Flow path device and droplet forming method

Abstract

Provided is a flow path device that has at least one flow path therein for making a continuous phase liquid and a dispersed phase liquid flow therethrough and forming dispersed phase droplets in the continuous phase liquid, wherein: the flow path has a main flow path allowing flow of the continuous phase liquid and a secondary flow path connected to the main flow path at a prescribed location between the two ends thereof and guiding the dispersed phase liquid to the main flow path; the flow path device has an inner wall surface surrounding the periphery of the main flow path and defining the main flow path; the main flow path has a connecting opening formed in the inner wall surface and communicating with the secondary flow path; and the inner wall surface has an extended surface providedin a position downstream of the connecting opening in the main flow path, the extended surface extending to the outside of the main flow path so as to promote detachment from the inner wall surface ofthe dispersed phase liquid that has flowed into the main flow path via the connecting opening from the secondary flow path and is adhering to the inner wall surface.

Description

technical field [0001] The invention relates to a flow path device and a droplet forming method. Background technique [0002] Conventionally, there is known a flow channel device including a flow channel for allowing a continuous phase and a dispersed phase to flow to form droplet particles of the dispersed phase in the continuous phase. An example of such a channel device is shown in Patent Document 1 and Patent Document 2 below. [0003] The channel device disclosed in Patent Document 1 below includes a plurality of microchannels arranged to intersect each other and connected to each other. In this flow channel device, the dispersed phase flows from one microchannel to the continuous phase flowing in the other microchannel, and at the junction point, droplets of the dispersed phase are formed in the continuous phase. Furthermore, this patent document 1 shows that, when the base material for forming the microchannel is made of acrylic, by using oil as the continuous phas...

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Problems solved by technology

[0006] In addition, in the case of changing the wettability of the inner wall surface by surface treatment of the inner wall surface of the flow channel, the water-based or oily properties of the droplet that can be formed are not limited depending on the properties of the base material, but for the flow channel The work of surface treatment on the inner wall surface of the road becomes cumbersome

[0007] In addition, in the case where droplets of the dispersed phase are formed using a flow path having a portion where the flow path width is locally narrowed, there is a high risk that the flow path will be clogged at the portion where the flow path width is narrowed, and pressure will also occur. The problem of increasing losses

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