阅读说明：本技术 一种防弹陶瓷/芳纶ⅲ复合装甲用树脂及其制备方法 (Resin for bulletproof ceramic/aramid III composite armor and preparation method thereof ) 是由 赵友平 钟成友 于 2020-12-10 设计创作，主要内容包括：本发明公开一种防弹陶瓷/芳纶Ⅲ复合装甲用树脂,所述防弹陶瓷/芳纶Ⅲ复合装甲用树脂包括环氧树脂、聚氨酯树脂、芳纶Ⅲ微纤以及丙酮；环氧树脂、聚氨酯树脂、芳纶Ⅲ微纤、丙酮质量比为：1:0.08～0.15：0.12～0.20：0.20～0.30。以及制备该防弹陶瓷/芳纶Ⅲ复合装甲用树脂的方法,该防弹陶瓷/芳纶Ⅲ复合装甲用树脂用以提升环氧树脂的强度和韧性,最终达到提高陶瓷与芳纶Ⅲ复合材料间的抗剥离强度和抗冲击强度,有效保证复合装甲的抗多发能力。(The invention discloses a resin for bulletproof ceramic/aramid III composite armor, which comprises epoxy resin, polyurethane resin, aramid III microfiber and acetone; the mass ratio of the epoxy resin, the polyurethane resin, the aramid fiber III microfiber and the acetone is as follows: 1: 0.08-0.15: 0.12-0.20: 0.20 to 0.30. The resin for the bulletproof ceramic/aramid III composite armor is used for improving the strength and toughness of epoxy resin, finally achieves the purposes of improving the anti-peeling strength and the impact strength between the ceramic and aramid III composite materials, and effectively ensures the multi-shot resistance of the composite armor.)

1. The resin for the bulletproof ceramic/aramid III composite armor is characterized by comprising epoxy resin, polyurethane resin, aramid III microfiber and acetone; the mass ratio of the epoxy resin, the polyurethane resin, the aramid fiber III microfiber and the acetone is as follows: 1: 0.08-0.15: 0.12-0.20: 0.20 to 0.30.

2. The resin for a bulletproof ceramic/aramid iii composite armor according to claim 1, wherein the epoxy resin is designated as E51.

3. The resin for bulletproof ceramic/aramid iii composite armor according to claim 1, wherein the polyurethane resin is PU-3332.

4. The resin for the bulletproof ceramic/aramid III composite armor according to claim 1, wherein the diameter of the aramid III microfiber is 30-50 μm.

5. The resin for the bulletproof ceramic/aramid III composite armor according to claim 1, wherein the purity of acetone is not less than 99.9%.

6. The method of preparing a resin for a ballistic resistant ceramic/aramid iii composite armor according to any one of claims 1-5, comprising the following operative steps:

s1, controlling the environment temperature at 20-25 ℃ and the air humidity at 50-65%; simultaneously adding epoxy resin and polyurethane resin into a reaction kettle, stirring for 3-5 minutes in the reaction kettle at a rotating speed of 80-100 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction;

s2, after the mixture reacts stably, adding acetone into the reaction kettle, stirring for 3-5 minutes in the reaction kettle at a rotating speed of 80-100 revolutions per minute by using a stirrer, and stirring the mixture uniformly and fully to react;

s3, after the mixture reacts stably, finally adding aramid fiber III microfiber, stirring the mixture in a reaction kettle for 3-5 minutes at a rotating speed of 80-100 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction; and after the mixture reacts stably, the resin for the bulletproof ceramic/aramid III composite armor is obtained.

Technical Field

The invention belongs to the fields of high polymer materials and armor protection, and particularly relates to a preparation method of modified epoxy resin for a ceramic-based aramid III composite armor.

Background

In modern war, tank, war chariot, reconnaissance car, delivery wagon, armed helicopter etc. not only require to have characteristics such as lightweight, high mobility, structural function integration, but also must possess good barrier propterty, and anti multiple ability reinforce to improve battlefield viability.

