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A method of preparing shear thickening liquid

A liquid, polyethylene glycol technology, applied in textiles, papermaking, fiber processing, etc., can solve the problems of increasing the preparation cycle of silica shear thickening liquid, affecting the performance of shear thickening liquid, and increasing production costs. Achieve the effect of facilitating large-scale production, avoiding further separation, and reducing loss rate

Active Publication Date: 2021-03-02
湖南铁研博发科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this preparation technology is that when preparing the shear thickening liquid, because the microsphere powder needs grinding and dispersing processes, the preparation cycle of the silica shear thickening liquid is increased, and in most cases, an organic solvent is required, which not only increases Production cost; and, due to the cumbersome preparation process, it is easy to introduce impurities, which affect the performance of the shear thickening liquid

Method used

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  • A method of preparing shear thickening liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example is a method for preparing a shear thickening liquid. The method specifically includes adding 4 kg of polyethylene glycol into an internal mixer, preheating the polyethylene glycol to 75°C, maintaining the temperature, and adding an average particle size Nano silica microspheres with a diameter of 250nm, at a speed of 40r / min, mix for the first time for 30 minutes, then add KH-570, mix for the second time for 10 minutes, take it out and seal it, cool to room temperature to obtain shear thickening liquid.

[0032] Take the prepared 200g sample, wrap an egg with the sample, and do a drop bell test. When a 500g drop bell falls vertically from a height of 1m, the egg does not break. It can be seen that the shear thickening liquid prepared in this example has good impact resistance and can effectively play a buffering role.

Embodiment 2

[0034] This example is a method for preparing a shear thickening liquid. The method specifically includes: adding 4 kg of polyethylene glycol into an internal mixer, preheating the polyethylene glycol to 85°C, maintaining the temperature, and adding the average particle size Nano-silica microspheres with a diameter of 350nm, at a speed of 60r / min, mix for the first time for 30 minutes, then add KH-560, mix for the second time for 10 minutes, take it out and seal it, cool to room temperature to obtain shear thickening liquid.

[0035] The drop weight test in Example 1 was carried out using the shear thickening liquid prepared in this example, and the eggs did not break. It can be seen that the shear thickening liquid prepared in this example has good impact resistance and can effectively play a buffering role.

Embodiment 3

[0037] This example is a method for preparing a shear thickening liquid. The method specifically includes: adding 4 kg of polyethylene glycol into an internal mixer, preheating the polyethylene glycol to 85°C, maintaining the temperature, and adding the average particle size Nano silica microspheres with a diameter of 450nm, at a speed of 50r / min, mix for 35 minutes for the first time, then add KH-560, mix for 8 minutes for the second time, take it out and seal it, cool to room temperature to obtain shear thickening liquid.

[0038] The drop weight test in Example 1 was carried out using the shear thickening liquid prepared in this example, and the eggs did not break. The shear thickening liquid prepared in this embodiment has good impact resistance and can effectively play a buffering role.

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Abstract

The invention relates to a method for preparing a shear thickening liquid. The method specifically includes: adding a dispersion medium into an internal mixer, preheating the dispersion medium to 65°C to 90°C, maintaining the temperature, adding nano-silica Balls, at a speed of 30-80r / min, mix for 15-40 minutes for the first time, then add silane coupling agent, mix for 5-30 minutes for the second time, seal and cool, and you get it. The invention adopts the method of directly heating the dispersion medium and mixing in the internal mixer, which can not only reduce the viscosity of the shear thickening liquid, but also improve the preparation efficiency without introducing other impurities. The quality of the prepared shear thickening liquid can be effectively controlled and the performance is stable. For industrial production, it has great value.

Description

technical field [0001] The invention relates to the preparation of energy-absorbing materials, in particular to a method for preparing a shear-thickening liquid based on nano silicon dioxide. Background technique [0002] Shear thickening liquid is a new type of intelligent anti-impact material, which is in a liquid state under normal conditions. When subjected to high-speed shear or external impact, the viscosity and strength of the material increase rapidly, and the liquid state changes into a solid state to achieve energy absorption protection. Effect. N.J.Wagner and others at the University of Delaware in the United States first proposed the idea of ​​using this shear thickening fluid to prepare protective armor. The composite material prepared by combining cutting thickening fluid and aramid (Kevlar) fiber cloth, while not reducing the flexibility of the raw material cloth, its ballistic performance is greatly improved, the performance of knife stab resistance is sligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/53D06M15/643D06M11/79D06M13/513
Inventor 陈卓罗世彬裘航胜
Owner 湖南铁研博发科技有限公司
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