JP7656677B2 - Gas permeation cell, sample fixing jig, gas permeability measuring device, and gas permeability measuring method - Google Patents

Description

The present invention relates to a gas permeation cell, a sample fixing jig, a gas permeability measuring device, and a gas permeability measuring method.

When measuring the permeability of gases such as water vapor and oxygen, flat samples such as films and sheets have been the mainstream measurement samples. For example, Patent Document 1 discloses a gas barrier testing method in which a flat sample such as a film is fixed in a curved state and a gas barrier test is performed.

In recent years, gas permeability measurement tests for finished products and other products themselves have become more common. For example, Patent Documents 2 to 4 disclose tools for measuring gas permeability for samples having a three-dimensional shape, such as packaging containers. Patent Document 5 discloses a method for improving the measurement accuracy of gas barrier properties by conditioning a plastic molded body by heating or other methods to remove the effects of moisture before measuring the gas to be measured that has permeated the plastic molded body.

JP 2018-21813 A (published on February 8, 2018) JP 2012-58219 A (Published on March 22, 2012) JP 2006-47257 A (published on February 16, 2006) Japanese Patent Application Publication No. 11-304630 (published on November 5, 1999) International Publication No. WO 2004/077006 (Published September 10, 2004)

When measuring the gas permeability of a sample having a three-dimensional shape, it is necessary to prepare a measurement device dedicated to the sample having that three-dimensional shape. The measurement tools in Patent Documents 2 to 4 may not be able to measure samples of various shapes. Furthermore, Patent Document 5 may be expensive. Furthermore, measurement errors between detectors must be taken into consideration, and it is desirable to develop a device that can measure the gas permeability of samples of various shapes using the same device and detector.

One embodiment of the present invention aims to realize a gas permeation cell that can measure the gas permeability of samples of various shapes.

The inventors discovered that the above object can be achieved by adopting the following configuration, and thus completed the present invention.

That is, the present invention is a gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, the gas permeation cell comprising: a sample fixing jig having a first surface and a second surface and an opening penetrating from the first surface to the second surface, which closes the opening and fixes the sample so that the sample is exposed to both the first surface side and the second surface side; and a detection chamber having a recess surrounding the opening from the second surface side and supplying a detection gas to the inside of the recess, the sample fixing jig being detachably attached to the detection chamber.

The present invention provides a gas permeation cell that can measure the gas permeability of samples of various shapes.

FIG. 1 is a schematic diagram showing an example of a gas permeability measuring device according to an embodiment of the present invention. FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. FIG. 2 is a diagram showing an example of a gas permeation cell according to the present embodiment. FIG. 2 shows an example of a gas permeation cell according to the present embodiments with the supply chamber removed. FIG. 2 is a diagram showing an example of a sample of a gas permeation cell according to the present embodiment. FIG. 2 is a diagram showing an example of a gas permeation cell according to the present embodiment. FIG. 2 is a diagram showing an example of a gas permeation cell according to the present embodiment.

<Gas permeability measuring device 200>
Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1. FIG. 1 is a schematic diagram showing a gas permeability measuring device 200 according to an embodiment. As shown in FIG. 1, the gas permeability measuring device 200 includes a gas permeation cell 100 and a detection unit 13. A storage unit (not shown) for storing the gas permeation cell 100 may be provided. In the gas permeability measuring device 200, when the gas permeation cell 100 is stored, the first surface 1a and the supply chamber 2 are arranged on the upper side of the paper in FIG. 1, and the second surface 1b and the detection chamber 6 are arranged on the lower side of the paper. However, in the gas permeability measuring device according to an embodiment, the gas permeation cell only needs to have a sample fixing jig arranged between the supply chamber and the detection chamber. For example, the detection chamber may be arranged above the supply chamber, and the detection chamber and the supply chamber may be arranged side by side with the sample fixing jig fixed.