In order to meet the requirements of light weight and armor protection of weaponry, a series of light composite armors which are compounded by bulletproof ceramics and reinforced fiber materials are provided at home and abroad, and the reinforced fiber materials comprise aramid fiber materials (such as Kevlar), ultra-high molecular weight polyethylene materials, glass fibers and the like. Aramid fiber has excellent performances such as light weight, high strength, impact resistance, high and low temperature resistance, corrosion resistance, fatigue resistance, high flame retardance and the like, so that the aramid fiber is widely applied, such as American military M117 armored tanks, M1A2 main warfare tanks, Japanese 90-type tanks, Russian T90 main warfare tanks and the like, which use a large amount of aramid fiber composite materials, and the usage amount of the aramid fiber composite materials generally accounts for 30-50% of the total weight of a vehicle body structure.

The resistance to multiple attacks is always a great problem which besets armor protection, and the bonding strength between the bulletproof ceramic and the reinforced fiber composite material and the structural stability after impact are key points of whether multiple attacks can be resisted or not. In China, the bulletproof ceramic and aramid composite material is usually bonded by using epoxy resin, the epoxy resin has the advantages of strong bonding force, low shrinkage rate, good stability and the like, but the composite armor has weak multi-shot resistance due to brittleness, insufficient toughness and poor impact resistance, and the application of the ceramic-based aramid composite armor in weaponry is severely restricted.

Disclosure of Invention

The technical problem solved by the invention is as follows: the resin for the bulletproof ceramic/aramid III composite armor and the preparation method thereof are provided, and are used for improving the strength and toughness of epoxy resin, finally achieving the purposes of improving the anti-peeling strength and the anti-impact strength between the ceramic and aramid III composite materials and effectively ensuring the multi-shot resistance of the composite armor.

The technical scheme adopted by the invention is as follows:

a resin for bulletproof ceramic/aramid III composite armor comprises epoxy resin, polyurethane resin, aramid III microfiber and acetone; the mass ratio of the epoxy resin, the polyurethane resin, the aramid fiber III microfiber and the acetone is as follows: 1: 0.08-0.15: 0.12-0.20: 0.20 to 0.30.

Preferably, the epoxy resin is available under the designation E51.

Preferably, the polyurethane resin is available under the brand name PU-3332.

Preferably, the diameter of the aramid III microfiber is 30-50 microns.

Preferably, the purity of the acetone is more than or equal to 99.9 percent.

The introduction of polyurethane resin is to toughen epoxy resin, the addition of aramid III microfiber is to strengthen resin and improve the affinity of the aramid III microfiber with aramid III composite material, and acetone is used as a diluent to facilitate process control. The acetone is used as a diluent, so that the epoxy resin, the polyurethane resin and the aramid III microfiber can be fully fused and do not react with the substances. And other organic solvents are not fully fused as diluents, so that the toughness and strength of the prepared modified epoxy resin are not ideal.

A preparation method of resin for bulletproof ceramic/aramid III composite armor comprises the following operation steps:

s1, controlling the environment temperature at 20-25 ℃ and the air humidity at 50-65%; simultaneously adding epoxy resin and polyurethane resin into a reaction kettle, stirring for 3-5 minutes in the reaction kettle at a rotating speed of 80-100 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction;

s2, after the mixture reacts stably, adding acetone into the reaction kettle, stirring for 3-5 minutes in the reaction kettle at a rotating speed of 80-100 revolutions per minute by using a stirrer, and stirring the mixture uniformly and fully to react;

s3, after the mixture reacts stably, finally adding aramid fiber III microfiber, stirring the mixture in a reaction kettle for 3-5 minutes at a rotating speed of 80-100 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction; and after the mixture reacts stably, the modified epoxy resin is prepared.

Detailed Description

The present invention is further illustrated by the following description and examples, including but not limited to the following examples.

