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Preparation method of shear thickening liquid

A technology for thickening liquids and emulsions, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of easy agglomeration, instability, and difficulty in the preparation of STF liquids of nanoparticles, and achieve the effect of simple preparation process.

Active Publication Date: 2015-02-04
深圳市思创新材科技有限公司
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AI Technical Summary

Problems solved by technology

[0005] Although the STF liquid has the above-mentioned excellent characteristics, there are certain technical bottlenecks in the preparation of STF. When the STF liquid is prepared by the traditional method, the nanoparticles are often easily agglomerated due to the presence of nanoparticles with a high solid content, resulting in the STF colloidal suspension system being easily settled. unstable
And the preparation is time-consuming, limited to the preparation of a small amount of STF liquid in the laboratory for the research of the basic characteristics of STF liquid, it is difficult to realize the preparation of large-scale STF liquid, which greatly limits the application of STF liquid

Method used

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preparation example Construction

[0024] see figure 1 , figure 1 The flow chart of the steps of the method 100 for preparing the shear thickening liquid provided by the embodiment of the present invention includes:

[0025] Step S110: uniformly mixing the non-volatile liquid medium and the volatile solvent to obtain a mixed solution;

[0026] Preferably, the mass ratio of the non-volatile liquid medium to the volatile solvent is between 1 / 2˜1 / 6.

[0027] Preferably, the non-volatile liquid medium is at least one of ethylene glycol and polyethylene glycol.

[0028] Preferably, the volatile solvent is at least one of ethanol and ethyl acetate.

[0029] Specifically, the non-volatile liquid medium and the volatile solvent are uniformly mixed according to the above mass ratio in a container equipped with stirring and ultrasonic equipment to obtain the above mixed solution.

[0030] Step S120: adding nanoparticles into the mixed solution, stirring and dispersing to form an emulsion;

[0031] Preferably, the na...

Embodiment

[0040] Quantitatively take 600g of ethylene glycol and 1200g of ethanol into a 3L container and stir and mix evenly; weigh 1300g of nano-silica particles, add them to the above mixed solution under stirring and ultrasonication, stir and ultrasonically disperse for 1-2 hours until a uniform white Emulsion; move the above emulsion to a container with a vacuum system, remove the volatile solvent in vacuum for about 2-4 hours until no bubbles are generated; turn off the vacuum system, break the vacuum to normal pressure, and obtain the shear thickening of the designed composition Liquid, it can be understood that by changing the quality of ethylene glycol, ethanol and nano-silica particles, the above method can be used to prepare shear-thickening liquids with various proportions and high solid content.

[0041] see figure 2 , is the rheological characteristic curve graph of the STF liquid of each solid phase content that the present embodiment prepares, from figure 2 It can be ...

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Abstract

The invention provides a preparation method of a shear thickening liquid. According to the preparation method, nanoparticles are used as a solid phase component of an STF liquid; a non-volatile liquid medium and volatile diluting solvent are prepared into a mixed solution; and the nanoparticles are dispersed in the mixed solution under the effects of stirring and ultrasound to form an emulsion; and then the diluting solvent is removed under a vacuum condition to obtain an uniform, transparent and stable STF liquid.

Description

【Technical field】 [0001] The invention relates to a preparation method of a shear thickening liquid. 【Background technique】 [0002] Shear thickening liquid (STF liquid for short) is a kind of non-Newtonian fluid. The fluid is often in the form of a concentrated colloidal suspension. Under the rapidly increasing shear stress, the viscosity of the liquid increases sharply, and even changes from liquid to solid, and This process is reversible. This phenomenon is mainly attributed to the formation of rigid structural clusters of particles under liquid pressure. This characteristic of STF liquid makes it have a wide range of application prospects in many technical fields such as damping and vibration reduction, hydraulic coupling devices of gearboxes, vehicle suspension systems and personal protection. [0003] STF liquid is usually a solid-liquid suspension system formed by dispersing colloidal particles with a diameter of less than 1 μm in a liquid medium. These solid partic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
Inventor 钟发春刘键杨秀兰郝晓飞白军伟
Owner 深圳市思创新材科技有限公司
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