving, siC fibers are used as a wave-absorbing layer at the pile warp layer, and carbon fibers are used as a reflecting layer at the lowermost layer;
step 2, the functional material for absorbing the waves is obtained by mixing a plurality of raw materials in parts by weight, wherein the functional material comprises 50-70 parts of resin, 15-30 parts of curing agent, 5-15 parts of wave absorber filler and 10-15 parts of foaming agent, and the raw materials are uniformly mixed by an ultrasonic dispersing instrument to obtain wave absorbing dispersion liquid;
step 3, uniformly filling the wave-absorbing dispersion liquid into the pile warp layer of the multi-interlayer hollow fabric, wherein the volume ratio of the wave-absorbing dispersion liquid in the cavity of the pile warp layer is 1/3-3/5;
step 4, placing the poured multi-interlayer hollow fabric into an oven for foaming, wherein the foaming process parameters are as follows: and forming the multi-interlayer hollow composite material at the temperature of between 70 and 80 ℃ for 2 to 3 hours.
Compared with the prior art, the invention has the remarkable progress that: 1) The wave-transmitting-wave-absorbing-reflecting structure integrated composite material adopts a hollow fabric composite material structure, wave-absorbing foam is filled in the cavity, and the whole composite material has the advantages of light weight, high structural strength, good wave-absorbing performance and the like; 2) The wave-transmitting-wave-absorbing-reflecting structure hollow fabric composite material is formed by integrally weaving; 3) The wave-transmitting-absorbing-reflecting hollow fabric can be designed into a single interlayer, a double interlayer, a three interlayer and the like; 4) The pile warp of the hollow fabric with the multi-interlayer wave-transmitting-absorbing-reflecting structure can be designed into different structures, including but not limited to 8-shaped, V-shaped and the like; 5) The wave-absorbing foam is formed by adding wave-absorbing agent into resin to foam and form a compact structure with the pile warp.
In order to more clearly describe the functional characteristics and structural parameters of the present invention, the following description is made with reference to the accompanying drawings and detailed description.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of a multi-layer wave-transparent-absorbing-reflecting structure integrated composite material structure
FIG. 2 is a graph showing the wave absorbing properties of a 1% carbon black/hollow fabric composite;
FIG. 3 is a graph showing the wave absorbing properties of a 2% carbon black/hollow fabric composite;
FIG. 4 is a schematic flow chart of a method for preparing a multi-interlayer wave-transmitting-absorbing-reflecting structure integrated composite material;
the reference numerals in the drawings are: 1. a wave-transmitting layer; 2. a wave absorbing layer; 3. a reflective layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a multi-interlayer wave-transmitting-absorbing-reflecting structure integrated composite material, wherein the multi-interlayer hollow composite material comprises multi-interlayer hollow fabrics and functional materials; the multi-interlayer hollow fabric is formed by integrally knitting, is not connected by a glue film, and is mixed with functional materials; the functional material comprises a functional material matrix, wherein the functional material matrix is a resin material with good mechanical property and environmental resistance; the functional material inside the multi-interlayer hollow fabric is mixed with a wave absorber filler to form wave absorbing foam with environment resistance and wave absorbing performance, and the wave absorber filler is tiny particles with electromagnetic loss capacity; the multi-interlayer hollow fabric comprises a wave-transmitting layer 1, a wave-absorbing layer 2 and a reflecting layer 3 in sequence from top to bottom, wherein the wave-transmitting layer 1 is a low dielectric loss fiber; the wave-absorbing layer 2 is a pile warp layer of SiC fibers and is mixed with wave-absorbing foam; the reflective layer 3 is made of a material selected from the group consisting of metal wires and carbon fibers. The multi-interlayer hollow composite material adopts the structural form of a wave-transmitting-wave-absorbing-reflecting layer to integrally weave the hollow fabric. Namely, the upper surface layer of the hollow fabric is used as a wave-transmitting layer 1; the pile warp layer is focused on the wave absorbing function, and the lower layer serves as a reflecting layer 3. In order to increase the wave absorbing performance, the multi-interlayer integrated weaving can be designed, and the wave absorbing foam is filled in the pile warp layer, so that the reflectivity can be effectively improved. Electromagnetic waves are incident on the material and enter the material through the wave-transmitting layer 1; electromagnetic waves entering the interior of the material are absorbed and continuously reflected and attenuated at the wave-absorbing layer 2.
