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Microchannel irregular-shaped bubble adjusting method

A bubble shape, microchannel technology, applied in mixing methods, chemical instruments and methods, dissolution, etc., can solve problems such as few studies

Active Publication Date: 2019-03-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the research fields of gas microreactors, cavity materials, and gas storage, it is often necessary to control the bubbles with a certain special shape according to the experimental conditions. It is spherical or ellipsoidal, and its shape is relatively regular. There are few reports on the regulation of irregularly shaped bubbles.

Method used

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  • Microchannel irregular-shaped bubble adjusting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] At room temperature (20±5°C), first prepare 50 g of CTAB aqueous solution with a concentration of 0.02 mmol / L and stir for 3 minutes to disperse CTAB evenly in water; finally add 30% silica nano The particle dispersion is stirred for 5 minutes and ultrasonically dispersed for 1 minute to fully dissolve; a compound system is obtained, and the mass fraction of silica nanoparticles in the compound system is 2%.

[0052] The compound system is used as the continuous phase to inject from the liquid phase inlet 5 using a micro injection pump, and the injection speed is 0.45ml / min, and methane is injected from the gas phase inlet 6 using a micro injection pump as the dispersed phase, and the injection speed is 0.45ml / min , wait for the stable generation of bubbles at the cross-shaped place formed by two liquid phase channels 1, one gas phase channel 2 and one mixing channel 4, and observe the change of the shape of the bubbles in the control tube 3. Depend on figure 2 It can...

Embodiment 2

[0054] At room temperature (20±5°C), first prepare 50 g of CTAB aqueous solution with a concentration of 0.07 mmol / L and stir for 3 minutes to disperse CTAB evenly in water; finally add 30% silica nano The particle dispersion is stirred for 5 minutes and ultrasonically dispersed for 1 minute to fully dissolve; a compound system is obtained, and the mass fraction of silica nanoparticles in the compound system is 2%.

[0055] The composite system is used as the continuous phase to inject from the liquid phase inlet 5 with a micro-injection pump at an injection rate of 0.45ml / min, and carbon dioxide is injected as a dispersed phase from the gas-phase inlet 6 with a micro-injection pump at an injection rate of 0.45ml / min , wait for the stable generation of bubbles at the cross-shaped place formed by two liquid phase channels 1, one gas phase channel 2 and one mixing channel 4, and observe the change of the shape of the bubbles in the control tube 3. Depend on image 3 It can be s...

Embodiment 3

[0057] At room temperature (20±5°C), first prepare 50 g of CTAB aqueous solution with a substance concentration of 0.1 mmol / L, stir for 3 minutes to disperse CTAB evenly in water; finally add 30% silica nano The particle dispersion is stirred for 5 minutes and ultrasonically dispersed for 1 minute to fully dissolve; a compound system is obtained, and the mass fraction of silica nanoparticles in the compound system is 2%.

[0058] Use the compound system as the continuous phase to inject from the liquid phase inlet 5 with a micro-injection pump at an injection rate of 0.45ml / min, and use nitrogen as the dispersed phase to inject from the gas-phase inlet 6 with a micro-injection pump at an injection rate of 0.45ml / min , wait for the stable generation of bubbles at the cross-shaped place formed by two liquid phase channels 1, one gas phase channel 2 and one mixing channel 4, and observe the change of the shape of the bubbles in the control tube 3. Depend on Figure 4 It can be s...

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Abstract

The invention discloses a microchannel irregular-shaped bubble adjusting method. According to the microchannel irregular-shaped bubble adjusting method, a set quantity of a compound system composed ofcetyl trimethyl ammonium bromide, silicon dioxide nanoparticles and water is inlet together with gas into a microchannel; the microchannel is in a crossed shaped and composed of two liquid phase channels, a gaseous phase channel and a mixing channel which are communicated with one another, wherein the two liquid phase channels are communicated with the mixing channel, and the mixing channel is communicated with an adjusting pipe; a liquid phase inlet, a gaseous phase inlet, the liquid phase channels, the gaseous phase channel and the mixing channel are identical in internal diameter, which issmaller than the internal diameter of the adjusting pipe; the compound system is injected as a continuous phase into the liquid phase inlet of the microchannel, and the gas is injected as a dispersion phase into the gas phase inlet of the microchannel to form continuous irregular-shaped bubbles inside the adjusting pipe. The microchannel irregular-shaped bubble adjusting method has the advantagesof being high in efficiency, simple in device, convenient to operate and the like, promotes deeper research on non-spherical bubbles in various domains, and provides possibility of application of thenon-spherical bubbles in other domains.

Description

technical field [0001] The invention relates to the field of bubble regulation, in particular to a method for regulating the shape of irregular bubbles in a microchannel. Background technique [0002] Foams have attracted interest and attention in recent years due to their widespread applications in fields such as mining, food, and oil fields. Conventional bubbles always exist in a spherical shape, because surface tension keeps the bubble in a form with the lowest energy by reducing the surface area. Therefore, it is still challenging to generate stable non-spherical bubbles. [0003] At present, in the research fields of gas microreactors, cavity materials, and gas storage, it is often necessary to control the bubbles with a certain special shape according to the experimental conditions. It is spherical or ellipsoidal, and its shape is relatively regular. There are few reports on the regulation of irregularly shaped bubbles. Contents of the invention [0004] The purpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F13/00B01F3/04
CPCB01F23/29B01F33/30
Inventor 于筱溪吴一宁王若玙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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