阅读说明：本技术 一种定向编织的柔性伪装复合材料及其制备方法 (Directionally-woven flexible camouflage composite material and preparation method thereof ) 是由 王富强 边永亮 郇峰 张少波 王永胜 李伟 荣伟 于 2021-10-19 设计创作，主要内容包括：本发明属于功能性织物领域,涉及一种定向编织的柔性伪装复合材料及其制备方法,包括基布层和植物仿生体,所述基布层由导电导磁纤维和非导电纤维编织而成；所述植物仿生体包括若干个导电导磁仿生体和非导体电仿生体,若干个导电导磁仿生体和非导体电仿生体均定向编织在基布层上。本发明将导电碳纤维与非导电纤维混杂编织,通过定向织造构建织物基的仿生结构,实现其对雷达波的散射功能,同时在织物表面喷涂红外和可见光伪装涂层,实现其多频谱伪装的功能。(The invention belongs to the field of functional fabrics, and relates to a directionally-woven flexible camouflage composite material and a preparation method thereof, wherein the directionally-woven flexible camouflage composite material comprises a base cloth layer and a plant bionic body, wherein the base cloth layer is woven by conductive and magnetic fibers and non-conductive fibers; the plant bionic body comprises a plurality of electric conduction and magnetic conduction bionic bodies and non-conductor bionic bodies, and the electric conduction and magnetic conduction bionic bodies and the non-conductor bionic bodies are directionally woven on the base cloth layer. The invention weaves the conductive carbon fiber and the non-conductive fiber in a mixed way, constructs a bionic structure of a fabric base through directional weaving, realizes the scattering function of the bionic structure to radar waves, and simultaneously sprays infrared and visible light camouflage coatings on the surface of the fabric, and realizes the multi-spectrum camouflage function of the bionic structure.)

1. An oriented woven flexible camouflage composite material, which is characterized in that: the plant bionic body is characterized by comprising a base cloth layer and a plant bionic body, wherein the base cloth layer is formed by weaving conductive and magnetic fibers and non-conductive fibers; the plant bionic body comprises a plurality of electric conduction and magnetic conduction bionic bodies and non-conductor bionic bodies, and the electric conduction and magnetic conduction bionic bodies and the non-conductor bionic bodies are directionally woven on the base cloth layer.

2. An directionally woven, flexible camouflage composite according to claim 1, wherein: the warp-weft ratio of the conductive magnetic conduction fiber to the non-conductive fiber in the base cloth layer is 3-10: 1.

3. an directionally woven, flexible camouflage composite according to claim 1, wherein: the plurality of the electric conduction and magnetic conduction bionic bodies and the non-conductor electric bionic bodies are divided into a plurality of rows, and a row of non-conductor electric bionic bodies is arranged between every two rows of the electric conduction and magnetic conduction bionic bodies.

4. An directionally woven, flexible camouflage composite according to claim 3, wherein: the distance between each row of conductive bionic bodies and the non-conductive bionic bodies is 2-15 mm; the length of the electric and magnetic conduction bionic body and the length of the non-conductor bionic body are both 15-50 mm.

5. An directionally woven, flexible camouflage composite according to claim 1, wherein: the electric and magnetic conduction bionic body is made of electric and magnetic conduction fibers, and the non-conductor electric bionic body is made of non-electric conduction fibers.

6. An directionally woven, flexible camouflage composite according to claim 1 or 4, wherein: the conductive and magnetic conductive fiber adopts carbon fiber or metal-plated carbon fiber; the non-conductive fiber is any one of glass fiber, aramid fiber and plant fiber.

7. An directionally woven, flexible camouflage composite according to claim 1, wherein: the base cloth layer and the plant bionic body are both provided with an infrared camouflage coating and a visible light camouflage coating; the visible light camouflage coating is positioned outside the infrared camouflage coating.

8. A preparation method of a directionally woven flexible camouflage composite material is characterized by comprising the following steps:

s1, base cloth layer: weaving conductive and magnetic conductive fibers and non-conductive fibers into a mesh cloth;

s2, plant biont: directionally implanting conductive fibers and non-conductive fibers on the gridding cloth obtained in the step S1 to form a plant bionic body on the base cloth layer;

s3, infrared camouflage coating spraying: spraying the infrared camouflage coating material on the surface of the finished product of S2, and drying and curing;

s4, spraying a visible light camouflage coating: spraying the visible camouflage coating material on the surface of the finished product of S3, and drying and curing.

