CN114216372A - Graphene composite bulletproof plate and preparation method thereof - Google Patents
Graphene composite bulletproof plate and preparation method thereof Download PDFInfo
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- CN114216372A CN114216372A CN202111391565.3A CN202111391565A CN114216372A CN 114216372 A CN114216372 A CN 114216372A CN 202111391565 A CN202111391565 A CN 202111391565A CN 114216372 A CN114216372 A CN 114216372A
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- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims description 17
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/04—Plate construction composed of more than one layer
- F41H5/0414—Layered armour containing ceramic material
- F41H5/0428—Ceramic layers in combination with additional layers made of fibres, fabrics or plastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
- B32B37/1018—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure using only vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
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- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
- B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
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- B32B2262/0269—Aromatic polyamide fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
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- B32B2571/00—Protective equipment
- B32B2571/02—Protective equipment defensive, e.g. armour plates, anti-ballistic clothing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides grapheneThe composite bulletproof plate is characterized in that a bullet-facing surface is sequentially provided with a crack stop layer, a graphene bulletproof ceramic layer, a first transition layer, a second transition layer and a back plate, and two adjacent layers are bonded through a hot melt adhesive film layer, wherein the graphene bulletproof ceramic layer is made of Al added with graphene powder2O3Bulletproof ceramic, SiC bulletproof ceramic, B4C, one or more of the bulletproof ceramics, wherein the addition amount of the graphene powder is 0.5-1% of the total mass of the layer. The composite bulletproof plate can provide stable protection capability, and the total surface density of the composite bulletproof plate is 40-45kg/m through optimizing the design of a bulletproof structure2Within the range, the 3-shot 53-type 7.62mm API impact can be effectively prevented at a distance of 100 m.
Description
Technical Field
The invention belongs to the technical field of military (police) equipment, and particularly relates to a graphene composite bulletproof plate and a preparation method thereof.
Background
In modern war, protection of vehicles is of paramount importance. In world war ii, protective armor was made primarily of metallic materials. Such as steel armor, aluminum alloy armor, also known as homogeneous armor. The metal material has great advantages in bulletproof performance, manufacturability and cost, but the too large mass can cause the maneuverability of vehicles and fighters equipped with the metal armor to be greatly reduced and lose the original fighting capacity. At the same time, homogeneous armor is not able to resist the attack of such weapons as the penetration of anti-tambourine projectiles, missiles and rocket projectiles continues to increase.
With the development of science and technology, the bulletproof armor is updated for many times, from hard metal to ceramic material and then to high-performance composite material fiber material, from a simple synthetic material to a composite system of multiple materials, and the development of the bulletproof armor is simply summarized into three stages: the steel plate armor plate, the ceramic armor plate and the high-performance fiber reinforced resin matrix composite armor plate gradually develop towards the direction of light weight, and therefore, the weight reduction work of the bulletproof armor is started in all countries. How to improve the armor protection capability through the structural design on the premise of light weight is the central importance of research of the technicians in the field.
At present, the ultrahigh molecular weight polyethylene fiber is the fiber with the highest specific strength, and the specific modulus is only second to that of carbon fiber. Patent application number 201911175070. X-A preparation method of a PE armor discloses a preparation method of a pure PE armor. Patent application No. 201620566289.8, composite structure of PE armor, discloses a composite structure of PE armor. The bulletproof plates in the two patent applications are made of single materials, namely ultra-high molecular weight polyethylene fibers.
Aramid bulletproof composite materialThe laminated board has the characteristics of high strength, high toughness, high limiting oxygen index, difficult melting and the like, but the density and the price of the laminated board are higher than those of the ultrahigh molecular weight polyethylene fiber by a certain amount. Patent application No. 201920053656.8, composite body armor, bullet-proof vehicle, proposes composite body armor. This compound bulletproof plate includes: the panel is made of ceramic materials, is arranged on the lower surface of the first adhesive layer and is made of foamed aluminum, and the outer surface of the energy absorption layer is coated by aramid fibers; the second adhesive layer is arranged on the lower surface of the energy absorption layer; the backplate sets up and is formed by high strength steel sheet at the lower surface of second glue film: and the shell completely covers the upper surface of the panel and the lower surface of the back plate and is formed by polyurea. But the surface density of the composite bulletproof plate is 60-70kg/cm2The areal density is higher.
