A compatible ultraviolet-visible-near infrared wide band hyperspectral snow ground simulation fabric and a preparation method thereof

Abstract

The application discloses a wide-band hyperspectral snowfield camouflage fabric compatible with ultraviolet-visible light-near infrared, characterized in that the fabric comprises a high ultraviolet reflection coating and a 3D spacing fabric layer impregnated with a hygroscopic coating, raw materials of the high ultraviolet reflection coating comprise polyvinyl alcohol and inorganic white powder pigment, and the hygroscopic coating comprises a high molecular coating and a water-absorbable metal salt layer. The application further discloses a preparation method of the wide-band hyperspectral snowfield camouflage fabric compatible with ultraviolet-visible light-near infrared and specific application of the fabric. The application takes the 3D spacing fabric as a base material, first makes the hygroscopic coating on the surface of the base material, and then makes the high ultraviolet reflection coating on one side or both sides of the fabric, so that the prepared spectral simulation fabric not only has high ultraviolet reflectivity, but also simulates obvious "water absorption valleys (water peaks)" at 1450 nm and 1930 nm, and can better meet the snowfield camouflage in a wide-band range.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of textile dyeing and finishing, and particularly relates to a compatible ultraviolet-visible-near-infrared wide-band hyperspectral snowfield simulation fabric and a preparation method thereof. BACKGROUND

[0002] Snowfield has a unique environment. Through analysis of the existing snowfield spectrum, it can be found that the snowfield has three quite obvious spectral characteristics in the 350-2500 nm reflectance spectrum, that is, the reflectance at 350 nm should be greater than 70%; the average reflectance in the 380-760 nm visible light band should be above 75%; and the reflectance in the near-infrared band decreases rapidly and forms two absorption valleys at 1450 nm and 1930 nm, which are called "water absorption valleys". Therefore, to achieve good camouflage effect in the snowfield, not only is the camouflage material required to be white in the visible light region, but also the reflectance of the camouflage material to ultraviolet light should be above 70%, and at the same time, the camouflage material should have similar water absorption valleys in the near-infrared band, so as to present similar color effect to the snowfield background in the ultraviolet filter and can cope with the detection in a longer wave band range, so as to achieve the purpose of snowfield camouflage.

[0003] Domestic and foreign researches on snowfield camouflage materials for ultraviolet detection equipment have been carried out for a long time. For example, a camouflage coating is prepared by using sulfate, carbonate and oxides of barium, calcium and magnesium; a camouflage fiber is prepared by adding ZrO2 and TiO2 to a spinning solution; a composite material camouflage net is prepared by using TiO2, magnesium titanate, silicate or a mixture of SiO2 as a filler; and researches on white ultraviolet fluorescent dyes are also carried out. However, these camouflage materials are mostly used for the camouflage of military equipment such as vehicles and guns, and are not suitable for individual combat. Some patents have studied the light reflection performance of various white inorganic particles, and pointed out that the particles of titanium dioxide, antimony trioxide, zinc oxide and zinc sulfide have high reflectivity in the visible light band, but low reflectivity in the near-ultraviolet region, and do not have good snowfield camouflage performance.

[0004] At present, the materials with high ultraviolet reflection applied in snow camouflage paint are inorganic white powder pigments such as barium sulfate, silicon dioxide, aluminum oxide and magnesium oxide. Although these materials can complete the work of reflecting ultraviolet light, the existing snow camouflage paint on the market is generally mainly used for reflecting ultraviolet light with a wavelength of 300-400 nm, and the average reflectivity is generally 60-65%. In addition, the coating performance of the paint is poor, and the combination performance with the fabric is poor, which leads to that the ultraviolet reflectivity of the existing snow camouflage paint cannot even reach 60-65% in actual use. In order to solve the problem of low ultraviolet reflectivity of traditional snow camouflage equipment, Chinese invention patent CN201410217720.3 discloses a white printing paste, a preparation method and use thereof. Snow camouflage fabric is prepared by using silicon dioxide and magnesium oxide as pigments, water-based resin as adhesive, and adopting printing process. Although the whiteness (visible light) and ultraviolet reflectivity of the snow camouflage fabric prepared by the method can meet the requirements of simulating snow background, the camouflage performance in the thermal infrared band is not involved, and the research is only for individual combat snow camouflage and protective textile materials, and does not involve equipment camouflage.

[0005] In addition, the existing related researches such as patents CN115895425A and CN117385652A mainly focus on the short wave band of 380-1100 nm, and it is difficult to cope with the high-spectrum detection technology of a wider wave band. Therefore, the combination of high ultraviolet reflection characteristics in the ultraviolet light region and simulation of "water absorption valley" has become the research focus for coping with high-spectrum detection technology. SUMMARY

[0006] In view of the above problems, the purpose of the present application is to provide a compatible ultraviolet-visible light-near infrared wide wave band high-spectrum snow simulation fabric and a preparation method thereof, so as to obtain a snow simulation fabric with an ultraviolet reflectivity of more than 80% and capable of realizing detection in a wide wave band range of 350-2500 nm, so as to solve the problems of low ultraviolet reflectivity and difficulty in realizing wide wave band detection existing in the existing snow simulation fabric.

[0007] In order to solve the above problems, the present application provides a compatible ultraviolet-visible light-near infrared wide wave band high-spectrum snow camouflage fabric and a preparation method thereof. Low solar absorption rate and high infrared emissivity materials are used as film-forming substances of the paint, and high ultraviolet reflectivity inorganic white powder pigments are added. The paint is coated on the surface layer of 3D spacer fabric of different fabrics such as pure cotton, polyester, nylon, polyester-cotton blended fabric, etc., so as to give good ultraviolet reflection effect and excellent coating performance. The polymer generated by the crosslinking reaction of sodium alginate and calcium chloride solution at a certain temperature fixes the moisture in the air, realizes "water peak" simulation, and enables the finally prepared fabric to realize wide wave band snow camouflage.

[0008] The application provides a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible light-near infrared, which comprises a high ultraviolet reflection coating and a 3D spacer fabric layer impregnated with a moisture absorption coating, raw materials of the high ultraviolet reflection coating comprise polyvinyl alcohol and inorganic white powder pigment, and the moisture absorption coating comprises a polymer coating and a water-absorbable metal salt layer; wherein the inorganic white powder pigment comprises one or more of nano magnesium oxide, nano aluminum oxide, nano silicon dioxide and barium sulfate, raw materials of the polymer coating comprise one or more of sodium alginate, sodium polyacrylate, phosphated dextran sodium, carboxymethylated cellulose, carboxymethylated sodium alginate, chitosan and polyvinyl alcohol, and the water-absorbable metal salt comprises one or more of chlorides, sulfates and carbonates of calcium ions, zinc ions and aluminum ions.

