KR101796829B1 - Composite for sweat pore detection sensor using water-soluble polymer compound indicative of change in color or structure by reacting with sweat gland secretion, thin film using the same and manufacturing method thereof - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a composition for a pore detection sensor, a thin film using the same and a method for producing the same, and more particularly, to a composition for a pore detection sensor using a water-soluble polymer compound that reacts with sweat gland secretions to exhibit color or structure change, Film and a manufacturing method thereof.
According to the present invention, it is possible to easily detect the positions and patterns of pores through changes in color or structure appearing in response to secretion of sweat glands. In addition, the present invention recognizes the positions and patterns of pores through changes in color or structure, and amplifies and displays the positions and patterns of the pores to display the map of pores.
In addition, according to the present invention, the distribution of pores distributed in the fingerprint ridge can be segmented and recognized, and the fingerprint recognition rate can be drastically increased by comparing and analyzing the characteristic points of the pore through only a small fraction of the fingerprint collection.
In addition, the present invention detects moisture, amino acid, ion component, and the like secreted from sweat glands on the surface of the skin (fingers, etc.), thereby detecting changes in sweat secretion amount or secretion composition that are generated when an anomaly occurs in a human body, It can be used for health status analysis.

Description

Technical Field The present invention relates to a composition for a pore detection sensor using a water-soluble polymer compound that exhibits color or structure change by reacting with sweat gland secretion, a thin film using the same, and a method for producing the same. BACKGROUND ART BY REACTING WITH SWEAT GLAND SECRETION, THIN FILM USING THE SAME AND MANUFACTURING METHOD THEREOF}

TECHNICAL FIELD The present invention relates to a composition for a pore detection sensor, a thin film using the same and a method for producing the same, and more particularly, to a composition for a pore detection sensor using a water-soluble polymer compound that reacts with sweat gland secretions to exhibit color or structure change, Film and a manufacturing method thereof.

Fingerprint recognition has been used in criminal investigations to capture criminals for centuries. Fingerprint recognition technology is becoming more and more developed and is not confined to criminal investigation, but it is in the trend of expanding its range of applications such as identity verification and access control system. Nowadays, as the recognition of security and personal authentication becomes stronger, fingerprint recognition is used more easily in smart phones and electronic devices that we use in everyday life.

But as the technology of fingerprint recognition develops and gets closer to us, the method of counterfeiting it is getting more and more developed. In order to avoid this, a variety of recognition technologies such as iris recognition, voice recognition, and face recognition have been developed. However, this is a new direction to the fingerprint recognition that has been studied so far, and there is a drawback in using the fingerprint recognition technology as it is.

Therefore, new fingerprint recognition technology is needed to complement existing fingerprint recognition technology. According to the researches so far, the method of fingerprint recognition is divided into three stages according to the degree of difficulty. The first is the method of analyzing the ridge pattern of the fingerprint, the second is the method of analyzing the bifurcation and the end point where the ridge is divided and merged, and the third is the method of analyzing the pattern of the pores distributed on the ridge. As the stages get higher, fingerprints and high-resolution analysis equipment become necessary. Currently, the technique used as fingerprint recognition technology is in the second stage. The third step requires expensive equipment and is not easy to use because it is not easy to get delicate fingerprints from fingerprint providers.

In order to solve the above problems, the present invention proposes various methods for analyzing the pseudo-pouch map, which is the third step only with the existing fingerprint analysis equipment. The only way to obtain a map of the pores using existing chemicals is the "Hydrochromic conjugated polymers for human sweat pore mapping" method (Nature Communications 5, Article number: 3736), which was previously studied in this laboratory.

Korean Patent Publication No. 10-2010-0075224

The present invention provides a composition for a pore detection sensor sensitive to secretions of sweat glands and a thin film using the same, and provides a method for detecting a pore map by detecting the pore distribution using the composition. The present invention also provides a method for producing the thin film for a porthole detection sensor and a use thereof.

The present invention provides a composition for a porthole detection sensor comprising a water-soluble polymer compound that reacts with glandular secretion to exhibit color and / or structural change.

The sweat gland secretion may include moisture, amino acid, salt, and the like.

The water-soluble polymer compound may include at least one member selected from the group consisting of an acrylic polymer, a vinyl polymer, a cellulose derivative, an alkylene polymer, a glycol polymer, a urea polymer, a melamine polymer and an epoxy polymer.