Gas Permeation Cell 100
The gas permeation cell 100 comprises a sample fixing jig 1, a supply chamber 2, and a detection chamber 6. The sample fixing jig 1 is disposed between the supply chamber 2 and the detection chamber 6 which is disposed opposite the supply chamber 2, and a sample 10 is fixed to the sample fixing jig 1.

(Sample Fixture 1)
As shown in FIG. 1, the sample fixing jig 1 has a first surface 1a, a second surface 1b, and an opening (the inner surface of the opening is referred to as a third surface 1c). The sample fixing jig 1 is preferably a flat plate-shaped jig (member) in which the first surface 1a and the second surface 1b are parallel to each other, and an opening penetrating from the first surface 1a to the second surface 1b is provided near the center of the plate-shaped jig, and the peripheral portion of the first surface 1a closes the opening of the supply recess 5 of the supply chamber 2, and the peripheral portion of the second surface 1b closes the opening of the recess 9 of the detection chamber 6. The sample fixing jig 1 is detachably attached to the detection chamber 6. Since the sample fixing jig 1 is detachable from the detection chamber 6, it is only necessary to replace the sample fixing jig 1 according to the shape and size of the sample, and there is no need to prepare a measuring device dedicated to the sample. The material of the sample fixing jig 1 may be a material having a lower gas permeability than the sample, for example, metal and ceramics.

In the example of FIG. 1, the sample fixing jig 1 has an opening that penetrates (communicates) from the first surface 1a to the second surface 1b. The sample 10 is fixed to the opening of the sample fixing jig 1 so as to close the opening. The sample 10 and the third surface 1c of the opening need only be fixed without any gaps, and for example, adhesive, grease, sealant (not shown), etc. may be filled into the gap between the sample 10 and the third surface 1c.

The sample fixing jig 1 is removably fixed to the detection chamber 6 so that the sample 10 is exposed to both the first surface 1a side (supply recess 5 side) and the second surface 1b side (recess 9 side) when the opening 1c of the sample fixing jig 1 is blocked by the sample 10. In this state, the gas permeation cell 100 is separated from the supply recess 5 (first space) and the recess 9 (second space) of the gas permeation cell 100 fixed to the sample fixing jig 1.

With the above configuration, the sample 10 fixed to the sample fixing jig 1 can be exposed to the target gas (gas, first gas) on the first surface 1a side (supply recess 5 side) and simultaneously exposed to the detection gas (second gas) on the second surface 1b side (recess 9 side).

(Supply Chamber 2)
The supply chamber (gas supply chamber) 2 has a supply recess 5 therein to which a target gas is supplied. The supply chamber 2 is attached so that the supply recess 5 surrounds the opening 1h from the first surface 1a side of the sample fixing jig 1, and the opening of the supply recess 5 is closed by the sample fixing jig 1.

Target gases include gases that contain the target components to be measured. Examples of target gases include inorganic gases such as water vapor, oxygen, nitrogen, helium, hydrogen, argon, carbon dioxide, and carbon monoxide; organic gases such as methane; etc.

The supply recess 5 is provided with a first supply port 3 for supplying the target gas and a first exhaust port 4 for exhausting the target gas. The first supply port 3 and the first exhaust port 4 may each be provided at the top or side of the supply recess 5. In addition, the first supply port 3 and the first exhaust port 4 may each be one or multiple.

In the example of FIG. 1, the target gas is supplied from the first supply port 3 of the supply recess 5 in the direction of the arrow 12a, filling the supply recess 5 with the target gas. The target gas is then exhausted from the first exhaust port 4 of the supply recess 5 in the direction of the arrow 12b. At this time, inside the supply recess 5, the sample 10 exposed on the first surface 1a side of the sample fixing jig 1 is exposed to the target gas. In the example of FIG. 1, the target gas is supplied in the direction of the arrow 12c. Also, the gas that has permeated the sample 10 reaches in the direction of the arrow 12d.

