CN113834384B - Bulletproof backboard with bionic laminated structure and preparation method thereof - Google Patents
Bulletproof backboard with bionic laminated structure and preparation method thereof Download PDFInfo
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- CN113834384B CN113834384B CN202111111643.XA CN202111111643A CN113834384B CN 113834384 B CN113834384 B CN 113834384B CN 202111111643 A CN202111111643 A CN 202111111643A CN 113834384 B CN113834384 B CN 113834384B
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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
- F41H5/0471—Layered armour containing fibre- or fabric-reinforced layers
- F41H5/0485—Layered armour containing fibre- or fabric-reinforced layers all the layers being only fibre- or fabric-reinforced layers
Abstract
A bulletproof backboard with a bionic laminated structure consists of a carbon fiber layer and a polyethylene fiber layer, and is characterized in that n layers of polyethylene fiber layers are overlapped below a single carbon fiber layer to form a module, n is 10-30, and fiber filament directions between two adjacent polyethylene fiber layers are distributed at an angle of x DEGAnd (3) superposing and compounding a plurality of modules, wherein the fiber filament directions of the carbon fiber layers in the adjacent modules are distributed at 90 degrees, and the number of the superposed modules is not less than 3. The bulletproof back plate surface of the bionic bottom layer structure prepared by the invention has high protective performance and bending strength>90MPa, shore hardness value of>80Shore D, impact toughness>20kN, excellent mechanical property and surface density of 3.25kg/m 2 When the V50 of the anti-elastic material reaches 604m/s, the anti-elastic material has excellent anti-elastic performance, and has higher light weight level, and has great advantages in the fields of individual protection, small-caliber armor protection and the like.
Description
Technical Field
The invention relates to the technical field of bulletproof materials, in particular to a bulletproof backboard with a bionic laminated structure and a preparation method thereof.
Background
Some marine organisms have tough biological defensive shells, and the biological structure is mostly composed of collagen nanofibers and inorganic salt crystals, such as shrimp and crab shells, fish scales and the like, and is characterized in that an outer layer is a rigid impact layer of oriented highly crystalline crystals, and a spiral nano collagen fiber weft-free structure is arranged below the impact layer, and is called a Brin root structure. The principle of energy absorption by the brin root structure can be explained as: the crystal shell homogenizes the impact energy, and the soft fiber structure continuously consumes the kinetic energy into the mutual motion of fibers and the mutual motion of layer-to-layer friction; most importantly, the spiral fiber has mechanical anisotropy, so that the kinetic energy of impact is more easily consumed.
The traditional bulletproof structure adopts ceramic/PE plate, ceramic/aramid plate or ceramic/metal and the like, wherein the ceramic/PE plate and the ceramic/aramid plate are mainly used for protecting medium-caliber and small-caliber bullets, and the properties of domestic PE and aramid cannot meet the existing protection requirements. In the case of difficult breakthrough of material performance, the design of a novel laminated bulletproof structure with higher protection capability by using a material with limited performance is an effective way for solving the problem. Patent CN 108372692A discloses a multi-element composite toughened bionic structural armor and a preparation method thereof, which researches the structure of a turtle shell and carries out bionic manufacture on the turtle shell, but the structure adopts high-purity titanium, aluminum, titanium alloy and the like, which tends to increase the weight of the armor and can not meet the requirement of equipment on light weight; in addition, the manufacturing process is complex, the manufacturing cost is increased, and the actual use of the device is affected; finally, the protective properties of the structure have not been verified. Patent CN111678382 a discloses a lightweight impact-resistant bionic bulletproof board, which takes the head structure of a woodpecker as a bionic prototype, but the woodpecker pecking process is equivalent to striking a relatively soft tree with a hard skull, while the bulletproof board is to resist a relatively hard bullet, the difference of the essential principle is not suitable for the bionic of the bulletproof field, secondly, the ultra-high molecular weight polyethylene fiber is used for blocking the impact of the bullet through the ultra-high breaking elongation, if the fiber board is perforated, the bulletproof performance of the fiber board is greatly weakened, and the practical application has a great limitation. Therefore, the prior preparation of the bionic laminated bulletproof structure has the problems of poor bulletproof performance and low light weight level of the structure, and limits the application range of the structure, namely the bulletproof performance and the light weight level of the structure cannot be ensured at the same time.
