JP2010107404A - Channel chip for evaluating solid/liquid interface reaction, and solid/liquid interface reaction evaluating device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the change in the volume of a channel or the blocking of a channel due to the deformation of a liquid leakage channel from a channel chip of a solid/liquid interface reaction evaluating device. <P>SOLUTION: When the channel chip of the solid/liquid interface reaction evaluating device is pressed against the surface of a solid test sample piece S1 to be evaluated by a pres mechanism 10, a soft member 3, combined with a hard member 1 where a channel 2 is formed, is deformed elastically. By excluding the influence of the irregularities on the surface of the solid test sample piece S1 for adhesion, a channel 2 in contact with the surface of the solid test sample piece S1 is constituted. By making a liquid that containing a tracer substance pass through the channel 2, the concentration of the tracer substance in liquid discharged from the channel is measured by a concentration measuring device D1, thus evaluating the data on the physical properties, such as, the effective diffusion coefficient of a rock, when the solid test sample piece S1 is the rock. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solid-liquid interface reaction evaluation apparatus for measuring an interfacial reaction at an interface between a solid phase and a liquid phase, and a flow chip for solid-liquid interface reaction evaluation used in the apparatus, for example, a liquid phase containing a tracer substance. It belongs to a technical field in which the degree of diffusion and adsorption of the tracer substance in this evaluation object can be evaluated when it is brought into contact with the evaluation object solid phase such as rock.

  Conventionally, as a solid-liquid interface reaction evaluation apparatus, a flow path mechanism is pressed against a solid sample of a solid phase that causes an interface reaction by contacting with a tracer substance in the liquid phase so as to follow the surface of the solid phase. Some are equipped with a channel chip for solid-liquid interface reaction evaluation that forms a channel through which the liquid phase flows by pressing, a measuring instrument that measures a change in the tracer concentration of the liquid phase after contacting the solid phase, and the like.

In this solid-liquid interface reaction evaluation apparatus, as a technique for preventing liquid leakage to the contact surface between the flow path chip having the flow path mechanism and the solid phase, the flow path chip having the flow path mechanism is inserted into the slit having the flow path mechanism. A three-layer flow path consisting of a solid sample, a gasket slit, and a substrate is formed by superimposing the gasket and the substrate, and a liquid phase containing a tracer substance that causes an interface reaction is circulated in the flow path. (For example, see Patent Documents 1, 2, and 3).
Moreover, what is equipped with the packing which prevents a liquid leak with respect to the contact surface of the flow-path chip | tip with this flow-path mechanism and a solid phase is known (for example, refer patent document 4).

JP-A-2005-770 JP-A-2005-315607 JP 2007-333604 A JP 2007-278838 A

  However, in the conventional solid-liquid interface reaction evaluation apparatus, in any case, a channel chip for solid-liquid interface reaction evaluation in which a substrate forming a channel mechanism and a gasket or packing are overlapped is configured. This is a combination of two components, which are brought into close contact with the target solid sample surface by applying an external pressure to the flow channel chip.

  For this reason, when the channel chip is pressed against the solid-phase surface, which is the surface of the solid sample, it is easily affected by the mounting state of the packing and gasket. There is a possibility that the packing at the time of pressing is displaced from the flow path or detached. Further, the flow path is likely to be deformed by being crushed.

  In particular, when the unevenness of the solid phase surface is large, a large external pressure pressing force is required to prevent liquid leakage from the channel chip. As the pressing force increases, the slit of the gasket that forms the channel mechanism The shape of the liquid crystal is likely to be deformed, the volume of the flow path is changed, and further, the flow path formed in the flow path chip may be blocked.

  Accordingly, an object of the present invention is to provide a flow channel chip that can suppress deformation of the flow channel and liquid leakage from the flow channel caused by pressing of the flow channel chip for solid-liquid interface reaction evaluation due to the external pressure of the flow channel. Therefore, a further object is to provide a solid-liquid interface reaction evaluation apparatus using a flow channel chip that can suppress the shape deformation of the flow channel and liquid leakage from the flow channel.