(Detection Chamber 6)
The detection chamber (detection gas chamber) 6 includes a recess 9 surrounding the opening from the second surface 1b side of the sample fixing jig 1. The recess 9 of the detection chamber 6 is provided at a position facing the supply recess 5 with the sample 10 in between. A detection gas is supplied to the inside of the recess 9 of the detection chamber 6. At this time, inside the recess 9 of the detection chamber 6, the sample 10 exposed to the second surface 1b side of the sample fixing jig 1 is exposed to the target gas.

The detection gas may be a carrier gas that carries the target gas and the target component contained in the target gas to the detection unit. The carrier gas is not particularly limited as long as it is inert to the target gas containing the target component to be measured. Examples of the carrier gas include nitrogen, argon, helium, oxygen, and other gases. In addition, in a gas permeability measurement device equipped with a gas permeation cell according to one embodiment, instead of filling the recess 9 with the detection gas, the inside of the recess 9 may be placed in a vacuum state to evaluate the gas permeability.

The recess 9 of the detection chamber 6 is provided with a second supply port 7 for supplying the detection gas and a second exhaust port 8 for discharging the detection gas. The second supply port 7 and the second exhaust port 8 may each be provided at the bottom or side of the recess 9. In addition, the number of the second supply port 7 and the second exhaust port 8 may each be one or more.

In the example of FIG. 1, the detection gas is supplied from the second supply port 7 of the recess 9 in the direction of the arrow 12e, filling the recess 9 with the detection gas. The detection gas is then exhausted from the second exhaust port 8 of the recess 9 in the direction of the arrow 12f. The second exhaust port 8 is connected to the detection unit of the gas permeability measuring device 200. In the example of FIG. 1, the target gas is supplied in the direction of the arrow 12c, and after passing through the sample 10, it reaches the direction of the arrow 12d, and reaches the detection unit 13 via the second exhaust port 8 together with the detection gas.

[Sample 10]
The sample 10 may be a flat sample or a three-dimensional sample. The sample fixing jig 1 may be replaced according to the shape of the sample 10, and samples of different shapes can be measured without changing the volume of the gas permeation cell 100. The sample fixing jig 1 can be replaced easily and quickly, at low cost, and samples of various shapes can be measured. Furthermore, the gas permeation cell 100 according to this embodiment makes it possible to compare the gas permeability of the product itself with the gas permeability of the components that make up the product.

[Detection unit 13]
The detection unit (detector) 13 detects the target component that has permeated the sample and reached the detection chamber 6. That is, the detection unit 13 detects the target gas (target gas) that has permeated the sample from the supply recess 5 and reached the recess 9. The detection unit 13 may be any one that can detect the target gas carried by the carrier gas, and a known detection means may be appropriately selected according to the detection target. For example, when water vapor is detected as the target gas, a known moisture meter may be used as the detection unit 13. Other examples of the detection unit include detection devices such as atmospheric pressure ionization mass spectrometers, mass spectrometers, oxygen concentration meters, dew point meters, gas sensors, detector tubes, and infrared absorption spectrometers. The detection unit further includes a gas collection kit for collecting the target component contained in the detection gas, and the target component collected by the gas collection kit may be detected by GC-MS (gas chromatography-mass spectrometry), HPLC (high performance (high pressure) liquid chromatography), and IC (ion chromatography).

The gas permeability measuring device 200 includes a gas permeation cell 100. With the gas permeation cell 100 housed inside, the gas permeability measuring device 200 detects the target gas (target gas) that has permeated the sample 10 using the detection unit 13, and measures the permeability of the sample to the target gas. With the gas permeation cell 100 housed inside, the gas permeability measuring device 200 may include an adjustment unit (not shown) that adjusts the temperature, humidity, etc. inside the supply recess 5 and the recess 9.

The gas permeability measuring device 200 can be used in the gas permeation cell 100 by simply replacing the sample fixing jig depending on the shape and size of the sample, and does not require a dedicated measuring device for the sample. Therefore, it is highly versatile.

The gas permeability measuring device 200 may be provided with a moving part (not shown) for moving at least one of the supply chamber 2 and the detection chamber 6 to which the sample fixing jig 1 to which the sample is fixed is fixed, so as to open the supply recess 5 surrounding the opening 1c from the first surface 1a side. By providing the moving part, the supply chamber can be easily removed from the gas permeability cell when measuring the gas permeability of the sample while applying a load to the sample.