Specifically, in the present embodiment, the wave-transmitting-absorbing-reflecting structure hollow fabric may be designed as a single sandwich, a double sandwich, a triple sandwich, or the like.
The reflectivity of the wave-absorbing composite material is less than or equal to-5 dB in the frequency range of 8 GHz-18 GHz. The tensile strength of the surface layer of the wave absorbing material with the structure is 613MPa in the warp direction and 491MPa in the weft direction, the bending strength is 153.6MPa, and the interlayer shearing strength is 19.8MPa. The reflectivity curves of the carbon black/integral laminated hollow fabric composite material are shown in figures 2 and 3, and the reflection loss of the 1% carbon black/integral laminated hollow fabric composite material integrally fluctuates between 0 dB and-5 dB. After the carbon black wave absorber with the concentration of 2% is added, the reflection loss of the prepared wave-absorbing type integral laminated fabric composite material is obviously enhanced, namely the wave absorbing performance is obviously improved. Through analysis, the wave absorber is attached to the pile warp by taking resin as a carrier, the higher the content of the wave absorber is, the higher the proportion of wave absorbing functional bodies in the cavity is, when an incident electromagnetic wave enters the pile warp wave absorbing layer through the wave transmitting surface layer, the electromagnetic wave is reflected by the pile warp and absorbed by the wave absorber to be lost, and when the rest part reaches the interface of the reflecting layer, the electromagnetic wave is reflected back to the pile warp layer for multiple reflection, so that the loss of the electromagnetic wave is increased.
As shown in fig. 4, a preparation method of the multi-interlayer wave-transmitting-absorbing-reflecting structure integrated composite material comprises the following steps:
step 1, weaving and solidifying prepared low dielectric loss fibers, siC fibers and carbon fibers or metal fibers to form a fabric, wherein quartz fibers are used as a wave-transmitting layer at the uppermost layer during weaving, siC fibers are used as a wave-absorbing layer at the pile warp layer, and carbon fibers are used as a reflecting layer at the lowermost layer;
step 2, the functional material for absorbing the waves is obtained by mixing a plurality of raw materials in parts by weight, wherein the functional material comprises 50-70 parts of resin, 15-30 parts of curing agent, 5-15 parts of wave absorber filler and 10-15 parts of foaming agent, and the raw materials are uniformly mixed by an ultrasonic dispersing instrument to obtain wave absorbing dispersion liquid;
step 3, uniformly filling the wave-absorbing dispersion liquid into the pile warp layer of the multi-interlayer hollow fabric, wherein the volume ratio of the wave-absorbing dispersion liquid in the cavity of the pile warp layer is 1/3-3/5;
step 4, placing the poured multi-interlayer hollow fabric into an oven for foaming, wherein the foaming process parameters are as follows: and forming the multi-interlayer hollow composite material at the temperature of between 70 and 80 ℃ for 2 to 3 hours.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material is characterized in that the multi-interlayer hollow composite material comprises multi-interlayer hollow fabrics and functional materials; the multi-interlayer hollow fabric is formed by integrally knitting, is not connected by a glue film, and is mixed with functional materials; the functional material comprises a functional material matrix, wherein the functional material matrix is a resin material with good mechanical properties and environmental resistance; the functional material inside the multi-interlayer hollow fabric is mixed with a wave absorber filler to form wave absorbing foam with environment resistance and wave absorbing performance, and the wave absorber filler is tiny particles with electromagnetic loss capacity; the multi-interlayer hollow fabric comprises a wave-transmitting layer, a wave-absorbing layer and a reflecting layer from top to bottom in sequence, wherein the wave-transmitting layer is a low dielectric loss fiber; the wave-absorbing layer is a pile warp layer of SiC fibers and is mixed with wave-absorbing foam; the reflective layer is made of metal wires or carbon fibers.
