Filament Bundle Type Nano Fiber and Manufacturing Method Thereof

Inactive Publication Date: 2008-10-02
KOREA RES INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0014]As described above, a filament type nano-sized long fiber, which is produced using an improved electrospinning process according to the present invention, has mechanical properties that are better than a conventional nanofiber non-woven fabric, thereby being applied as a subst

Problems solved by technology

However, the nanofiber produced according to the conventional electrospinning process is limited to a non-woven fabric type.
Furthermore, they point out a problem that since the non-woven fabric type nanofiber consists of a single fiber, while the drops, which are formed at the tip of the spinneret during the electrospinning process, are spun toward the collector at a critical voltage (Vc), the single fibers collide wi

Method used

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  • Filament Bundle Type Nano Fiber and Manufacturing Method Thereof
  • Filament Bundle Type Nano Fiber and Manufacturing Method Thereof
  • Filament Bundle Type Nano Fiber and Manufacturing Method Thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

First Preparation of Spinning Solution

[0055]A polymer copolymer, which consists of 30 mol % of polyamide-based polymer with an average molecular weight and 70 mol % of polyimide-based polymer with an average molecular weight, was added to a N-methyl-2-pyrrolidine solvent, and sufficiently dissolved at room temperature for 20-30 min using a ultrasonic device. In this regard, a spinning solution contains 25 wt % of polyamide-polyimide copolymer with a number average molecular weight of 1000 based on the solvent.

preparation example 2

Second Preparation of Spinning Solution

[0056]Polyethylene terephthalate having an intrinsic viscosity of 0.64 was mixed with a polyester copolymer, which contains 30 mol % of isophthalic acid and 15 mol % of diethylene glycol and which has an intrinsic viscosity of 0.60, in a weight ratio of 75:25, and then dissolved in a mixed solvent (50:50) of trifluoroacetic acid and methylene glycol to produce a spinning solution containing 15 wt % of solids.

preparation example 3

Preparation of Spinning Melt

[0057]A mixed composition, which consists of 30 mol % of polyamide-based polymer with an average molecular weight and 70 mol % of polyimide-based polymer with an average molecular weight, was melted in an electric furnace at 350° C. to produce a spinning melt.

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Abstract

A filament type nano-sized long fiber and a method of producing the same are disclosed. In the method, a spinning solution or a spinning melt is electro-spun in drops using a spinneret to which a critical voltage is applied, and the spun drops are continuously collected on a multi-collector. The spinning solution is produced by dissolving a blend or copolymer consisting of two or more kinds of polymers in a solvent. The spinning melt is produced by melting the polymers. The multi-collector is selected from the group consisting of a plate type collector, a roll type collector, and a combination thereof. The filament type nano-sized long fiber is processed into a yarn through one step during the electrospinning process, and thus, mechanical properties are better than those of a conventional nanofiber non-woven fabric. Consequently, the filament type nano-sized long fiber can be utilized for the extended application.

Description

TECHNICAL FIELD[0001]The present invention relates to a filament type nano-sized long fiber and a method of producing the same. More particularly, the present invention pertains to a filament type nano-sized long fiber and a method of producing the same using an improved electrospinning process. In the method, a spinning solution or a spinning melt is electro-spun in drops using a spinneret to which a critical voltage is applied, and the spun drops are continuously collected on a multi-collector. In this regard, the spinning solution is produced by dissolving a blend or copolymer consisting of two or more kinds of polymers in a solvent. The spinning melt is produced by melting the polymers. Furthermore, the multi-collector is selected from the group consisting of a plate type collector, a roll type collector, and a combination thereof.BACKGROUND ART[0002]A nanofiber is an ultra-fine fiber having a diameter of 1-800 nm, and has various physical properties that cannot be gained from a...

Claims

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Application Information

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IPC IPC(8): D01D5/00
CPCD01D5/0076D01F6/80D01F6/90Y10T428/29Y10T428/2929Y10T428/2913Y10T428/298B82Y40/00D01D5/30
Inventor LEE, JAE-ROCKJEE, SEUNG-YONGKIM, HYO-JUNGHONG, YOUNG-TAIKKIM, SEOKPARK, SOO-JIN
Owner KOREA RES INST OF CHEM TECH
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