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Shear thickening gel/three-dimensional woven energy-absorbing material and preparation method thereof

A technology of energy-absorbing materials and thickening gels, applied in chemical instruments and methods, lamination, layered products, etc., can solve problems such as easy sedimentation of shear-thickening liquids, affecting the energy-absorbing effect of materials, and difficulties in implementation. Achieve the effects of flexibility, lightness, increased application range, and high strength

Inactive Publication Date: 2018-07-13
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the shear thickening liquid is easy to settle and leak in practical application, which affects the energy absorption effect of the material, and solves the problem of difficult encapsulation, and provides a shear thickening gel / three-dimensional Braided energy-absorbing material and its preparation method

Method used

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  • Shear thickening gel/three-dimensional woven energy-absorbing material and preparation method thereof
  • Shear thickening gel/three-dimensional woven energy-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 (acrylate network shear thickening gel)

[0035] Use high-performance three-dimensional braided fibers, such as polyester, ultra-high molecular weight polyethylene fibers, polyaramid fibers or PBO fibers, etc., and use 3D weaving technology to weave high-performance sandwich materials; cut the three-dimensional braided packaging materials according to the designed shape , use adhesive to cold-bond the three-dimensional woven cloth with the upper and lower layers of outer packaging materials, seal on all sides, leave only one pouring port, then take acrylic acid, β-hydroxyethyl acrylate, STF liquid, initiator mixture (wherein the initiator accounts for the polymer The network weight ratio is 1.5%, in STF liquid) at 20°C, mechanically stir to make a mixture; pour the mixture into the three-dimensional braided sandwich composite material, and then place it at 40°C for curing. After it is completely cured, the pouring port Cold-bonded and sealed to prepare shea...

Embodiment 2

[0037] Embodiment 2 (silicone rubber network shear thickening gel)

[0038] Use high-performance three-dimensional braided fibers, such as polyester, ultra-high molecular weight polyethylene fibers, polyaramid fibers or PBO fibers, etc., and use 3D weaving technology to weave high-performance sandwich materials; cut the three-dimensional braided packaging materials according to the designed shape , use adhesive to cold-bond the three-dimensional woven cloth with the upper and lower layers of outer packaging materials, seal on all sides, leaving only one pouring port, and then mix the shear thickening liquid with vinyl silicone oil or vinyl silicone resin, hydrogen-containing silicone oil or hydrogen-containing The hydrosilylation type liquid silicone rubber composition composed of silicone resin, platinum catalyst and hydrophobic white carbon black filler is mechanically stirred and mixed, and the content of platinum catalyst is 0.2% to 0.5% of the whole system weight. Then pl...

Embodiment 3

[0045] Mix 107 glue with ethyl orthosilicate methyltriethoxysilane and STF liquid. After uniformity, add dibutyltin dilaurate initiator, and pour the mixture into the fitted three-dimensional sandwich structure cavity. solidify. The dosage of the initiator dibutyltin dilaurate is between 1% and 3% of the total weight of the 107 glue and ethyl orthosilicate methyltriethoxysilane. All the other are identical with embodiment 2.

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Abstract

The invention discloses a preparation method of a shear thickening gel / three-dimensional woven energy-absorbing material. The preparation method comprises the following steps: step one, weaving high-performance fibers into a fiber woven composite material with a three-dimensional sandwich structure by using a three-dimensional weaving technology; step two, laminating an outer packing material to the side of a three-dimensional sandwich composite material by using an adhesive, and laminating and closing the edge to form a three-dimensional sandwich packing bag; step three, uniformly mixing prepared STF liquid with an obvious shear thickening effect, a high polymer substance and an initiator according to certain proportion, and injecting a mixture into a cavity with the three-dimensional sandwich structure; completely curing, crosslinking and then laminating and closing the outer packing material to the three-dimensional sandwich composite material by using the adhesive to form an STF gel-enhanced three-dimensional sandwich protecting material. The invention also provides the shear thickening gel / three-dimensional woven energy-absorbing material. A protecting texture prepared from the shear thickening gel / three-dimensional woven energy-absorbing material disclosed by the invention has the characteristics of stable performance, high mechanical property, wear resistance and tear resistance.

Description

technical field [0001] The invention relates to an energy-absorbing material and a preparation method thereof, in particular to a shear thickening gel / three-dimensional braided energy-absorbing material and a preparation method thereof. Background technique [0002] Shear thickening fluid (STF for short) is a new type of functional material, which is a slightly viscous liquid under normal conditions. When subjected to impact, a metastable "particle cluster" is generated due to fluid mechanics overcoming the repulsive force between particles. These "particle clusters" grow up with the increase of hydrodynamic force and are separated by the dispersion medium. As a result, the volume of the system becomes larger, and the macroscopic performance shows that the apparent viscosity increases sharply, even discontinuously, showing the impact resistance of a solid; and when the impact force decreases, it quickly returns to the original flexible state. reversibility. [0003] Shear ...

Claims

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Application Information

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IPC IPC(8): B32B7/12B32B27/02B32B27/06B32B33/00B32B37/02B32B37/12B32B9/00B32B9/04
CPCB32B5/024B32B7/12B32B9/04B32B27/06B32B33/00B32B37/02B32B37/12B32B2260/021B32B2260/046B32B2260/048B32B2262/02B32B2262/106B32B2307/546B32B2307/558B32B2307/56B32B2307/7242
Inventor 罗琳琳钟发春刘忠平
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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