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STF (shear thickening fluid) as well as preparation method and application thereof

A liquid, three-dimensional technology, applied in the field of shear thickening liquid and its preparation, can solve the problems of weak friction, inability to effectively absorb and diffuse the high-speed impact energy of bullets, weak ballistic impact performance, etc., and achieve large fracture work and fracture Low elongation, strong energy absorption effect

Pending Publication Date: 2017-12-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, previous studies have found that the three-dimensional angular interlocking structure fabric is affected by the structure, and the friction is weak so that it cannot effectively absorb and diffuse the energy of the high-speed impact of the bullet; compared with other fabrics, its ballistic impact performance is often weak

Method used

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  • STF (shear thickening fluid) as well as preparation method and application thereof
  • STF (shear thickening fluid) as well as preparation method and application thereof
  • STF (shear thickening fluid) as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of a three-dimensional angle interlocking bulletproof fabric, comprising the following steps:

[0038] 1) Dry the three-dimensional bulletproof fabric at 50°C for 2 hours, cool and set aside;

[0039] 2) mixing shear-thickening liquid and absolute ethanol by mass ratio of 1:1.5 at 25 DEG C of ultrasonic vibrations for 30min to obtain diluent, for subsequent use;

[0040] 3) Immerse the cooled three-dimensional bulletproof fabric in a diluent with a temperature of 25°C, and ultrasonically vibrate for 5 minutes, so that the shear-thickening liquid is uniformly dispersed in the fabric. ;

[0041] 4) Dry the impregnated three-dimensional bulletproof fabric at 75°C for 13 minutes, and then cool to obtain a three-dimensional angle interlocking bulletproof fabric;

[0042] The three-dimensional bulletproof fabric includes 4 layers of yarns formed by interweaving aramid warp yarns and aramid weft yarns. The multi-layer yarn layers are bound by the binding...

Embodiment 2

[0048] A preparation method of a three-dimensional angle interlocking bulletproof fabric, comprising the following steps:

[0049] 1) Dry the three-dimensional bulletproof fabric at 50°C for 2 hours, cool and set aside;

[0050]2) mixing shear-thickening liquid and absolute ethanol by mass ratio of 1:1.5 at 25 DEG C of ultrasonic vibrations for 30min to obtain diluent, for subsequent use;

[0051] 3) Immerse the cooled three-dimensional bulletproof fabric in a diluent with a temperature of 25°C, and ultrasonically vibrate for 4min, so that the shear-thickening liquid is uniformly dispersed in the fabric;

[0052] 4) Dry the impregnated three-dimensional bulletproof fabric at 75°C for 13 minutes, and then cool to obtain a three-dimensional angle interlocking bulletproof fabric;

[0053] The three-dimensional bulletproof fabric includes 4 layers of yarns formed by interweaving aramid warp yarns and aramid weft yarns. The multi-layer yarn layers are bound by the binding yarns ob...

Embodiment 3

[0059] A preparation method of a three-dimensional angle interlocking bulletproof fabric, comprising the following steps:

[0060] 1) Dry the three-dimensional bulletproof fabric at 50°C for 2 hours, cool and set aside;

[0061] 2) mixing shear-thickening liquid and absolute ethanol by mass ratio of 1:1.5 at 25 DEG C of ultrasonic vibrations for 30min to obtain diluent, for subsequent use;

[0062] 3) Immerse the cooled three-dimensional bulletproof fabric in a diluent with a temperature of 25°C, and ultrasonically vibrate for 4min, so that the shear-thickening liquid is uniformly dispersed in the fabric;

[0063] 4) Dry the impregnated three-dimensional bulletproof fabric at 75°C for 13 minutes, and then cool to obtain a three-dimensional angle interlocking bulletproof fabric;

[0064] The three-dimensional bulletproof fabric includes 4 layers of yarns formed by interweaving aramid warp yarns and aramid weft yarns. The multi-layer yarn layers are bound by the binding yarns o...

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Abstract

The invention relates to an STF (shear thickening fluid) as well as a preparation method and an application thereof. The preparation method comprises steps as follows: polyethylene glycol and nano silica are weighed respectively, the weighed polyethylene glycol is poured into a beaker, a stirring bar is added, and the beaker is put in a magnetic stirrer; stirring starts, weighed nano silica is added to the beaker in separate times at the room temperature, and stirring is continued after addition; stirring is stopped, the beaker is put in a vacuum drying oven for standing, bubbles in a dispersion system are removed, and the STF is obtained. By means of the STF, shock resistance of body armour fabric to bullets or shrapnels is enhanced; the STF is reversible, so that softness of the material can still be kept after impact property of the bullets or the shrapnels disappears. The provided body armour fabric is high in modulus, low in breaking elongation and high in work of fracture and has strong capacity of absorbing energy of impact.

Description

technical field [0001] The present invention relates to a kind of shear thickening liquid, especially relate to a kind of shear thickening liquid and its preparation method and its application. Background technique [0002] As important personal military and police protective equipment, body armor can effectively protect the human body by absorbing and dissipating the kinetic energy of warhead fragments and preventing penetration. main trend. [0003] The research on bulletproof materials for clothing has undergone three generations of evolution: from the protection of hard and bulky inorganic materials such as metals, to the gradual progress of polymer soft and lightweight two-dimensional flexible organic materials, it has entered the field of high-performance three-dimensional flexible materials. technical level. [0004] As a three-dimensional flexible clothing bulletproof material, the three-dimensional angle interlocking structure fabric has strong plasticity and ca...

Claims

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Application Information

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IPC IPC(8): D06M15/53D06M11/79
CPCD06M11/79D06M15/53
Inventor 杨丹
Owner WUHAN TEXTILE UNIV
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