Disclosure of Invention
In view of the above problems, the invention aims to provide a bulletproof back plate with a bionic laminated structure, which solves the problem of insufficient protective performance of the existing domestic material, ensures excellent bulletproof performance and has higher light weight level.
The invention also aims to provide a preparation method of the bulletproof backboard with the bionic laminated structure.
The invention aims at realizing the following technical scheme:
a bulletproof backboard with a bionic laminated structure is characterized in that: the back plate is composed of carbon fiber layers and polyethylene fiber layers, and is characterized in that n layers of polyethylene fiber layers are overlapped under a single carbon fiber layer to form modules, n is 10-30, fiber filament directions between two adjacent polyethylene fiber layers are distributed in x degrees, x is not equal to 0, a plurality of modules are overlapped and compounded, fiber filament directions of the carbon fiber layers in the adjacent modules are distributed in 90 degrees, and the number of overlapped modules is not less than 3.
Further, the carbon fibers in the stacked modules are at least one of T600, T700 and T800 carbon fibers in sequence.
Preferably, any two of the T600, T700 and T800 carbon fibers are selected from the adjacent modules.
T600, T700 and T800 are carbon fiber materials with sequentially increasing strength.
Preferably, the carbon fibers in the bulletproof backboard are sequentially T800 carbon fibers, T700 carbon fibers and T600 carbon fibers in a module from top to bottom for circulation, and the number of layers of the ultra-high molecular weight polyethylene fiber layers in the module from top to bottom is sequentially increased.
Further, the carbon fiber layer is prepared by prepreg treatment of carbon fibers through phenolic resin, epoxy resin and polyurethane, and the polyethylene fiber layer is prepared by prepreg treatment of polyethylene fibers through phenolic resin, epoxy resin and polyurethane.
The preparation method of the bulletproof backboard with the bionic laminated structure is characterized by comprising the following steps of: impregnating carbon fibers by adopting a mixed resin 1 consisting of phenolic resin, epoxy resin and polyurethane to form a carbon fiber layer, impregnating high molecular weight polyethylene fibers by adopting a mixed resin 2 consisting of phenolic resin, epoxy resin and polyurethane to form a polyethylene fiber layer, forming a module by 1 layer of carbon fiber layer and n layers of polyethylene fiber layers, superposing more than 3 modules to form a composite layering structure, then carrying out warm-pressing compounding, specifically carrying out heat preservation at 90 ℃ for 5-15 min, then carrying out heat preservation at 110 ℃ for 30-60 min, then carrying out natural cooling, stabilizing the pressure at 11-15 MPa, and continuing until cooling is finished.
It is known in the art that the higher the areal density of a ballistic resistant material, the better the ballistic resistant performance, but an increase in areal density results in a reduction in the weight level of the material, under otherwise unchanged conditions. In the invention, carbon fiber is used as hard material, ultra-high molecular weight polyethylene fiber is used as soft material, and by combining specific lamination modules and combining specific compounding processes, through the relative movement between layers, the stepped transmission of the impact force between the modules realizes the stepped uniform dispersion of the impact force, and the impact force has excellent anti-elastic performance even if the surface density is lower.
Further, the temperature and pressure combination is to heat up to 90 ℃ at a heating rate of 1-2 ℃/min, keep the temperature for 5-15 min, then heat up to 110 ℃ at a heating rate of 0.5-1 ℃/min, keep the temperature for 30-60 min, naturally cool down, and when the temperature is raised for 50-60 min, the pressure starts to heat up to 11-15 MPa at a heating rate of 0.1-0.5 MPa/min, and the cooling is continued until the end of the cooling.
