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Preparation method of shock-resistant STF (shear thickening fluid) gel

An anti-shock and liquid technology, which is applied in the preparation of anti-shock shear thickening liquid gel and the field of material preparation, can solve the problem of easy sedimentation and instability of shear thickening liquid, and achieve good shear thickening effect, Improved stability, evenly distributed effect

Active Publication Date: 2017-05-17
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

The present invention aims at the shortcoming that the shear thickening liquid is easy to settle and is unstable, and provides a shear thickening liquid gel and a preparation method thereof

Method used

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  • Preparation method of shock-resistant STF (shear thickening fluid) gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method for impact-resistant shear thickening liquid gel, comprising the steps of:

[0021] (1) Weigh 0.5g of acrylic acid, add 4.5g of β-hydroxyethyl acrylate into a 100ml beaker and stir well.

[0022] (2) Weigh 20g of STF liquid (such as polyethylene glycol suspension containing nano-silica particles), add it to the mixture of acrylic acid and β-hydroxyethyl acrylate, and stir evenly.

[0023] (3) Add 0.06g of dibenzoyl peroxide and 0.02g of N,N-dimethylaniline into the above mixture, stir evenly, and control the reaction temperature at 20°C.

[0024] (4) Stand still until the reaction mixture stops flowing, and STF gel is formed after about half an hour.

[0025] (5) A uniformly dispersed shear-thickening gel can be prepared by the above method.

Embodiment 2

[0027] A preparation method for impact-resistant shear thickening liquid gel, comprising the steps of:

[0028] (1) Weigh 0.5 g of polyethylene glycol (400) diacrylate, add 5 g of isooctyl acrylate into a 100 ml beaker and stir evenly.

[0029] (2) Weigh 20g of STF liquid (such as polyethylene glycol suspension containing nano-silica particles), add it to the mixture of acrylic acid and β-hydroxyethyl acrylate, and stir evenly.

[0030] (3) Add 0.07 g of benzoyl peroxide into the above mixture, stir evenly, and control the reaction temperature at 40°C.

[0031] (4) Stand still until the reaction mixture no longer flows to form STF gel.

[0032] (5) A uniformly dispersed shear-thickening gel can be prepared by the above method.

Embodiment 3

[0034] A preparation method for impact-resistant shear thickening liquid gel, comprising the steps of:

[0035] (1) Weigh 0.7 g of acrylic acid, 4.4 g of a mixture of equal weights of β-hydroxyethyl acrylate and isooctyl acrylate, add it into a 100 ml beaker and stir evenly.

[0036] (2) Weigh 22g of STF liquid (such as polyethylene glycol suspension containing nano-silica particles), add it to the mixture of acrylic acid and β-hydroxyethyl acrylate, and stir evenly.

[0037] (3) Add 0.06 g of azobisisobutyronitrile into the above mixture, stir evenly, and control the reaction temperature at 30°C.

[0038] (4) Stand still until the reaction mixture no longer flows to form STF gel.

[0039] (5) A uniformly dispersed shear-thickening gel can be prepared by the above method.

[0040] The schematic diagram of the STF gel structure prepared by the embodiment of the present invention is as attached figure 1 shown, from the attached figure 1 It can be seen that the shear-thickeni...

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Abstract

The invention discloses a preparation method of shock-resistant STF (shear thickening fluid) gel. 1-10 parts by weight of any one or a mixture of several of acrylic acid, polyethylene glycol (400) diacrylate, and polyethylene glycol (600) methacrylate, 10-15 by weight of any one or a mixture of several of beta-hydroxyl ethyl acrylate, iso-octyl acrylate and butyl acrylate as well as 30-90 by weight of an STF are mixed in a reaction container; an initiator with the weight accounting for 0.15%-2% of the total weight of the mixture is added to initiate a reaction, the reaction temperature is controlled within 10-80 DEG C, and uniform mixing and defoaming are performed; standing is performed, and the uniform and stable STF gel is obtained after a curing reaction. The prepared STF gel is uniformly dispersed, cannot settle easily and has a good shear thickening effect. Besides, the preparation process is good in stability and can realize industrial production.

Description

technical field [0001] The invention relates to a preparation method of a material, in particular to a preparation method of an impact-resistant shear thickening liquid gel, and belongs to the technical field of colloidal material preparation. Background technique [0002] Shear-thickening gel is a gel material formed by in-situ compounding of shear-thickening fluid (STF fluid) and polymer gel matrix, which has the characteristics of impact energy absorption, but does not have fluidity. Shear thickening fluid (STF fluid) is a solid-liquid suspension system with high solid phase content, which usually presents a flowing liquid state, and the liquid instantly turns into a hard solid when it is impacted. Shear thickening refers to the phenomenon that the apparent viscosity increases with the increase of shear rate in non-Newtonian fluids. [0003] This kind of shear thickening gel is usually flexible and elastic. When subjected to impact force, the internal inorganic nanoparti...

Claims

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Application Information

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IPC IPC(8): C08F220/28C08F220/18C08F222/20C08F220/06C08F4/40
CPCC08F4/40C08F220/18C08F220/28C08F222/20C08F220/281C08F220/1808C08F222/102C08F220/06
Inventor 钟发春罗琳琳刘忠平
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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