  The flow path chip of the present invention includes a hard member, a soft member that is softer than the hard member, a flow path that is formed on a surface of the hard member and that is open on the surface, and is provided on the hard member. And an inlet communication channel that communicates with the outside of the hard member, and a position that is provided in the hard member and that is away from a connection position between the channel and the inlet communication channel. A solid-liquid interface reaction comprising: an outlet communication channel that communicates with each other; and a liquid leakage suppression mechanism that is configured by projecting from the surface to the hard member so as to surround the flow channel and by disposing the soft member. It is a channel chip for evaluation.

  The solid-liquid interface reaction evaluation apparatus of the present invention includes a facility for pumping a liquid containing a tracer substance to the inlet communication channel of the aforementioned solid-liquid interface reaction evaluation channel chip, and the solid-liquid interface reaction evaluation flow. A concentration measuring device for measuring the concentration of the tracer substance of the liquid flowing out from the outlet channel of the road chip and the solid-liquid interface reaction evaluation channel chip are pressed against the solid surface of the solid-liquid interface reaction evaluation target A solid-liquid interface reaction evaluation apparatus including a flow path pressing mechanism.

  According to the flow path chip for evaluating the solid-liquid interface reaction of the present invention, the deformation of the flow path between the flow path and the solid phase is suppressed by the hard member of the hybrid integrated flow path chip, and further the flow path by the soft member. Since the liquid leakage from the channel is suppressed, the liquid leakage rate and the flow rate capacity change rate necessary for evaluating the reaction at the solid-liquid interface can be kept low.

  In an embodiment of the present invention, the channel chip of the solid-liquid interface reaction evaluation apparatus is a hybrid (composite) in which a single hard member that suppresses deformation of the channel and a soft member that suppresses liquid leakage from the channel chip are combined. ) Integrated channel chip.

  A groove as a flow path is provided in the central portion of the hard member. This groove is opened on the surface of the hard member. The groove-shaped flow path is configured such that a part of the surface of the evaluation object (solid phase) is formed as a part of the flow path wall by closely contacting the flow path chip and the evaluation object (solid phase). A flow path used in the solid-liquid interface reaction evaluation apparatus is formed.

  Furthermore, a mechanism for suppressing liquid leakage from the hybrid-integrated flow channel chip is constructed by rotating a soft material around the flow channel provided in the hard member of the flow channel chip.

  This hybrid-integrated channel chip is provided with an inlet and an outlet for a liquid containing a tracer substance, and is a mechanism capable of supplying a liquid for evaluating a solid-liquid interface reaction mechanism.

  Further, even when the object to be evaluated (solid phase) has a curved shape in a borehole, for example, a liquid containing a tracer substance is formed between the hard member and the borehole inner surface by forming a curved flow path tip. A flow path through is constructed.

  Furthermore, by using a light-transmitting material for each material of the soft member and the hard member of the flow channel chip, the contact portion between the flow channel of the flow channel chip and the solid phase surface, and the liquid and solid phase at that site. The reaction can be observed from the outside of the channel. In particular, it is possible to observe from a remote point by incorporating a solid phase surface observation mechanism such as an optical fiber scope into the flow channel chip so as to capture images of the solid surface and the flow channel side.

  According to the solid-liquid interface reaction evaluation apparatus according to the embodiment of the present invention, the deformation of the flow path between the flow path and the solid phase is suppressed by the hard member of the hybrid integrated flow path chip. Liquid leakage rate <1%, flow rate capacity change rate <1%, acceptable curve diameter required to prevent liquid leakage from the channel and to evaluate the reaction at the solid-liquid interface using the solid surface observation mechanism The fluctuation range> 10% can be sufficiently satisfied.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

(First embodiment)
The first embodiment of the present invention is as follows. FIG. 1 is an exploded view showing the configuration of a hybrid integrated solid-liquid interface reaction evaluation flow path chip used in the solid-liquid interface reaction evaluation apparatus according to the present embodiment.