<Gas permeability measurement method>
The gas permeability measurement method according to this embodiment includes a detection step of supplying a target gas to the gas permeation cell 100 and detecting a target component that has permeated the sample and reached the detection chamber 6. By using the gas permeation cell 100, it is possible to measure the gas permeability of samples of various shapes. Therefore, the scope of the present invention also includes a method of measuring gas permeability using a gas permeation cell according to one embodiment of the present invention.

<Sample Fixing Tool According to Another Embodiment>
The gas permeation cell according to this embodiment and the sample fixing jig included in the gas permeation cell are not limited to the above-mentioned embodiment. An example of fixing to the sample fixing jig will be described below with reference to Figures 2 to 6. Figures 2 to 6 are schematic diagrams showing the sample fixing jig to which the sample is fixed.

[Sample Fixture 11]
2, the side surface of the cylindrical sample 20 is fixed to the inside of the opening 11h of the sample fixing jig 11. That is, the sample 20 is fixed to the third surface 11c of the sample fixing jig 11 by the sample fixing auxiliary member 14. The first surface 11a of the sample fixing jig 11 is exposed to the supply recess 5 side, and the second surface 11b is exposed to the recess 9 side. This fixation separates the supply recess 5 and the recess 9 of the gas permeation cell 100.

(Sample fixing auxiliary member 14)
The sample fixing auxiliary member 14 fixes the sample 20 to any one of the first surface 11a, the second surface 11b, and the third surface 11c of the opening 11h of the sample fixing jig. Examples of the sample fixing auxiliary member 14 include a packing and a plate such as a metal plate that can be fitted into the opening 11c.

In the example shown in FIG. 2, the third surface 11c of the sample fixing jig 11 is inclined at an acute angle with respect to the second surface 11b. This configuration makes it easier to fix the sample 20 to the third surface 11c via the sample fixing auxiliary member 14.

The third surface 11c of the opening 11h may have a tap (thread, not shown), and the side of the sample fixing auxiliary member 14 may have a thread (not shown) so that it can be screwed into the tap. By using such a sample fixing auxiliary member 14, the sample can be firmly fixed by the sample fixing jig 11, and the opening 11h can be blocked by the sample 20. For example, the third surface 11c constituting the opening 11h and the side of the sample fixing auxiliary member 14 may be formed with high surface accuracy so that when the opening 11h is blocked by the sample fixing auxiliary member 14, the third surface 11c and the side of the sample fixing auxiliary member 14 are attracted to each other, thereby forming a seal.

[Sample fixing jig 21]
3, the sample fixing jig 21 fixes the sample 30 by the sample fixing auxiliary member 24 so that the sample 30 is disposed inside the supply recess 5 on the first surface 21a side, and at this time, the sample 30 is exposed from the inside of the opening 21h toward the second surface 21b side. The sample 30 is fixed so as to cover the opening 21h of the sample fixing jig 21, and the supply recess 5 (first surface 21a side) and the recess 9 (second surface 21b side) of the gas permeation cell 100 are separated.

(Sample fixing auxiliary member 24)
In the example of Fig. 3, the sample 30 is fixed to the first surface 21a of the sample fixing jig 21 by the sample fixing auxiliary member 24. The sample fixing auxiliary member 24 may be a metal plate having an annular structure so that the sample 30 can be exposed to the target gas. The sample fixing auxiliary member 24 and the sample fixing jig 21 are fixed to the sample fixing jig 21 so as to sandwich the sample 30 with an annular packing 24a disposed between the sample fixing auxiliary member 24 and the sample 30 and an annular packing 24b disposed between the sample fixing jig 21 (first surface 21a) and the sample 30, and the sample 30 is sandwiched between the sample fixing auxiliary member 24 and the sample fixing jig 21 by tightening the bolt (auxiliary member fixing device) 15.

