Continuous method and apparatus for functionalizing carbon nanotube

A continuous apparatus for functionalizing a carbon nanotube, comprising:

• a mixing and feeding part that prepares a carbon nanotube solution by mixing nitro compound according to Chemical Formula 1, a carbon nanotube, and a solvent
• a preheater that preheats the prepared carbon nanotube solution to a temperature of 100 to 370° C. in the mixing and feeding part;
• a functionalizing reactor under a subcritical water or supercritical water condition that forms a carbon nanotube mixture by mixing the carbon nanotube solution through the preheater with an oxidizer fed under 50 to 400 atm at the front end of the functionalizing reactor, feeds the carbon nanotube mixing solution under 50 to 400 atm, and treats the carbon nanotube mixture under 50 to 400 atm;
• a quenching and pH adjusting part that quenches the functionalized product in the functionalizing reactor into a temperature of 200 to 300° C. and at the same time, adjusts pH thereof;
• a cooling down and depressurizing system that cools down and depressurizes the quenched and pH adjusted product into 0 to 100° C. and 1 to 10 atm;
• and
• a product storing part that recovers the product through the cool down and depressurizing part;
• R—(NOx)y [Chemical Formula 1]
• wherein Chemical Formula 1, R is alkyl group of C1 to C7 or aryl group of C6 to C20 and x and y are integers of 1 to 3 independently.