Microdroplet/bubble-producing device

Patent metadata

Field	Value
Publication number	US-12168230-B2
Application number	US-201916976384-A
Country	US
Kind code	B2
Filing date	Feb 28, 2019
Priority date	Feb 28, 2018
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

The invention provides a microdroplet- or bubble-producing device that does not require separate through-holes for different liquid droplet/air bubble-producing flow channels. The droplet-producing flow channels are configured in a three-dimensional manner unlike in a conventional device where they are configured in a two-dimensional plane, and therefore the flow channels can be provided in a more high-density configuration than the prior art. In the microdroplet/bubble-producing device comprising slit(s) and the row of the plurality of microflow channels, the slit(s) is/are a continuous phase supply slit, a dispersion phase supply slit and a discharge slit, the plurality of microflow channels are configured so that the ends of the slit(s) and the two supply ports on both sides or the supply port and discharge port on either side are mutually connected, and at the sites of connection between the microflow channels and the slit(s), the dispersion phase undergoes shear with the continuous phase flow as the driving force, producing droplets or air bubbles of the dispersion phase, which are recovered from the discharge port.

First claim

The invention claimed is:

1. A microdroplet/bubble-producing device comprising:
a row of a plurality of microflow channels on a reference plane,
a dispersion phase supply port for supplying a dispersion phase, the dispersion phase supply port having an end connected with the plurality of microflow channels,
a continuous phase supply port for supplying a continuous phase, the continuous phase supply port having an end connected with the plurality of microflow channels,
a discharge port for recovery of a product, the discharge port having an end connected with the plurality of microflow channels, and
a slit connected with the plurality of microflow channels at an end of the slit, the slit having a linear slit end face with a width and axis line having a larger dimension than the size of the width in the reference plane, the reference plane being the flat plane on which the row of the plurality of microflow channels exist, the linear slit end face of the slit being connected with the microflow channels in a transverse direction, the slit having the reference plane as its end and extending from the reference plane in the transverse direction of the reference plane,
the end of the slit being connected through each of the microflow channels with any two from among the end of the dispersion phase supply port, the end of the continuous phase supply port and the end of the discharge port,
the end of the slit being configured to be sandwiched along the axis line of each of the plurality of microflow channels, by said two from among the end of the dispersion phase supply port, the end of the continuous phase supply port and the end of the discharge port,
wherein the plurality of microflow channels are configured to transport one of the dispersion phase and continuous phase in the plurality of microflow channels from one of the sandwiching ports to the sites of connection between the sandwiched slit and the plurality of the microflow channels, while the sandwiched slit is configured to transport the other one of the dispersion phase and continuous phase to the sites of connection between the sandwiched slit and the plurality of the microflow channels, or the plurality of microflow channels are configured to transport both of the dispersion phase and continuous phase in the plurality of microflow channels from the sandwiching ports to the sites of connection between the sandwiched slit and the plurality of the microflow channels; and wherein the sites of connection between the sandwiched slit and the microflow channels are configured to provide shearing of the dispersion phase by the flow of the continuous phase as the driving force, forming droplets or air bubbles of the dispersion phase in the continuous phase, the discharge port being configured for recovery of the product comprising the droplets or air bubbles of the dispersion phase in the continuous phase.

2. The microdroplet/bubble-producing device according to claim 1 , wherein all of the end portions of the dispersion phase supply port, continuous phase supply port and discharge port that are joints with the plurality of microflow channels are slits.

3. The microdroplet/bubble-producing device according to claim 1 , wherein one of the end portions of the dispersion phase supply port, continuous phase supply port and discharge port that are joints with the plurality of microflow channels is hole-shaped, and the other end portions are slits.

4. The microdroplet/bubble-producing device according to claim 1 , wherein the slit is a tabular slit.

5. The microdroplet/bubble-producing device according to claim 2 , wherein the slit is a tabular slit.

6. The microdroplet/bubble-producing device according to claim 1 , wherein the slit is an annular slit.

7. The microdroplet/bubble-producing device according to claim 2 , wherein the slit is an annular slit.

8. The microdroplet/bubble-producing device according to claim 1 , which is constructed by aligning together a part comprising a plurality of slits and a flat part formed with a row of a plurality of microgrooves on the surface thereof, and attaching the face of the ends of the plurality of slits and the face of the flat part that is formed with the microgrooves.

9. The microdroplet/bubble-producing device according to claim 1 , wherein a row of a plurality of microgrooves is formed on the surface of a part comprising a plurality of slits, and the microgrooves are sealed with a separate flat part, forming the row of the plurality of microflow channels.

10. The microdroplet/bubble-producing device according to claim 1 , wherein the microflow channels have widths of 1 to 200 μm and heights of 1 to 200 μm.

11. The microdroplet/bubble-producing device according to claim 8 , wherein the microflow channels have widths of 1 to 200 μm and heights of 1 to 200 μm.

12. The microdroplet/bubble-producing device according to claim 1 , wherein the width of the end of the slit is 10 to 500 μm.

13. The microdroplet/bubble-producing device according to claim 8 , wherein the widths of the ends of the slits are 10 to 500 μm.

14. The microbubble-producing device according to claim 1 , wherein the dispersion phase is a gas phase and the continuous phase is a liquid phase.

15. The microbubble-producing device according to claim 8 , wherein the dispersion phase is a gas phase and the continuous phase is a liquid phase.

16. The microdroplet-producing device according to claim 1 , wherein the dispersion phase and the continuous phase are both liquid phases.

17. The microdroplet-producing device according to claim 8 , wherein the dispersion phase and the continuous phase are both liquid phases.

18. The microdroplet-producing device according to claim 16 , wherein the inner walls of the microflow channels are formed of hydrophobic surfaces, the dispersion phase is an aqueous phase and the continuous phase is an organic phase.

19. The microdroplet-producing device according to claim 17 , wherein the inner walls of the microflow channels are formed of hydrophobic surfaces, the dispersion phase is an aqueous phase and the continuous phase is an organic phase.

20. The microdroplet-producing device according to claim 16 , wherein the inner walls of the microflow channels are formed of hydrophilic surfaces, the dispersion phase is an organic phase and the continuous phase is an aqueous phase.

21. The microdroplet-producing device according to claim 17 , wherein the inner walls of the microflow channels are formed of hydrophilic surfaces, the dispersion phase is an organic phase and the continuous phase is an aqueous phase.

22. A microdroplet/bubble-producing method using a microdroplet/bubble-producing device that comprises:
a row of a plurality of microflow channels on a reference plane,
a dispersion phase supply port for supplying a dispersion phase, the dispersion phase supply port having an end connected with the plurality of microflow channels,
a continuous phase supply port for supplying a continuous phase, the dispersion phase supply port having an end connected with the plurality of microflow channels,
a discharge port for recovery of a product, the discharge port having an end connected with the plurality of microflow channels, and
a slit connected with the plurality of microflow channels at an end of the slit, the slit having a linear slit end face with a width and axis line having a larger dimension than the size of the width in the reference plane, the reference plane being the flat plane on which the row of the

Assignees

• Japan Science & Tech Agency

Inventors

• Nisisako Takasi
• Tottori Naotomo

Classifications

• B01F23/4143

  Microemulsions · CPC title

• B01F23/2373

  for obtaining fine bubbles, i.e. bubbles with a size below 100 µm · CPC title

• B01F33/30121

  the interdigital streams being concentric lamellae · CPC title

• B01F33/3012

  Interdigital streams, e.g. lamellae · CPC title

• B01F25/44121

  with a plurality of parallel slits, e.g. formed between stacked plates · CPC title