[0009] In an embodiment of the application, the fabric comprises the high ultraviolet reflection coating, the 3D spacer fabric layer impregnated with the moisture absorption coating and the high ultraviolet reflection coating.

[0010] In an embodiment of the application, the fabric of the 3D spacer fabric comprises pure cotton, polyester, nylon and polyester-cotton blended fabric.

[0011] In an embodiment of the application, the high ultraviolet reflection coating is prepared by mixing polyvinyl alcohol aqueous solution and inorganic white powder pigment to prepare high ultraviolet reflection paint, and then coating the high ultraviolet reflection paint on the surface of the 3D spacer fabric.

[0012] In an embodiment of the application, the mass fraction of the polyvinyl alcohol aqueous solution is 1-5%.

[0013] In an embodiment of the application, the number average molecular weight of the polyvinyl alcohol is 50000-150000.

[0014] In an embodiment of the application, the coating method comprises at least one of spraying, calendering and roller coating.

[0015] In an embodiment of the application, the thickness of the high ultraviolet reflection coating is 0.01-5 nm.

[0016] In an embodiment of the application, in the high ultraviolet reflection paint, the particle size of the nano magnesium oxide is 20-50 nm, the particle size of the nano aluminum oxide is 10-50 nm, the particle size of the nano silicon dioxide is 10-50 nm, and the particle size of the barium sulfate is 200-500 nm.

[0017] In an embodiment of the application, in the high ultraviolet reflection paint, the mass ratio of the inorganic white powder pigment to the polyvinyl alcohol aqueous solution is 1:25-1:1.

[0018] In one embodiment of the present application, the polyvinyl alcohol aqueous solution is prepared by pouring polyvinyl alcohol into water at a temperature of 60-90°C, keeping the temperature, and fully stirring to dissolve the polyvinyl alcohol uniformly, and then cooling to 30°C.

[0019] In one embodiment of the present application, the moisture-absorbing coating is prepared by first immersing the 3D spacer fabric in a high-molecular coating aqueous solution to form a high-molecular coating, drying, and then immersing in a water-absorbable metal salt aqueous solution to perform cross-linking reaction.

[0020] In one embodiment of the present application, the mass fraction of the high-molecular coating in the high-molecular coating aqueous solution is 5-30%.

[0021] In one embodiment of the present application, the thickness of the high-molecular coating is 0.01-5 nm.

[0022] In one embodiment of the present application, the mass fraction of the water-absorbable metal salt in the water-absorbable metal salt aqueous solution is 10-50%.

[0023] In one embodiment of the present application, the thickness of the water-absorbable metal salt layer is 0.01-5 nm.

[0024] The present application also discloses a preparation method of the above-mentioned snow camouflage fabric compatible with ultraviolet-visible light-near infrared wide-band hyperspectral, comprising the following steps:

[0025] (1) Preparation of high-ultraviolet reflective coating: adding inorganic white powder pigment into polyvinyl alcohol aqueous solution, and stirring uniformly to prepare high-ultraviolet reflective coating;

[0026] (2) Preparation of moisture-absorbing coating reaction solution: respectively preparing high-molecular coating aqueous solution with a mass fraction of 5-30% and water-absorbable metal salt aqueous solution with a mass fraction of 10-50%;

[0027] (3) Preparation of water-absorbable transparent coating: immersing 3D spacer fabric in high-molecular coating aqueous solution first, immersing for 30-60 min, and then drying in a 60°C oven; then immersing the fabric containing high-molecular coating in water-absorbable metal salt aqueous solution, cross-linking for 30-60 min at 20-30°C, and then drying;

[0028] (4) Preparation of high-ultraviolet reflective coating: applying high-ultraviolet reflective coating on the surface of the moisture-absorbing coating, and performing constant humidity treatment to obtain snow camouflage fabric.

[0029] In one embodiment of the present application, the high-molecular coating is sodium alginate, and the water-absorbable metal salt is calcium chloride.

[0030] In one embodiment of the present application, in step (4), the constant humidity treatment is to equilibrate the fabric coated with the high ultraviolet reflective paint under 60-90% humidity for 2-5 hours.

[0031] The present application also provides an application of the above-mentioned snow camouflage fabric in the field of snow camouflage.

[0032] In one embodiment of the present application, the application includes the preparation of camouflage for military machinery, camouflage net in individual combat, combat uniform, tank armor, information shelter and shelter.

[0033] Advantages and effects of the present application:

[0034] (1) The present application uses 3D spacer fabric as a base material, first makes a moisture absorption coating on the surface thereof, and then makes a high ultraviolet reflective coating on one side or both sides of the fabric, so that the prepared spectral simulation fabric not only has high ultraviolet reflectivity, but also simulates obvious "water absorption valley (water peak)" at 1450 nm and 1930 nm, and can better meet the snow camouflage in a wide waveband range.

[0035] (2) The present application selects inorganic white powder pigments such as nano magnesium oxide, nano aluminum oxide, nano silicon dioxide and barium sulfate as the reflective material of the high ultraviolet reflective coating, and combines with polyvinyl alcohol to prepare the high ultraviolet reflective coating, and the preparation of the high ultraviolet reflective coating significantly improves the ultraviolet reflectivity of the fabric, wherein the ultraviolet reflectivity of the preferred formula can be more than 80%; and the high ultraviolet reflective paint of the present application has better tackiness, which is better than the commercially available paint.

[0036] (3) The present application selects high molecular materials such as sodium alginate as the base material of the high molecular coating, and after the cross-linking reaction of the high molecular coating and the water-absorbing metal salt, the fabric shows good near-infrared detection characteristics, i.e. obvious "water peak" at 1450 nm and 1930 nm, which can cope with the detection in the waveband range of 350-2500 nm.

[0037] (4) The 3D spacer fabric of the present application can appropriately separate the "ultraviolet reflective layer" of the high reflective coating and the "water peak simulation layer" of the moisture absorption coating, reduce the mutual influence of the two, and make them work together, so as to simulate the wide waveband snow spectrum curve covering ultraviolet-visible light-near infrared.

[0038] (5) The wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible light-near infrared can achieve ultraviolet reflectivity of more than 80% in the ultraviolet region, and can simulate the "water peak" at 1450 nm and 1930 nm to cope with the detection in the 350-2500 nm band range. The finally obtained camouflage fabric can be widely applied to various types of camouflage in snow background, not only suitable for the camouflage of military instruments such as vehicles and guns, but also suitable for the camouflage net, combat uniform, tank armor, information shelter and shelter camouflage in individual combat. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a processing flow diagram of the wide-band hyperspectral snow camouflage fabric of the embodiment of the present application.

