KR20160131484A - Electric conductive mono polyester filament having carbon nanotube - Google Patents
Electric conductive mono polyester filament having carbon nanotube Download PDFInfo
- Publication number
- KR20160131484A KR20160131484A KR1020150063953A KR20150063953A KR20160131484A KR 20160131484 A KR20160131484 A KR 20160131484A KR 1020150063953 A KR1020150063953 A KR 1020150063953A KR 20150063953 A KR20150063953 A KR 20150063953A KR 20160131484 A KR20160131484 A KR 20160131484A
- Authority
- KR
- South Korea
- Prior art keywords
- carbon nanotubes
- conductive
- diameter
- length
- filament
- Prior art date
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
Description
TECHNICAL FIELD The present invention relates to a conductive monopolyester filament containing carbon nanotubes, and more particularly, to a conductive monopolyester filament comprising carbon nanotubes containing carbon nanotubes that are sufficiently connected with carbon nanotubes contained in polyester fibers to improve conductivity and physical properties such as strength, Lt; / RTI > filaments.
However, in recent years, due to the development of telecommunication technology, a smart device has been used for various fields such as a conventional function of preventing electrification and antistatic, Challenges that have the same effect are being developed.
The first challenge is to use insulation coated copper or stainless steel fibers (Swiss TEXWIRE) or stainless steel fibers (R.STAT, France), which are applied to all ICT textile products exhibited with excellent electrical conductivity. It is not suitable for clothing and it is used only in some industries.
In order to solve the problem of the conductive yarn described above, R.STAT has developed a staple fiber, a monofilament, and a multifilament fiber in which nylon fiber is coated with silver or copper, There is a limit to the application to various fields as a problem of durability in which the production efficiency is very low and the coating is easily fallen.
In recent years, as a conductive yarn to be developed, a conductive yarn produced by spinning a polyester resin, a polyamide resin, a polypropylene resin or the like containing a conductive material such as carbon black or carbon nanotubes has been developed.
Korean Patent Publication No. 2011-0078416 discloses a cross-shaped conductive composite fiber and a method of manufacturing the composite fiber. The composite fiber has a cross-shaped core portion including nano silver and fluidized-bed multi-walled carbon nanotubes. The core- There is an effect of maximizing the electrical conductivity even when using a smaller amount of filler.
Korean Patent Publication No. 2011-0078426 discloses a polyamide / fluidized CNT composite yarn in which a fluidized bed carbon nanotube and an existing composite yarn cross section are modified to improve electric conduction, Layered CNT having a low electric conductivity and an excellent electrical conductivity, and thus a method for manufacturing the polyamide electric conductor having excellent electric conductivity.
Korean Laid-Open Patent Application No. 2012-0077262 discloses a process for producing a master batch chip by mixing polyester and carbon nanotubes and melt spinning the master batch chip and the polyester chips through spinneret at 240 to 300 ° C The present invention relates to a method for producing a polyester cross-section yarn and a polyester cross-section yarn obtained by the method. The polyester cross-sectional cross-section yarn retains the characteristics inherent in polyester fibers while having antistatic properties by applying carbon nanotubes to the polyester polymerizate The purpose is to do.
As described above, although the development of conductive yarns using carbon nanotubes is increasing, the conductive yarns containing conventional carbon nanotubes are mostly made of multifilaments and are not suitable for various applications due to their low physical properties. There is a problem that it is difficult to apply.
Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a carbon nanotube having excellent conductivity by improving the connectivity of carbon nanotubes in a mono-polyester filament by controlling the length of carbon nanotubes And a conductive monopolyester filament comprising the conductive monopolyester filament.
Another object of the present invention is to provide a conductive mono-polyester filament containing carbon nanotubes having excellent conductivity and improved physical properties such as strength and elongation by controlling the content of carbon nanotubes.
The present invention relates to a conductive mono-polyester filament containing carbon nanotubes, wherein the polyester resin contains 3 to 8 wt% of carbon nanotubes having a diameter of 1 to 10 nm and a length of 700 to 1200 nm, Wherein the monofilament has a diameter of 0.1 to 0.5 mm. The carbon nanotube-containing conductive monopolyester filament according to claim 1, wherein the monofilament has a diameter of 0.1 to 0.5 mm.
Also, the present invention provides a conductive monopolyester filament comprising carbon nanotubes, wherein the carbon nanotubes have an average length / diameter ratio of 100 or more.
The present invention also provides a conductive monopolyester filament comprising carbon nanotubes, wherein the carbon nanotubes are multi-wall carbon nanotubes.
