A bionic protective structure based on animal scales and preparation method thereof

Abstract

The present invention provides a bionic protective structure based on animal scales and a preparation method, which belongs to the field of personal protection, and aims to solve the problems of heavy structure and insufficient protection ability of existing personal protective equipment. The bionic protective structure based on animal scales is a multi-layer composite gradient structure, including a hard scale layer and a soft base layer. The hard scale layer is composed of a hard scale base and scale blocks; the hard scale base is composed of carbon fiber woven cloth; the scale blocks are composed of periodic arrangement of magnesium-aluminum alloy blocks; the soft base layer is composed of aramid non-woven cloth; the hard scale layer and the soft base layer are initially bonded with an adhesive, and are pressed using a hot pressing composite process. The preparation process of the present invention is simple and easy, does not require complex equipment, and the obtained protective structure sample has good protection ability.

Description

Technical Field

[0001] The invention relates to a bionic protective structure based on animal scales and a preparation method thereof, belonging to the field of individual protection. Background Art

[0002] With the rapid development of society and the intensification of regional conflicts, terrorist attacks have emerged in endlessly, and individual protective equipment is facing unprecedented challenges, which puts forward new requirements for the mobility and flexibility of protective equipment. Traditional protective equipment with only simple protective performance can no longer meet the needs of individual combat, and the research and development of lightweight protective equipment with both flexibility and defense is imminent. The natural armor system of organisms has always been a benchmark for humans to emulate in the development of new flexible armor. More than 2,000 years ago, the ancient Scythians had already conducted research on scale-like armor, and used small-sized scales in curved areas such as elbows and shoulders, and large-sized scales in important areas of the torso to provide good protection and flexibility. The flexible natural armor of animals such as fish, alligators, snakes, pangolins, armadillos, etc. has attracted more and more attention due to its unique combination of hardness, flexibility and light weight. However, the early bionic protective structure was thick and heavy, with low protective efficiency, and the overall wearing structure caused great trouble to the wearer; and although the improved splicing structure improved the wearing efficiency and reduced the weight, the splicing gaps were weak points, and the local bullet damage effect would have a serious impact on the surrounding structures.

[0003] Therefore, in view of the defects and shortcomings in the development of personal protective equipment structures, the present invention provides a bionic protective structure based on animal scales and a preparation method. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of heavy structure and insufficient protective ability of existing personal protective equipment, and to provide a bionic protective structure based on animal scales and a preparation method. The structure is a multi-layer composite gradient structure with a simple and easy preparation process, and the obtained protective structure sample has good protective ability.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A bionic protective structure based on animal scales and a preparation method, the specific steps are as follows:

[0007] Step 1: Cut the carbon fiber woven fabric into 100 mm x 100 mm carbon fiber square fabrics, and use adhesive A to bond 2 to 3 layers of carbon fiber square fabrics to obtain a hard scale base;

[0008] The carbon fiber is any one of carbon fiber T300 or carbon fiber T700;

[0009] The adhesive A is a mixture of polyurethane and talcum powder, wherein the talcum powder has a particle size of 3000 meshes and a mass fraction of 0.3% to 0.5%.

[0010] Step 2: Cut the magnesium-aluminum alloy with a thickness of 2 mm into 10 mm x 10 mm scale blocks, evenly lay them on the hard scale base obtained in step 1, and use adhesive A to bond the upper 3 mm area of ​​the scale blocks to the hard scale base; after the first row of scale blocks are bonded to the hard scale base, lift the lower part of the first row of scale blocks, and place the second row of scale blocks thereunder, with the upper part of the second row of scale blocks overlapping the lower part of the first row of scale blocks by 2 mm, and then use adhesive A to bond the second row of scale blocks to the hard scale base; then repeat the laying and bonding operations until the hard scale base is covered with scale blocks to obtain a hard scale layer;

[0011] The magnesium-aluminum alloy is any one of magnesium-aluminum alloy 5052, magnesium-aluminum alloy 5083 or magnesium-aluminum alloy 5754.

[0012] Step 3: Cut the aramid non-woven fabric into 100 mm x 100 mm aramid square fabrics, and lay them in layers according to the conventional 0° / 90° method, with the number of layers being 6 to 12; use adhesive B to bond the aramid square fabric layers to obtain a soft base layer;

[0013] The adhesive B is a mixture of polyurethane and white carbon black, wherein the white carbon black has a particle size of 2000 meshes and a mass fraction of 0.3% to 0.5%.