[0040] Figure 2 It is a fabric structure diagram of the wide-band hyperspectral snow camouflage fabric of the embodiment of the present application.

[0041] Figure 3 It is a spectral reflectivity test diagram of the wide-band hyperspectral snow camouflage fabric of the embodiment 1 of the present application.

[0042] Figure 4 It is a spectral reflectivity test diagram of the high ultraviolet reflection fabric of the control example 1 of the present application.

[0043] Figure 5 It is a spectral reflectivity test diagram of the spectral simulation fabric of the control example 2 of the present application.

[0044] Figure 6 It is a spectral reflectivity test diagram of the spectral simulation fabric of the control examples 3-6 of the present application. DETAILED DESCRIPTION

[0045] The technical solutions of the application will be described in detail below with reference to the drawings:

[0046] The effect test method of the fabric obtained in the present application: the spectral reflectivity curve of the fabric is determined by using the ultraviolet-visible light-near infrared spectrophotometer (Lambda 950) of the American Perkin Elmer company and adopting Vis-NIR reflection spectrum test.

[0047] Example 1

[0048] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible light-near infrared, comprising a high ultraviolet reflection coating and a polyester 3D spacer fabric layer impregnated with a hygroscopic coating, the high ultraviolet reflection coating comprises polyvinyl alcohol and nano magnesium oxide, and the hygroscopic coating comprises the crosslinked product of sodium alginate and calcium chloride.

[0049] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible light-near infrared, comprising the following steps:

[0050] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 50000 was added to 990 g of water at a temperature of 60℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred. The temperature was then lowered to 30℃, 200 g of nano-magnesium oxide was added, and the mixture was stirred until it was uniform. A high ultraviolet reflective coating was prepared and was ready for use.

[0051] Step 2: A 5% by mass sodium alginate solution and a 10% by mass calcium chloride solution were prepared and were ready for use.

[0052] Step 3: The polyester 3D spacer fabric was cut to a size of 10 cm x 10 cm, and was fully immersed in the sodium alginate solution of Step 2 for 30 min. After being dried in an oven at 60℃, the fabric was immersed in the calcium chloride solution of Step 2, and was crosslinked at room temperature for 30 min.

[0053] Step 4: After being dried, the high ultraviolet reflective coating of Step 1 was applied to one side of the fabric.

[0054] Step 5: The resulting fabric was equilibrated at a humidity of 60% for 2 h, and a wide-band high-spectrum snow camouflage fabric was obtained.

[0055] Example 2

[0056] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a cotton 3D spacer fabric layer impregnated with a moisture-absorbing coating. The high ultraviolet reflective coating includes polyvinyl alcohol and nano-aluminum oxide, and the moisture-absorbing coating includes a crosslinked product of sodium alginate and calcium chloride.

[0057] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0058] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred. The temperature was then lowered to 30℃, 100 g of nano-aluminum oxide was added, and the mixture was stirred until it was uniform. A high ultraviolet reflective coating was prepared and was ready for use.

[0059] Step 2: A 20% by mass sodium alginate solution and a 20% by mass calcium chloride solution were prepared and were ready for use.

[0060] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, and was fully immersed in the sodium alginate solution of Step 2 for 40 min. After being dried in an oven at 60℃, the fabric was immersed in the calcium chloride solution of Step 2, and was crosslinked at room temperature for 40 min.

[0061] Step 4: After being dried, the high ultraviolet reflective coating of Step 1 was applied to one side of the fabric.

[0062] Step 5: The obtained fabric is balanced under 70% humidity conditions for 3h to obtain a wide-band hyperspectral snow camouflage fabric.

[0063] Example 3

[0064] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating and a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating comprising polyvinyl alcohol and nano-silicon dioxide, and the moisture absorption coating comprising a crosslinked product of sodium alginate and calcium chloride.

[0065] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0066] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 90000 is added to 990g of water at a temperature of 80℃, and the temperature is kept constant, and the polyvinyl alcohol is fully stirred and dissolved uniformly, and then the temperature is lowered to 30℃, 150g of nano-silicon dioxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0067] Step 2: Prepare a 30% mass fraction sodium alginate solution and a 30% mass fraction calcium chloride solution for standby;

[0068] Step 3: Cut the polyester-cotton blended 3D spacer fabric to a size of 10cm x 10cm, and fully soak it in the sodium alginate solution of step 2 for 50min, and then dry it in a 60℃ oven, and then soak it in the calcium chloride solution of step 2 for crosslinking at room temperature for 50min;

[0069] Step 4: After drying, coat the high ultraviolet reflective coating of step 1 on one side of the fabric;

[0070] Step 5: The obtained fabric is balanced under 80% humidity conditions for 4h to obtain a wide-band hyperspectral snow camouflage fabric.

[0071] Example 4

[0072] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating and a nylon 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating comprising polyvinyl alcohol and barium sulfate, and the moisture absorption coating comprising a crosslinked product of sodium alginate and calcium chloride.

[0073] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0074] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 110000 was added to 990 g of water at a temperature of 60℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 300 g of barium sulfate was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0075] Step 2: A 5% by mass sodium alginate solution and a 20% by mass calcium chloride solution were prepared for use;

[0076] Step 3: The nylon 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the sodium alginate solution of step 2 for 60 min, dried in a 60℃ oven, and then immersed in the calcium chloride solution of step 2 for crosslinking at room temperature for 60 min;

[0077] Step 4: After drying, the high ultraviolet reflective coating of step 1 was applied to one side of the fabric surface;

[0078] Step 5: The resulting fabric was equilibrated under 90% humidity conditions for 5 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0079] Example 5

[0080] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a polyester 3D spacer fabric layer impregnated with a moisture-absorbing coating, and a high ultraviolet reflective coating. The high ultraviolet reflective coating includes polyvinyl alcohol and nano-magnesium oxide, and the moisture-absorbing coating includes a crosslinked product of sodium alginate and calcium chloride.