Preferably, the polymer is a polymer having -OH, -CONH ₂ , COC, COO or the like, which is a nonionic functional group having high hydrophilicity, and is a polymer having a functional group capable of hydrophilic action with respect to the number of carbon atoms in a ratio of 2: May contain at least one member selected from the group consisting of polyacrylic acid, polyacrylic acid, polyvinyl alcohol, polyamide, polyethylene oxide, starch, agarose gel and the like, but polyvinylpyrrolidone or polyacrylic acid Lt; / RTI >

The water-soluble or hydrophilic polymer easily absorbs moisture from the sweat components discharged from the pores, so that the reactivity of the sensor material is improved and a high-quality image of the pores in the pores can be obtained.

The polyvinylpyrrolidone (PVP) and the polyacrylic acid (PAA) are represented by the following formula (1).

[Chemical Formula 1]

In the above formula, (a) is polyvinylpyrrolidone and (b) is polyacrylic acid.

The composition for the porthole detection sensor may further comprise water or an organic solvent.

The organic solvent may be at least one selected from the group consisting of alcohols (methanol, ethanol, etc.), chloroform, dichloromethane, dimethylformamide (DMF), hexane, benzene, toluene, dioxane, N-methylpyrrolidone (NMP), acetonitrile (THF), dimethyl sulfoxide (DMSO), acetone, and the like. However, the solvent is not limited to the above, and methanol, ethanol, DMF and DMSO are preferably used as long as they can dissolve the water-soluble polymer.

The composition for a porthole detection sensor may comprise 0.01 to 40% by weight, more preferably 5 to 20% by weight, of the water-soluble polymer compound based on the total weight of the composition for a porthole detection sensor, May contain 15% by weight. When the above range is maintained, it is preferable from the viewpoint of having a suitable viscosity for spin coating, and a coating layer having an appropriate thickness can be formed at a minimum number of coatings when a thin film (see below) is manufactured using the composition .

The present invention also relates to a thin film base material; And a coating layer formed on the thin film base material, wherein the coating layer comprises a water-soluble polymer compound that reacts with glandular secretion to exhibit color and / or structural changes.

The sweat gland secretion may be moisture, amino acid or salt.

The thin film for a porthole detection sensor may be reversibly used repeatedly.

In the present invention, the base material can be used in the same sense as a support, a substrate and the like.

As the thin film base material (or the substrate or the support), a glass plate, a plastic substrate, a paper, a metal substrate, a coated support, or the like may be used.

In order to detect pores using the thin film, sweat gland secretion secreted from the pores must react with the thin film. When a thin film comprising the water-soluble polymer is used, when a fingerprint is taken on the thin film The surface of the thin film is dissolved by the moisture released from the pore hole, leaving a trace, so that the pore can be easily detected.

The above-mentioned water-soluble polymer compound can be used as the above-mentioned water-soluble polymer compound, preferably a polymer having -OH, -CONH ₂ , COC or COO, which is a nonionic functional group having high hydrophilicity. At least one member selected from the group consisting of polyvinylpyrrolidone, polyacrylic acid, polyvinyl alcohol, polyamide, polyethylene oxide, starch, agarose gel and the like having a functional group capable of being present in a ratio of 2: , But polyvinylpyrrolidone or polyacrylic acid may be most preferred.

The present invention also relates to a method for preparing a solution composition, comprising the steps of: (a) preparing a solution composition by dissolving a water-soluble polymer compound, which exhibits color and / or structural change, in water or an organic solvent by reacting with sweat gland secretion; And a step (b) of coating the solution composition prepared in the step on a base material. The sweat gland secretion may be moisture, amino acid or salt.

The above-mentioned water-soluble polymer compound can be used as the above-mentioned water-soluble polymer compound, preferably a polymer having -OH, -CONH ₂ , COC or COO, which is a nonionic functional group having high hydrophilicity. At least one member selected from the group consisting of polyvinylpyrrolidone, polyacrylic acid, polyvinyl alcohol, polyamide, polyethylene oxide, starch, agarose gel and the like having a functional group capable of being present in a ratio of 2: , But polyvinylpyrrolidone or polyacrylic acid may be most preferred.

The organic solvent may be at least one selected from the group consisting of alcohols (methanol, ethanol, etc.), chloroform, dichloromethane, dimethylformamide, hexane, benzene, toluene, dioxane, N-methylpyrrolidone, acetonitrile, tetrahydrofuran, dimethylsulfoxide, And the like. However, it is not limited thereto, and it may be used without particular limitation as long as it can dissolve the water-soluble polymer. However, it is more preferable to use methanol, ethanol, DMF, DMSO.