  As shown in FIG. 1, the hybrid-integrated flow channel chip has a groove-shaped flow channel 2 having a length of 40 mm, a width of 6 mm, and a depth of 200 μm, for example, at the center of the hard member 1. A soft member 3 that prevents liquid leakage from the flow path 2 is combined. The soft member 3 is made of a material that is softer than the hard member 1 and is elastically deformed following the unevenness when pressed against the uneven surface and has good adhesion to the uneven surface.

  As the hard member 1 in which the flow path 2 is formed, a hard member that is not deformed even with a pressure of 1.5 MPa or more, which is a pressing pressure of the flow path chip, is employed. The hard member 1 is a hard resin such as a POM resin (polyoxymethylene / polyacetal), and can prevent the flow path from being deformed by the pressing pressure.

  The soft member 3 is a room temperature curable silicone resin having moderate elasticity, a hardness of about 41 according to JIS-A, and a chemically inert property, for example, PDMS resin (polydimethylsiloxane). It is composed of a soft silicon resin or the like, and has a function of preventing liquid leakage from the flow path 2 when the flow path chip is pressed against the solid surface with a pressure.

  Further, since this hybrid-integrated flow channel chip is arranged on the surface of the evaluation target object that is a solid phase, the shape of the flow channel chip is the surface of the evaluation target object that is a solid phase. It is created in a shape that matches the shape.

  For example, assuming that the inner surface of the borehole is the surface of the object to be evaluated, the hard member 1 and the flow path are also curved with the same radius R as the borehole so as to follow the surface of the borehole. Is adopted. That is, the flow path 2 is formed along the surface of the evaluation object.

  In the hybrid integrated channel chip, a pair of inlet communication pipes 4 and outlet communication pipes 5 are formed as an inlet communication channel and an outlet communication channel so as to communicate with both ends of the channel.

  An inlet pipe T1 and an outlet pipe T2 (see FIG. 1) are connected to the inlet / outlet communication pipes 4 and 5, respectively. The diameter of the inlet / outlet hole is such that the liquid phase pressure loss is small, and the diameter of the flow path where the influence of diffusion of the tracer substance in the communication pipe is as small as possible is 0.5 mmφ, for example. For example, connection construction by the screw connection means 6 is performed.

  Further, in the case of an evaluation object having a flat surface, the flat flow path 2 is formed in accordance with the shape of the flat surface.

  The soft member 3 of the hybrid-integrated flow channel chip of the present invention is assembled around the flow channel 2 processed at the center of the hard member 1 so as to protrude, for example, 5 mm wide and 50 μm higher than the flow channel 2 to prevent leakage. The mechanism is configured.

  For bonding the hard member 1 and the soft member 3, the hard member 1 is subjected to primer treatment (primer treatment) 8 to join the soft member 3 to the surface of the hard member 1. Furthermore, in joining with the soft member 3, the penetration part 9 which processed the screw hole was provided in the base part of the hard member 1, and a part of the soft member 3 was embedded in the penetration part, and the hard member 1 and the soft member 3 of FIG. It has a structure that forms a joint.

  FIG. 2 shows an embodiment of a solid-liquid interface reaction evaluation apparatus using this hybrid-integrated channel chip. In FIG. 2, the same reference numerals as those in FIG. 1 denote the same parts.

  In this hybrid-integrated flow channel chip, the flow channel 2 of the hard member 1 is in contact with the surface of the test sample piece S1, which is a solid evaluation object, so that a part of the test sample piece S1 is opened on the surface of the hard member 1. A wall that closes the opening of the channel 2 is formed.

