A Method for Controlling the Shape of Irregular Bubbles in Microchannels

A technology of bubble shape and microchannel, applied in the direction of mixing methods, chemical instruments and methods, mixers, etc., can solve problems such as few researches

Active Publication Date: 2021-01-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Method for Controlling the Shape of Irregular Bubbles in Microchannels
  • A Method for Controlling the Shape of Irregular Bubbles in Microchannels
  • A Method for Controlling the Shape of Irregular Bubbles in Microchannels

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 method for regulating and controlling the shape of irregular bubbles in a microchannel. A compound system of a set amount of cetyltrimethylammonium bromide, silicon dioxide nanoparticles and water and gas are passed into the microchannel. Middle; the microchannel is cross-shaped, which is composed of two liquid phase channels, a gas phase channel and a mixing channel connected with each other, the two liquid phase channels are connected with the mixing channel, and the mixing channel is connected with the control tube; the liquid phase inlet, the gas phase The inner diameters of the inlet, the liquid phase channel, the gas phase channel and the mixing channel are the same, and are all smaller than the inner diameter of the control tube; the compound system is injected into the liquid phase inlet of the microchannel as a continuous phase, and the gas is injected into the gas phase inlet of the microchannel as a dispersed phase, and in the control tube Obtaining continuous irregular-shaped bubbles, the present invention has the advantages of high efficiency, simple device, convenient operation, etc., which is conducive to promoting more in-depth research on non-spherical bubbles in various aspects, and provides possibilities for the application of non-spherical bubbles in other aspects.

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 Patents(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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