As the thin film base material (or the substrate or the support), a glass plate, a plastic substrate, a paper, a metal substrate, a coated support, or the like may be used.

The coating may be performed by a method selected from the group consisting of spin coating, inkjet printing, doctor blade, and dip-pulling method, and most preferably, spin coating.

After the step (b)

(C) drying at 60 to 80 ° C for 5 to 30 minutes. The step (c) may preferably be a step of drying at 70 DEG C for 5 to 30 minutes. The range of the temperature at the time of drying should be kept within a temperature range in which the polymer is not decomposed. The drying time is not particularly defined, but it is preferable to keep the drying time in the above range in order to shorten the film production time in consideration of the time required for the solvent to flow sufficiently.

The coating step (step b) and the drying step (step c) can be repeatedly performed one to six times in sequence, and more preferably five times. The polymer thin film can be produced in multiple layers by repeating the coating and drying steps.

If the coating layer is too thin, the film may easily peel off in the course of taking the fingerprint. If the coating layer is made too thick, the film may become thick and the surface may be curved and the fingerprint may not be flattened. Therefore, it is desirable to maintain the above range.

The present invention also provides a sensor for biometric information recognition comprising a water-soluble polymer compound that reacts with sweat gland secretion to exhibit color and / or structural change.

The sweat gland secretion may be moisture, amino acid or salt.

The above-mentioned water-soluble polymer compound can be used as the above-mentioned water-soluble polymer compound, preferably a polymer having -OH, -CONH ₂ , COC or COO, which is a nonionic functional group having high hydrophilicity. At least one member selected from the group consisting of polyvinylpyrrolidone, polyacrylic acid, polyvinyl alcohol, polyamide, polyethylene oxide, starch, agarose gel and the like having a functional group capable of being present in a ratio of 2: , But polyvinylpyrrolidone or polyacrylic acid may be most preferred.

The sensor for biometric information recognition according to the present invention is preferably used as a pore mapping sensor and can be used as a reversible sensor capable of repeated use. In this case, it can be usefully used for a security device such as a door security device.

According to the present invention, it is possible to easily detect the positions and patterns of pores through color or structure changes appearing in response to secretion of glands (moisture, amino acid, salt, etc.). In addition, the present invention recognizes the positions and patterns of pores through changes in color or structure, and amplifies and displays the positions and patterns of the pores to display the map of pores.

In addition, according to the present invention, the distribution of pores distributed in the fingerprint ridge can be segmented and recognized, and the fingerprint recognition rate can be drastically increased by comparing and analyzing the characteristic points of the pore through only a small fraction of the fingerprint collection.

In addition, the present invention detects moisture, amino acid, ion component, and the like secreted from sweat glands on the surface of the skin (fingers, etc.), thereby detecting changes in sweat secretion amount or secretion composition that are generated when an anomaly occurs in a human body, It can be used for health status analysis.

In addition, the present invention provides a method which can be repeatedly used by turning a used polymer film into a normal state by heating, solvent exposure, rubbing, press, or the like

In addition, since the present invention can be provided in the form of a thin film, it is convenient to carry and can be easily used in various places.

FIG. 1 shows an optical microscope image of a polyvinylpyrrolidone polymer thin film produced according to Example 2-1, after a fingerprint is taken on the thin film. FIG. (a) is a general light source image and (b) is a reflected light source image.
Fig. 2 shows an optical microscope image of a polyacrylic acid polymer thin film produced according to Example 2-2 on which a fingerprint is imaged. (a) is a general light source image and (b) is a reflected light source image.
Fig. 3 shows an electron microscope image of a polyvinylpyrrolidone polymer thin film produced according to Example 2-1 on which a fingerprint is imaged.
4 shows an electron microscope image of a polyacrylic acid polymer thin film produced according to Example 2-2 after a fingerprint is printed on the film.
FIG. 5 is a graph showing an optical microscope image (a, c) obtained by photographing a fingerprint on a polyvinylpyrrolidone polymer thin film produced according to Example 2-1 and an optical microscope image (B, d) are analyzed using an image matching program. (a) and (b) are general light source images, and (c) and (d) are reflected light source images.
FIG. 6 is a photograph showing the optical microscope image (a, c) after the fingerprint is printed on the polyacrylic acid thin film produced according to Example 2-2 and the optical microscope image (a, c) obtained by analyzing the potential fingerprint b, and d) using an image matching program. (a) and (b) are general light source images, and (c) and (d) are reflected light source images.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention. It is natural that such variations and modifications are included in the claims.