9. The method of claim 8, wherein the step of preparing the directionally-woven flexible camouflage composite comprises the steps of: the weight percentages of the components are as follows: 5-30% of conductive and magnetic fiber, 60-85% of non-conductive fiber, 3-5% of infrared camouflage coating material, 3-5% of visible light camouflage coating material and less than 3% of auxiliary agent.

10. The method of claim 8, wherein the step of preparing the directionally-woven flexible camouflage composite comprises the steps of: the infrared camouflage coating comprises the following components in parts by weight: 80-100 parts of water-based resin, 30-50 parts of metal micro powder, 10-100 parts of curing agent and 20-100 parts of distilled water;

the visible light camouflage coating comprises the following components in parts by weight: 80-100 parts of water-based resin, 10-20 parts of pigment, 10-100 parts of curing agent and 10-50 parts of distilled water.

Technical Field

The invention belongs to the field of functional fabrics, and relates to a directionally-woven flexible camouflage composite material and a preparation method thereof.

Background

With the proposal of ocean strategy in China, the importance of ocean rights and interests is increasingly promoted, and more weaponry are deployed in the southeast coastal areas to ensure the safety and stability of the southeast coastal areas in China. However, the southeast coastal areas have severe climate environments, are located in typical subtropical and tropical marine climate areas, and are mainly characterized by high insolation, high temperature, high humidity and high salt fog, so that stealth and camouflage materials used in the severe environments face severe tests.

At present, most camouflage net base materials adopted in the market are formed by weaving synthetic materials of polyester, polyamide or polyester braided fabric, polyester fibers and metal fibers in a mixed mode. Due to the limitation of the base material, under the conditions of high salt spray, acid and alkali, high temperature and solar irradiation, the environmental adaptability is difficult to promote, the environmental adaptability can only be met for 1 year at most, the existing service life requirement cannot be met, and a novel protective material is required to meet the camouflage requirement.

Aiming at the problems in the prior art, the demand for researching and designing a novel flexible camouflage material which has long time, excellent reliable camouflage effect and can replace the function of the existing camouflage net is urgent.

Aiming at the problems of poor strength, short service life, insufficient protective capability and the like of the traditional camouflage net products, the invention discloses a severe environment resistant bionic flexible camouflage composite material based on hybrid fiber directional weaving, which has good visible light, infrared and radar wave camouflage performance, can be used for a long time in high insolation, high temperature, high humidity and high salt spray environments, and can be used as an upgraded substitute product of the traditional camouflage net.

Chinese patent CN 107813399A 'a herbaceous plant based weather-proof stealth board and a preparation method thereof' reports a herbaceous plant based weather-proof stealth board, which is composed of herbaceous plant powder, liquid cellulose nanofiber, hollow microspheres, silicate nano additive and the like, and has the functions of sound insulation, heat insulation, weather resistance, corrosion resistance and good electromagnetic stealth performance.

CN 108278929A 'camouflage grass capable of hiding in radar and near infrared and preparation method thereof' reports a camouflage grass capable of hiding in radar and near infrared and preparation method thereof, the camouflage grass comprises: polymer film sheet, grass body, radar wave stealth paint and near-infrared stealth paint; the grass body is cut into a structure similar to a grass shape by a high polymer film; the grass body is stuck on the surface of the polymer film sheet to form artificial grass; spraying radar wave stealth paint on the surface of the cut artificial grass by using a high-pressure airless sprayer, and spraying near-infrared stealth paint on the surface of the cut artificial turf and curing after curing.

CN 112776372A 'a structure function integrated continuous fiber resin-based wave-absorbing stealth composite material and a preparation method thereof' reports a structure function integrated continuous fiber resin-based wave-absorbing stealth composite material and a preparation method thereof; the structural wave-absorbing composite material is formed by compounding a wave-transmitting layer, a wave-absorbing layer and a reflecting layer in sequence. The composite material has the characteristics of wide raw material source, stable forming process, convenient operation and excellent wave-absorbing performance and mechanical performance.

In summary, although research attempts are currently made on bionic camouflage materials, the application of continuous fiber bionic structure fabrics for camouflage materials in high-strength and severe environments is less. And is inferior in radar wave camouflage and the like.

Disclosure of Invention

Aiming at the technical problems, the invention provides a directionally-woven flexible camouflage composite material and a preparation method thereof, which can realize good visible light, infrared and radar wave camouflage performance and can be used for a long time in high-exposure, high-temperature, high-humidity and high-salt-spray environments.