[0081] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0082] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 50000 was added to 990 g of water at a temperature of 60℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 200 g of nano-magnesium oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0083] Step 2: A 5% by mass sodium alginate solution and a 10% by mass calcium chloride solution were prepared for use;

[0084] Step 3: The polyester 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the sodium alginate solution of step 2 for 30 min, dried in a 60℃ oven, and then immersed in the calcium chloride solution of step 2 for crosslinking at room temperature for 30 min;

[0085] Step 4: After drying, the high ultraviolet reflective coating of step 1 was applied to both sides of the fabric;

[0086] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0087] Example 6

[0088] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating, a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating comprising polyvinyl alcohol and nano-aluminum oxide, and the moisture absorption coating comprising a crosslinked product of sodium alginate and calcium chloride.

[0089] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0090] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 70000 is added to 990g of water at a temperature of 70℃, and the temperature is kept constant, and the polyvinyl alcohol is fully dissolved and uniformly stirred, and then the temperature is lowered to 30℃, and 100g of nano-aluminum oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0091] Step 2: A 20% sodium alginate solution and a 20% calcium chloride solution are prepared for standby;

[0092] Step 3: The cotton 3D spacer fabric is cut to a size of 10cm x 10cm, and is fully impregnated in the sodium alginate solution of step 2 for 40min, and is dried in a 60℃ oven, and then is soaked in the calcium chloride solution of step 2 for crosslinking at room temperature for 40min;

[0093] Step 4: After drying, the high ultraviolet reflective coating of step 1 is coated on both sides of the fabric;

[0094] Step 5: The obtained fabric is balanced under 70% humidity for 3h to obtain the wide-band hyperspectral snow camouflage fabric.

[0095] Example 7

[0096] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating, a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating comprising polyvinyl alcohol and nano-silicon dioxide, and the moisture absorption coating comprising a crosslinked product of sodium alginate and calcium chloride.

[0097] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0098] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 90000 was added to 990 g of water at a temperature of 80℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 150 g of nano-silicon dioxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0099] Step 2: A 30% by mass sodium alginate solution and a 30% by mass calcium chloride solution were prepared for use;

[0100] Step 3: The polyester-cotton blended 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the sodium alginate solution of Step 2 for 50 min, dried in an oven at 60℃, and then immersed in the calcium chloride solution of Step 1 for crosslinking at room temperature for 50 min;

[0101] Step 4: After drying, the high ultraviolet reflective coating of Step 1 was applied to both sides of the fabric;

[0102] Step 5: The resulting fabric was equilibrated at 80% humidity for 4 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0103] Example 8

[0104] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a nylon 3D spacer fabric layer impregnated with a moisture-absorbing coating, and a high ultraviolet reflective coating. The high ultraviolet reflective coating includes polyvinyl alcohol and nano-barium sulfate, and the moisture-absorbing coating includes a crosslinked product of sodium alginate and calcium chloride.

[0105] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0106] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 110000 was added to 990 g of water at a temperature of 60℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 300 g of barium sulfate was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0107] Step 2: A 5% by mass sodium alginate solution and a 20% by mass calcium chloride solution were prepared for use;

[0108] Step 3: The nylon 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the sodium alginate solution of Step 2 for 60 min, dried in an oven at 60℃, and then immersed in the calcium chloride solution of Step 2 for crosslinking at room temperature for 60 min;

[0109] Step 4: After drying, the high ultraviolet reflective coating of Step 1 was applied to both sides of the fabric;

[0110] Step 5: The obtained fabric is balanced under 90% humidity for 5h to obtain the wide-band hyperspectral snow camouflage fabric.

[0111] Example 9

[0112] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating and a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating comprising polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating comprising a crosslinked product of sodium polyacrylate and calcium chloride.

[0113] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0114] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the polyvinyl alcohol is fully dissolved and uniformly mixed by stirring, and then the temperature is lowered to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0115] Step 2: A 5% by mass sodium polyacrylate solution and a 10% by mass calcium chloride solution are prepared for standby;

[0116] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm x 10cm, and is fully impregnated in the sodium polyacrylate solution of step 2 for 30min, and then is dried in a 60℃ oven, and then is soaked in the calcium chloride solution of step 2 for crosslinking at room temperature for 30min;

[0117] Step 4: The high ultraviolet reflective coating of step 1 is coated on one side of the fabric after drying;

[0118] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0119] Example 10

[0120] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating and a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating comprising polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating comprising a crosslinked product of sodium polyacrylate and calcium sulfate.

[0121] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0122] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0123] Step 2: A 20% by mass sodium polyacrylate solution and a 20% by mass calcium sulfate solution were prepared for use;

[0124] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the sodium polyacrylate solution of Step 2 for 40 min, dried in an oven at 60℃, and then immersed in the calcium sulfate solution of Step 2 for crosslinking at room temperature for 40 min;

[0125] Step 4: After drying, the high ultraviolet reflective coating of Step 1 was applied to one side of the fabric;

[0126] Step 5: The resulting fabric was equilibrated at 70% humidity for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0127] Example 11

[0128] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a crosslinked product of sodium polyacrylate and calcium nitrate.

[0129] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0130] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0131] Step 2: A 20% by mass sodium polyacrylate solution and a 20% by mass calcium sulfate solution were prepared for use;

[0132] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the sodium polyacrylate solution of Step 2 for 40 min, dried in an oven at 60℃, and then immersed in the calcium sulfate solution of Step 2 for crosslinking at room temperature for 40 min;

[0133] Step 4: After drying, the high ultraviolet reflective coating of Step 1 was applied to one side of the fabric;

[0134] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0135] Example 12

[0136] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating includes a crosslinked product of sodium polyacrylate and calcium chloride.

[0137] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0138] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the polyvinyl alcohol is fully dissolved and uniformly mixed by stirring, and then the temperature is lowered to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0139] Step 2: A 5% by mass sodium polyacrylate solution and a 10% by mass calcium chloride solution are prepared for standby;

[0140] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm x 10cm, and is fully impregnated in the sodium polyacrylate solution for 30min, and then is dried in a 60℃ oven, and then is soaked in the calcium chloride solution at room temperature for crosslinking for 30min;

[0141] Step 4: The high ultraviolet reflective coating is applied to both sides of the fabric after drying;

[0142] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0143] Example 13

[0144] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating includes a crosslinked product of sodium polyacrylate and calcium sulfate.

[0145] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0146] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0147] Step 2: A 20% by mass polyacrylic acid sodium solution and a 20% by mass calcium sulfate solution were prepared for use;

[0148] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the polyacrylic acid sodium solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for crosslinking for 40 min;

[0149] Step 4: After drying, the high ultraviolet reflective coating was applied to both sides of the fabric;

[0150] Step 5: The resulting fabric was equilibrated at 70% humidity for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0151] Example 14

[0152] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, and a high ultraviolet reflective coating. The high ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a crosslinked product of polyacrylic acid sodium and calcium nitrate.