Preferably, the temperature and pressure combination is to heat up to 90 ℃ at a heating rate of 1.5 ℃/min, keep the temperature for 10min, then heat up to 110 ℃ at a heating rate of 1 ℃/min, keep the temperature for 40min, naturally cool down, and when the temperature is raised for 50-60 min, the pressure starts to rise to 12MPa at a heating rate of 0.4MPa/min, and the cooling is continued until the end.
Further, in the mixed resin 1, phenolic resin, epoxy resin and polyurethane are mixed according to the mass ratio of 0.5-1:5-6:1.5-2, and diluted with acetone to the mass percentage concentration range of 80% -90%.
Further, in the mixed resin 2, phenolic resin, epoxy resin and polyurethane are mixed according to a mass ratio of 1-2:1-2:6-8, and diluted with acetone to a mass percentage concentration range of 85% -95%.
The preparation method of the bulletproof backboard with the bionic laminated structure is characterized by comprising the following steps of: s1, preparing a carbon fiber layer:
s1.1 adopts phenolic resin, epoxy resin and polyurethane to mix according to the mass ratio of 0.5-1:5-6:1.5-2, acetone is added to stir for 10-15 min at 100-150 rpm, and the mixture is diluted into mixed resin 1 with the mass percentage concentration range of 80-90% for standby;
s1.2, impregnating the carbon fiber by adopting the mixed resin 1 prepared in the S1.1, wherein the impregnating temperature is 95-100 ℃, the impregnating time is 5-10 min, the impregnated carbon fiber is dried for 4-6 min at 45-50 ℃, and the mass ratio of the resin content is controlled to be 5-10% by adopting an extrusion roller;
s2, preparation of polyethylene fiber layer
S2.1, mixing phenolic resin, epoxy resin and polyurethane according to the mass ratio of 1-2:1-2:6-8, adding acetone, stirring for 10-15 min at 100-150 rpm, and diluting to obtain mixed resin 2 with the mass percentage concentration range of 85% -95% for later use;
s2.2, adopting the step S2.1 to prepare mixed resin 2 to impregnate the ultra-high molecular weight polyethylene fiber, wherein the temperature is 80-85 ℃, the impregnation is carried out for 5-10 min, the impregnation is carried out for 4-6 min at 45-50 ℃, and the mass ratio of the resin content is controlled to be 2-5% by adopting an extrusion roller;
s3, preparation of bionic laminated composite structure
S3.1 according to actual requirements, the composite layering structure sequentially comprises 1 carbon fiber layer and n layers from top to bottom 1 Module 1 formed by ultra-high molecular weight polyethylene fiber layers, and 1 carbon fiber layer and n are overlapped 2 Module 2 formed by the ultra-high molecular weight polyethylene fiber layers, and further overlapped by 1 carbon fiber layer and n 3 The module 3 formed by the ultra-high molecular weight polyethylene fiber layer is continuously laminated to the carbon fiber layer formed by 1 layer and n layers m Module m, where n 1 、n 2 、n 3 Taking 10-30 m is more than or equal to 3 and is a positive integer;
s3.2, carrying out warm-pressing compounding on the paved composite pavement structure, heating to 90 ℃ at the speed of 1-2 ℃/min in the compounding process, preserving heat for 5-15 min, then heating to 110 ℃ at the speed of 0.5-1 ℃/min, preserving heat for 30-60 min, naturally cooling, heating to 11-15 MPa at the speed of 0.1-0.50 MPa/min when heating to 50-60 min, and continuing until cooling is finished.
The invention has the following technical effects:
the bulletproof back plate surface of the bionic bottom layer structure prepared by the invention has high protective performance and bending strength>90MPa, shore hardness value of>80Shore D, impact toughness>20kN, excellent mechanical property and surface density of 3.25kg/m 2 When the V50 of the composite material reaches 604m/s, the composite material has excellent bulletproof performance, makes up for short plates with insufficient performance of domestic bulletproof materials, has higher light weight level, and has great advantages in the fields of individual protection, small-caliber armor protection and the like.