In order to solve the technical problems, the invention adopts the technical scheme that:

an oriented woven flexible camouflage composite material comprises a base cloth layer and a plant bionic body, wherein the base cloth layer is woven by conductive and magnetic fibers and non-conductive fibers; the plant bionic body comprises a plurality of electric conduction and magnetic conduction bionic bodies and non-conductor bionic bodies, and the electric conduction and magnetic conduction bionic bodies and the non-conductor bionic bodies are directionally woven on the base cloth layer.

The warp-weft ratio of the conductive magnetic conduction fiber to the non-conductive fiber in the base cloth layer is 3-10: 1.

the plurality of the electric conduction and magnetic conduction bionic bodies and the non-conductor electric bionic bodies are divided into a plurality of rows, and a row of non-conductor electric bionic bodies is arranged between every two rows of the electric conduction and magnetic conduction bionic bodies.

The distance between each row of conductive bionic bodies and the non-conductive bionic bodies is 2-15 mm; the length of the electric and magnetic conduction bionic body and the length of the non-conductor bionic body are both 15-50 mm.

The electric and magnetic conduction bionic body is made of electric and magnetic conduction fibers, and the non-conductor electric bionic body is made of non-electric conduction fibers.

The conductive and magnetic conductive fiber adopts carbon fiber or metal-plated carbon fiber; the non-conductive fiber is any one of glass fiber, aramid fiber and plant fiber.

The base cloth layer and the plant bionic body are both provided with an infrared camouflage coating and a visible light camouflage coating; the visible light camouflage coating is positioned outside the infrared camouflage coating.

A preparation method of a directionally woven flexible camouflage composite material comprises the following steps:

s1, base cloth layer: weaving conductive and magnetic conductive fibers and non-conductive fibers according to a warp-weft ratio of 3-10: 1 to form a mesh cloth with the thickness of 0.5-3 mm;

s2, plant biont: directionally implanting conductive fibers and non-conductive fibers on the gridding cloth obtained in the step S1 to form a plant bionic body on the base cloth layer;

s3, infrared camouflage coating spraying: spraying the infrared camouflage coating material on the surface of the finished product of S2, and drying and curing;

s4, spraying a visible light camouflage coating: spraying the visible camouflage coating material on the surface of the finished product of S3, and drying and curing.

5-30% of conductive and magnetic fiber, 60-85% of non-conductive fiber, 3-5% of infrared camouflage coating material, 3-5% of visible light camouflage coating material and less than 3% of auxiliary agent.

The infrared camouflage coating comprises the following components in parts by weight: 80-100 parts of water-based resin, 30-50 parts of metal micro powder, 10-100 parts of curing agent and 20-100 parts of distilled water;

the visible light camouflage coating comprises the following components in parts by weight: 80-100 parts of water-based resin, 10-20 parts of pigment, 10-100 parts of curing agent and 10-50 parts of distilled water.

Compared with the prior art, the invention has the following beneficial effects:

the invention mixes and weaves the conductive carbon fiber and the non-conductive fiber to obtain the mixed fabric (base fabric layer), constructs the bionic structure of the fabric base through directional weaving to realize the scattering function of the fabric base to radar waves, and simultaneously sprays infrared and visible light camouflage coatings on the surface of the fabric to realize the multi-spectrum camouflage function of the fabric.

Aiming at the problems of poor strength, short service life, insufficient protective capability and the like of the traditional camouflage net products, the invention discloses a severe environment resistant bionic flexible camouflage composite material based on hybrid fiber directional weaving, which has good visible light, infrared and radar wave camouflage performance.

The preparation method comprises the steps of weaving the hybrid fiber bionic structure fabric, spraying the infrared camouflage coating, spraying the visible light camouflage coating, curing and drying. The flexible camouflage composite material prepared by the method has the characteristics of light weight, high strength, good weather resistance and good camouflage effect, and is a novel flexible multi-band camouflage material.

The flexible camouflage material has simple weaving process and strong reliability, and is combined with the infrared and visible camouflage coating sprayed on the surface to realize a camouflage material based on a mixed fiber fabric form.