[0153] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0154] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0155] Step 2: A 20% by mass polyacrylic acid sodium solution and a 20% by mass calcium sulfate solution were prepared for use;

[0156] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the polyacrylic acid sodium solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for crosslinking for 40 min;

[0157] Step 4: After drying, the high ultraviolet reflective coating was applied to both sides of the fabric;

[0158] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0159] Example 15

[0160] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating includes a crosslinked product of phosphated sodium dextran and calcium chloride.

[0161] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0162] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the polyvinyl alcohol is fully dissolved and uniformly stirred, and then cooled to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0163] Step 2: A 5% mass fraction phosphated sodium dextran solution and a 10% mass fraction calcium chloride solution are prepared for standby;

[0164] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm x 10cm, and is fully impregnated in the phosphated sodium dextran solution for 30min, and then dried in a 60℃ oven, and then soaked in the calcium chloride solution at room temperature for crosslinking for 30min;

[0165] Step 4: The high ultraviolet reflective coating is coated on one side of the fabric after drying;

[0166] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0167] Example 16

[0168] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating includes a crosslinked product of phosphated sodium dextran and calcium sulfate.

[0169] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0170] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0171] Step 2: A 20% by mass phosphated dextran sodium solution and a 20% by mass calcium sulfate solution were prepared for use;

[0172] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the phosphated dextran sodium solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for crosslinking for 40 min;

[0173] Step 4: After drying, the high ultraviolet reflective coating was applied to one side of the fabric;

[0174] Step 5: The resulting fabric was equilibrated at 70% humidity for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0175] Example 17

[0176] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a crosslinked product of phosphated dextran sodium and calcium nitrate.

[0177] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0178] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0179] Step 2: A 20% by mass phosphated dextran sodium solution and a 20% by mass calcium sulfate solution were prepared for use;

[0180] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the phosphated dextran sodium solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for crosslinking for 40 min;

[0181] Step 4: After drying, the high ultraviolet reflective coating was applied to one side of the fabric;

[0182] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0183] Example 18

[0184] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating, a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, wherein the high ultraviolet reflective coating comprises polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating comprises a crosslinked product of sodium phosphatedextran and calcium chloride.

[0185] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0186] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the mixture is kept warm and stirred well until the polyvinyl alcohol is fully dissolved and uniform. Then the temperature is lowered to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for later use;

[0187] Step 2: A 5% mass fraction sodium phosphatedextran solution and a 10% mass fraction calcium chloride solution are prepared for later use;

[0188] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm x 10cm, and then fully immersed in the sodium phosphatedextran solution for 30min. After drying in a 60℃ oven, the fabric is immersed in the calcium chloride solution at room temperature for crosslinking for 30min;

[0189] Step 4: After drying, the high ultraviolet reflective coating is applied to both sides of the fabric;

[0190] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0191] Example 19

[0192] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising a high ultraviolet reflective coating, a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, wherein the high ultraviolet reflective coating comprises polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating comprises a crosslinked product of sodium phosphatedextran and calcium sulfate.

[0193] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared, comprising the following steps:

[0194] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0195] Step 2: A 20% by mass phosphated dextran sodium solution and a 20% by mass calcium sulfate solution were prepared for use;

[0196] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the phosphated dextran sodium solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for crosslinking for 40 min;

[0197] Step 4: After drying, the high ultraviolet reflective coating was applied to both sides of the fabric;

[0198] Step 5: The resulting fabric was equilibrated at 70% humidity for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0199] Example 20

[0200] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, and a high ultraviolet reflective coating. The high ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a crosslinked product of phosphated dextran sodium and calcium nitrate.

[0201] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0202] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0203] Step 2: A 20% by mass phosphated dextran sodium solution and a 20% by mass calcium sulfate solution were prepared for use;

[0204] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the phosphated dextran sodium solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for crosslinking for 40 min;

[0205] Step 4: After drying, the high ultraviolet reflective coating was applied to both sides of the fabric;

[0206] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0207] Example 21

[0208] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating includes a crosslinked product of polymethacrylic acid and calcium chloride.

[0209] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0210] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the polyvinyl alcohol is fully dissolved and uniformly stirred, and then cooled to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0211] Step 2: A 5% mass fraction polymethacrylic acid solution and a 10% mass fraction calcium chloride solution are prepared for standby;

[0212] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm x 10cm, and is fully impregnated in the polymethacrylic acid solution for 30min, and then dried in a 60℃ oven, and then soaked in the calcium chloride solution at room temperature for crosslinking for 30min;

[0213] Step 4: The high ultraviolet reflective coating is applied to one side of the fabric after drying;

[0214] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0215] Example 22

[0216] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating includes a crosslinked product of polymethacrylic acid and calcium sulfate.

[0217] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0218] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0219] Step 2: A 20% by mass poly-methyl-acrylic acid solution and a 20% by mass calcium sulfate solution were prepared for use;

[0220] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the poly-methyl-acrylic acid solution for 40 min, dried in a 60℃ oven, then immersed in the calcium sulfate solution for cross-linking at room temperature for 40 min;

[0221] Step 4: After drying, the high ultraviolet reflective coating was applied to one side of the fabric;

[0222] Step 5: The obtained fabric was equilibrated at a humidity of 70% for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0223] Example 23

[0224] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a cross-linked product of poly-methyl-acrylic acid and calcium nitrate.

[0225] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0226] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0227] Step 2: A 20% by mass poly-methyl-acrylic acid solution and a 20% by mass calcium sulfate solution were prepared for use;

[0228] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the poly-methyl-acrylic acid solution for 40 min, dried in a 60℃ oven, then immersed in the calcium sulfate solution for cross-linking at room temperature for 40 min;

[0229] Step 4: After drying, the high ultraviolet reflective coating was applied to one side of the fabric;

[0230] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0231] Example 24

[0232] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating includes a crosslinked product of polymethacrylic acid and calcium chloride.

[0233] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0234] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the polyvinyl alcohol is fully dissolved and uniformly mixed by stirring, and then the temperature is lowered to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0235] Step 2: A 5% mass fraction polymethacrylic acid solution and a 10% mass fraction calcium chloride solution are prepared for standby;

[0236] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm x 10cm, and is fully impregnated in the polymethacrylic acid solution for 30min, and then is dried in a 60℃ oven, and then is soaked in the calcium chloride solution at room temperature for crosslinking for 30min;

[0237] Step 4: The high ultraviolet reflective coating is applied to both sides of the fabric after drying;

[0238] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0239] Example 25

[0240] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating includes a crosslinked product of polymethacrylic acid and calcium sulfate.