Drawings
Fig. 1: the bionic laminated bulletproof backboard structure schematic diagram prepared by the invention.
Fig. 2: layering schematic of carbon fiber layers in adjacent modules.
Fig. 3: layering schematic of polyethylene fiber layers.
Fig. 4: temperature pressure curve graph of the compounding process of example 1 of the present invention.
Detailed Description
The present invention is described in detail below by way of examples, which are necessary to be pointed out herein for further illustration of the invention and are not to be construed as limiting the scope of the invention, since numerous insubstantial modifications and adaptations of the invention will be to those skilled in the art in light of the foregoing disclosure.
Example 1
The preparation method of the bulletproof backboard with the bionic laminated structure comprises the following steps:
s1, preparing a carbon fiber prepreg:
s1.1, mixing phenolic resin, epoxy resin and polyurethane according to a mass ratio of 1:5:2, adding acetone, stirring for 12min at 120rpm, and diluting to a mixed resin 1 with a mass percentage concentration of 88%;
s1.2, impregnating the carbon fiber by adopting the mixed resin 1 prepared in the S1.1, wherein the impregnating temperature is 98 ℃, the impregnating time is 6min, the impregnated carbon fiber is dried for 5min at 48 ℃, and the mass ratio of the resin content is controlled to be 5% by adopting an extrusion roller;
s2, preparation of polyethylene fiber prepreg
S2.1, mixing phenolic resin, epoxy resin and polyurethane according to the mass ratio of 1:1:8, adding acetone, stirring for 12min at 120rpm, and diluting to mixed resin 2 with the mass percentage concentration of 92% for later use;
s2.2, adopting the step S2.1 to prepare mixed resin 2 to impregnate the ultra-high molecular weight polyethylene fiber, wherein the temperature is 82 ℃, the impregnation is carried out for 6min, the impregnation is carried out for 5min at 48 ℃, and the mass ratio of the resin content is controlled to be 2% by adopting an extrusion roller;
s3, preparation of bionic laminated composite structure
S3.1, the composite layering structure is that 1 layer of T800 carbon fiber prepreg cloth and 10 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 1,1 layer of T700 carbon fiber prepreg cloth and 11 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 2,1 layer of T600 carbon fiber prepreg cloth and 15 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 3 from top to bottom, the fiber filament directions of the carbon fiber prepreg cloth in adjacent modules are distributed at 90 degrees, and the fiber filament directions of the ultra-high molecular weight polyethylene of the adjacent layers are not at 0 degrees;
s3.2, carrying out warm-pressing compounding on the paved composite pavement structure, heating to 90 ℃ at a heating rate of 1.5 ℃/min in the compounding process, preserving heat for 10min, then heating to 110 ℃ at a heating rate of 1 ℃/min, preserving heat for 40min, naturally cooling, and when heating for 55min, heating to 12MPa at a heating rate of 0.4MPa/min, and continuing until cooling is finished, wherein the process is carried out according to a compound warm-pressing curve shown in FIG. 4.
After cooling, taking out the pressed bulletproof backboard with the bionic laminated structure, and testing the bulletproof performance of the bulletproof backboard, wherein the bending strength of the backboard with the bionic laminated structure prepared in the embodiment is more than 90MPa, the Shore hardness value is more than 80Shore D, and the impact toughness is more than 20kN. Wherein the V50 value is tested according to GB/T32497-2016.
