Activated carbon fiber and preparation method therefor

Patent metadata

Field	Value
Publication number	US-2016265144-A1
Application number	US-201415032660-A
Country	US
Kind code	A1
Filing date	Oct 29, 2014
Priority date	Oct 29, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

Disclosed is an activated carbon fiber, more specifically, a filament-type activated carbon fiber that is manufactured by activating a filament-type precursor fiber for the activated carbon fiber and has a strength of 0.01 to 1.0 g/denier so as to have improved durability.

First claim

1 . A filament-type activated carbon fiber that is manufactured by activating a filament-type precursor fiber for the activated carbon fiber and has a strength of 0.01 to 1.0 g/denier.

2 . The filament-type activated carbon fiber of claim 1 , wherein the filament-type precursor fiber for the activated carbon fiber is selected from the group consisting of a cellulose-based filament-type precursor fiber, a polyacrylonitrile-based filament-type precursor fiber, and an aramid-based filament-type precursor fiber.

3 . The filament-type activated carbon fiber of claim 1 , wherein the filament-type precursor fiber has a strength of 5 to 12 g/denier.

4 . The filament-type activated carbon fiber of claim 1 , wherein the filament-type precursor fiber has a single-yarn fineness of 0.05 to 10 denier and a total fineness of 300 to 30,000 denier.

5 . A method of manufacturing an activated carbon fiber, the method comprising:
(S1) stabilizing a filament-type precursor fiber; and (S2) activating the filament-type precursor fiber by carbonizing the stabilized filament-type precursor fiber in an inactive atmosphere.

6 . The method of claim 5 , further comprising:
precipitating the filament-type precursor fiber in an alkali solution before step (S1).

7 . The method of claim 6 , wherein the filament-type precursor fiber is a cellulose-based filament-type precursor fiber or an aramid-based filament-type precursor fiber.

8 . The method of claim 5 , further comprising:
drying the filament-type precursor fiber before step (S1).

9 . The method of claim 8 , further comprising:
precipitating the filament-type precursor fiber in an alkali solution before the drying.

10 . The method of claim 8 , wherein the filament-type precursor fiber is a polyacrylonitrile-based filament-type precursor fiber.

11 . The method of claim 5 , wherein the stabilizing of step (S1) is performed using heat treatment in the inactive atmosphere at a temperature of 200 to 350° C. for 10 to 240 min when the filament-type precursor fiber is a cellulose-based filament-type precursor fiber or an aramid-based filament-type precursor fiber, and using heat treatment in ambient air at a temperature of 200 to 300° C. for 30 to 240 min when the filament-type precursor fiber is a polyacrylonitrile-based filament-type precursor fiber.

12 . The method of claim 5 , wherein the activating of step (S2) is performed at a temperature of 650 to 1,050° C. after low-temperature carbonization in the inactive atmosphere at a temperature of 300 to 500° C. for 1 to 30 min when the filament-type precursor fiber is a cellulose-based filament-type precursor fiber or an aramid-based filament-type precursor fiber, and at the temperature of 650 to 1,050° C. after high-temperature carbonization in the inactive atmosphere at a temperature of 500 to 950° C. for 1 to 30 min when the filament-type precursor fiber is a polyacrylonitrile-based filament-type precursor fiber.

13 . The method of claim 6 , wherein the alkali solution is selected from the group consisting of a phosphoric acid aqueous solution, an ammonium phosphate aqueous solution, and a zinc chloride aqueous solution.

14 . The method of claim 8 , wherein the drying is performed using heat treatment at a temperature of 100 to 150° C.

15 . A woven fabric manufactured using the activated carbon fiber of claim 1 .

16 . A knitted fabric manufactured using the activated carbon fiber of claim 1 .

17 . The method of claim 9 , wherein the alkali solution is selected from the group consisting of a phosphoric acid aqueous solution, an ammonium phosphate aqueous solution, and a zinc chloride aqueous solution.

Assignees

• Kolon Inc

Inventors

• Yoon Joon Young
• Cho Eun Jeong
• Lee Tae Sang

Classifications

• D01F9/30

  from aromatic polyamides · CPC title

• D01F9/225

  from stabilised polyacrylonitriles · CPC title

• D01F9/16 Primary

  from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate (D01F9/18 takes precedence) · CPC title

• D01F9/22

  from polyacrylonitriles · CPC title

• D01F9/28 Primary

  from polyamides · CPC title