Drawings

FIG. 1 is a front view of the fabric of the present invention;

FIG. 2 is a top view of the fabric of the present invention;

FIG. 3 is a schematic representation of the surface coating structure of the individual fibers of the present invention;

wherein: 1 is non-conductive fiber, 2 is conductive magnetic fiber, 3 is mixed fabric, 4 is interface layer, 5 is infrared camouflage layer, and 6 is visible light camouflage layer.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, an oriented woven flexible camouflage composite comprises a base cloth layer and a plant bionic body, wherein the base cloth layer is a hybrid fabric woven by conductive and magnetic fibers and non-conductive fibers; the plant bionic body comprises a plurality of electric and magnetic conduction bionic bodies and non-conductor bionic bodies, and the electric and magnetic conduction bionic bodies and the non-conductor bionic bodies are directionally woven on the base cloth layer.

Directional weaving refers to weaving arrangement according to a design direction, and for the present invention, it is preferable to weave the base fabric perpendicularly.

The weaving structure is a plant bionic structure combining plane weaving and vertical implantation. The composite material is woven by weaving fibers (mixed fibers) with different dielectric properties; the fabric has a plant bionic structure, namely the whole fabric is a hybrid fiber bionic structure fabric.

The scattering performance can be improved by adopting the conductive non-conductive fibers to carry out warp-weft and space directional weaving, so that radar detection camouflage is realized.

Further, the warp-weft ratio of the conductive magnetic fiber and the non-conductive fiber in the base cloth layer is 3-10: 1.

the surface of the base cloth is directionally woven into a form of conductive magnetic fibers and non-conductive fibers which are regularly arranged, and a radar wave scattering relation is formed between the conductive magnetic fibers and the non-conductive fibers.

Furthermore, the plurality of the electric conduction and magnetic conduction bionic bodies and the non-conductor electric bionic bodies are divided into a plurality of rows, and a row of non-conductor electric bionic bodies is arranged between every two rows of the electric conduction and magnetic conduction bionic bodies.

The corresponding arrangement method is realized by the base cloth form consisting of the conductive and magnetic fibers and the non-conductive fibers and the radar wave scattering index.

Furthermore, the distance between each row of the conductive electromagnetic bionic bodies and the non-conductive electric bionic bodies is 2-15 mm; the length of the electric and magnetic conduction bionic body and the length of the non-conductor bionic body are both 15-50 mm. By adjusting the conductive and non-conductive fiber line/row spacing, different radar scattering frequencies can be accommodated.

The base cloth form composed of the conductive and magnetic conductive fibers and the non-conductive fibers can realize a corresponding arrangement method with radar wave scattering indexes; for the protection of X-band (8GHz-12GHz) electromagnetic wave, the gap between the conduction and non-conduction of the base fabric can be designed to be within 0.6 cm-1.9 cm because the wavelength of the electromagnetic wave is between 2.5 cm and 3.8 cm, and the conductive structure within the range of half wavelength to quarter wavelength (0.6 cm-1.9 cm) has an action relationship with the electromagnetic wave.

The surface of the base cloth is directionally woven into a form of conductive magnetic fibers and non-conductive fibers which are regularly arranged, and a radar wave scattering relation is formed between the conductive magnetic fibers and the non-conductive fibers; the design of the gaps between the oriented fibers is 0.6-1.9 cm, which is the same as 1, so that the scattering effect under the corresponding electromagnetic wave frequency is realized.

The flexible fabric compounded by the fabric combination form and the infrared and visible light camouflage coating not only realizes the radar wave scattering effect, but also realizes multi-band camouflage.

Furthermore, the electric and magnetic conduction bionic body is made of electric and magnetic conduction fibers, and the non-conductor electric bionic body is made of non-electric conduction fibers.

Further, the conductive and magnetic conductive fibers and the non-conductive fibers in the base fabric layer are woven, and include glass fibers, aramid fibers, carbon fibers, metal-plated carbon fibers, and plant fibers (such as hemp fibers and bamboo fibers), but are not limited to the above.

Similarly, the conducting and magnetic fiber adopted by the conducting and magnetic bionic body and the non-conducting electric bionic body are non-conducting fibers, and the fibers are also adopted.

Further, the base cloth layer and the plant bionic body are both provided with an infrared camouflage coating and a visible light camouflage coating; the visible light camouflage coating is positioned outside the infrared camouflage coating. Infrared and visible light stealth paint is sprayed on the surfaces of the base cloth layer and the plant bionic body, so that multi-band camouflage can be realized.