Disclosure of Invention
In view of this, the invention provides a graphene composite bulletproof plate and a preparation method thereof, aiming at overcoming the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a compound bulletproof plate of graphite alkene, sets gradually crack stop layer, the shellproof ceramic layer of graphite alkene, first transition layer, second transition layer and backplate by the bullet-facing side, bonds through the hot melt adhesive rete between adjacent two-layer, and wherein, the material of the shellproof ceramic layer of graphite alkene is for adding the Al that has graphite alkene powder2O3Bulletproof ceramic, SiC bulletproof ceramic, B4C, one or more of the bulletproof ceramics, wherein the addition amount of the graphene powder is 0.5-1% of the total weight of the layer.
Preferably, the first transition layer is made of a carbon fiber plate, and the thickness of the first transition layer is 0.3-2 mm.
Preferably, the carbon fiber plate is formed by laying and hot-pressing 2-6 layers of carbon fiber prepregs.
Preferably, the material of the second transition layer is aramid UD board, and the thickness is 0.3-4 mm.
Preferably, the aramid UD board is formed by hot pressing of 2-6 aramid UD cloth laying layers.
Preferably, the crack-stopping layer is an aramid woven fabric layer, and the thickness of the crack-stopping layer is 0.3-3 mm.
Preferably, the thickness of the hot melt adhesive film layer is 0.12-0.15mm, and the surface density is 100-2。
Preferably, the material of the hot melt adhesive film layer is one of a TPU adhesive film, a PU adhesive film, an EVA adhesive film, a PO adhesive film, an epoxy resin film, an organic silica gel film, a polyurethane adhesive film, a thermosetting adhesive film, a thermoplastic adhesive film, a phenolic resin adhesive film, a polyacrylic resin adhesive film, a polymethacrylate adhesive film, a polycarbonate adhesive film, a polyvinyl acetate adhesive film, and a polyvinyl acetal adhesive film.
Preferably, the surface density of the graphene composite bulletproof plate is 60-70kg/cm2。
The invention also provides a preparation process of the graphene composite bulletproof plate, which specifically comprises the following steps:
(1) preparing a first transition layer, a second transition layer and a back plate through a layering hot pressing process;
(2) sequentially layering a crack stop layer, a graphene bulletproof ceramic layer, a first transition layer, a second transition layer and a back plate in sequence, and adding hot melt adhesive films among the layers for bonding to form a prefabricated member;
(3) and putting the prefabricated part into a vacuum bag, putting the vacuum bag into an autoclave for periodic heating and vacuumizing, and cooling to obtain the composite bulletproof plate.
Preferably, the step of heating and vacuumizing in step (3) is as follows:
the first stage time is 30-80min, the vacuum pressure is controlled at 0.5-2MPa, and the temperature is controlled at 80-120 ℃;
the second stage time is 60-120min, the vacuum pressure is controlled at 1-4MPa, and the temperature is controlled at 100-150 ℃;
the time of the third stage is 60-120min, the vacuumizing pressure is controlled at 1-4MPa, and the temperature is controlled at 100-150 ℃.
Preferably, the ply hot-pressing process in the step (1) comprises the following steps: the raw materials are put into a die and then subjected to three-stage heating and pressurizing operation, which comprises the following specific operations:
the first stage is as follows: heating the mold to 60-90 deg.C, under 6-8MPa, at a heating rate of 2-5 deg.C/min;
and a second stage: the temperature of the die is raised to 100-120 ℃, and the pressure is 12-17 MPa;
and a third stage: the temperature of the die is raised to 110-150 ℃ and the pressure is 20-25 MPa;
and after the temperature and the pressure of the mold reach the third stage, stopping heating and pressurizing, keeping the temperature and the pressure for 20-60min, reducing the temperature at the rate of 2-5 ℃/min, when the temperature is reduced to 30-60 ℃, starting pressure relief, reducing the pressure to 0MPa, and opening the mold and taking out.
Compared with the prior art, the invention has the following advantages:
the composite bulletproof plate can provide stable protection capability, and the total surface density of the composite bulletproof plate is 40-45kg/m through optimizing the design of a bulletproof structure2Within the range, the 3-shot 53-type 7.62mm API impact can be effectively prevented at a distance of 100 m.
Drawings
Fig. 1 is a schematic structural diagram of a graphene composite bulletproof plate according to an embodiment of the present invention.
Description of reference numerals:
1. a crack stop layer; 2. a hot melt adhesive film layer; 3. a graphene bulletproof ceramic layer; 4. a first transition layer; 5. a second transition layer; 6. a back plate.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The invention will be described in detail with reference to the following examples.
