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Low-cost high-strength flexible protective material and preparation method thereof

A technology of flexible protection and protective materials, which is applied in the direction of protective equipment, personnel protection equipment, offensive equipment, etc., can solve the problems of the influence of material flexibility and reduce wearing comfort, and achieve improved flexibility, excellent anti-stab and anti-ballistic performance, and wearable comfortable effect

Inactive Publication Date: 2014-05-21
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the protective effect of the material still needs to be further improved. At the same time, as the number of impregnated layers increases, the flexibility of the material will be affected and the wearing comfort will be reduced.

Method used

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  • Low-cost high-strength flexible protective material and preparation method thereof
  • Low-cost high-strength flexible protective material and preparation method thereof
  • Low-cost high-strength flexible protective material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] SiO 2 Preparation of Nanoparticles: Preparation of Nano-SiO by Stober Method 2 According to the volume ratio of 1:2:2, configure the mixed solution of tetraethyl orthosilicate, absolute ethanol, and deionized water, put it into the reactor, and stir it evenly in a constant temperature water bath at 70°C, and then add it drop by drop Appropriate amount of ammonia water, adjust the pH to 9, so that the two solutions are fully mixed and reacted in the reactor to obtain a suspension of silica nanospheres, the suspension is cooled, washed by centrifugation, and placed in a vacuum drying oven at 80°C The solvent is removed by drying, and finally the obtained product is calcined in a resistance furnace for 1-2 hours.

[0029] SiO 2 Nanoparticle surface graft modification: mix 95% absolute ethanol and 5% deionized water, add 2% KH550 surfactant, react for 5-10min to promote hydrolysis and form hydroxyl groups, and prepare by adding Monodisperse SiO 2Nanoparticles, after sti...

Embodiment 1

[0032] Fix the container containing PEG200 on a micro-vortex mixer, and gradually add 30% mass fraction, the average particle size is about 500nm, and SiO2 modified by surface grafting during the vibration stirring process. 2 nanoparticles, shake and stir for 2-3h to make SiO 2 Uniformly dispersed in the dispersion medium PEG200 to form a shear thickening fluid. In order to ensure sufficient dispersion, SiO 2 After the nanoparticles are completely added, carry out 2-3h low-temperature ultrasonic dispersion. In order to ensure the stability of the STF dispersion system, vacuum dry the prepared STF for about 24 hours to remove air bubbles.

[0033] Fix the container containing the prepared STF on a micro-vortex mixer, and gradually add 10% mass fraction (the mass percentage of carbon short fiber and STF is 10%), and a length of about 0.2 mm. Short carbon fiber, vibrate and stir for 2-3h. Vacuum dry for about 24 hours to remove the air bubbles generated during the dispersion ...

Embodiment 2

[0036] Fix the container containing PEG200 on a micro-vortex mixer, and gradually add SiO with a mass fraction of 30% and an average particle size of about 600nm without surface graft modification during the vibration stirring process. 2 nanoparticles, shake and stir for 2-3h to make SiO 2 Uniformly dispersed in the dispersion medium PEG200 to form a shear thickening fluid. In order to ensure sufficient dispersion, SiO 2 After the nanoparticles are completely added, carry out 2-3h low-temperature ultrasonic dispersion. In order to ensure the stability of the STF dispersion system, vacuum dry the prepared STF for about 24 hours to remove air bubbles.

[0037] Fix the container containing the prepared STF on a micro-vortex mixer, and gradually add 10% mass fraction (the mass percentage of glass short fiber and STF is 10%), and a length of about 0.5mm after modification. Glass short fiber, vibrate and stir for 2-3h. Vacuum dry for about 24 hours to remove the air bubbles gene...

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Abstract

The invention relates to an ultra-high molecular weight polyethylene fabric composite flexible protective material with low cost, good puncture-proof and bullet-proof property and good flexibility. The flexible protective material comprises multi-layer ultra-high molecular weight polyethylene plain weave fabric or non-woven cloth, shearing thickening fluid soaked on the surface and the interior of the fabric, and discontinuous short fiber (carbon fiber, glass fiber and the like) uniformly adhered on the surface of the fabric and in arbitrary orientation. The flexible protective material takes the ultra-high molecular weight polyethylene fabric as a substrate, so that the cost is greatly reduced; the fabric soaked with the shearing thickening fluid can rapidly harden under the impact effect of daggers or shrapnel or other things, so that the flexible protective material has protective property; the high-strength short fiber adhered on the surface of the fabric can enable acting force of sharp instruments, such as the daggers and the shrapnel to be dispersed on a larger area. The invention designs the low-cost protective material which is high in strength, light in weight, soft, ventilated and comfortable in wearing by utilizing the synergy of the shearing thickening effect of the nanofluid soaked in fabric fiber and the force dispersion effect of the short fiber on the surface of the fabric.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a low-cost, breathable, stab-proof and ballistic-proof flexible composite material and a preparation method thereof. Background technique [0002] With the progress of the times and the continuous development and change of the international and domestic security situation, the application range of protective materials is more and more extensive, such as vehicles, body armor, explosion-proof helmets, sports equipment and stab-proof clothing and other fields. The development process of protective materials is from the initial use of all hard materials to semi-hard materials, and then to soft materials. The early protective clothing was a stab-proof vest made of high-performance alloy cold-rolled into an overall shape or made of high-strength and light-weight (such as aluminum alloy) metal materials to make a protective layer similar to scale armor. Although this design ha...

Claims

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Application Information

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IPC IPC(8): F41H1/02D06M11/74D06M11/79D06M11/45D06M11/46D06M101/20
Inventor 熊党生孙亮亮李巍
Owner NANJING UNIV OF SCI & TECH
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