2. The multi-interlayer wave-transmitting-absorbing-reflecting structure integrated composite material according to claim 1, wherein the sandwich structure of the pile warp layer of SiC fibers comprises one or more structural combinations of "8" type, "W" type, "V" type, "pi" type, "O" type, "ii" type and "x" type.
3. The multi-interlayer wave-transmitting-absorbing-reflecting structure integrated composite material according to claim 1, wherein the different interlayer heights of the multi-interlayer hollow fabric are 2-20 mm, and the total height is 5-40 mm.
4. The multi-interlayer wave-transmitting-absorbing-reflecting structure integrated composite material according to claim 1, wherein the functional material matrix comprises phenolic resin and epoxy resin; the wave absorber filler comprises carbon nanotubes and carbon black; the wave-transmitting layer fiber comprises glass fiber and quartz fiber.
5. The multi-interlayer wave-transmitting-absorbing-reflecting structure integrated composite material according to claim 1, wherein the functional material is obtained by mixing a plurality of raw materials in parts by weight and comprises 50-70 parts of resin, 15-30 parts of curing agent, 5-15 parts of wave absorber filler and 10-15 parts of foaming agent.
6. The multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material according to claim 1, wherein the pile warp layer of SiC fiber in the wave-absorbing layer is integrally woven with the upper and lower layers, and then cured; after the multi-interlayer hollow composite material is cured, resin foaming is carried out on the pile warp layer to form wave-absorbing foam; the wave-absorbing foam is tightly connected with the pile warp layer to form a wave-absorbing functional layer.
7. A method for preparing a multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material, which is based on the multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material as claimed in claims 1-6, and is characterized by comprising the following steps:
step 1, weaving and solidifying prepared low dielectric loss fibers, siC fibers and carbon fibers or metal fibers to form a fabric, wherein quartz fibers are used as a wave-transmitting layer at the uppermost layer during weaving, siC fibers are used as a wave-absorbing layer at the pile warp layer, and carbon fibers are used as a reflecting layer at the lowermost layer;
step 2, the functional material for absorbing the waves is obtained by mixing a plurality of raw materials in parts by weight, wherein the functional material comprises 50-70 parts of resin, 15-30 parts of curing agent, 5-15 parts of wave absorber filler and 10-15 parts of foaming agent, and the raw materials are uniformly mixed by an ultrasonic dispersing instrument to obtain wave absorbing dispersion liquid;
step 3, uniformly filling the wave-absorbing dispersion liquid into the pile warp layer of the multi-interlayer hollow fabric, wherein the volume ratio of the wave-absorbing dispersion liquid in the cavity of the pile warp layer is 1/3-3/5;
step 4, placing the poured multi-interlayer hollow fabric into an oven for foaming, wherein the foaming process parameters are as follows: and forming the multi-interlayer hollow composite material at the temperature of between 70 and 80 ℃ for 2 to 3 hours.
CN202211530680.9A 2022-12-01 2022-12-01 Multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and preparation method thereof Pending CN116512686A (en)

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CN202211530680.9A CN116512686A (en) 2022-12-01 2022-12-01 Multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and preparation method thereof

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Application Number Priority Date Filing Date Title
CN202211530680.9A CN116512686A (en) 2022-12-01 2022-12-01 Multi-interlayer wave-transmitting-wave-absorbing-reflecting structure integrated composite material and preparation method thereof

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CN116512686A true CN116512686A (en) 2023-08-01

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