[0241] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0242] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for standby use;

[0243] Step 2: A 20% by mass poly-methyl-acrylic acid solution and a 20% by mass calcium sulfate solution were prepared for standby use;

[0244] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the poly-methyl-acrylic acid solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for cross-linking for 40 min;

[0245] Step 4: After drying, the high ultraviolet reflective coating was applied to both sides of the fabric;

[0246] Step 5: The obtained fabric was equilibrated under a humidity of 70% for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0247] Example 26

[0248] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, and a high ultraviolet reflective coating. The high ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a cross-linked product of poly-methyl-acrylic acid and calcium nitrate.

[0249] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0250] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for standby use;

[0251] Step 2: A 20% by mass poly-methyl-acrylic acid solution and a 20% by mass calcium sulfate solution were prepared for standby use;

[0252] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the poly-methyl-acrylic acid solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution at room temperature for cross-linking for 40 min;

[0253] Step 4: After drying, the high ultraviolet reflective coating was applied to both sides of the fabric;

[0254] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0255] Example 27

[0256] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating includes a crosslinked product of carboxymethyl cellulose and calcium chloride.

[0257] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0258] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the polyvinyl alcohol is fully dissolved and uniformly stirred, and then cooled to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0259] Step 2: A carboxymethyl cellulose solution with a mass fraction of 5% and a calcium chloride solution with a mass fraction of 10% are prepared for standby;

[0260] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm×10cm, and is fully impregnated in the carboxymethyl cellulose solution for 30min, and then dried in a 60℃ oven, and then soaked in the calcium chloride solution for crosslinking at room temperature for 30min;

[0261] Step 4: The high ultraviolet reflective coating is applied to one side of the fabric after drying;

[0262] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0263] Example 28

[0264] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating includes a crosslinked product of carboxymethyl cellulose and calcium sulfate.

[0265] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0266] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0267] Step 2: A carboxymethyl cellulose solution with a mass fraction of 20% and a calcium sulfate solution with a mass fraction of 20% were prepared for use;

[0268] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the carboxymethyl cellulose solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution for crosslinking at room temperature for 40 min;

[0269] Step 4: After drying, the high ultraviolet reflective coating was applied to one side of the fabric;

[0270] Step 5: The resulting fabric was equilibrated at 70% humidity for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0271] Example 29

[0272] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating and a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a crosslinked product of carboxymethyl cellulose and calcium nitrate.

[0273] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0274] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high ultraviolet reflective coating for use;

[0275] Step 2: A carboxymethyl cellulose solution with a mass fraction of 20% and a calcium sulfate solution with a mass fraction of 20% were prepared for use;

[0276] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the carboxymethyl cellulose solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution for crosslinking at room temperature for 40 min;

[0277] Step 4: After drying, the high ultraviolet reflective coating was applied to one side of the fabric;

[0278] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0279] Example 30

[0280] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a polyester 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano magnesium oxide, and the moisture absorption coating includes a crosslinked product of carboxymethyl cellulose and calcium chloride.

[0281] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0282] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water at a temperature of 60℃, and the polyvinyl alcohol is fully dissolved and uniformly mixed by stirring, and then the temperature is lowered to 30℃, and 200g of nano magnesium oxide is added and stirred uniformly to prepare a high ultraviolet reflective coating for standby;

[0283] Step 2: A carboxymethyl cellulose solution with a mass fraction of 5% and a calcium chloride solution with a mass fraction of 10% are prepared for standby;

[0284] Step 3: The polyester 3D spacer fabric is cut to a size of 10cm x 10cm, and is fully impregnated in the carboxymethyl cellulose solution for 30min, and then is dried in a 60℃ oven, and then is soaked in the calcium chloride solution at room temperature for crosslinking for 30min;

[0285] Step 4: The high ultraviolet reflective coating is applied to both sides of the fabric after drying;

[0286] Step 5: The obtained fabric is balanced under 60% humidity for 2h to obtain the wide-band hyperspectral snow camouflage fabric.

[0287] Example 31

[0288] A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high ultraviolet reflective coating, a cotton 3D spacer fabric layer impregnated with a moisture absorption coating, and a high ultraviolet reflective coating, the high ultraviolet reflective coating includes polyvinyl alcohol and nano aluminum oxide, and the moisture absorption coating includes a crosslinked product of carboxymethyl cellulose and calcium sulfate.

[0289] A preparation method of a wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0290] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high-ultraviolet reflective coating for use;

[0291] Step 2: A carboxymethyl cellulose solution with a mass fraction of 20% and a calcium sulfate solution with a mass fraction of 20% were prepared for use;

[0292] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the carboxymethyl cellulose solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution for crosslinking at room temperature for 40 min;

[0293] Step 4: After drying, the high-ultraviolet reflective coating was applied to both sides of the fabric;

[0294] Step 5: The resulting fabric was equilibrated at 70% humidity for 3 h to obtain a wide-band high-spectrum snow camouflage fabric.

[0295] Example 32

[0296] A wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes a high-ultraviolet reflective coating, a polyester-cotton blended 3D spacer fabric layer impregnated with a moisture-absorbing coating, and a high-ultraviolet reflective coating. The high-ultraviolet reflective coating includes polyvinyl alcohol and nano-silicon dioxide, and the moisture-absorbing coating includes a crosslinked product of carboxymethyl cellulose and calcium nitrate.

[0297] A method for preparing a wide-band high-spectrum snow camouflage fabric compatible with ultraviolet-visible-near infrared light includes the following steps:

[0298] Step 1: 10 g of polyvinyl alcohol with a number average molecular weight of 70,000 was added to 990 g of water at a temperature of 70℃, and the polyvinyl alcohol was fully dissolved and uniformly dispersed after being fully stirred, and then the temperature was lowered to 30℃, 100 g of nano-aluminum oxide was added and stirred uniformly to prepare a high-ultraviolet reflective coating for use;

[0299] Step 2: A carboxymethyl cellulose solution with a mass fraction of 20% and a calcium sulfate solution with a mass fraction of 20% were prepared for use;

[0300] Step 3: The cotton 3D spacer fabric was cut to a size of 10 cm x 10 cm, fully immersed in the carboxymethyl cellulose solution for 40 min, dried in a 60℃ oven, and then immersed in the calcium sulfate solution for crosslinking at room temperature for 40 min;

[0301] Step 4: After drying, the high-ultraviolet reflective coating was applied to both sides of the fabric;

[0302] Step 5: The obtained fabric is balanced under 80% humidity for 4h to obtain the wide-band hyperspectral snow camouflage fabric.