[Sample fixing jig 31]
4, in the sample fixing jig 31, the sample 40 is sandwiched between the sample fixing jig 31 and a sample fixing auxiliary member 34 such as a metal plate, and the sample fixing jig 31, and the sample 40 is sandwiched by tightening a bolt (auxiliary member fixing member) 25. The sample 40 is a sample having an annular structure such as a gasket, and the sample 40 is fixed so that the outer peripheral surface of the annular structure is exposed on the groove portion 31i side of the sample fixing jig 31 and the inner peripheral surface of the annular structure is exposed on the third surface 31l side of the sample fixing jig 31. Furthermore, by this fixation, the opening 31h is blocked by the sample fixing auxiliary member 34 and the sample 40. This separates the supply recess 5 and the recess 9 of the gas permeation cell 100.

The sample fixing auxiliary member 34 is fixed to the lower surface 31e of the sample fixing jig 31 by the bolt 25. The auxiliary member fixing member 25 is provided between the sample 40 and the step surface 31d. The sample 40 is provided on the lower surface 31e. By providing the groove portion 31i in the sample fixing jig 31, at least a part of the sample 40 is fixed inside the groove portion 31i of the sample fixing jig 31, so that even if the sample 40 has a thickness, the sample 40 can be prevented from interfering with the supply chamber in the gas permeation cell.

[Sample fixing jig 41]
As an example in FIG. 5, an O-ring joint including an O-ring 50, a blind nut 44, and a body portion 54 is fixed to a sample fixing jig 41 by, for example, welding.

In the sample fixing jig 41, the O-ring 50 is placed in the body part 54 of the O-ring joint and fixed to the sample fixing jig 41, and the gas permeability evaluation can be performed with the inside of the O-ring 50 sealed with the blind nut 44. Here, the O-ring 50 is exposed to the second surface 41b side of the sample fixing jig 41 and fixed so as to be exposed to the detection gas introduced from the opening 41h of the sample fixing jig 41. In addition, the O-ring 50 is exposed to the first surface 41a side of the sample fixing jig 41 in the gap between the body part 54 and the blind nut 44 while covered by the blind nut 44, and is exposed to the target gas. In other words, the O-ring fitting is put into a state in which it can be used as a product, and the total of (i) the target gas that has permeated through the O-ring 50 itself, (ii) the target gas that has leaked (emitted) from the gap between the body portion 54 and the O-ring 50, and (iii) the target gas that has leaked from the gap between the blind nut 44 and the O-ring 50 in the O-ring fitting can be detected, and the degree of permeation and leakage of the target gas can be evaluated based on the total of the detected target gases. Thus, gas permeation can be evaluated in an actual usage environment.

In addition, for example, by opening the supply chamber 2 during the gas permeability evaluation test and changing the tightening torque of the blind nut 44, it is possible to evaluate the change in the degree of permeability and leakage of the target gas through the O-ring fitting that accompanies the change in torque.

[Sample fixing jig 51]
As an example of Fig. 6, the O-ring 50 is covered by a blind nut 44 having an opening in the sample fixing jig 51, and the gas permeability is evaluated in a state where the opening of the blind nut 44 is blocked by a leak test material 16. Here, the O-ring 50 is fixed so as to be exposed to the second surface 51b of the sample fixing jig 51 and exposed to the detection gas. In addition, the O-ring 50 is exposed to the first surface 51a of the sample fixing jig 51 in the gap between the body part 54 and the blind nut 44 in a state where it is covered by the blind nut 44, and is exposed to the target gas. That is, the O-ring joint is placed in a state where it can be used as a product, and the total of (i) the target gas that has permeated through the O-ring 50 itself, (ii) the target gas that has leaked (leaked) from the gap between the body part 54 and the O-ring 50, and (iii) the target gas that has leaked from the gap between the blind nut 44 and the O-ring 50 can be detected, and the degree of permeation and leakage of the target gas can be evaluated based on the total of the detected target gases. This makes it possible to evaluate gas permeability in the actual usage environment.