[0014] Step 4: Use adhesive C to bond the hard scale layer obtained in step 2 and the soft base layer obtained in step 3. After standing for 2 hours, put it into a hot press for compounding for 10 to 20 minutes at a temperature of 80 to 100°C to obtain a bionic protective structure sample based on animal scales.

[0015] The adhesive C is a mixture of polyurethane and carbon nanotubes, wherein the diameter of the carbon nanotubes is 2-5 nm and the mass fraction is 0.3%-0.5%.

[0016] Beneficial Effects

[0017] 1. The present invention provides a bionic protective structure based on animal scales and a preparation method thereof. The structure adopts a gradient design to maximize the protective capabilities of carbon fiber, magnesium-aluminum alloy and aramid fiber, while reducing the thickness and weight of the protective sample, while ensuring the impact resistance and puncture resistance of the sample, and having sufficient softness, thereby improving wearing comfort;

[0018] 2. The present invention provides a bionic protective structure based on animal scales and a preparation method thereof, which further ensures wearing comfort and reduces production costs by connecting hard scale materials with soft base materials using an adhesive and compounding them using a hot pressing process;

[0019] 3. The bionic protective structure based on animal scales and its preparation method provided by the present invention do not generate pollutants such as three wastes during the production and preparation process, do not require complex production equipment, are suitable for large-scale industrial production, and better adapt to the needs of the international market. DETAILED DESCRIPTION

[0020] The present invention will be further described below through specific embodiments:

[0021] Example 1

[0022] The T300 carbon fiber woven fabric was cut into 100 mm x 100 mm carbon fiber square cloths, and two layers of carbon fiber square cloths were bonded using adhesive A with a talcum powder mass fraction of 0.4% to obtain a hard scale substrate; then the magnesium aluminum alloy 5083 with a thickness of 2 mm was cut into 10 mm x 10mm scale blocks are evenly laid on the hard scale base, and the above-mentioned adhesive A is used to bond the upper 3mm area of ​​the scale blocks to the hard scale base; after the first row of scale blocks are bonded to the hard scale base, the lower part of the first row of scale blocks is raised, and the second row of scale blocks is placed thereunder, and the upper part of the second row of scale blocks overlaps the lower part of the first row of scale blocks by 2mm, and then the second row of scale blocks is bonded to the hard scale base using adhesive A; then the laying and bonding operations are repeated until the hard scale base is covered with scale blocks to obtain a hard scale layer; the aramid non-woven fabric is cut into 100mm x 100mm aramid cloth was laid at 0° / 90° with 8 layers. The aramid cloth layers were bonded with adhesive B with a white carbon black mass fraction of 0.3% to obtain a soft base layer. Then, adhesive C with a carbon nanotube mass fraction of 0.5% was used to bond the hard scale layer to the soft base layer. The carbon nanotube had a diameter of 3nm. After standing for 2h, it was put into a hot press for compounding for 15min at a temperature of 80℃ to obtain a bionic protective structure sample based on animal scales.

[0023] After testing, the surface density of the bionic protective structure sample based on animal scales is 11.3kg / m 2 The bionic protective structure sample was impacted with an impact energy of 120J, and the standard clay indentation depth was 16mm; the bionic protective structure sample was punctured with an energy of 24J, and the sample did not penetrate.

[0024] Example 2

[0025] The T700 carbon fiber woven fabric was cut into 100 mm x 100 mm carbon fiber square cloths, and three layers of carbon fiber square cloths were bonded using adhesive A with a talcum powder mass fraction of 0.3% to obtain a hard scale substrate; then the magnesium aluminum alloy 5052 with a thickness of 2 mm was cut into 10 mm x 10mm scale blocks are evenly laid on the hard scale base, and the above-mentioned adhesive A is used to bond the upper 3mm area of ​​the scale blocks to the hard scale base; after the first row of scale blocks are bonded to the hard scale base, the lower part of the first row of scale blocks is raised, and the second row of scale blocks is placed thereunder, and the upper part of the second row of scale blocks overlaps the lower part of the first row of scale blocks by 2mm, and then the second row of scale blocks is bonded to the hard scale base using adhesive A; then the laying and bonding operations are repeated until the hard scale base is covered with scale blocks to obtain a hard scale layer; the aramid non-woven fabric is cut into 100mm x 100mm aramid square cloth is laid at 0° / 90°, with 10 layers; the aramid square cloth layers are bonded to each other using adhesive B with a white carbon black mass fraction of 0.5% to obtain a soft base layer; then the hard scale layer is bonded to the soft base layer using adhesive C with a carbon nanotube mass fraction of 0.4%, with a carbon nanotube diameter of 5nm. After standing for 2h, it is placed in a hot press for compounding for 18min at a temperature of 100℃ to obtain a bionic protective structure sample based on animal scales.