[0303] Comparative Example 1

[0304] A preparation method of a high-ultraviolet reflection fabric, comprising the following steps:

[0305] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water with a temperature of 60℃, and the temperature is kept constant, and the polyvinyl alcohol is fully stirred and dissolved uniformly, and then the temperature is lowered to 30℃, 200g of nano magnesium oxide is added and stirred uniformly to prepare a high-ultraviolet reflection coating;

[0306] Step 2: The high-ultraviolet reflection coating is coated on one side of the polyester 3D fabric cut to a size of 10cm×10cm;

[0307] Step 3: The obtained fabric is balanced under 60% humidity for 2h to obtain the fabric of Comparative Example 1.

[0308] Comparative Example 2

[0309] A preparation method of a wide-spectrum simulation fabric, comprising the following steps:

[0310] Step 1: A sodium alginate solution with a mass fraction of 5% and a calcium chloride solution with a mass fraction of 10% are prepared for use;

[0311] Step 2: The polyester 3D spacer fabric is cut to a size of 10cm×10cm, and is fully soaked in the sodium alginate solution for 30min, and then is dried in a 60℃ oven, and then is soaked in the calcium chloride solution for crosslinking for 30min;

[0312] Step 3: The obtained fabric is balanced under 60% humidity for 2h to obtain the fabric of Comparative Example 2.

[0313] Comparative Example 3

[0314] A preparation method of a spectrum simulation fabric, comprising the following steps:

[0315] Step 1: 10g of polyvinyl alcohol with a number average molecular weight of 50000 is added to 990g of water with a temperature of 60℃, and the temperature is kept constant, and the polyvinyl alcohol is fully stirred and dissolved uniformly, and then the temperature is lowered to 30℃, 200g of nano magnesium oxide is added and stirred uniformly to prepare a high-ultraviolet reflection coating for use;

[0316] Step 2: A sodium alginate solution with a mass fraction of 5% and a calcium chloride solution with a mass fraction of 10% are prepared for use;

[0317] Step 3: Cut the single layer cotton fabric to 10 cm x 10 cm size, soak in the sodium alginate solution for 30 min, dry in the oven at 60°C, then soak in the calcium chloride solution at room temperature for 30 min;

[0318] Step 4: After drying, apply high ultraviolet reflective coating on one side of the fabric;

[0319] Step 5: Equilibrate the obtained fabric under 60% humidity for 2 h to obtain the fabric of Comparative Example 3.

[0320] Comparative Example 4

[0321] A method for preparing a spectral simulation fabric, comprising the following steps:

[0322] Step 1: Add 10 g of polyvinyl alcohol with a number average molecular weight of 50000 to 990 g of water with a temperature of 60°C, keep warm, stir thoroughly, and then cool to 30°C. Add 200 g of nano magnesium oxide and stir uniformly to prepare high ultraviolet reflective coating for use;

[0323] Step 2: Prepare a sodium alginate solution with a mass fraction of 5% and a calcium chloride solution with a mass fraction of 10% for use;

[0324] Step 3: Cut the single layer polyester fabric to 10 cm x 10 cm size, soak in the sodium alginate solution for 30 min, dry in the oven at 60°C, then soak in the calcium chloride solution at room temperature for 30 min;

[0325] Step 4: After drying, apply high ultraviolet reflective coating on one side of the fabric;

[0326] Step 5: Equilibrate the obtained fabric under 60% humidity for 2 h to obtain the fabric of Comparative Example 4.

[0327] Comparative Example 5

[0328] A method for preparing a spectral simulation fabric, comprising the following steps:

[0329] Step 1: Add 10 g of polyvinyl alcohol with a number average molecular weight of 50000 to 990 g of water with a temperature of 60°C, keep warm, stir thoroughly, and then cool to 30°C. Add 200 g of nano magnesium oxide and stir uniformly to prepare high ultraviolet reflective coating for use;

[0330] Step 2: Prepare a sodium alginate solution with a mass fraction of 5% and a calcium chloride solution with a mass fraction of 10% for use;

[0331] Step 3: cut the single layer polyester cotton blended fabric to 10cm x 10cm size, soak in the sodium alginate solution for 30min, dry in the 60℃ oven, then soak in the calcium chloride solution for 30min at room temperature;

[0332] Step 4: after drying, coat the high ultraviolet reflection paint on one side of the fabric;

[0333] Step 5: equilibrate the obtained fabric under the condition of 60% humidity for 2h to obtain the fabric of Comparative Example 5.

[0334] Comparative Example 6

[0335] A preparation method of a spectral simulation fabric, comprising the following steps:

[0336] Step 1: add 10g of polyvinyl alcohol with a number average molecular weight of 50000 into 990g of water with a temperature of 60℃, keep warm, and fully stir to make the polyvinyl alcohol fully dissolved and uniform, then cool to 30℃, and add 200g of nano magnesium oxide and stir uniformly to prepare high ultraviolet reflection paint for later use;

[0337] Step 2: prepare a sodium alginate solution with a mass fraction of 5% and a calcium chloride solution with a mass fraction of 10% for later use;

[0338] Step 3: cut the single layer polyamide fabric to 10cm x 10cm size, soak in the sodium alginate solution for 30min, dry in the 60℃ oven, then soak in the calcium chloride solution for 30min at room temperature;

[0339] Step 4: after drying, coat the high ultraviolet reflection paint on one side of the fabric;

[0340] Step 5: equilibrate the obtained fabric under the condition of 60% humidity for 2h to obtain the fabric of Comparative Example 6.

[0341] It can be known from the comparison of the spectral curves of the fabric of Example 1 and the fabrics of Comparative Examples 1 and 2 that a wide-band high-spectrum snow camouflage fabric covering ultraviolet-visible-near infrared can be obtained by the preparation method of the application. For the 3D spacer fabric, if only the high ultraviolet reflection paint is coated on the surface of the fabric without making a moisture absorption coating, like Comparative Example 1, the "water absorption valley" i.e. "water peak" required by the wide-band high-spectrum snow camouflage cannot be generated; on the contrary, if only the moisture absorption coating is made without coating the high ultraviolet reflection paint, like Comparative Example 2, the "high ultraviolet reflection area" required by the wide-band high-spectrum snow camouflage cannot be generated.