In addition, by providing a leak test material 16, for example, by opening the supply chamber 2 during the gas permeability evaluation test and changing the tightening torque of the blind nut 44, it is possible to evaluate the change in the degree of permeability and leakage of the target gas through the O-ring joint that accompanies the change in torque, in the same way as in the case of the sample fixing jig 41. Examples of the leak test material 16 include test materials that are impermeable, such as metal rods and glass rods.

<Gas permeation cell according to another embodiment>
The sample fixing jig 1 only needs to be fixed in an airtight manner to each of the supply chamber 2 and the detection chamber 6. For example, in the example of Fig. 7, the sample fixing jig 1 is fixed by a plurality of jig fixing members 17 at the peripheral portion of the supply chamber 2 and the peripheral portion of the detection chamber 6.

In the example of FIG. 7, the two jig fixing members 17 may be bolts that penetrate the side wall of the supply recess 5 from outside the supply chamber 2 and fix the supply chamber 2 and the sample fixing jig 1. The two jig fixing members 17 may also be bolts that penetrate the side wall of the recess 9 in the detection chamber 6 and fix the detection chamber 6 and the sample fixing jig 1. Examples of jig fixing members other than bolts include clamps, etc. By fixing the sample fixing jig 1 with the jig fixing members 17, it can be fixed to the supply chamber 2 and the detection chamber 6 easily and with high airtightness.

In the example of FIG. 8, the sample fixing jig 1 is fixed to the detection chamber 6 by the jig fixing member 17. With the sample fixed to the gas permeation cell 100, the supply chamber 2 is removed (open). When the supply chamber 2 is removed (open), as described below, a load is applied to the sample 10, and the gas permeability of the sample 10 after the load is applied can be measured.

In addition, since the supply chamber 2 can be removed while the sample is fixed in the gas permeation cell 100, the gas permeation of the sample when exposed to the atmosphere can be evaluated. It can also be compared with the gas permeation of a sample that is not exposed to the atmosphere.

<Fixation of syringe 60 by gas permeation cell 100>
The gas permeation cell 100 according to the present embodiment can measure the gas permeation of a syringe (sample) 60 shown in Fig. 9. Conventional gas permeation cells or gas permeability measuring devices can only measure the gas permeation of the entire syringe. Furthermore, conventional techniques cannot perform background measurements, which will be described later.

(Syringe 60)
In the case of the gas permeation cell 100 according to the present embodiment, as in the example of FIG. 10, the gas permeation of the syringe 60 (the syringe body 62, the cap 65, and the connection part 66) in a state where the plunger 63 is removed can be evaluated. The connection part 66 can be, for example, a resin or glass connection part such as a syringe needle. For example, the resin or glass connection part may be integrally molded with the syringe 60, and when the connection part 66 is made of resin, a thread that screws with the cap 65 may be provided. Also, as in the example of FIG. 11, the gas permeation of the syringe 60 (the syringe body 62, the plunger 63, and the connection part 66) in a state where the cap 65 is removed can be evaluated. Moreover, by using the gas permeation cell 100 according to the present embodiment, the gas permeation evaluation of the syringe can be performed in a shorter time than in the past.

In the example of Figures 10 and 11, the side of the syringe body 62 is fixed to the inside of the opening 61h of the sample fixing jig 61. In other words, the syringe 60 is fixed to the third surface 61c of the sample fixing jig 61 by a sample fixing auxiliary member 64 such as a rubber packing.

In addition, by changing the orientation and fixing position of the syringe 60 fixed to the sample fixing jig 61, it is possible to measure the gas permeability of the area where gas permeation is to be evaluated.

<Gas permeability measurement method according to another embodiment>
The gas permeability measurement method according to the embodiment is not limited to the above embodiment. For example, in the gas permeability measurement method according to the present embodiment, the target component that has reached the detection chamber 6 may be measured while applying a load to the sample in the detection step.

