Preparation method and use of shear thickening fluid

A fluid and equipment technology, applied in the application field of low-viscosity silicone oil, can solve problems such as system instability, strong hygroscopicity, and resistance to shearing, and achieve stable product quality, enhanced effect, and the effect of preventing agglomeration

Active Publication Date: 2013-01-30
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the shear thickening liquid for preparing liquid protective materials is mostly composed of polyethylene glycol and silicon dioxide. The Chinese patent application number 201110062145.0 discloses a SiO-based 2 The preparation method of the shear thickening fluid of micro-nanospheres, the patent discloses the shear thickening fluid with polyethylene glycol as the base material, but due to the limitations of the structure of polyethylene glycol itself, the composition of the system exists due to the Ethylene glycol has strong hygroscopicity, which leads to system instability, low bond energy, and shear resistance.

Method used

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  • Preparation method and use of shear thickening fluid

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Experimental program
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Effect test

Embodiment 1

[0020] (1) Add SiO with an average particle size of 450nm to a mixture of 1.0kg of hydroxyl-terminated polydimethylsiloxane (molecular weight: 200) and 0.2kg of co-solvent absolute ethanol 2 0.3 kg of particles and 0.1 kg of titanium dioxide particles with an average particle size of 250 nm were treated with a planetary stirring device for 3 hours to obtain a shear thickening fluid diluted with absolute ethanol.

[0021] (2) Then, heat up the above-mentioned shear thickening fluid diluted with absolute ethanol to 55°C, slowly stir and volatilize under vacuum to remove absolute ethanol, and obtain the final shear thickening fluid A with a viscosity of 2500 ±500cps.

[0022] Shear thickening fluid A has good shear thickening properties and can well meet the needs of subsequent processing.

Embodiment 2

[0024] (1) Add SiO with an average particle size of 100nm to a mixture of 1.0kg of ethoxy-terminated polydimethylsiloxane (molecular weight: 500) and 0.05kg of absolute ethanol 2 0.35 kg of particles and 0.08 kg of titanium dioxide particles with an average particle size of 250 nm were treated with ultrasonic stirring equipment for 1 hour. A shear thickened fluid diluted with absolute ethanol was prepared.

[0025] (2) Then, raise the temperature of the above-mentioned shear thickening fluid diluted with absolute ethanol to 65°C, and at the same time slowly stir and volatilize the absolute alcohol under vacuum conditions to obtain the final shear thickening fluid B , the viscosity is 3000±500cps.

[0026] Shear thickening fluid B has good shear thickening properties, which can well meet the needs of subsequent processing.

Embodiment 3

[0028] (1) In a mixture of 0.5 kg of hydroxyl-terminated polydimethylsiloxane (molecular weight: 800), 0.5 kg of ethoxy-terminated polydimethylsiloxane (molecular weight: 250) and 0.4 kg of anhydrous isopropanol The average particle size of 100nm SiO was added to the mixture 2 Particles 0.25kg and average particle size 50nm SiO 2 Granules 0.20kg, treated with planetary stirring equipment for 3.5 hours.

[0029] (2) Then, the temperature of the shear thickening fluid diluted with anhydrous isopropanol prepared above was raised to 70°C, and at the same time, it was slowly stirred and volatilized under vacuum conditions to remove anhydrous isopropanol to obtain the final shear thickening fluid. Thick fluid C has a viscosity of 4000±600cps.

[0030] Shear thickening fluid C has good shear thickening properties, which can well meet the needs of subsequent processing.

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Abstract

The invention relates to the technical field of organic silicon polymer application and provides a preparation method of a shear thickening fluid. The preparation method realizes compatible matching of micro/nano-particles and a dispersion medium and improves system shear thickening effects and system storage stability. The shear thickening fluid is prepared by mixing micro/nano-particles and an organic silicon polymer, wherein a mass ratio of the micro/nano-particles to the organic silicon polymer is (1-3): (2-4). The preparation method is simple and has short preparation time. The shear thickening fluid obtained by the preparation method has stable quality, can be mass-produced easily, has low energy consumption, produces less three wastes and has a low cost. The invention also provides a use of the shear thickening fluid in a liquid protection composite material. The liquid protection composite material prepared from the shear thickening fluid has no toxicity and no pollution and is suitable for a human body and industrial production.

Description

technical field [0001] The invention relates to the technical field of application of low-viscosity silicone oil, in particular to the preparation of a shear-thickening suspension dispersed in low-viscosity silicone oil. Background technique [0002] The possibility of human beings facing injuries in real life is constantly increasing, and the requirements for the types and performance of protective equipment are also increasing. With the development of high-performance fiber materials, personal protective materials have also made great progress in recent years, gradually developing from the original hard and semi-rigid products to the current soft products and the latest liquid protective equipment. The field of protection has great market prospects. As a macroscopic phenomenon, the shear thickening effect of this dispersion system has long attracted people's attention, such as the blockage of transmission pipelines and the destruction of instruments, etc. In production pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/513D06M15/643D06M11/79D06M11/46D06M15/263D06M15/233D06M11/76D06M101/30D06M101/36
Inventor 来囯桥张国栋邬继荣蒋剑雄许文东齐帆
Owner HANGZHOU NORMAL UNIVERSITY
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