A preparation method of a directionally woven flexible camouflage composite material comprises the following steps:

s1, base cloth layer: weaving conductive and magnetic conductive fibers and non-conductive fibers according to a warp-weft ratio of 3-10: 1 to form a mesh cloth with the thickness of 0.5-3 mm;

s2, plant biont: directionally implanting conductive fibers and non-conductive fibers on the gridding cloth obtained in the step S1 to form a plant bionic body on the base cloth layer;

s3, infrared camouflage coating spraying: spraying the infrared camouflage coating material on the surface of the finished product of S2, and drying and curing;

s4, spraying a visible light camouflage coating: spraying the visible camouflage coating material on the surface of the finished product of S3, and drying and curing.

Specifically, the method comprises the following steps: and drying the fiber fabric sprayed at the temperature of S4 for 48 hours at room temperature, and then cutting according to the required size to obtain the bionic flexible camouflage composite materials with different specifications.

Further, the bionic flexible camouflage composite material provided by the invention is prepared from five components in percentage by weight: 5-10% of conductive magnetic fiber, 60-75% of non-conductive fiber, 3-5% of infrared camouflage coating material, 3-5% of visible light camouflage coating material and less than 3% of other auxiliary agents.

The auxiliary agent refers to an interface treating agent and the like on the surface of the fiber, and helps to improve the binding force between the coating and the surface of the fiber. That is, the interfacial layer may be formed as a transition layer formed by an aid that helps the fiber surface form a reliable bond with the surface coating.

Further, preparing an infrared camouflage coating material, sequentially adding 100 parts of water-based resin (such as water-based polyurethane resin, water-based acrylic resin, water-based epoxy resin and water-based alkyd resin), 30-50 parts of vanadium dioxide micropowder (or modified indium oxide with an infrared absorption function, zinc oxide and the like), 10-100 parts of curing agent (water-based polyurethane curing agent, water-based epoxy curing agent, water-based acrylic curing agent and water-based alkyd curing agent) and 20-100 parts of distilled water according to a designed proportion, and adding into a stirring barrel to stir uniformly for later use.

Further, preparing a camouflage coating material, sequentially adding 100 parts of water-based resin (such as water-based polyurethane resin, water-based acrylic resin, water-based epoxy resin and water-based alkyd resin), 15-20 parts of pigment (including yellow, red, blue, green and the like), 10-100 parts of curing agent (water-based polyurethane curing agent, water-based epoxy curing agent, water-based acrylic curing agent and water-based alkyd curing agent) and 10-50 parts of distilled water according to a designed proportion, and adding the mixture into a stirring barrel to be uniformly stirred for later use.

Example 1

Comprises a base cloth layer 3 consisting of mixed fibers, conductive and magnetic fibers 2 which are woven in an oriented way, and non-conductive fibers 3.

The preparation method of the material comprises the following steps:

s1: base cloth knitting

As shown in figure 2, 6k nickel-plated carbon fiber and 4800Tex glass fiber are woven according to the warp-weft ratio of 5:1 to form the mesh fabric with the thickness of about 1-2 mm.

S2: directional fabric weaving (plant bionics)

And (3) directionally weaving the 12k nickel-plated carbon fiber cloth and 9600Tex glass fibers on the surface of the base cloth finished in the S1 according to the structures shown in the figures 1 and 2, wherein the arrangement interval is 2mm, and the length of the directional fabric is 20-30 mm.

S3: infrared camouflage coating material spraying

And spraying the prepared infrared camouflage coating material on the surface of the finished product of S2 by using a high-pressure spraying machine, and drying and curing.

Specifically, the method comprises the following steps: preparing an infrared camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 35 parts of vanadium dioxide micropowder, 100 parts of waterborne epoxy curing agent and 100 parts of distilled water according to a designed proportion, and adding into a stirring barrel to be uniformly stirred for later use.

The infrared camouflage coating material can meet the infrared camouflage spectrum requirement.

S4: visible light camouflage coating material spraying

And spraying the prepared visible light camouflage coating material on the surface of the finished product of S3 by using a high-pressure sprayer, and drying and curing.

Specifically, the method comprises the following steps: according to the requirements of visible light camouflage, camouflage coating materials are prepared, 100 parts of waterborne epoxy resin, 20 parts of green pigment, 100 parts of waterborne epoxy curing agent and 50 parts of distilled water are sequentially added according to the design proportion, and the mixture is added into a stirring barrel to be uniformly stirred for standby.

The camouflage coating material configured above can meet the requirements of visible light camouflage.

Curing, drying, processing and cutting: and drying the fiber fabric sprayed in the step S4 at room temperature for 48 hours, and then cutting according to the required size to obtain the bionic flexible camouflage composite material.

