Preparation method of conductive sponge having effect of shielding electromagnetic wave

Abstract

A preparation method of a conductive sponge includes the following steps. First, a sponge substrate is dipped in a metal solution and then taken out. A first drying process is performed. Next, the sponge substrate plated with metal particles is dipped in a carbon nanomaterial suspension and then taken out. Then, a second drying process is performed.

What is claimed is: 
     
         1 . A preparation method of a conductive sponge, comprising:
 dipping a sponge substrate in a metal solution and then taking out the sponge substrate;   performing a first drying process on the sponge substrate dipped in the metal solution;   dipping the sponge substrate in a carbon nanomaterial suspension after the first drying process and then taking out the sponge substrate; and   performing a second drying process on the sponge substrate dipped in the carbon nanomaterial suspension.   
     
     
         2 . The preparation method of a conductive sponge of  claim 1 , wherein a material of the sponge substrate comprises melamine or polyurethane. 
     
     
         3 . The preparation method of a conductive sponge of  claim 1 , wherein the metal solution comprises a silver ion solution, a nickel ion solution, an iron ion solution, or a cobalt ion solution. 
     
     
         4 . The preparation method of a conductive sponge of  claim 1 , wherein the metal solution comprises a silver nitrate solution, a nickel nitrate solution, or a copper nitrate solution. 
     
     
         5 . The preparation method of a conductive sponge of  claim 1 , wherein a solute of the carbon nanomaterial suspension comprises carbon black, carbon nanotube, graphene, or carbon aerogel. 
     
     
         6 . The preparation method of a conductive sponge of  claim 1 , further comprising, before the sponge substrate is dipped in the metal solution, performing a sensitizing treatment. 
     
     
         7 . The preparation method of a conductive sponge of  claim 6 , further comprising, after the sensitizing treatment is performed and before the sponge substrate is dipped in the metal solution, performing an activation treatment. 
     
     
         8 . The preparation method of a conductive sponge of  claim 1 , further comprising, after the second drying process is performed, dipping the sponge substrate dipped in the carbon nanomaterial suspension in a polydimethylsiloxane solution and then taking out the sponge substrate. 
     
     
         9 . The preparation method of a conductive sponge of  claim 1 , further comprising, after the second drying process is performed, performing a heat-resistant adhesive covering process to cover the sponge substrate with a heat-resistant adhesive.