  Since there is a possibility of leakage of the liquid containing the tracer substance due to the unevenness of the surface of the wall, the flow path chip is pressed against the test sample piece S1 by the flow path chip pressing mechanism 10, and the soft member 3 is elastically deformed. Thus, by removing the influence of the irregularities on the surface of the test sample piece S1 and closely contacting the test sample piece S1, the flow path 2 of the hard member 1 is partially connected to the surface of the solid test sample piece S1. A flow path used for the solid-liquid interface reaction evaluation apparatus as a wall is formed.

  As the channel chip pressing mechanism 10, those found in the above-mentioned patent documents can be adopted.

  In addition, a pump P1 is connected to the inlet pipe T1 to supply a solution containing a tracer substance by pressure feeding to the flow path 2 side. A measuring device D1 for measuring the concentration of the tracer substance in the solution containing the tracer substance is connected to the outlet pipe T2, and the concentration of the tracer substance in the liquid supplied to the flow path and the flow path 2 are passed through. The concentration difference of the tracer substance in the liquid that has been collected is made known.

  FIG. 3 shows the results of evaluating the liquid leakage and the channel deformation rate using this hybrid-integrated channel chip. As a result, the hybrid integrated channel chip of the present invention does not detect a liquid leakage rate at an appropriate pressing pressure of 1.5 MPa or more, and the channel deformation rate is a deformation rate of 1% at which no deformation can be confirmed under any pressure condition. The following good results were obtained.

(Second Embodiment)
The structure of the solid-liquid interface reaction evaluation apparatus according to an example of the second embodiment of the present invention will be described with reference to FIG. The present embodiment is an example in which only the hard member 1 or the soft member 3 and the hard member 1 is made of a material having optical transparency. The same reference numerals as those in FIG. 1 indicate the same parts.

  In the illustration of FIG. 4 according to the present embodiment, an evaluation of contacting the flow path 2 by attaching the incident side portion of the image of the optical fiber scope to the hard member 1 to the hybrid integrated flow path chip of the solid-liquid interface reaction evaluation apparatus. An image observation mechanism on the solid phase surface side of the object is provided.

  The hard member 1 of the hybrid-integrated channel chip of the solid-liquid interface reaction evaluation apparatus is provided with a 0.8φ optical fiber hole 12 into which a direct-view type optical fiber scope 11 can be inserted, and is connected by a connection fitting 13. By embedding the side-view adapter 14 in the member 1, the field of view of the optical fiber scope 11 can be set at an arbitrary position.

  For example, the side-view adapter 14 is a mirror-finished metal material having a horizontal oval shape (major axis: 2 mm, minor axis: 1 mm), and has an angle of 45 degrees with respect to the viewing direction observed by the direct-view optical fiber scope 11. This makes it possible to handle in any direction.

  The side-view adapter 14 has a feature that the observation direction can be easily set by forming a horizontal elliptical shape. On the opposite side of the direct-viewing type optical fiber scope 11, it is connected to the image processing system 15 so that the contact surface of the solid-liquid interface can be directly observed with an image.

  This image processing system also has a function of correcting the occurrence of image reversal caused by using a side-view adapter into an image that has not been reversed in data processing.

  With these mechanisms, it is possible to identify the contact area of the solid-liquid interface, check the contact status, and check for liquid leakage, etc., which has been conventionally possible by having an image observation mechanism on the surface of the solid phase to be evaluated in contact with the flow path 2. Confirmation, reaction status, etc. can be confirmed accurately.

  FIG. 5 shows an example of measurement using the solid-liquid interface reaction evaluation apparatus of the present invention under conditions of high water pressure (5 MPa) simulating the borehole environment and measuring rocks in the deep underground.

  The direct-view optical fiber scope 11 is passed through the pressure-resistant tube 17 through the high pressure test vessel 16 simulating the borehole environment, and connected to the rigid member 1 of the hybrid integrated flow channel chip by the tube fitting 18. To do.

  Further, the high water pressure test vessel 16 and the pressure-resistant tube 17 are similarly connected by a tube fitting 18 so that a pressure boundary can be formed, and an observation mechanism to the evaluation target solid phase surface side that can be used under high water pressure becomes possible. Become.