[0026] After testing, the surface density of the bionic protective structure sample based on animal scales is 11.5kg / m 2 The bionic protective structure sample was impacted with an impact energy of 120J, and the standard clay indentation depth was 17mm; the bionic protective structure sample was punctured with an energy of 24J, and the sample did not penetrate.

[0027] Example 3

[0028] The T700 carbon fiber woven fabric was cut into 100 mm x 100 mm carbon fiber square cloths, and two layers of carbon fiber square cloths were bonded using adhesive A with a talcum powder mass fraction of 0.5% to obtain a hard scale substrate; then the magnesium aluminum alloy 5754 with a thickness of 2 mm was cut into 10 mm x 10mm scale blocks are evenly laid on the hard scale base, and the above-mentioned adhesive A is used to bond the upper 3mm area of ​​the scale blocks to the hard scale base; after the first row of scale blocks are bonded to the hard scale base, the lower part of the first row of scale blocks is raised, and the second row of scale blocks is placed thereunder, and the upper part of the second row of scale blocks overlaps the lower part of the first row of scale blocks by 2mm, and then the second row of scale blocks is bonded to the hard scale base using adhesive A; then the laying and bonding operations are repeated until the hard scale base is covered with scale blocks to obtain a hard scale layer; the aramid non-woven fabric is cut into 100mm x 100mm aramid cloth is laid at 0° / 90°, with 12 layers. The aramid cloth layers are bonded to each other using adhesive B with a silica mass fraction of 0.4% to obtain a soft base layer. Then, adhesive C with a carbon nanotube mass fraction of 0.3% is used to bond the hard scale layer to the soft base layer. The carbon nanotube has a diameter of 2nm. After standing for 2h, it is placed in a hot press for compounding for 20min at a temperature of 90°C to obtain a bionic protective structure sample based on animal scales.

[0029] After testing, the surface density of the bionic protective structure sample based on animal scales is 11.6kg / m 2 The bionic protective structure sample was impacted with an impact energy of 120J, and the standard clay indentation depth was 14mm; the bionic protective structure sample was punctured with an energy of 24J, and the sample did not penetrate.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bionic protective structure based on animal scales, characterized in that: It includes hard scale layer and soft base layer; The hard scale layer is composed of a hard scale base and scale blocks; the hard scale base is composed of carbon fiber woven fabric; the scale blocks are composed of magnesium-aluminum alloy blocks arranged periodically; Further, the carbon fiber is any one of carbon fiber T300 or carbon fiber T700; Further, the magnesium-aluminum alloy is any one of magnesium-aluminum alloy 5052, magnesium-aluminum alloy 5083 or magnesium-aluminum alloy 5754; The soft base layer is formed by stacking multiple layers of aramid non-woven fabrics; The scale blocks formed by periodically paving the magnesium-aluminum alloy blocks are such that the lower part of the scale blocks in the first row needs to be lifted for the second row and placed thereunder, and the upper part of the scale blocks in the second row overlaps the lower part of the scale blocks in the first row by 2 mm, and then the scale blocks in the second row are bonded to the hard scale base using adhesive A; and then the paving and bonding operations are repeated until the hard scale base is covered with scale blocks to obtain a hard scale layer; The carbon fiber woven fabric hard scale base and the magnesium aluminum alloy scale block are bonded using adhesive A; The adhesive A is a mixture of polyurethane and talcum powder, wherein the talcum powder has a particle size of 3000 mesh and a mass fraction of 0.3% to 0.5%; The aramid non-woven fabric is cut into 100 mm x 100 mm aramid square fabrics and laid in a conventional 0° / 90° pattern with 6 to 12 layers; the aramid square fabric layers are bonded to each other using adhesive B; The adhesive B is a mixture of polyurethane and white carbon black, wherein the white carbon black particle size is 2000 mesh and the mass fraction is 0.3% to 0.5%; The hard scale layer and the soft base layer need to be bonded with adhesive C, and after standing for 2 hours, they are placed in a hot press for compounding for 10 to 20 minutes at a temperature of 80 to 100°C, thereby obtaining a bionic protective structure sample based on animal scales; The adhesive C is a mixture of polyurethane and carbon nanotubes, wherein the diameter of the carbon nanotubes is 2 to 5 nm and the mass fraction is 0.3% to 0.5%.