< Example >

Example  1: Preparation of Solution Composition for Pore Bore Detection Sensor

Polyvinylpyrrolidone polymer is dissolved by selecting a solvent that is easy to spin coat and can dissolve the polymer to be used. Depending on the polymer material to be used, the solvent may be different and the wt% of the polymer suitable for film formation may be different depending on the solvent used. (Average about 15 wt%)

In general, when MeOH or CHCl ₃ is used, the volatilization of the solvent is faster, so it is more effective when making multiple films, but there is a fear that bubbles may be formed during the production process. When DMSO or DMF is used, the solvent does not volatilize well and the bubble generation rate is very low.

1.66 g of polypyrrolidone polymer or 0.71 g of polyacrylic acid polymer is uniformly dissolved in 10 ml of solvent using a Voltex method or a Sonication method to prepare a solution composition.

In Example 1-1, 1.66 g (15 wt%) of polyvinylpyrrolidone polymer was uniformly dissolved in 10 ml of DMF solvent using a Voltex mixer to prepare a polymer solution composition.

In Example 1-2, 0.71 g (7 wt%) of a polyacrylic acid polymer was uniformly dissolved in 10 ml of a solvent DMF solvent using a Voltex mixer to prepare a polymer solution composition.

Example  2: Manufacture of polymer film by spin coating

Cut slides with a size suitable for fingerprinting (2.5 cm x 2.5 cm) and clean them with methanol, chloroform, acetone. Apply an appropriate amount (0.25 ml) of the polymer solution containing the above-prepared polymer on the prepared glass plate and spin-coat. It is dried in a 70 degree oven for 5 minutes to 30 minutes in order to blow the solvent sufficiently to form a film film. Especially when solvents with low volatility such as DMSO and DMF are used, they are dried for 20 minutes or more. In order to produce a multi-layered film, a process of spin-coating the polymer solution on the dried film again and drying it again is repeated five times in total to prepare a film. Using the solution compositions of Examples 1-1 and 1-2, a polyvinylpyrrolidone polymer film (Example 2-1), a polyacrylic acid polymer film (Example 2-2), and a polyvinylpyrrolidone polymer film were prepared according to the above- .

Experimental Example  1: Analysis of fingerprint image using optical microscope 1

Fingerprints were taken on a polymer film according to Example 2-1 (polyvinylpyrrolidone polymer film) and 2-2 (polyacrylic acid polymer film), and analyzed using an optical microscope. The results are shown in FIGS. 1 and 2 . 1 and 2, (a) is a general light source image and (b) is a reflected light source image. As shown in FIG. 1 and FIG. 2, the color change was observed at a position where the sweat gland secretion reacted with the sweat gland secretion.

Experimental Example  2: Analysis of fingerprint image using electron microscope

Fingerprints were taken on a polymer film according to Example 2-1 (polyvinylpyrrolidone polymer film) and 2-2 (polyacrylic acid polymer film), and analyzed using an electron microscope. The results are shown in FIGS. 3 and 4 . In FIGS. 3 and 4, two images were analyzed by varying the magnification of the electron microscope. As shown in FIG. 3 and FIG. 4, the structure change of the thin film at the position of reacting with the sweat gland secretion is shown, so that the position and pattern of the pores can be easily confirmed.

Experimental Example  3: Analysis of fingerprint images using optical microscope 2

Figs. 5 and 6 are photographs comparing the images obtained in Experimental Example 1 (Fig. 1 and Fig. 2) and the images obtained by the ninhydrin detection method using the potential fingerprints left on the paper at actual crime scenes. 5 (a) and 5 (c) are fingerprint images analyzed using polyvinylpyrrolidone polymer thin film, and FIGS. 5 (b) and 5 (d) are fingerprint images analyzed by ninhydrin detection method. Here, (a) and (b) are images analyzed by a general light source, and (c) and (d) are images analyzed by a reflected light source. 6 (a) and 6 (c) are fingerprint images analyzed using a polyacrylic acid thin film, and FIGS. 6 (b) and 6 (d) are fingerprint images analyzed by ninhydrin detection method. Here, (a) and (b) are images analyzed by a general light source, and (c) and (d) are images analyzed by a reflected light source. As a result of comparing the image according to the present invention and the image according to the ninhydrin detection method using the image matching program, it is found that 24 dots match in the general light source image in Fig. 5, 20 dots in the reflected light source image in Fig. 6 matches the 29 dots in the general light source image in Fig. 6, and 28 dots in the reflected light source image in Fig. 6, and the same pattern is confirmed when the same person takes the fingerprint have.