  With this configuration of solid-liquid interface reaction evaluation device, physical property data of various solid phases can be acquired, especially using heavy water that can be used as a water movement tracer, and analyzing online using a very small device It is possible.

  In addition, by attaching an optical fiber scope that directly observes the state of the solid-liquid interface to the channel chip, the solid-liquid interface reaction can be evaluated even in a very small space such as in a borehole. Other contents are the same as those in the first embodiment.

It is a figure explaining the cross-sectional structure of the flow-path chip | tip for solid-liquid interface reaction evaluation by 1st Embodiment of this invention. It is sectional drawing explaining the use condition of the solid-liquid interface reaction evaluation apparatus using the flow-path chip | tip of FIG. It is a graph explaining the liquid leak rate in the flow-path chip | tip of embodiment of this invention, and a flow-path deformation | transformation rate measurement result. It is a figure explaining the cross-sectional structure of the flow-path chip | tip for solid-liquid interface reaction evaluation by 2nd Embodiment of this invention. It is sectional drawing explaining the use condition of the solid-liquid interface reaction evaluation apparatus using the flow-path chip | tip of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hard member 2 Flow path 3 Soft member 4 Inlet communication pipe 5 Outlet communication pipe 10 Pressing mechanism 11 Optical fiber scope 14 Side view adapter 15 Image processing system T1 Inlet pipe T2 Outlet pipe P1 Pump D1 Concentration measuring device S1 Test specimen

Claims (8)

A hard member;
A soft member softer than the hard member;
A flow path formed on the surface of the hard member and opened in the surface;
An inlet communication channel that is provided in the hard member and communicates between the flow channel and the outside of the hard member;
An outlet communication channel that is provided in the hard member and communicates with the outside of the hard member at a position apart from a connection position between the flow channel and the inlet communication channel;
A liquid leakage suppression mechanism configured to protrude from the surface to the hard member so as to surround the flow path, and to arrange the soft member,
A flow path chip for evaluating a solid-liquid interface reaction.   2. The flow path chip for solid-liquid interface reaction evaluation according to claim 1, wherein the hard member and the soft member are combined such that one member is embedded in the other member.   3. The material according to claim 1, wherein the soft member and the hard member are both light-transmitting materials and have an observation mechanism for a solid phase surface in contact with the flow path. Flow path chip for solid-liquid interface reaction evaluation.   4. The solid-liquid interface reaction evaluation flow path chip according to claim 3, wherein the observation mechanism includes an optical fiber scope in which an end is incorporated in the hard member.   5. The solid-liquid interface reaction evaluation flow channel chip according to claim 4, wherein the hard member is equipped with a side-view adapter that allows incident light from the flow channel side to enter the optical fiber scope. A facility for pumping a liquid containing a tracer substance to the inlet communication channel of the channel tip for solid-liquid interface reaction evaluation according to any one of claims 1 to 5;
A concentration measuring device for measuring the concentration of the tracer substance of the liquid flowing out from the outlet channel of the solid-liquid interface reaction evaluation channel chip;
A flow path pressing mechanism for pressing the solid-liquid interface reaction evaluation flow path chip against the surface of the solid phase of the solid-liquid interface reaction evaluation target;
A solid-liquid interface reaction evaluation apparatus.   6. The solid-liquid interface reaction evaluation channel chip according to claim 6, wherein the solid-liquid interface reaction evaluation channel chip is the solid-liquid interface reaction evaluation channel chip. An apparatus for evaluating a solid-liquid interface reaction, wherein an image processing system that represents an image captured by the optical fiber scope as an image is connected to the fiber scope.   8. The solid-liquid interface reaction evaluation flow channel chip according to claim 7, wherein the solid-liquid interface reaction evaluation flow channel chip is a solid-liquid interface reaction evaluation flow channel chip. A solid-liquid interface reaction evaluation apparatus having a function of correcting an image that has not occurred.

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