As shown in FIG. 8, in a gas permeability measurement method according to another embodiment, the supply chamber 2 in the gas permeability cell 100 is removed (opened) in the gas permeability measurement device 200. This allows a load to be applied to the portion of the sample 10 fixed to the gas permeability cell 100 that is exposed to the first surface 1a. Examples of loads include changing the torque; applying vibration, scratches, light, heat, etc.; immersion in liquids such as salt water, organic solvents, hot water, and corrosive liquids; contact with solids such as ice and metal; etc.

That is, in the gas permeability measurement method according to another embodiment of the present invention, a multi-stage evaluation of the sample under various environmental conditions is possible by measuring the target components that reach the detection chamber 6 while applying a load to the sample 10 in the detection process. For example, it is possible to measure the change in gas permeability that accompanies the change in shape caused by applying a load to the sample.

[Gas permeability measurement method according to still another embodiment]
The gas permeability measurement method according to still another embodiment of the present invention may include a step other than the detection step. The other step includes a background measurement step.

(Background measurement process)
In the background measurement step, before exposing the sample to the target gas, the sample is exposed to a detection gas from at least one of the first surface 1a side and the second surface side, and the amount of the target component contained in the detection gas supplied into the detection chamber 6 is measured. By performing the background measurement step, the accuracy of the gas permeation measurement is improved.

〔summary〕
The gas permeation cell according to this embodiment is a gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, and comprises a sample fixing jig having a first surface and a second surface and an opening penetrating from the first surface to the second surface, which closes the opening and fixes the sample so that the sample is exposed to both the first surface side and the second surface side, and a detection chamber (detection gas chamber) having a recess surrounding the opening from the second surface side and supplying a detection gas to the inside of the recess, and the sample fixing jig is detachably attached to the detection chamber.

The gas permeation cell according to this embodiment may further include a sample fixation auxiliary member for fixing the sample to the inside, the first surface side, or the second surface side of the opening.

The gas permeation cell according to this embodiment further includes a supply chamber (gas supply chamber) that supplies the gas, and the supply chamber has a supply recess inside to which the gas is supplied, and the supply chamber may be removably attached so as to surround the opening from the first surface side and close the supply recess.

In the gas permeation cell according to this embodiment, the sample fixing jig may be fixed to at least one of the detection chamber and the supply chamber by a jig fixing member.

In the gas permeation cell according to this embodiment, the sample may be a syringe.

The sample fixing jig according to this embodiment is a sample fixing jig that is detachably attached to the gas permeation cell, has a first surface and a second surface, and an opening that penetrates from the first surface to the second surface, closes the opening, and fixes the sample so that the sample is exposed to both the first surface side and the second surface side.

The gas permeability measuring device according to this embodiment also includes the gas permeation cell and a detection unit that detects the target component that has permeated the sample and reached the detection chamber.

The gas permeability measurement method according to this embodiment includes a detection step of supplying the gas to the gas permeation cell and detecting the target component that has permeated the sample and reached the detection chamber.

In the gas permeability measurement method according to this embodiment, in the detection step, the target component that reaches the detection chamber may be measured while applying a load to the sample.

The gas permeability measurement method according to this embodiment may include a background measurement step in which, before exposing the sample to the gas, the sample is exposed to the detection gas from both the first surface side and the second surface side, and the amount of the target component contained in the detection gas supplied into the detection chamber is measured.

The gas permeability measuring device according to this embodiment may include a storage section for storing the gas permeation cell, a moving section for moving the supply chamber so as to open the supply recess surrounding the opening from the second surface side, and a detection section for detecting the target component that has permeated the sample and reached the detection chamber.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Furthermore, new technical features can be formed by combining the technical means disclosed in the respective embodiments.

The present invention can be used in a wide range of fields that require the measurement of gas permeability, including food, medicine, organic electroluminescence devices, and solar cells.