Example 2
Unlike example 1, in the preparation process of the bionic laminated composite structure of this example, the layering sequence set from top to bottom is as follows: 1 layer of T800 carbon fiber prepreg cloth, 12 layers of ultra-high molecular weight polyethylene fiber prepreg cloth, 1 layer of T700 carbon fiber prepreg cloth, 12 layers of ultra-high molecular weight polyethylene fiber prepreg cloth, 1 layer of T600 carbon fiber prepreg cloth and 12 layers of ultra-high molecular weight polyethylene fiber prepreg cloth; in the layering process, the fiber yarn direction of each adjacent carbon fiber layer is ensured to be distributed at 90 degrees, and the direction of the ultra-high molecular weight polyethylene fiber yarn of each adjacent layer is randomly distributed at x degrees (x is not equal to 0). The rest of the preparation is the same as in example 1.
Example 3
Unlike example 1, in the preparation process of the bionic laminated composite structure of this example, the layering sequence set from top to bottom is as follows: 1 layer of T800 carbon fiber prepreg cloth, 10 layers of ultra-high molecular weight polyethylene fiber prepreg cloth, 1 layer of T800 carbon fiber prepreg cloth, 11 layers of ultra-high molecular weight polyethylene fiber prepreg cloth, 1 layer of T800 carbon fiber prepreg cloth and 15 layers of ultra-high molecular weight polyethylene fiber prepreg cloth; in the layering process, the fiber yarn direction of each adjacent carbon fiber layer is ensured to be distributed at 90 degrees, and the direction of the ultra-high molecular weight polyethylene fiber yarn of each adjacent layer is randomly distributed at x degrees (x is not equal to 0). The rest of the preparation is the same as in example 1.
Example 4
Unlike example 1, in the preparation process of the bionic laminated composite structure of this example, the layering sequence set from top to bottom is as follows: 1 layer of T800 carbon fiber prepreg cloth, 10 layers of ultra-high molecular weight polyethylene fiber prepreg cloth, 1 layer of T700 carbon fiber prepreg cloth, 20 layers of ultra-high molecular weight polyethylene fiber prepreg cloth, 1 layer of T600 carbon fiber prepreg cloth and 30 layers of ultra-high molecular weight polyethylene fiber prepreg cloth; in the layering process, the fiber yarn direction of each adjacent carbon fiber layer is ensured to be distributed at 90 degrees, and the direction of the ultra-high molecular weight polyethylene fiber yarn of each adjacent layer is randomly distributed at x degrees (x is not equal to 0). The rest of the preparation is the same as in example 1.
Example 5
Unlike example 1, the mixing ratio of phenolic resin, epoxy resin and polyurethane in the preparation of the T600, T700 and T800 carbon fiber prepregs is as follows: 1:6:1. The rest of the preparation is the same as in example 1.
Example 6
Unlike example 1, the mixing ratio of phenolic resin, epoxy resin, polyurethane at the time of preparation of the high molecular weight polyethylene fiber prepreg was: 1:2:7. The rest of the preparation is the same as in example 1.
The performance test was performed and the test data are shown in table 1.
| Test item | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Thickness of (L) | 3.14mm | 3.11mm | 3.41mm | 3.75mm | 3.20mm | 3.17mm |
| Areal density of | 3.25kg/m 2 | 3.19kg/m 2 | 3.34kg/m 2 | 3.96kg/m 2 | 3.21kg/m 2 | 3.18kg/m 2 |
| V50 | 604m/s | 599m/s | 568m/s | 651m/s | 575m/s | 593m/s |
From the above data, it can be seen that, in examples 1, 2 and 4, carbon fibers with different intensities are used in combination with ultra-high molecular weight polyethylene fibers with different layers to form gradient change in structure, so that impact energy of a bullet is uniformly dispersed in a buffer manner, the anti-elastic performance of the bullet is effectively improved, and meanwhile, an excellent light weight level can be ensured. It can be seen from examples 5 and 6 that the final impregnated fibrous layer thickness was slightly changed due to the change in the ratio of the impregnating blend resin, the areal density was reduced, but there could be a slight reduction in V50.
