KR101635171B1 - Electronic textile and producing method thereof - Google Patents

Abstract

The present invention relates to an electronic fiber and a manufacturing method thereof.
According to the present invention, as described above, the present invention provides an electronic fiber including an adhesive layer including a bioadhesive material and having a graphene layer or a metal nanoparticle layer formed on an outer circumferential surface of the adhesive layer, and a method of manufacturing the same, It can be made into electronic fiber with excellent conductivity, flexibility and chemical resistance by economical and easy process by using existing fiber, and it can contribute to the development of intelligent clothing suitable for ubiquitous environment by strengthening competitiveness in future textile industry market. .

Description

[0001] ELECTRONIC TEXTILE AND PRODUCING METHOD THEREOF [0002]

The present invention relates to an electronic fiber and a method for manufacturing the same, and more particularly, to an electronic fiber including an adhesive layer containing a bioadhesive material and having a graphene layer or a metal nanoparticle layer formed on an outer circumferential surface of the adhesive layer, and a method of manufacturing the same.

Electronic fibers have attracted much attention because they can be applied to various fields ranging from portable flexible display function, bio signal diagnosis function, hazardous gas sensing function, energy storage function to the implementation of a wearable computer. Graphene fibers have been actively developed around the world because of their durability, warpage, ability to be worn and washed, and light weight of materials to achieve such functions. However, the electronic fibers announced so far have limitations that are difficult to apply to conventional fibers.

In the present invention, graphene oxide is wrapped in fibers, cotton, nylon, polyester, etc., which are currently used by using a bioadhesive material, and then the graphene oxide is reduced by a chemical method.

As a result, it is possible to easily make electronic fibers such as existing fibers or nanofibers such as new fibers, and it is possible to apply them directly to the current clothing industry. The electronic fiber manufacturing technology of the present invention is expected to contribute to strengthening competitiveness in the future electronic and textile industry related market and leading standardization in the development of intelligent clothes suitable for ubiquitous environment.

On the other hand, Korean Prior Registration No. 10-1233818 (a method of producing graphene-treated fiber) is known as a related art.

The present inventors have found that conventional methods for producing electronic fibers are difficult to apply to existing fibers, and that they are difficult to apply to existing fibers in the formation of graphene or metal nanoparticle layers to impart electrical conductivity, The adhesive layer of the biofouling material (such as bovine serum albumin) is formed as a result of efforts to improve the problem that the electrical conductivity of the finally formed electronic fiber is remarkably low because of low adhesiveness to the fibers, It is possible to produce electronic fibers having excellent conductivity, flexibility and chemical resistance by easily applying them to conventional fibers when forming a graphene layer or a metal nanoparticle layer, It is experimentally confirmed that a high electric conductivity of 10,000 times or more is secured Thereby completing the present invention.

It is an object of the present invention to provide an electronic fiber including an adhesive layer made of a bioadhesive material and including a graphene layer or a metal nanoparticle layer formed on the outer peripheral surface of the adhesive layer.

Another object of the present invention is to provide a method of manufacturing an electronic fiber including an adhesive layer made of a bioadhesive material and including a granuline layer on the outer surface of the adhesive layer or a metal nanoparticle layer.

In order to attain the above object, the present invention provides an adhesive sheet comprising: a fiber; and an adhesive layer made of a bio-adhesive material formed on an outer circumferential surface of the fiber; And a graphene layer or a metal nanoparticle layer formed on an outer peripheral surface of the adhesive layer.

The fiber is characterized in that it is one selected from the group consisting of cotton, hemp, silk, wool, nylon, polyester, polyurethane, polystyrene, polypropylene and Teflon.

The bioadhesive material is at least one selected from the group consisting of bovine serum albumin (BSA), polylysine, polydopamine, casein, and chitosan .

The graphene layer is formed by treating graphene oxide with a fiber having an adhesive layer formed thereon and reducing the graphene oxide.

Wherein the graphene is selected from the group consisting of graphene quantum dots, carbon nanotubes, and fullerene.

The metal nanoparticle layer may include one or more nanoparticles selected from the group consisting of gold, silver, copper, nickel, palladium, and platinum, nanowires, or nanotubes.

In addition, the present invention provides a method for producing an electronic fiber comprising the step of forming an adhesive layer made of a bio-adhesive material on a fiber.

The fiber is characterized in that it is one selected from the group consisting of cotton, hemp, silk, wool, nylon, polyester, polyurethane, polystyrene, polypropylene and Teflon.

The bioadhesive material is at least one selected from the group consisting of bovine serum albumin (BSA), polylysine, polydopamine, casein, and chitosan .