And (3) testing: the bionic flexible camouflage composite material visible light, infrared and radar wave camouflage performance is tested by referring to GJB 4797A-2015 ground missile array camouflage requirement, and the following technical parameters are obtained:

visible light camouflage index: the wavelength range of the countermeasure is 0.3-2.5 μm, and the color difference of the dominant color of the target and the typical background is as follows: less than or equal to 2 color difference units; average brightness contrast value of target false mounting surface and background visible light: less than or equal to 0.10; contrast ratio of brightness between patches of colors of the camouflage spots: not less than 0.4.

Infrared camouflage indexes: the anti-wave band is 3-5 μm, 8-14 μm, the average radiation temperature difference absolute value (heat source working state) between the camouflage surface and the background: at most 4 ℃.

Radar stealth index: the reflection attenuation of L, S wave band is not less than 5dB, the reflection attenuation of C, X, Ku and Ka wave band is not less than 8dB, and the reflection attenuation of millimeter wave band is not less than 15 dB.

Example 2

Comprises a base cloth layer 3 consisting of mixed fibers, conductive and magnetic fibers 2 which are woven in an oriented way, and non-conductive fibers 3.

The preparation method of the material comprises the following steps:

s1: base cloth knitting

As shown in figure 2, 6k copper-plated carbon fiber and 1200D glass fiber are woven according to the warp-weft ratio of 4:1 to form the mesh cloth shown in the figure, and the thickness of the mesh cloth is about 0.5-1 mm.

S2: directional fabric weaving

And (3) directionally weaving the 12k nickel-plated carbon fiber cloth and 2400D aramid fiber on the surface of the base cloth finished in the S1 according to the structures shown in the figures 1 and 2, wherein the arrangement interval is 1mm, and the length of the directional fabric is 20-25 mm.

S3: infrared camouflage coating material spraying

And spraying the prepared infrared camouflage coating material on the surface of the finished product of S2 by using a high-pressure spraying machine, and drying and curing.

Specifically, the method comprises the following steps: preparing an infrared camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 35 parts of vanadium dioxide micropowder, 100 parts of waterborne epoxy curing agent and 100 parts of distilled water according to a designed proportion, and adding into a stirring barrel to be uniformly stirred for later use.

The infrared camouflage coating material can meet the infrared camouflage spectrum requirement.

S4: visible light camouflage coating material spraying

And spraying the prepared visible light camouflage coating material on the surface of the finished product of S3 by using a high-pressure sprayer, and drying and curing.

Specifically, the method comprises the following steps: preparing a camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 20 parts of green pigment, 100 parts of waterborne epoxy curing agent and 50 parts of distilled water according to a designed proportion, and adding the mixture into a stirring barrel to be uniformly stirred for later use.

The camouflage coating material configured above can meet the requirements of visible light camouflage.

Curing, drying, processing and cutting: and S4 drying the sprayed fiber fabric at room temperature for 48 hours, and cutting according to the required size to obtain the bionic flexible camouflage composite material.

And (3) testing: the bionic flexible camouflage composite material visible light, infrared and radar wave camouflage performance is tested by referring to GJB 4797A-2015 ground missile array camouflage requirement, and the following technical parameters are obtained:

visible light camouflage index: the wavelength range of the countermeasure is 0.3-2.5 μm, and the color difference of the dominant color of the target and the typical background is as follows: less than or equal to 2 color difference units; average brightness contrast value of target false mounting surface and background visible light: less than or equal to 0.10; contrast ratio of brightness between patches of colors of the camouflage spots: not less than 0.4.

Infrared camouflage indexes: the anti-wave band is 3-5 μm, 8-14 μm, the average radiation temperature difference absolute value (heat source working state) between the camouflage surface and the background: at most 4 ℃.

Radar stealth index: the reflection attenuation of L, S wave band is not less than 4dB, the reflection attenuation of C, X, Ku and Ka wave band is not less than 10dB, and the reflection attenuation of millimeter wave band is not less than 12 dB.

Example 3

Comprises a base cloth layer 3 consisting of mixed fibers, conductive and magnetic fibers 2 which are woven in an oriented way, and non-conductive fibers 3.

The preparation method of the material comprises the following steps:

s1: base cloth knitting

As shown in fig. 2, 3k nickel-plated carbon fiber and 9600Tex glass fiber are woven according to the warp-weft ratio of 10:1 to form the mesh fabric with the thickness of about 2-3 mm.

