Polyaniline/carbon black composite and preparation method thereof

Abstract

A polyaniline/carbon black composite and a preparation method thereof are disclosed The polyaniline/carbon black composite is formed by polyaniline covering carbon black and is with core-shell structure while the polyaniline/carbon black composite contains 10-30 wt. % of carbon black. The preparation method of polyaniline/carbon black composite includes the steps of: disperse carbon black into solution to form carbon black solution, add aniline into the carbon black solution to form a first solution; dissolve ammonium persulfate into acid aqueous solution to form a second solution; add the second solution to the first solution, after reaction, through filtering and grinding to produce polyaniline/carbon black composite.

1 . A polyaniline/carbon black composite comprising:
 polyaniline covering carbon black to form polyaniline/carbon black composite;   wherein the polyaniline/carbon black composite is with core-shell structure; and   weight of the carbon black is 10-30% of weight of the polyaniline/carbon black composite.   
   
   
       2 . The composite as claimed in  claim 1 , wherein particle diameter of the carbon black is from 10 to 80 nm. 
   
   
       3 . The composite as claimed in  claim 1 , wherein particle diameter of the polyaniline/carbon black composite with core-shell structure is 50˜250 nm. 
   
   
       4 . The composite material as claimed in  claim 1 , wherein optimum weight of the carbon black is 20% of weight of the polyaniline/carbon black composite. 
   
   
       5 . A preparation method of polyaniline/carbon black composite comprising the steps of:
 dispersing carbon black into solution to form carbon black solution;   adding aniline into the carbon black solution to form a first solution;   dissolving ammonium persulfate into acid aqueous solution to form a second solution; and   adding the second solution to the first solution for reaction, and then through filtering and grinding to produce polyaniline/carbon black composite;   wherein the polyaniline/carbon is with core-shell structure; and   weight of the carbon black is 10-30% of weight of the polyaniline/carbon black composite.   
   
   
       6 . The method as claimed in  claim 5 , wherein in the step of dispersing carbon black into solution to form carbon black solution, the solution is mixture of a dispersing agent, ethanol solution and acid. 
   
   
       7 . The method as claimed in  claim 5 , wherein the step of dispersing carbon black into solution to form carbon black solution further comprising a step of ultrasound vibration. 
   
   
       8 . The method as claimed in  claim 5 , wherein in the step of dissolving ammonium persulfate into acid aqueous solution to form a second solution, the acid aqueous solution is hydrochloric acid solution. 
   
   
       9 . The method as claimed in  claim 5 , wherein reaction time of the step of adding the second solution to the first solution for reaction, and then through filtering and grinding to produce polyaniline/carbon black composite ranges from 1 to 5 hours. 
   
   
       10 . The method as claimed in  claim 9 , wherein optimum reaction time is 2 hours. 
   
   
       11 . The method as claimed in  claim 5 , wherein in the step of adding the second solution to the first solution for reaction, and then through filtering and grinding to produce polyaniline/carbon black composite, an acid rinsing step is further included between filtering and grinding. 
   
   
       12 . The method as claimed in  claim 11 , wherein hydrochloric acid is used in the acid rinsing step.