Preparation method of novel shearing and thickening fluid

A fluid and new technology, applied in the field of preparation of new shear thickening fluids, can solve problems such as waste of raw materials, and achieve the effects of avoiding waste, stable product properties, and less three wastes

Active Publication Date: 2014-09-17
浙江七色彩虹科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of waste of raw materials in the preparation process of high-efficiency shear thickening fluid and rationally utilize the characteristic that tetraneedle-shaped ZnO whiskers can form an isotropic system when used as a filler, expand

Method used

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  • Preparation method of novel shearing and thickening fluid
  • Preparation method of novel shearing and thickening fluid
  • Preparation method of novel shearing and thickening fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dissolve 5g of tetraneedle-shaped ZnO whiskers in absolute ethanol at a mass ratio of 1:40, stir for 45min at 2000r / min, then filter the mixture into a filter cake, and place the filter cake at 110 Dry in an oven at ℃ for 2 hours for later use;

[0025] (2) Add 0.05g, 0.10g, 0.15g and 0.20g of the above powders into 90g of polyethylene glycol with a molecular weight of 200, stir for 1 hour under the condition of 2000r / min with a magnetic stirring device, and then use a 240W power Ultrasonic dispersion in ultrasonic cleaning device for 5h, and finally stand for 6h.

[0026] (3) Take 10g of silicon dioxide micro-nano powder and add it to the above system, continue to mechanically stir for 2h, and then use PM100 ball milling equipment to continue to disperse at 100r / min for 2h. Vacuumize for 1 hour to remove air bubbles in the system, and let it stand for 1 hour to finally obtain 4 kinds of shear thickening fluids.

[0027] The steady-state rheological curves of four...

Embodiment 2

[0029] (1) Dissolve 5g of tetraneedle-shaped ZnO whiskers in absolute ethanol at a mass ratio of 1:50, stir for 60min at 2000r / min, then filter the mixture into a filter cake, and place the filter cake at 110 Dry in an oven at ℃ for 3 h.

[0030] (2) Add 0.20 g of the above powder into 85 g of polyethylene glycol with a molecular weight of 400, and stir for 1 h with a magnetic stirring device at 2000 r / min ， Then ultrasonically disperse for 4 hours in a 240W power ultrasonic cleaning device, and finally stand still for 7 hours.

[0031] (3) Take 15g of silicon dioxide micro-nano powder and add it to the above system, continue to mechanically stir for 2h, and then use PM100 ball milling equipment to continue to disperse at 100r / min for 2h. Vacuumize for 1 hour to remove air bubbles in the system, let stand for 1 hour, and finally obtain a shear thickening fluid.

[0032] The steady-state rheological curve of a shear-thickening fluid is image 3 shown. It can be seen from th...

Embodiment 3

[0034] (1) Dissolve 5g of tetraneedle-shaped ZnO whiskers in absolute ethanol at a mass ratio of 1:40, stir for 55min at 2000r / min, then filter the mixture into a filter cake, and place the filter cake at 110 Dry in an oven at ℃ for 2 hours for later use;

[0035] (2) Add 0.05g, 0.10g, 0.15g and 0.20g of the above powders into 80g polyethylene glycol 200 respectively, and stir for 1 hour under the condition of 2000r / min with a magnetic stirring device ， Then ultrasonically disperse for 5 hours in a 240W power ultrasonic cleaning device, and finally stand still for 8 hours.

[0036] (3) Take 20g of silicon dioxide micro-nano powder and add it to the above system, continue to mechanically stir for 2h, and then use PM100 ball milling equipment to continue to disperse at 100r / min for 2h. Vacuumize for 1 hour to remove air bubbles in the system, and let it stand for 1 hour to finally obtain 4 kinds of shear thickening fluids.

[0037] The steady-state rheological curves of four k...

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Abstract

The invention discloses a preparation method of a novel shearing and thickening fluid. The preparation method of the novel shearing and thickening fluid comprises the following steps: firstly, preparing a mixed system of tetrapod-shaped ZnO crystal whisker and polyethylene glycol, guaranteeing uniform dispersion of mediums by using manners of ultrasonically processing and standing, then adding SiO2 micro nanospheres into the system, and finally carrying out mechanical agitation, ball milling dispersion and the like to obtain the novel shearing and thickening fluid. By virtue of the method, the application of the tetrapod-shaped ZnO crystal whisker is expanded; meanwhile, uniform dispersion of two mediums can be effectively achieved; compared with a thickening system by taking separate SiO2 as a dispersion medium, the novel shearing and thickening fluid has the advantages that the shearing and thickening effect can be obviously improved by more than 3 times on the promise of same SiO2 mass fraction; the preparation method of the novel shearing and thickening fluid has the advantages of simple process, low cost, stable product property and high utilization rate of raw materials.

Description

technical field [0001] The invention relates to the technical field of micro-nano powder application, in particular to a preparation method of a novel shear thickening fluid. Background technique [0002] Recent studies have found that monodisperse SiO 2 The fluid prepared by dispersing micro-nanospheres in organic solvents such as polyethylene glycol will undergo shear thickening characteristics, in which the apparent viscosity increases rapidly when the shear rate increases or is impacted by an external force. Since the 1980s, more and more researchers began to focus on how to use this phenomenon. N.J.Wagner and others at the University of Delaware in the United States took the lead in studying the shearing agent prepared by nano-silica particles dispersed in polyethylene glycol. The rheological behavior of shear thickening system, and further expanded the specific application of this phenomenon in the follow-up research. [0003] The new protective material prepared by ...

Claims

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Application Information

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IPC IPC(8): D06M11/79D06M11/44D06M15/53
Inventor 傅雅琴王砚朱曜峰张其峰
Owner 浙江七色彩虹科技有限公司
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