Example 1
(1) Preparation of graphene bulletproof ceramic layer
Mixing 100 parts by mass of silicon carbide and 0.5 part by mass of graphene powder, stirring and mixing for 45min in a ball mill at the rotating speed of 400r/min, pouring the powder into a mould after uniform mixing, putting the mixed powder into a press for pressing for 12min under the pressure of 7Mpa by adopting hot-pressing sintering, putting the pressed ceramic plate into an atmosphere furnace for sintering, starting heating to 850 ℃ at the heating speed of 3 ℃/min, then heating to 1480 ℃ at the heating speed of 2 ℃/min, preserving heat for 2 hours, and then cooling to 80 ℃ at the speed of 5 ℃ to obtain the graphene bulletproof ceramic plate.
(2) Preparing a first transition layer
Laying 2 layers of carbon fiber prepreg in a corresponding mould, and carrying out three-stage heating and pressurizing operation, wherein the three-stage heating and pressurizing operation comprises the following specific operations:
the first stage is as follows: heating the mold to 80 ℃, wherein the pressure is 7MPa, and the heating rate is 5 ℃/min;
and a second stage: heating the mold to 120 ℃ and keeping the pressure at 15 MPa;
and a third stage: heating the die to 130 ℃ and keeping the pressure at 20 MPa;
and after the temperature and the pressure of the mold reach the third stage, stopping heating and pressurizing, keeping the temperature and the pressure for 60min, reducing the temperature at the rate of 5 ℃/min, when the temperature is reduced to 30 ℃, starting pressure relief, reducing the pressure to 0MPa, and opening and taking out the mold to obtain a first transition layer with the thickness of 0.3 mm.
(3) Preparing a second transition layer
And (3) placing 2 layers of aramid UD cloth in corresponding moulds, and finally preparing a second transition layer with the thickness of 0.3mm by using the other preparation methods and the carbon fiber plate.
(4) Preparation of PE backboard
15 layers of PEUD are arranged in a corresponding die, and the other preparation methods are the same as those of the carbon fiber plate, so that the PE back plate with the thickness of 8mm is finally prepared.
(5) Preparation of graphene composite bulletproof plate
Sequentially layering aramid fiber woven fabric, a graphene bulletproof ceramic layer, a first transition layer, a second transition layer and a back plate in sequence, wherein the thickness of each layer is 0.12mm, and the surface density is 150g/m2The TPU glue films are bonded to form a prefabricated part; and putting the prefabricated part into a vacuum bag, putting the vacuum bag into an autoclave for periodic heating and vacuumizing, and cooling to obtain the composite bulletproof plate. The step-by-step heating and vacuumizing operation comprises the following steps: the first stage time is 50min, the vacuumizing pressure is controlled at 2MPa, and the temperature is controlled at 120 ℃; the second stage time is 120min, and the vacuum pumping pressure is controlledThe temperature is controlled at 4MPa and 120 ℃; the third stage time is 120min, the vacuumizing pressure is controlled at 4MPa, and the temperature is controlled at 150 ℃.
The composite bulletproof plate is taken out of the vacuum bag for polishing, and the method comprises the following specific steps: polishing the composite bulletproof plate by using an angle grinder, wherein the rotating speed of the angle grinder is 2000 r/min, and polishing the composite bulletproof plate by using 500-mesh coarse sand paper for 10 min; then 1500 meshes of fine sand paper is replaced for post-polishing treatment; and (5) grinding for 10 min.
Through detection, the surface density of the prepared graphene composite bulletproof plate is 41.6kg/m2。
Example 2
The preparation methods of the graphene bulletproof ceramic layer, the first transition layer, the second transition layer, the PE back plate and the final graphene composite bulletproof plate are the same as those in example 1, except that the graphene powder in the graphene bulletproof ceramic layer is 0.8 parts by mass. Through detection, the surface density of the prepared graphene composite bulletproof plate is 42.3kg/m2。
Example 3
The preparation method of the graphene bulletproof ceramic layer, the first transition layer, the second transition layer, the PE back plate and the final graphene composite bulletproof plate is the same as that in example 1, except that the graphene powder in the graphene bulletproof ceramic layer is 1 part by mass. Through detection, the surface density of the prepared graphene composite bulletproof plate is 42.7kg/m2。
Example 4
The preparation method of the graphene bulletproof ceramic layer, the first transition layer, the second transition layer, the PE backboard and the final graphene composite bulletproof plate is the same as that in example 1, except that the number of carbon fiber prepreg layers in the first transition layer is 6, the thickness is 4mm, the number of aramid UD cloth in the second transition layer is 6, the thickness is 4mm, the number of PEUD cloth layers in the PE backboard is 19, and the thickness is 10 mm. Through detection, the surface density of the prepared graphene composite bulletproof plate is 44.6kg/m2。
The graphene composite armor prepared in examples 1-4 was subjected to a shooting test in which three 7.62mm armor-piercing fire bullets were fired at a firing distance of 100 meters, and the results of the shooting test are shown in the following table:
from the shooting test results in the table above, it can be seen that the graphene composite bulletproof plates prepared in the embodiments 1 to 4 of the invention can resist the attack of 3-shot 7.62mm armor-piercing combustion bombs, and the back plates are not penetrated.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a compound bulletproof plate of graphite alkene which characterized in that: set gradually crack stop layer, the shellproof ceramic layer of graphite alkene, first transition layer, second transition layer and backplate by the bullet-facing side, bond through the hot melt adhesive rete between adjacent two-layer, wherein, the material of the shellproof ceramic layer of graphite alkene is for adding the Al that has graphite alkene powder2O3Bulletproof ceramic, SiC bulletproof ceramic, B4C, one or more of the bulletproof ceramics, wherein the addition amount of the graphene powder is 0.5-1% of the total mass of the layer.