Example 7
Unlike example 1, in the preparation process of the bionic laminated composite structure of this example, the layering sequence set from top to bottom is as follows: 1 layer of T800 carbon fiber prepreg cloth+10 layers of ultra-high molecular weight polyethylene fiber prepreg cloth+1 layer of T700 carbon fiber prepreg cloth+11 layers of ultra-high molecular weight polyethylene fiber prepreg cloth+1 layer of T600 carbon fiber prepreg cloth+12 layers of ultra-high molecular weight polyethylene fiber prepreg cloth+1 layer of T800 carbon fiber prepreg cloth+13 layers of ultra-high molecular weight polyethylene fiber prepreg cloth+1 layer of T700 carbon fiber prepreg cloth+14 layers of ultra-high molecular weight polyethylene fiber prepreg cloth+1 layer of T600 carbon fiber prepreg cloth+15 layers of ultra-high molecular weight polyethylene fiber prepreg cloth+1 layer of T800 carbon fiber prepreg cloth+16 layers of ultra-high molecular weight polyethylene fiber prepreg cloth+1 layer of T700 carbon fiber prepreg cloth+17 layers of ultra-high molecular weight polyethylene fiber prepreg cloth, the fiber filament direction of each adjacent carbon fiber layer is ensured to be distributed at 90 degrees in the layering process, and the direction of ultra-high molecular weight polyethylene fiber filaments of each adjacent layer is distributed at random x degrees (x 0). The rest of the preparation is the same as in example 1.
The bending strength of the backboard with the bionic laminated structure prepared in the embodiment is more than 90MPa, the Shore hardness value is more than 80Shore D, and the impact toughness is more than 20kN.
Comparative example 1
Unlike example 7, the carbon fiber material was replaced with aramid fiber, and the remaining steps were unchanged.
Comparative example 2
Unlike example 7, the material compounding process was directly warmed to 110 ℃, incubated for 60min, while a pressure of 12MPa was directly applied during the warming process, with the pressure continuing until compounding ended.
The bionic laminated structure bulletproof back plates prepared in example 7, comparative example 1 and comparative example 2 were subjected to V50 performance test, and were respectively compounded with 9.5mm thick boron carbide ceramics, and subjected to 53-type 7.62mm flick test, and the test results are shown in Table 2.
Table 2:
according to different practical application conditions, the anti-elasticity performance of the fiber can be increased by superposing 1 layer of carbon fiber prepreg cloth and n layers of ultra-high molecular weight polyethylene fiber prepreg cloth modules.
From the test results of example 7, comparative example 1 and comparative example 2, it is known that the bulletproof back plate with the bionic laminated structure prepared by adopting the specific lamination of the hard carbon fiber and the soft ultra-high molecular weight polyethylene fiber and the composite process of combining the special temperature and the special pressure has excellent bulletproof performance, and simultaneously ensures excellent light weight level, while the bulletproof material with excellent bulletproof performance still cannot be obtained by adopting other hard materials to replace the carbon fiber and combining the process of the invention, and has lower light weight level.