The conductive monopolyester filaments containing carbon nanotubes according to the present invention have an effect of improving the conductivity of carbon nanotubes in polyester filaments by using carbon nanotubes having a length longer than that of general carbon nanotubes.
In addition, the conductive monopolyester filament containing carbon nanotubes according to the present invention can be formed into monofilaments, and can be fabricated into various types of fabrics such as mesh-type fabrics, and can provide antistatic, antistatic, and electromagnetic shielding effects There is an effect that can be done.
Further, the amount of the carbon nanotubes contained in the polyester resin is controlled to improve the physical properties such as strength and elongation.
Hereinafter, a preferred embodiment of the present invention will be described in detail. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.
As used herein, the terms " about, " " substantially, " " etc. ", when used to refer to a manufacturing or material tolerance inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.
The present invention relates to a conductive monopolyester filament containing carbon nanotubes formed into a monofilament by a spinning process of forming a spinning composition by containing a carbon nanotube in a polyester resin and then forming the spinning composition into a monofilament.
Due to the excellent electrical properties of the carbon nanotubes, it is an innovative conductive material that far exceeds the level of ordinary static electricity suppressing materials. It is a type of carbon isotope composed of carbon. One carbon is bonded to another carbon atom in hexagonal honeycomb shape The graphite sheet is formed into a tubular shape wound in a cylindrical shape and has a diameter of 1 to 100 nm.
The carbon nanotubes can be classified into single walled carbon nanotubes (SWNTs), double walled carbon nanotubes (DWNTs), multiwalled carbon nanotubes (DWNTs), and the like depending on the number of walls made of graphite surfaces. (MWNT: Multiple Walled Carbon Nanotube). Among them, SWNT, which is rarely produced in the world, is reported to have superior characteristics than MWNT. The electrical characteristics are as follows: resistance value is 1/100 of copper, Which is 1,000 times as high as that of the conventional art.
As the carbon nanotubes used in the present invention, it is preferable to use multi-wall carbon nanotubes having excellent economical efficiency.
The thermal conductivity of the carbon nanotubes is twice as high as that of the diamond which is the most excellent in nature, and the chemical properties of the carbon nanotubes are excellent in chemical stability, such as resistance against acid, base and reducing agent. In addition, the mechanical properties are structurally strong bonds between carbon and carbon, and have a strength of 50 to 100 times of the strength of the high-strength alloy. The hexagonal honeycomb structure forms micropores. It has wide structural characteristics.
It is preferable that the polyester resin contains 3 to 8% by weight of carbon nanotubes. If the content of the carbon nanotubes is less than 3% by weight, the conductivity of the carbon nanotubes is difficult to exhibit and the conductivity may be deteriorated. If the content of the carbon nanotubes exceeds 8% by weight, May be lowered, and threading may occur in the spinning process, and radioactivity may be lowered.
As described above, the carbon nanotubes used in the present invention preferably have a diameter of 1 to 10 nm, and preferably have a length of 700 to 1200 nm.
The length of the carbon nanotubes of the present invention is a very important factor for maintaining the conductivity of the conductive polyester fiber of the present invention.
When the length of the carbon nanotubes is 700 nm, the conductivity of the carbon nanotubes may deteriorate due to the poor connectivity of the carbon nanotubes. When the length of the carbon nanotubes is 1,200 nm, The tactile properties of the fibers may be deteriorated. Therefore, the carbon nanotubes of the present invention preferably have a length of 700 to 1200 nm.
In addition, the spinning composition in which the polyester resin and the carbon nanotube are mixed is continuously subjected to a tensile force in the longitudinal direction of the fiber during the spinning process, and the spinning composition is fiberized by such a tensile force, and the carbon nanotubes are arranged in the longitudinal direction . As described above, the carbon nanotubes are arranged in the longitudinal direction of the fibers, and the carbon nanotubes are connected to each other to improve conductivity.
As the length / diameter ratio of the carbon nanotubes increases, the arrangement of the carbon nanotubes improves.
The length / diameter ratio of the carbon nanotubes is less than 100, and the conductivity of the carbon nanotubes is lowered due to the low arrangement of the carbon nanotubes, Or more.
When the diameter of the conductive monopolyester filament of the present invention is less than 0.1 mm, the filing speed may be high in the spinning process and the manufacturing process may be deteriorated. If the diameter exceeds 0.5 mm, the properties may be deteriorated. The diameter of the conductive monopolyester filament of 0.1 to 0.5 mm is preferable.