According to the present invention, there is provided an electronic fiber comprising an adhesive layer containing a bioadhesive material and having a graphene layer or a metal nanoparticle layer formed on the outer circumferential surface of the adhesive layer, and a method for producing the same, It can be made into electronic fiber having excellent conductivity, flexibility and chemical resistance by a simple process, and it can contribute to the development of intelligent clothes suitable for ubiquitous environment, and to enhance competitiveness in future textile industry market.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram showing an example of a process for producing an electronic fiber according to the present invention. FIG.
2 is a perspective view of an electronic fiber produced according to Example 1 of the present invention.
FIG. 3A is an electron micrograph of an electronic fiber produced according to Example 1 of the present invention. FIG.
FIG. 3B is an electron micrograph of a single strand of an electronic fiber produced according to Example 1 of the present invention. FIG.
3C is an electron micrograph of graphene-specific wrinkles and ripples formed on the surface of an electronic fiber produced according to Example 1 of the present invention.
4A is Raman data of an electronic fiber produced according to Example 1 of the present invention.
4B is X-ray photoelectron spectroscopy (XPS) data of an electronic fiber produced according to Example 1 of the present invention.
Fig. 4c is electrical conductivity data of an electronic fiber prepared according to Example 1 of the present invention. Fig.
5 is a photograph of an LED device lighting according to Example 1 of the present invention.
Fig. 6 is a graph showing changes in electric conductivity of 400 times physical bending of an electronic fiber produced according to Example 1 of the present invention. Fig.
Fig. 7 is a graph showing change in electric conductivity of nine times of washing of an electronic fiber prepared according to Example 1 of the present invention. Fig.
8 is a gas measurement data of the woven electronic filament made according to Example 1 of the present invention.

Hereinafter, the present invention will be described in detail.

The present invention relates to an adhesive layer comprising a fiber and a bioadhesive formed on an outer peripheral surface of the fiber; And a graphene layer or a metal nanoparticle layer formed on an outer circumferential surface of the adhesive layer, and a method of manufacturing the electronic fiber.

The fibers may be selected from the group consisting of cotton, hemp, silk, wool, nylon, polyester, polyurethane, polypropylene, and Teflon, and cotton fibers may be preferably used. The biocompatible material may be selected from bovine serum albumin (BSA) polylisine, polydopamine, casein, chitosan, and may be prepared by mixing two or more bioadhesive materials It can also be used. Preferably, bovine serum albumin can be used. The graphene may be selected from the group consisting of graphene quantum dots, carbon nanotubes, and fullerenes, and the metal nanoparticle layer may include at least one nanoparticle selected from the group consisting of gold, silver, copper, nickel, palladium, Or nanotubes. ≪ / RTI > On the other hand, in the case of an electronic fiber including a graphene layer, the method includes the steps of forming an adhesive layer made of a bioadhesive material on the fiber, and treating the fiber having the adhesive layer formed with graphene oxide; And reducing the graphene oxide. In addition, the process for producing an electronic fiber including a metal nanoparticle layer may include a step of including an adhesive layer made of a bio-adhesive material on the fiber, and a step of forming a metal nanoparticle layer on the fiber having the adhesive layer formed thereon.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these examples are for illustrative purposes only and that the scope of the present invention is not construed as being limited by these examples.

Example 1. Preparation of electronic fiber using bovine serume albumine

I) A 1 wt% bovine serum albumin solution was prepared.

Ii) A cotton yarn or a polyester yarn was dipped in the prepared 1 wt% bovine serum albumin solution for 30 minutes, dried in a hood for 2 hours, and then removed to remove residual bovine serum albumin on the cotton yarn. Rinsed in distilled water and rinsed again for 2 hours.

Iii) The graphene oxide was manufactured by modified Hummers and Offenmans method of graphite powder (SP-1 graphite) purchased from Bay carbon. The graphene oxide powder was added to distilled water at a weight ratio of 1 wt%, and then the solution was dispersed by ultrasonic method for 2 hours to prepare a graphene oxide-containing solution.

Iv) The hydrogen ion concentration (pH) of the prepared graphene oxide solution was adjusted to about 3 to 4, and the cotton yarn coated with bovine serum albumin was immersed for 2 hours or more. The amide group formed on the surface of the fiber and the hydroxyl and carboxyl groups of the graphene oxide were electrostatically reacted to complete the graphene oxide coated fiber. The prepared graphene oxide fibers were taken out and dried in the hood for 2 hours or more.