2. The graphene composite ballistic panel of claim 1, wherein: the first transition layer is made of carbon fiber plates and has a thickness of 0.3-2 mm.
3. The graphene composite ballistic panel of claim 2, wherein: the carbon fiber plate is formed by laying and hot-pressing 2-6 layers of carbon fiber prepreg.
4. The graphene composite ballistic panel of claim 1, wherein: the second transition layer is made of aramid UD plates, the thickness of each aramid UD plate is 0.3-4mm, and preferably, the aramid UD plates are formed by hot pressing of 2-6 aramid UD cloth laying layers.
5. The graphene composite ballistic panel of claim 1, wherein: the crack-stopping layer is an aramid fiber woven fabric layer with the thickness of 0.3-3 mm.
6. The graphene composite ballistic panel of claim 1, wherein: the thickness of the hot melt adhesive film layer is 0.12-0.15mm, and the surface density is 100-2(ii) a Preferably, the material of the hot melt adhesive film layer is one of a TPU adhesive film, a PU adhesive film, an EVA adhesive film, a PO adhesive film, an epoxy resin film, an organic silica gel film, a polyurethane adhesive film, a thermosetting adhesive film, a thermoplastic adhesive film, a phenolic resin adhesive film, a polyacrylic resin adhesive film, a polymethacrylate adhesive film, a polycarbonate adhesive film, a polyvinyl acetate adhesive film, and a polyvinyl acetal adhesive film.
7. The graphene composite ballistic panel of claim 1, wherein: the surface density of the graphene composite bulletproof plate is 60-70kg/cm2。
8. The method for preparing the graphene composite bulletproof plate of any one of claims 1 to 7, which is characterized in that: the method comprises the following steps:
(1) preparing a first transition layer, a second transition layer and a back plate through a layering hot pressing process;
(2) sequentially layering a crack stop layer, a graphene bulletproof ceramic layer, a first transition layer, a second transition layer and a back plate in sequence, and adding hot melt adhesive films among the layers for bonding to form a prefabricated member;
(3) and putting the prefabricated part into a vacuum bag, putting the vacuum bag into an autoclave for periodic heating and vacuumizing, and cooling to obtain the composite bulletproof plate.
9. The preparation method of the graphene composite bulletproof plate according to claim 8, and being characterized in that: the step of heating and vacuumizing in the step (3) comprises the following steps:
the first stage time is 30-80min, the vacuum pressure is controlled at 0.5-2MPa, and the temperature is controlled at 80-120 ℃;
the second stage time is 60-120min, the vacuum pressure is controlled at 1-4MPa, and the temperature is controlled at 100-150 ℃;
the time of the third stage is 60-120min, the vacuumizing pressure is controlled at 1-4MPa, and the temperature is controlled at 100-150 ℃.
10. The preparation method of the graphene composite bulletproof plate according to claim 8, and being characterized in that: the layering hot pressing process in the step (1) comprises the following steps: the raw materials are put into a die and then subjected to three-stage heating and pressurizing operation, which comprises the following specific operations:
the first stage is as follows: heating the mold to 60-90 deg.C, under 6-8MPa, at a heating rate of 2-5 deg.C/min;
and a second stage: the temperature of the die is raised to 100-120 ℃, and the pressure is 12-17 MPa;
and a third stage: the temperature of the die is raised to 110-150 ℃ and the pressure is 20-25 MPa;
and after the temperature and the pressure of the mold reach the third stage, stopping heating and pressurizing, keeping the temperature and the pressure for 20-60min, reducing the temperature at the rate of 2-5 ℃/min, when the temperature is reduced to 30-60 ℃, starting pressure relief, reducing the pressure to 0MPa, and opening the mold and taking out.
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