Example 8
The preparation method of the bulletproof backboard with the bionic laminated structure comprises the following steps:
s1, preparing a carbon fiber prepreg:
s1.1, mixing phenolic resin, epoxy resin and polyurethane according to the mass ratio of 1:5:1.5, adding acetone, stirring for 10min at 100rpm, and diluting to mixed resin 1 with the mass percentage concentration of 80%;
s1.2, impregnating the carbon fiber by adopting the mixed resin 1 prepared in the S1.1, wherein the impregnating temperature is 95 ℃, the impregnating time is 10min, the impregnated carbon fiber is dried for 6min at 45 ℃, and the mass ratio of the resin content is controlled to be 10% by adopting an extrusion roller;
s2, preparation of polyethylene fiber prepreg
S2.1, mixing phenolic resin, epoxy resin and polyurethane according to the mass ratio of 1:1:7, adding acetone, stirring for 15min at 100rpm, and diluting to mixed resin 2 with the mass percentage concentration of 85% for later use;
s2.2, adopting the step S2.1 to prepare mixed resin 2 to impregnate the ultra-high molecular weight polyethylene fiber, wherein the temperature is 80 ℃, the impregnation is carried out for 10min, the impregnation is carried out for 6min at 45 ℃, and the mass ratio of the resin content is controlled to be 5% by adopting an extrusion roller;
s3, preparation of bionic laminated composite structure
S3.1, the composite layering structure is that 1 layer of T800 carbon fiber prepreg cloth and 10 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 1,1 layer of T700 carbon fiber prepreg cloth and 11 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 2,1 layer of T600 carbon fiber prepreg cloth and 15 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 3 from top to bottom, the fiber filament directions of the carbon fiber prepreg cloth in adjacent modules are distributed at 90 degrees, and the fiber filament directions of the ultra-high molecular weight polyethylene of the adjacent layers are not at 0 degrees;
s3.2, carrying out warm-pressing compounding on the paved composite pavement structure, heating to 90 ℃ at a heating rate of 1 ℃/min in the compounding process, preserving heat for 10min, then heating to 110 ℃ at a heating rate of 0.5 ℃/min, preserving heat for 40min, naturally cooling, and when heating to 55min, heating to 11MPa at a heating rate of 0.1MPa/min, and continuing until cooling is finished.
Example 9
The preparation method of the bulletproof backboard with the bionic laminated structure comprises the following steps:
s1, preparing a carbon fiber prepreg:
s1.1, mixing phenolic resin, epoxy resin and polyurethane according to the mass ratio of 0.5:6:5, adding acetone, stirring for 15min at 150rpm, and diluting to mixed resin 1 with the mass percentage concentration of 80%;
s1.2, impregnating the carbon fiber by adopting the mixed resin 1 prepared in the S1.1, wherein the impregnating temperature is 100 ℃, the impregnating time is 5min, the impregnated carbon fiber is dried for 4min at 50 ℃, and the mass ratio of the resin content is controlled to be 6% by adopting an extrusion roller;
s2, preparation of polyethylene fiber prepreg
S2.1, mixing phenolic resin, epoxy resin and polyurethane according to the mass ratio of 1:1:3, adding acetone, stirring for 10min at 150rpm, and diluting to mixed resin 2 with the mass percentage concentration of 95% for later use;
s2.2, adopting the step S2.1 to prepare mixed resin 2 to impregnate the ultra-high molecular weight polyethylene fiber, wherein the temperature is 85 ℃, the impregnation is carried out for 5min, the impregnation is carried out for 6min at 45 ℃, and the mass ratio of the resin content is controlled to be 3% by adopting an extrusion roller;
s3, preparation of bionic laminated composite structure
S3.1, the composite layering structure is that 1 layer of T800 carbon fiber prepreg cloth and 10 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 1,1 layer of T700 carbon fiber prepreg cloth and 11 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 2,1 layer of T600 carbon fiber prepreg cloth and 15 layers of ultra-high molecular weight polyethylene fiber prepreg cloth form a module 3 from top to bottom, the fiber filament directions of the carbon fiber prepreg cloth in adjacent modules are distributed at 90 degrees, and the fiber filament directions of the ultra-high molecular weight polyethylene of the adjacent layers are not at 0 degrees;
s3.2, carrying out warm-pressing compounding on the paved composite pavement structure, heating to 90 ℃ at a heating rate of 2 ℃/min in the compounding process, preserving heat for 10min, then heating to 110 ℃ at a heating rate of 0.5 ℃/min, preserving heat for 40min, naturally cooling, and when heating for 60min, heating to 15MPa at a heating rate of 0.5MPa/min, and continuing until cooling is finished.
