METHOD FOR PURIFICATING CARBON NANOTUBE AND ELECTROMAGNETIC WAVE ABSORPTION MATERIAL TO INCLUDE CARBON NANOTUBE THAT FABRICATED USING THE SAME

摘要

PURPOSE: A purification method of a carbon nano tube and the electromagnetic wave absorber including the carbon nano tube are provided to obtain the carbon nano tube with high purity by removing a metallic catalyst or amorphous carbon. CONSTITUTION: A purification method of a carbon nano tube comprises the following steps: preparing the carbon nano tube in a pristine state; processing a dry purification by blowing oxidative gas at 300~550 deg C to the carbon nano tube for 1~2 hours; processing a wet purification by dipping the carbon nano tube to a purification solution at 60~90 deg C, and stirring for 1~2 hours for removing the solution. The oxidative gas is selected from air, oxygen and carbon dioxide. The purification solution is a mixture of more than substance selected from nitric acid, sulfuric acid, hydrochloric acid, and potassium permanganate.