The method for producing a conductive mono-polyester filament containing carbon nanotubes according to the present invention can be produced by a general monofilament manufacturing method and can be produced as a monofilament through a single-hole spinneret. However, It is preferable to manufacture the monofilament by a spinning process using a spinneret having a number of holes of 100 to 200 and spinning it into a multifilament.
Hereinafter, examples of the method for producing the conductive monopolyester filament containing the carbon nanotubes according to the present invention are shown, but the present invention is not limited to the examples.
Example 1
A spinning composition containing 4 wt% of multi-walled carbon nanotubes in a polyester resin was prepared and then subjected to a spinning process in the same manner as the spinning process of a general monofilament. The spinning composition was stretched at a draw ratio of 4.5, To prepare a conductive monopolyester filament containing carbon nanotubes.
The multi-walled carbon nanotubes were about 7 to 8 nm in diameter, about 900 to 1000 nm in length, and about 120 in length / diameter ratio.
Example 2
The carbon nanotubes used had a diameter of about 2 to 3 nm, a length of about 700 to 800 nm, and a length / diameter ratio of about 300 Carbon nanotubes were used.
Comparative Example One
Was prepared in the same manner as in Example 1, but monopoly polyester filaments were prepared using only polyester resin without carbon nanotubes.
Comparative Example 2
The carbon nanotubes having a diameter of about 7 to 8 nm, a length of about 300 to 400 nm, and a length / diameter ratio of about 50 Carbon nanotubes were used.
The radioactive, conductive, tensile strength and elongation of Examples 1 and 2 and Comparative Examples 1 and 2 thus prepared were evaluated.
* Radioactivity evaluation: Evaluation was made by the number of yarn breaks per irradiation hour. Excellent for less than one yarn break during 24 hours, good within 3 times, normal within 5 times, and bad for 6 times or more.
* Conductivity evaluation: The resistance value was evaluated by evaluating with KS K 0180 (electrical resistance test method of a yarn).
* Tensile strength and elongation: evaluated according to ASTM 790.
As shown in Table 1, Examples 1 and 2, which are conductive monopolyester filaments containing carbon nanotubes according to the present invention, are superior in radioactivity to those of Comparative Examples 1 and 2. The diameters of the monofilaments are too small or large, Able to know.
Further, it can be seen that in Examples and Comparative Examples, the carbon nanotubes of Example 2 having a longer length and a larger length / diameter ratio were more excellent in conductivity than those of Example 1, and the ratio of length / It can be seen that the conductivity of Comparative Example 2 is the lowest, and it can be seen that the ratio of the length and the length / diameter of the carbon nanotubes greatly affects the conductivity.
It can be seen that Examples 1 and 2 are superior in strength to Comparative Examples 1 and 2, and superior in elongation than Comparative Example 2.
Claims (3)
The polyester resin contains 3 to 8% by weight of carbon nanotubes having a diameter of 1 to 10 nm and a length of 700 to 1,200 nm and is formed into a monofilament through a spinning process.
Wherein the monofilament has a diameter of 0.1 to 0.5 mm. The conductive monopolyester filament according to claim 1, wherein the monofilament has a diameter of 0.1 to 0.5 mm.
Wherein said carbon nanotubes have an average length / diameter ratio of 100 or more.
Wherein the carbon nanotubes are multi-wall carbon nanotubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150063953A KR20160131484A (en) | 2015-05-07 | 2015-05-07 | Electric conductive mono polyester filament having carbon nanotube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150063953A KR20160131484A (en) | 2015-05-07 | 2015-05-07 | Electric conductive mono polyester filament having carbon nanotube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160131484A true KR20160131484A (en) | 2016-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150063953A KR20160131484A (en) | 2015-05-07 | 2015-05-07 | Electric conductive mono polyester filament having carbon nanotube |
Country Status (1)
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| KR (1) | KR20160131484A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200046095A (en) * | 2017-10-13 | 2020-05-06 | 고쿠리츠켄큐카이하츠호진 상교기쥬츠 소고켄큐쇼 | Fiber consisting of carbon nanotubes and method for manufacturing the same |
-
2015
- 2015-05-07 KR KR1020150063953A patent/KR20160131484A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200046095A (en) * | 2017-10-13 | 2020-05-06 | 고쿠리츠켄큐카이하츠호진 상교기쥬츠 소고켄큐쇼 | Fiber consisting of carbon nanotubes and method for manufacturing the same |
| US11686019B2 (en) | 2017-10-13 | 2023-06-27 | National Institute Of Advanced Industrial Science And Technology | Fiber constituted from carbon nanotube and method for manufacturing same |
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