V) Electronic fibers having conductivity were produced by reducing the fibers coated with graphene oxide. The graphene oxide composite fiber was converted into an electronic fiber by using HI-AcOH (hydroidic acid with acetic acid) solution. More specifically, graphene oxide fibers were placed in a sealed glass reactor containing a mixture of 2 ml of hydroiodic acid and 5 ml of acetic acid, and reacted at 40 ° C for 30 minutes by steam reduction or immersion.

Example 2. Preparation of electronic fiber using polylysine

I) 0.1 wt% polylysine solution was prepared.

Ii) The cotton yarn was dipped in the polylysine solution for 30 minutes and dried in a hood for 2 hours. Thereafter, in order to remove the residual polylysine not coated on the cotton yarn, it was immersed in distilled water, rinsed, and then dried again for 2 hours.

Iii) The graphene oxide was prepared by a modified Hummers and Offenmans method of graphite powder (SP-1 graphite) purchased from Bay carbon, and the graphene oxide powder Was added to distilled water at a weight ratio of 1 wt%, and then the solution was dispersed by an ultrasonic method for 2 hours to prepare a graphene oxide-containing solution. The polylactic coated cotton yarn was immersed in the prepared graphene oxide solution for 2 hours or more. The amide group formed on the surface of the fiber and the hydroxyl and carboxyl groups of the graphene oxide self-assemble to complete the graphene oxide coated fiber. The prepared graphene oxide fibers were taken out and dried in the hood for 2 hours or more.

Iv) The graphene oxide-coated fiber was reduced to prepare an electronic fiber having conductivity. The graphene oxide composite fiber was converted into an electronic fiber by using HI-AcOH (hydroidic acid with acetic acid) solution. More specifically, graphene oxide fiber was placed in a glass-filled glass reactor containing a mixture of 2 ml of hydroiodic acid and 5 ml of acetic acid, and the mixture was reacted at 40 ° C for 30 minutes by steam reduction or immersion.

Example 3. Preparation of electronic fiber using polydopamine

I) Dopamine chloride powder was added to distilled water to prepare a 2 mg / ml polypdopamine solution, which was adjusted to pH 8 with 10 mM Trizma hydrochloric acid.

Ii) Cotton yarn was soaked in the prepared polydopamine solution for 30 minutes and dried in a hood for 2 hours. Thereafter, in order to remove the residual polylysine not coated on the cotton yarn, it was immersed in distilled water, rinsed, and then dried again for 2 hours.

Iii) The graphene oxide was prepared by a modified Hummers and Offenmans method of graphite powder (SP-1 graphite) purchased from Bay carbon, and the graphene oxide powder Was added to distilled water at a weight ratio of 1 wt%, and then the solution was dispersed by an ultrasonic method for 2 hours to prepare a graphene oxide-containing solution. A cotton yarn coated with polypodamine was immersed in the prepared graphene oxide solution for 2 hours or more. The amide group formed on the surface of the fiber and the hydroxyl and carboxyl groups of the graphene oxide self-assemble to complete the graphene oxide coated fiber. The prepared graphene oxide fibers were taken out and dried in the hood for 2 hours or more.

Iv) The grafted fiber-coated fiber was reduced to produce an electronic fiber having conductivity. The graphene oxide composite fiber was converted into an electronic fiber by using HI-AcOH (hydroidic acid with acetic acid) solution. More specifically, graphene oxide fiber was placed in a glass-filled glass reactor containing a mixture of 2 ml of hydroiodic acid and 5 ml of acetic acid, and the mixture was reacted at 40 ° C for 30 minutes by steam reduction or immersion.

Example 4. Preparation of electronic fibers containing gold nanoparticles

I) 1 wt% bovine serum albumin solution is prepared.

Ii) A cotton or polyester yarn was immersed in the prepared 1 wt% bovine serum albumin solution for 30 minutes and dried in a hood for 2 hours. Thereafter, in order to remove the residual bovine serum albumin not coated on the cotton yarn, it was immersed in distilled water, rinsed and dried again for 2 hours.

Iii) Bovine serum albumin prepared in a solution of 20 mg gold nanoparticles at 1 mg / ml was dipped in cotton yarn or polyester yarn for 30 minutes, and then shaken at a rate of 60 revolutions per minute using a shaker.

Iv) The gold nanoparticle coated yarn was taken out and dried in a hood for 2 hours.

Experimental Example 1. Electron microscopy (Field emission scanning electron microscopy)

3C. I) The surface of the electronic fiber was measured with a high-resolution electron microscope (FEI Sirion 200) using the graphene electronic fiber prepared in Example 1. [ Ii) As a result, a number of waves and wrinkles on the surface can be identified, indicating that the surface of the fiber is well coated with graphene.

