Activated carbon fiber and preparation method therefor

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.

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.