[0342] From the comparison of the spectral curves of Example 1 and Comparative Examples 3, 4, 5 and 6, it can be seen that for common fabric, even if a moisture absorption coating is made on the surface of the fabric and then a high ultraviolet reflection coating is made, high reflection and superposition of near-infrared "water peak" spectrum cannot be achieved, and the compatibility of high ultraviolet reflection and "water peak" simulation cannot be achieved. This is because the large amount of water molecules will reduce the reflectivity in the ultraviolet region, and the high ultraviolet reflection coating particles have a certain water absorption, and after absorbing water, the particles are deteriorated and the "water peak" is lost. Therefore, the fabric needs to be structurally designed, and the present application uses the fabric structure of 3D spaced fabric to appropriately separate the "ultraviolet reflection layer" and the "water peak simulation layer", reduce the mutual influence of the two, and make them work together to simulate a wide-band snow spectrum curve covering ultraviolet-visible-near-infrared.

[0343] The above provided examples are not intended to limit the scope covered by the present application, and the described steps are not intended to limit the execution order. Those skilled in the art can make obvious improvements to the present application in combination with existing common knowledge, which also falls within the protection scope defined by the claims of the present application.

Claims

1. A wide-band hyperspectral snow camouflage fabric compatible with ultraviolet-visible-near infrared light, characterized in that, The fabric comprises a high ultraviolet reflection coating and a 3D spacer fabric layer impregnated with a moisture absorption coating, raw materials of the high ultraviolet reflection coating comprise polyvinyl alcohol and inorganic white powder pigment, the moisture absorption coating comprises a polymer coating and a water-absorbable metal salt layer; wherein the inorganic white powder pigment comprises one or more of nano-magnesium oxide, nano-aluminum oxide, nano-silicon dioxide and barium sulfate, raw materials of the polymer coating comprise one or more of sodium alginate, sodium polyacrylate, phosphated dextran sodium, carboxymethylated cellulose, carboxymethylated sodium alginate, chitosan and polyvinyl alcohol, the water-absorbable metal salt comprises one or more of chlorides, sulfates and carbonates of calcium ions, zinc ions and aluminum ions; the moisture absorption coating is prepared by first impregnating the 3D spacer fabric in an aqueous solution of the polymer coating to form a polymer coating, then drying and impregnating in an aqueous solution of the water-absorbable metal salt to perform cross-linking reaction.

2. The wideband hyperspectral snow camouflage fabric according to claim 1, characterized in that, The fabric comprises a high ultraviolet reflection coating, a 3D spacer fabric layer impregnated with a moisture absorption coating and a high ultraviolet reflection coating, and the fabric of the 3D spacer fabric comprises pure cotton, polyester, nylon and polyester-cotton blended fabric.

3. The broadband hyperspectral snow camouflage fabric according to claim 1 or 2, characterized in that, The high ultraviolet reflection coating is prepared by mixing an aqueous solution of polyvinyl alcohol and inorganic white powder pigment to form high ultraviolet reflection coating, and the high ultraviolet reflection coating is coated on the surface of the 3D spacer fabric, and the coating method comprises at least one of spraying, calendering and roller coating.

4. The broadband hyperspectral snow camouflage fabric according to claim 3, characterized in that, The mass fraction of the aqueous solution of polyvinyl alcohol is 1-5%, and the number average molecular weight of polyvinyl alcohol is 50000-150000.

5. The wideband hyperspectral snow camouflage fabric according to claim 1 or 2, characterized in that, The thickness of the high ultraviolet reflection coating is 0.01-5 nm.

6. The wideband hyperspectral snow camouflage fabric according to claim 1 or 2, characterized in that, In the high ultraviolet reflection coating, the particle size of the nano-magnesium oxide is 20-50 nm, the particle size of the nano-aluminum oxide is 10-50 nm, the particle size of the nano-silicon dioxide is 10-50 nm, and the particle size of the barium sulfate is 200-500 nm.

7. The broadband hyperspectral snow camouflage fabric according to claim 1 or 2, characterized in that, In the high ultraviolet reflection coating, the mass ratio of the inorganic white powder pigment to the aqueous solution of polyvinyl alcohol is 1:25-1:

1.

8. The broadband hyperspectral snow camouflage fabric according to claim 3, wherein, The preparation method of the aqueous solution of polyvinyl alcohol is as follows: pour polyvinyl alcohol into water with a temperature of 60-90℃, keep warm, fully stir, cool to 30℃ after the polyvinyl alcohol is fully dissolved and uniform.

9. The wideband hyperspectral snow camouflage fabric according to claim 1 or 2, characterized in that, The mass fraction of the polymer coating in the aqueous solution of the polymer coating is 5-30%, and the thickness of the polymer coating is 0.01-5 nm.

10. The wideband hyperspectral snow camouflage fabric according to claim 1 or 2, characterized in that, The mass fraction of the water-absorbable metal salt in the aqueous solution of the water-absorbable metal salt is 10-50%, and the thickness of the water-absorbable metal salt layer is 0.01-5 nm.

11. A method for preparing the compatible ultraviolet-visible-near infrared wide band hyperspectral snow camouflage fabric according to any one of claims 1-10, characterized in that, The method comprises the following steps: (1) Preparation of high ultraviolet reflection coating: add inorganic white powder pigment to the aqueous solution of polyvinyl alcohol, stir uniformly, and prepare high ultraviolet reflection coating; (2) Preparation of moisture absorption coating reaction solution: prepare an aqueous solution of polymer coating with a mass fraction of 5-30% and an aqueous solution of water-absorbable metal salt with a mass fraction of 10-50%; (3) Preparation of water-absorbing transparent coating: 3D spacer fabric is first soaked in a water solution of high polymer coating, and then dried in an oven at 60 DEG C after soaking for 30-60 min; then the fabric with high polymer coating is soaked in a water solution of water-absorbing metal salt, and cross-linked at 20-30 DEG C for 30-60 min, and then dried; (4) Preparation of high ultraviolet reflective coating: high ultraviolet reflective coating is applied on the surface of the water-absorbing coating, and constant humidity treatment is performed to obtain a snow camouflage fabric.

12. The method of claim 11, wherein, The high polymer coating is sodium alginate, and the water-absorbing metal salt is calcium chloride.

13. The method of claim 11, wherein, In step (4), the constant humidity treatment is that the fabric coated with high ultraviolet reflective coating is equilibrated at 60-90% humidity for 2-5 h.

14. Application of the wide-band high-spectrum snow camouflage fabric according to any one of claims 1-10 in the field of snow camouflage.

15. Use according to claim 14, characterized in that, The application includes application in the preparation of camouflage for military machinery, camouflage net in individual combat, combat uniform, tank armor, information shelter and shelter.

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