Experimental Example 2 Raman spectroscopy measurement

4A. I) The graphene electronic fibers prepared according to Example 1 were placed on a slide glass, and then, using a Raman spectroscope (LabRAM HR, Horiba Scientific) having a wavelength of 514 nm, 3500 cm < -1 >. Ii) In the case of graphene fibers, 1340 ㎝ ^-1 D-peak and 1580 ㎝ ^-1 G-peak are generated and confirmed by Raman data.

Experimental Example 3. X-ray photoelectron spectroscopy measurement

With respect to the XPS data results in Figure 4b., I) the graphene electronic fibers prepared according to Example 1 above were placed on a slide glass and then 280-294 eV binding using an optoelectronic analyzer (ESCALAB 200R, Thermo VG Scientific) energy analysis. Ii) This analysis confirmed the tendency of oxygen-containing functional groups to decrease, which means that graphene oxide fibers are reduced to conductive graphene electronic fibers.

Experimental Example 4. Measurement of Electrical Conductivity of Electronic Fibers

With respect to the results of the electrical conductivity measurement of FIG. 4C, i) electrodes were prepared for graphene measurement on the graphene oxide fibers and graphene fibers prepared according to Example 1 above. Ii) In the case of graphene fiber, it was confirmed that the electric conductivity was increased by 100,000 times or more as compared with the graphene oxide fiber before reduction.

Experimental Example 5. Measurement of change in electrical conductivity according to repetitive bending of an electronic fiber.

With respect to the result of the change in electric conductivity according to the repetitive bending of FIG. 6, i) the electronic fiber prepared in Example 1 was bent and connected to a fiber evaluation device capable of measuring electric conductivity. Ii) Measurement of change in electrical conductivity according to bending of 400 times was performed. The results show that graphene fibers do not deteriorate electrical conductivity even with physical forces such as repetitive bending.

Experimental Example 6 Measurement of Electrical Conductivity Change by Washing of Electronic Fibers

Regarding the result of the change of the electrical conductivity according to the multiple washing using the general detergent of Fig. 7, i) the electronic fiber prepared in Example 1 was put in a general detergent solution and washed for 30 minutes each time. Ii) A total of 9 washes were performed and a measurement of electrical conductivity was performed. This result shows that the graphene electronic fiber does not deteriorate the electrical conductivity even in a large number of washes.

Experimental Example 7. Gas Measurement of Electronic Fiber

With respect to the gas measurement results of FIG. 8, i) two electrodes for gas measurement were formed on the graphene fibers prepared according to Example 1 above. Ii) The measurement gas was nitrogen dioxide gas, and the gas concentration was 0.25 ppm to 1.25 ppm at room temperature. The results show that graphene fibers can detect high-risk gases in real life.

Having described specific portions of the present invention in detail, those skilled in the art will appreciate that these specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereby. something to do. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (9)

fiber;
An adhesive layer made of a bio-adhesive material formed on an outer peripheral surface of the fiber; And a graphene layer or a metal nanoparticle layer formed on an outer circumferential surface of the adhesive layer,
The fiber is one selected from the group consisting of cotton, hemp, silk, wool, polyester, polystyrene, polypropylene, and Teflon,
The bioadhesive material may be at least one selected from the group consisting of bovine serum albumin (BSA) and polylysine,
The concentration of the bovine serum albumin is 1 wt% of bovine serum albumin,
Wherein the concentration of the polylysine is 0.1 wt% of polylysine.
delete delete The method according to claim 1,
Wherein the graphene layer is formed by treating graphene oxide with a fiber having an adhesive layer formed thereon and reducing the graphene oxide.
The method according to claim 1,
Wherein the graphene is selected from the group consisting of graphene quantum dots, carbon nanotubes, and fullerene.
The method according to claim 1,
Wherein the metal nanoparticle layer comprises at least one nanoparticle selected from the group consisting of gold, silver, copper, nickel, palladium, and platinum, a nanowire, or a nanotube.
And forming an adhesive layer made of a bioadhesive material on the fibers,
The fiber is one selected from the group consisting of cotton, hemp, silk, wool, polyester, polystyrene, polypropylene, and Teflon,
The bioadhesive material may be at least one selected from the group consisting of bovine serum albumin (BSA) and polylysine,
The concentration of the bovine serum albumin is 1 wt% of bovine serum albumin,
The concentration of the polylysine is 0.1 wt% of polylysine,
Wherein the step of forming the adhesive layer further comprises a step of coating the fibers with a bioadhesive material and then washing the fibers with distilled water. delete delete

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