The embodiment of the invention provides a resin for a bulletproof ceramic/aramid III composite armor and a preparation method thereof, which are used for improving the strength and toughness of epoxy resin, finally achieving the purposes of improving the peeling strength and impact strength between ceramic and aramid III composite materials and effectively ensuring the multi-shot resistance of the composite armor.

Example 1

The preparation method of the resin for the bulletproof ceramic/aramid III composite armor comprises the following specific operations:

s1, controlling the environment temperature at 20-25 ℃ and the air humidity at 50-65%; 1Kg of epoxy resin and 0.08Kg of polyurethane resin are added into a reaction kettle at the same time, and the mixture is stirred in the reaction kettle for 3 minutes at the rotating speed of 80 revolutions per minute by using a stirrer, and is stirred uniformly and fully reacted.

And S2, after the mixture reacts stably, adding 0.20Kg of acetone into the reaction kettle, stirring the mixture in the reaction kettle for 3 minutes at the rotating speed of 80 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction.

And S3, after the mixture reacts stably, finally adding 0.12Kg of aramid III microfiber, stirring the mixture in a reaction kettle for 3 minutes at a rotating speed of 80 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction. And after the mixture reacts stably, the modified epoxy resin is prepared.

Further, performing performance test comparison on the epoxy resin before and after modification, and preparing 10 pairs of samples;

random sample 5 pairs were tested for performance: adhesive 180 DEG peel strength test method GB/T2790-; the simple beam type impact toughness test method for fiber reinforced plastics GB/T1451-; the data are shown in Table 1;

TABLE 1 Performance data for sample groups

Further, the epoxy resin before and after modification is used for bonding the ceramic/aramid III composite armor, and multiple shot-resistant bulletproof performance test and comparison are carried out, in 5 randomly sampled tests, a sample target adopting modified epoxy can prevent more than 3 shots within the range of 400mm multiplied by 400 mm; while the use of unmodified epoxy can only prevent a projectile.

Example 2

The preparation method of the resin for the bulletproof ceramic/aramid III composite armor comprises the following specific operations:

s1, controlling the environment temperature at 20-25 ℃ and the air humidity at 50-65%; 1Kg of epoxy resin and 0.15Kg of polyurethane resin are added into a reaction kettle at the same time, and the mixture is stirred in the reaction kettle for 5 minutes at the rotating speed of 100 revolutions per minute by using a stirrer, and is stirred uniformly and fully reacted.

And S2, after the mixture reacts stably, adding 0.30Kg of acetone into the reaction kettle, stirring the mixture in the reaction kettle for 5 minutes at the rotating speed of 100 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction.

And S3, after the mixture reacts stably, finally adding 0.20Kg of aramid III microfiber, stirring the mixture in a reaction kettle for 5 minutes at the rotating speed of 100 revolutions per minute by using a stirrer, and uniformly stirring the mixture for full reaction. And after the mixture reacts stably, the modified epoxy resin is prepared.

Further, performing performance test comparison on the epoxy resin before and after modification, and preparing 10 pairs of samples;

random sample 5 pairs were tested for performance: adhesive 180 DEG peel strength test method GB/T2790-; the simple beam type impact toughness test method for fiber reinforced plastics GB/T1451-; the data are shown in Table 2;

further, the epoxy resin before and after modification is used for bonding the ceramic/aramid III composite armor, and multiple shot-resistant bulletproof performance test and comparison are carried out, in 5 randomly sampled tests, a sample target adopting modified epoxy can prevent more than 3 shots within the range of 400mm multiplied by 400 mm; while the use of unmodified epoxy can only prevent a projectile.

As can be seen from the data in tables 1-2, the preparation method of the modified epoxy resin provided by the invention finally achieves the purpose of improving the anti-peeling strength and the anti-impact strength between the ceramic and aramid III composite materials, and can effectively ensure the multi-shot resistance of the composite armor.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.