S2: directional fabric weaving

And (3) directionally weaving the 12k nickel-plated carbon fiber cloth and 9600Tex glass fibers on the surface of the base cloth finished in the S1 according to the structures shown in the figures 1 and 2, wherein the arrangement interval is 3mm, and the length of the directional fabric is 30-35 mm.

S3: infrared camouflage coating material spraying

And spraying the prepared infrared camouflage coating material on the surface of the finished product of S2 by using a high-pressure spraying machine, and drying and curing.

Specifically, the method comprises the following steps: preparing an infrared camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 35 parts of vanadium dioxide micropowder, 100 parts of waterborne epoxy curing agent and 100 parts of distilled water according to a designed proportion, and adding into a stirring barrel to be uniformly stirred for later use.

The infrared camouflage coating material can meet the infrared camouflage spectrum requirement.

S4: visible light camouflage coating material spraying

And spraying the prepared visible light camouflage coating material on the surface of the finished product of S3 by using a high-pressure sprayer, and drying and curing.

Specifically, the method comprises the following steps: preparing a camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 20 parts of green pigment, 100 parts of waterborne epoxy curing agent and 50 parts of distilled water according to a designed proportion, and adding the mixture into a stirring barrel to be uniformly stirred for later use.

The camouflage coating material configured above can meet the requirements of visible light camouflage.

Curing, drying, processing and cutting: and S4 drying the sprayed fiber fabric at room temperature for 48 hours, and cutting according to the required size to obtain the bionic flexible camouflage composite material.

And (3) testing: the bionic flexible camouflage composite material visible light, infrared and radar wave camouflage performance is tested by referring to GJB 4797A-2015 ground missile array camouflage requirement, and the following technical parameters are obtained:

visible light camouflage index: the wavelength range of the countermeasure is 0.3-2.5 μm, and the color difference of the dominant color of the target and the typical background is as follows: less than or equal to 2 color difference units; average brightness contrast value of target false mounting surface and background visible light: less than or equal to 0.10; contrast ratio of brightness between patches of colors of the camouflage spots: not less than 0.4.

Infrared camouflage indexes: the anti-wave band is 3-5 μm, 8-14 μm, the average radiation temperature difference absolute value (heat source working state) between the camouflage surface and the background: at most 4 ℃.

Radar stealth index: the reflection attenuation of L, S wave band is not less than 5dB, the reflection attenuation of C, X, Ku and Ka wave band is not less than 8dB, and the reflection attenuation of millimeter wave band is not less than 10 dB.

Example 4

Comprises a base cloth layer 3 consisting of mixed fibers, conductive and magnetic fibers 2 which are woven in an oriented way, and non-conductive fibers 3.

The preparation method of the material comprises the following steps:

s1: base cloth knitting

As shown in fig. 2, 1200D silver-plated aramid fiber and 2400D aramid fiber are woven according to the warp-weft ratio of 3:1 to form the mesh fabric shown in the figure, and the thickness of the fabric is about 0.8-1 mm.

S2: directional fabric weaving

The 1200D silver-plated aramid fiber cloth and the 2400D aramid fiber are directionally woven on the surface of the base cloth finished in the S1 mode according to the structures shown in the figures 1 and 2, the arrangement interval is 2mm, and the length of the directional fabric is 15-20 mm.

S3: infrared camouflage coating material spraying

And spraying the prepared infrared camouflage coating material on the surface of the finished product of S2 by using a high-pressure spraying machine, and drying and curing.

Specifically, the method comprises the following steps: preparing an infrared camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 10 parts of indium oxide, 30 parts of zinc oxide micro powder, 100 parts of waterborne epoxy curing agent and 80 parts of distilled water according to a designed proportion, and adding into a stirring barrel to be uniformly stirred for later use.

The infrared camouflage coating material can meet the infrared camouflage spectrum requirement.

S4: visible light camouflage coating material spraying

And spraying the prepared visible light camouflage coating material on the surface of the finished product of S3 by using a high-pressure sprayer, and drying and curing.

Specifically, the method comprises the following steps: preparing a camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 20 parts of green pigment, 1 part of yellow pigment, 100 parts of waterborne epoxy curing agent and 50 parts of distilled water according to a designed proportion, and adding the mixture into a stirring barrel to be uniformly stirred for later use.

The camouflage coating material configured above can meet the requirements of visible light camouflage.

Curing, drying, processing and cutting: and S4 drying the sprayed fiber fabric at room temperature for 48 hours, and cutting according to the required size to obtain the bionic flexible camouflage composite material.

