Method for producing nanosilver on a large scale, method for manufacturing nanosilver-adsorbed fiber, and antibacterial fiber thereby

Abstract

A method for producing nanosilver on a large scale, a method of manufacturing nanosilver-adsorbed fiber, and an antibacterial fiber manufactured thereby. The nanosilver having a size of 5 nm or less can be generated on a large scale by controlling a minutely electronic current between the two Ag electrodes in a water electrolysis system, while a voltage of 10,000˜300,000 is applied to two Ag electrodes. The nanosilver-adsorbed fiber is manufactured by applying the aqueous solution containing nanosilver to the surface of the synthetic fibers; adsorbing the nanosilver onto the synthetic fibers using a process selected from the group consisting of thermal fixation, high frequency radiation, bubbling, and combinations thereof; and conducting post-finishing at 160 to 200° C.

1 . A method for producing nanosilver on a large scale by using a water electrolysis system, comprising: 
 providing two Ag electrode plates;    applying a voltage of 10,000˜300,000 to said two Ag electrode plates to produce a minutely electronic current between said two Ag electrode plates, said electrode plates being equipped in the water electrolysis system; and    controlling said minutely electronic current between the two Ag electrodes in the water electrolysis system.    
   
   
       2 . The method according to  claim 1 , wherein the method for producing nanosilver on a large scale by using a water electrolysis system comprising a water reservoir having two opposite sides and a middle and provided with a water inlet valve for introducing water into said water reservoir and a water outlet valve for draining the water from said water reservoir; a DC+ electric power source and a DC− electric power source, said two Ag electrode plates being connected to said DC+ electric power source and said DC− electric source respectively, the two Ag electrode plates being provided on respective opposite sides of the water reservoir; a circuit breaker for dividing the water reservoir into two sections, being provided in the middle of the water reservoir; 
 and a groove formed by said circuit breaker, wherein said method comprises:    loading water to immerse said two Ag electrode plates in the water electrolysis system;    applying a voltage of 10,000˜300,000 to said two Ag electrode plates; and    moving said circuit breaker upwards or downwards with the voltage to control the minutely electric current between said two Ag electrode plates.    
   
   
       3 . The method according to  claim 1 , wherein the particle size of the nanosilver is 1 to 5 nm.  
   
   
       4 . A method of manufacturing nanosilver-adsorbed fiber comprising: 
 preparing an aqueous solution containing the nanosilver produced according to the method of  claim 1;     scouring and washing synthetic fibers, said synthetic fibers having a surface;    applying the aqueous solution containing the nanosilver to the surface of said synthetic fibers;    adsorbing the nanosilver onto said synthetic fibers using a process selected from the group consisting of thermal fixation, high frequency radiation, bubbling, and combinations thereof; and    conducting post-finishing at 160 to 200° C.    
   
   
       5 . The method according to  claim 4 , further comprising a dyeing process before the step of conducting post-finishing at 160 to 200° C.  
   
   
       6 . The method according to  claim 4 , wherein the thermal fixation process is conducted at a temperature from 150 to 230° C.  
   
   
       7 . The method according to  claim 4 , wherein the aqueous solution containing the nanosilver is in an amount of 10 to 100 ppm of the nanosilver.  
   
   
       8 . The method according to  claim 4 , wherein the step of applying the aqueous solution containing the nanosilver to the surface of said synthetic fibers is carried out by a process selected from the group consisting of spraying, coating and dipping.  
   
   
       9 . An antibacterial fiber having nanosilver adsorbed thereon in an amount of 0.01 to 0.1 grams per 100 grams of synthetic fibers, and being produced according to the method of  claim 4.