Claims (7)
1. A bulletproof backboard with a bionic laminated structure is characterized in that: the back plate is composed of carbon fiber layers and polyethylene fiber layers, and is characterized in that n layers of polyethylene fiber layers are overlapped under a single-layer carbon fiber layer to form a module, n is 10-30, fiber filament directions between two adjacent polyethylene fiber layers are distributed in x degrees, x is not equal to 0, a plurality of modules are overlapped and compounded, fiber filament directions of the carbon fiber layers in the adjacent modules are distributed in 90 degrees, the number of overlapped modules is not less than 3, the carbon fibers in the bulletproof back plate are sequentially T800 carbon fibers, T700 carbon fibers and T600 carbon fibers in the modules from top to bottom to circulate, and the number of layers of the ultrahigh molecular weight polyethylene fiber layers in the modules from top to bottom is sequentially increased.
2. The ballistic resistant backsheet of a biomimetic laminated structure of claim 1 wherein: the carbon fiber layer is prepared by prepreg treatment of carbon fibers through phenolic resin, epoxy resin and polyurethane, and the polyethylene fiber layer is prepared by prepreg treatment of polyethylene fibers through phenolic resin, epoxy resin and polyurethane.
3. A method for preparing the bulletproof back plate with the bionic laminated structure as claimed in claim 2, which is characterized in that: the method comprises the steps of impregnating carbon fibers by adopting a mixed resin 1 formed by phenolic resin, epoxy resin and polyurethane to form a carbon fiber layer, impregnating high molecular weight polyethylene fibers by adopting a mixed resin 2 formed by phenolic resin, epoxy resin and polyurethane to form a polyethylene fiber layer, forming a module by 1 layer of carbon fiber layer and n layers of polyethylene fiber layers, superposing more than 3 modules to form a composite layering structure, then carrying out warm-pressing compounding, specifically carrying out heat preservation at 90 ℃ for 5-15 min, then carrying out heat preservation at 110 ℃ for 30-60 min, then carrying out natural cooling, stabilizing the pressure at 11-15 MPa, and continuing until cooling is finished.
4. A method of preparation as claimed in claim 3, wherein: the temperature and pressure compounding is to heat up to 90 ℃ at a heating rate of 1-2 ℃/min, heat up to 5-15 min, heat up to 110 ℃ at a heating rate of 0.5-1 ℃/min, heat up to 30-60 min, natural cooling, and when the heating rate is 50-60 min, the pressure starts to heat up to 11-15 MPa at a heating rate of 0.1-0.5 MPa/min, and the cooling is continued until the end.
5. The method of claim 3 or 4, wherein: in the mixed resin 1, phenolic resin, epoxy resin and polyurethane are mixed according to the mass ratio of 0.5-1:5-6:1.5-2, and are diluted to the mass percentage concentration range of 80% -90% by using acetone.
6. The method of claim 3 or 4, wherein: in the mixed resin 2, phenolic resin, epoxy resin and polyurethane are mixed according to the mass ratio of 1-2:1-2:6-8, and are diluted to the mass percentage concentration range of 85% -95% by using acetone.
7. The method of manufacturing according to claim 5, wherein: in the mixed resin 2, phenolic resin, epoxy resin and polyurethane are mixed according to the mass ratio of 1-2:1-2:6-8, and are diluted to the mass percentage concentration range of 85% -95% by using acetone.
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| WO2014201656A1 (en) * | 2013-06-20 | 2014-12-24 | 郑州中远防务材料有限公司 | Non-weft cloth, manufacturing method therefor, and non-weft cloth product |
| CN205448840U (en) * | 2015-12-11 | 2016-08-10 | 烟台泰和新材料股份有限公司 | Bulletproof composite material |
| CN206459566U (en) * | 2017-01-16 | 2017-09-01 | 江苏安卡新材料科技有限公司 | A kind of bulletproof composite sheet material |
| CN109795132A (en) * | 2017-11-16 | 2019-05-24 | 连云港神鹰复合材料科技有限公司 | A kind of preparation method of bulletproof halmet |
| CN207556366U (en) * | 2017-11-27 | 2018-06-29 | 北京威亚高性能纤维有限公司 | A kind of ballistic structure |
-
2021
- 2021-09-23 CN CN202111111643.XA patent/CN113834384B/en active Active
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