And (3) testing: the bionic flexible camouflage composite material visible light, infrared and radar wave camouflage performance is tested by referring to GJB 4797A-2015 ground missile array camouflage requirement, and the following technical parameters are obtained:

visible light camouflage index: the wavelength range of the countermeasure is 0.3-2.5 μm, and the color difference of the dominant color of the target and the typical background is as follows: less than or equal to 1 color difference unit; average brightness contrast value of target false mounting surface and background visible light: less than or equal to 0.15; contrast ratio of brightness between patches of colors of the camouflage spots: not less than 0.3.

Infrared camouflage indexes: the anti-wave band is 3-5 μm, 8-14 μm, the average radiation temperature difference absolute value (heat source working state) between the camouflage surface and the background: is less than or equal to 3 ℃.

Radar stealth index: the reflection attenuation of L, S wave band is not less than 3dB, the reflection attenuation of C, X, Ku and Ka wave bands is not less than 12dB, and the reflection attenuation of millimeter wave band is not less than 10 dB.

Example 5

Comprises a base cloth layer 3 consisting of mixed fibers, conductive and magnetic fibers 2 which are woven in an oriented way, and non-conductive fibers 3.

The preparation method of the material comprises the following steps:

s1: base cloth knitting

As shown in figure 2, 6k nickel-plated carbon fiber and 4800Tex glass fiber are woven according to the warp-weft ratio of 5:1 to form the mesh fabric with the thickness of about 1-2 mm.

S2: directional fabric weaving

And (3) directionally weaving 6k nickel-plated carbon fibers and nylon thin strips with the width of 2mm and the thickness of 0.01mm on the surface of the base cloth finished in the step S1 according to the structures shown in the figures 1 and 2, wherein the arrangement interval is 15mm, and the length of the directional fabric is 40-50 mm.

S3: infrared camouflage coating material spraying

And spraying the prepared infrared camouflage coating material on the surface of the finished product of S2 by using a high-pressure spraying machine, and drying and curing.

Specifically, the method comprises the following steps: preparing an infrared camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 35 parts of vanadium dioxide micropowder, 100 parts of waterborne epoxy curing agent and 100 parts of distilled water according to a designed proportion, and adding into a stirring barrel to be uniformly stirred for later use.

The infrared camouflage coating material can meet the infrared camouflage spectrum requirement.

S4: visible light camouflage coating material spraying

And spraying the prepared visible light camouflage coating material on the surface of the finished product of S3 by using a high-pressure sprayer, and drying and curing.

Specifically, the method comprises the following steps: preparing a camouflage coating material, sequentially adding 100 parts of waterborne epoxy resin, 20 parts of green pigment, 0.5 part of red pigment, 100 parts of waterborne epoxy curing agent and 50 parts of distilled water according to a designed proportion, and adding into a stirring barrel to be uniformly stirred for later use.

The camouflage coating material configured above can meet the requirements of visible light camouflage.

Curing, drying, processing and cutting: and S4 drying the sprayed fiber fabric at room temperature for 48 hours, and cutting according to the required size to obtain the bionic flexible camouflage composite material.

And (3) testing: the bionic flexible camouflage composite material visible light, infrared and radar wave camouflage performance is tested by referring to GJB 4797A-2015 ground missile array camouflage requirement, and the following technical parameters are obtained:

visible light camouflage index: the wavelength range of the countermeasure is 0.3-2.5 μm, and the color difference of the dominant color of the target and the typical background is as follows: less than or equal to 2 color difference units; average brightness contrast value of target false mounting surface and background visible light: less than or equal to 0.10; contrast ratio of brightness between patches of colors of the camouflage spots: not less than 0.3.

Infrared camouflage indexes: the anti-wave band is 3-5 μm, 8-14 μm, the average radiation temperature difference absolute value (heat source working state) between the camouflage surface and the background: at most 4 ℃.

Radar stealth index: the reflection attenuation of L, S wave band is not less than 6dB, the reflection attenuation of C, X, Ku and Ka wave band is not less than 8dB, and the reflection attenuation of millimeter wave band is not less than 10 dB.

The composite material is woven by fibers with different dielectric properties, and the fabric has a plant bionic structure and realizes the radar wave scattering effect; infrared and visible light stealth coatings are sprayed on the surface of the material to realize multi-band camouflage. The flexible camouflage material is simple in weaving process and high in reliability, and is combined with a camouflage coating sprayed with infrared light and visible light on the surface to realize the camouflage material based on the hybrid fiber fabric form.

Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.