1, 11, 21, 31, 31a, 31b, 41, 51, 61 Sample fixing jig 1a, 11a, 21a, 31j, 41a, 51a, 61a First surface 1b, 11b, 21b, 31k, 41b, 51b, 61b Second surface 1c, 11c, 21c, 31l, 41c, 51c, 61c Third surface 1h, 11h, 21h, 31h, 41h, 51h, 61h Opening 2 Supply chamber (gas supply chamber)
3 First supply port 4 First exhaust port 5 Supply recess 6 Detection chamber (detection gas chamber)
7 Second supply port 8 Second exhaust port 9 Recess 10, 20, 30, 40, 50 Sample 12a to 12f Gas 13 Detection section 14, 24, 34, 44 Sample fixing auxiliary member 15, 25 Auxiliary member fixing tool 16 Leak test material 17 Jig fixing member 31d Step surface 31e Lower surface 31i Groove portion 54 Body portion 60 Syringe (sample)
62 Syringe body 63 Plunger 65 Cap 66 Connection part 100 Gas permeation cell 200 Gas permeability measuring device

Claims (9)

A gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, comprising:
a sample fixing jig having a first surface and a second surface and an opening penetrating from the first surface to the second surface, the opening being closed by the sample, a sample fixing auxiliary member and the sample fixing jig, and the sample fixing jig fixing the sample so that the sample is exposed to both the first surface side and the second surface side;
a sample fixing auxiliary member for fixing the sample to either the first surface side or the second surface side;
a detection chamber having a recess surrounding the opening from the second surface side and supplying a detection gas to the inside of the recess,
The sample is a sample having a cyclic structure,
The sample fixing auxiliary member includes a metal plate and a bolt,
the sample having the annular structure is sandwiched between the metal plate and the sample fixing jig, and the sample having the annular structure is fixed so as to be sandwiched by tightening the bolt;
the sample fixing jig is detachably attached to the detection chamber,
Further comprising a supply chamber for supplying the gas,
the supply chamber has a supply recess therein to which the gas is supplied,
the supply chamber is detachably attached to the gas permeation cell so as to surround the opening from the first surface side and close the supply recess . A gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, comprising:
a sample fixing jig having a first surface and a second surface and an opening penetrating from the first surface to the second surface, the opening being closed by the sample and an O-ring joint having a blind nut and a body portion , and fixing the sample so that the sample is exposed to both the first surface side and the second surface side;
a detection chamber having a recess surrounding the opening from the second surface side and supplying a detection gas to the inside of the recess,
the sample fixing jig is detachably attached to the detection chamber,
The sample is an O-ring.
a body portion of an O-ring joint having a blind nut and a body portion is fixed to the sample fixing jig so as to communicate with the opening portion;
Further comprising a supply chamber for supplying the gas,
the supply chamber has a supply recess therein to which the gas is supplied,
the supply chamber is detachably attached so as to surround the opening from the first surface side and close the supply recess;
Gas permeation cells. The sample fixture further includes a leak test material,
The blind nut has an opening,
3. The gas permeation cell according to claim 2, wherein an opening of the blind nut is closed with the leak test material. 2. The gas permeation cell of claim 1 , wherein the sample fixture is fixed to at least one of the detection chamber and the supply chamber by a fixture fixing member. A gas permeation cell according to any one of claims 1 to 4 ;
and a detection section for detecting a target component that has permeated the sample and reached the detection chamber. A gas permeability measurement method comprising the steps of: supplying the gas to the gas permeation cell according to any one of claims 1 to 4 ; and detecting the target component that has permeated the sample and reached the detection chamber. 7. The gas permeability measurement method according to claim 6 , wherein in the detection step, the target component that reaches the detection chamber is measured while a load is being applied to the sample. 8. The gas permeability measurement method according to claim 7, further comprising a background measurement step of exposing the sample to the detection gas from both the first surface side and the second surface side before exposing the sample to the gas, and measuring the amount of the target component contained in the detection gas supplied into the detection chamber . A storage section for storing the gas permeation cell according to claim 1 ;
a moving unit that moves the supply chamber so as to open the supply recess surrounding the opening from the second surface side;
and a detection section for detecting a target component that has permeated the sample and reached the detection chamber.

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