As described above, according to the present invention, when a fingerprint is photographed with a finger of a person who wants to obtain a map of the pores on the thin film and then observed with an optical microscope or an electron microscope, a pattern map of the pores of the person have. According to the present invention, it is possible to easily display a pore map using a conventional fingerprint recognition device without using expensive equipment or a high-quality fingerprint detection method. In addition, since the distribution obtained from the specific pore map has a characteristic unique to each person, it is possible to determine whether the pore is true or false using only a very small amount of pore distribution using the thin film according to the present invention.

Further, according to the present invention, the sensor film can be reused after the surface of the sensor film is returned to its original state by using methods such as heating, solvent exposure, rubbing, press, etc. after contacting the fingerprint sensor with the sensor film . And can be used for a door sensor or a security device for identifying the user's identity.

In addition, the composition of sweat coming from the sweat glands of the finger surface is mostly composed of 98% moisture, amino acid, ion component, etc. Therefore, according to the present invention, by detecting moisture, amino acid, ion component, The amount of secretion of sweat or the composition of the secretion which is generated when an abnormality occurs in the body can be used as a result and used for the analysis of the health state of the body.

Claims (20)

delete delete delete delete Thin film base material; And
And a coating layer formed on the thin film base material,
Wherein the coating layer is a multilayer of a water-soluble polymer compound layer and absorbs the secretion secreted from the sweat glands when the sweat glands are contacted with the skin, thereby showing a change in surface structure corresponding to the sweat glands. The method of claim 5,
Wherein the thin film base material is selected from the group consisting of a glass plate, a plastic substrate, a paper and a metal substrate. The method of claim 5,
Wherein the water-soluble polymer compound comprises at least one member selected from the group consisting of an acrylic polymer, a vinyl polymer, a cellulose derivative, an alkylene polymer, a glycol polymer, a urea polymer, a melamine polymer and an epoxy polymer Thin film for pore detection sensor. The method of claim 5,
Wherein the water-soluble polymer compound comprises at least one member selected from the group consisting of polyvinyl pyrrolidone, polyacrylic acid, polyvinyl alcohol, polyamide, polyethylene oxide, starch and agarose gel. Thin film. delete Dissolving the water-soluble polymer compound in water or an organic solvent to prepare a solution composition (step a); And
Coating the solution composition prepared in the above step on the base material and then drying it to sequentially absorb the secretions secreted from the sweat glands when coming into contact with the skin having the sweat glands to change the surface structure corresponding to the sweat glands, (Step b) of forming a multi-layered film on the pores of the pores. The method of claim 10,
Wherein the secretion secreted from the sweat glands is water, an amino acid, or a salt. The method of claim 10,
Wherein the water-soluble polymer compound comprises at least one member selected from the group consisting of an acrylic polymer, a vinyl polymer, a cellulose derivative, an alkylene polymer, a glycol polymer, a urea polymer, a melamine polymer and an epoxy polymer Method for manufacturing thin film for porthole detection sensor. The method of claim 10,
Wherein the water soluble polymer compound comprises at least one member selected from the group consisting of polyvinyl pyrrolidone, polyacrylic acid, polyvinyl alcohol, polyamide, polyethylene oxide, starch and agarose gel,
Wherein the organic solvent is DMSO or DMF. The method of claim 10,
Wherein the base material is selected from the group consisting of a glass plate, a plastic substrate, a paper and a metal substrate. A sensor for biometric information recognition comprising a water-soluble polymer compound layer formed into multiple layers absorbing moisture, amino acid or salt secreted from a living body and showing a change in surface structure. 16. The method of claim 15,
Wherein the water-soluble polymer compound comprises at least one member selected from the group consisting of an acrylic polymer, a vinyl polymer, a cellulose derivative, an alkylene polymer, a glycol polymer, a urea polymer, a melamine polymer and an epoxy polymer Sensor for biometric information recognition. 16. The method of claim 15,
Wherein the water-soluble polymer compound comprises at least one member selected from the group consisting of polyvinylpyrrolidone, polyacrylic acid, polyvinyl alcohol, polyamide, polyethylene oxide, starch and agarose gel. sensor. 16. The method of claim 15,
Wherein the biometric information recognition sensor comprises:
And a sensor for mapping the pelvis. delete 16. The method of claim 15,
Wherein the sensor is for a security device.

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