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Shear thickening protective liquid and application thereof

A technology for protective liquid and fiber fabrics, applied in textiles, papermaking, fiber processing, etc., can solve the problems of reducing the interaction time between fiber fabrics and projectiles, affecting the ability of fiber fabrics to absorb energy to projectiles, and reducing the flexibility of fiber fabrics. Frictional loss and tensile deformation energy, good protective effect, the effect of increased frictional energy consumption

Active Publication Date: 2020-11-10
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the energy absorption principle of the fiber fabric impregnated with the shear thickening liquid in the protection process does not only rely on the shear thickening effect. The traditional shear thickening liquid will undergo shear thickening at a relatively high shear rate. , increase the viscous loss, after combining with the fiber fabric, the dispersoid particles in the shear thickening liquid will adhere to the yarn, which will reduce the flexibility of the fiber fabric, and the impregnated fiber fabric will shear when it is impacted by the projectile. The degree of shear damage increases and the degree of tensile damage decreases, resulting in a decrease in the interaction time between the fiber fabric and the projectile, and the inability to better absorb the energy of the projectile through the deformation of the back plate, which greatly affects the energy absorption capacity of the fiber fabric to the projectile

Method used

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  • Shear thickening protective liquid and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Nano-SiO with a particle size of 80nm 2 Add the powder into PEG-200 (polyethylene glycol with a molar mass of 200g / mol), and after ultrasonic dispersion is uniform, then add B with a particle size of 50nm to 100nm 4 C powder, continue to ultrasonically disperse, transfer to a vacuum drying oven to dry for 24 hours after the dispersion is uniform, to remove air bubbles, and obtain a shear thickening protective solution; among them, nano-SiO 2 The mass fraction of powder is 20%, B 4 The mass fraction of C powder is 5%, and the mass fraction of PEG-200 is 75%;

[0020] (2) absolute ethanol and the shear thickening protection liquid are mixed according to a mass ratio of 10:7, and mixed evenly to obtain a diluted shear thickening protection liquid;

[0021] (3) Immerse the single-layer fiber fabric (Twaron CT709) in the diluted shear-thickening protective solution, then take it out and vacuum-dry it at a constant temperature of 80°C for 1 hour to obtain the modified f...

Embodiment 2

[0023] (1) Nano-SiO with a particle size of 80nm 2 Add the powder into PEG-200 (polyethylene glycol with a molar mass of 200g / mol), and after ultrasonically dispersing evenly, add B with a particle size of 1 μm to 10 μm 4 C powder, continue to ultrasonically disperse, transfer to a vacuum drying oven to dry for 24 hours after the dispersion is uniform, to remove air bubbles, and obtain a shear thickening protective solution; among them, nano-SiO 2 The mass fraction of powder is 20%, B 4 The mass fraction of C powder is 5%, and the mass fraction of PEG-200 is 75%;

[0024] (2) absolute ethanol and the shear thickening protection liquid are mixed according to a mass ratio of 10:7, and mixed evenly to obtain a diluted shear thickening protection liquid;

[0025] (3) Immerse the single-layer fiber fabric (Twaron CT709) in the diluted shear-thickening protective solution, then take it out and vacuum-dry it at a constant temperature of 80°C for 1 hour to obtain the modified fiber ...

Embodiment 3

[0027] (1) Nano-SiO with a particle size of 80nm 2 Add the powder into PEG-200 (polyethylene glycol with a molar mass of 200g / mol), and after ultrasonic dispersion is uniform, then add B with a particle size of 50nm to 100nm 4 C powder, continue to ultrasonically disperse, transfer to a vacuum drying oven to dry for 24 hours after the dispersion is uniform, to remove air bubbles, and obtain a shear thickening protective solution; among them, nano-SiO 2 The mass fraction of powder is 20%, B 4 The mass fraction of C powder is 10%, and the mass fraction of PEG-200 is 70%;

[0028] (2) absolute ethanol and the shear thickening protection liquid are mixed according to a mass ratio of 10:7, and mixed evenly to obtain a diluted shear thickening protection liquid;

[0029] (3) Immerse the single-layer fiber fabric (Twaron CT709) in the diluted shear-thickening protective solution, then take it out and vacuum-dry it at a constant temperature of 80°C for 1 hour to obtain the modified ...

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Abstract

The invention relates to a shear thickening protective liquid and application thereof, and belongs to the technical field of shear thickening liquids. The shear thickening protective liquid is composed of polyethylene glycol, nano silicon dioxide powder and boron carbide powder; according to the shear thickening protective liquid, under the cooperation of boron carbide particles and silicon dioxide particles, on one hand, friction is increased, and the principle of friction energy absorption between the particles is fully utilized; and on the other hand, the degree of shear failures during impregnation of a fiber fabric can be reduced, and energy absorption of the fiber fabric to shots is increased. The shear thickening protective liquid disclosed by the invention has a better bulletproofeffect in the field of fiber fabric modification, and can be widely applied to the field of different types of protective equipment.

Description

technical field [0001] The invention relates to a shear thickening protective liquid and application thereof, belonging to the technical field of shear thickening liquid. Background technique [0002] Shear thickening liquid is a kind of non-Newtonian fluid. Under the condition of certain shear rate, the viscosity of shear thickening liquid system will increase rapidly with the increase of shear rate. The fiber fabric is immersed in the shear thickening liquid, and its presence makes the fiber fabric have better protective properties. However, the energy absorption principle of the fiber fabric impregnated with the shear thickening liquid in the protection process does not only rely on the shear thickening effect. The traditional shear thickening liquid will undergo shear thickening at a relatively high shear rate. , increase the viscous loss, after combining with the fiber fabric, the dispersoid particles in the shear thickening liquid will adhere to the yarn, which will r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/53D06M11/79D06M11/80
CPCD06M11/79D06M11/80D06M15/53
Inventor 黄广炎许尧杰张宏王涛祁少博周彤
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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