COATING MATERIAL FOR SHIELDING ELECTROMAGNETIC WAVES CONTAINING POLYVINYLIDENE FLUORIDE, POLYVINYL PYRROLIDONE RESIN AND CARBON NANO TUBE AND PREPARATION THEREOF

摘要

PURPOSE: Provided is a coating material for shielding electromagnetic waves using polyvinylidene fluoride, polyvinyl pyrrolidone resin as a binder and carbon nano tube as a filler. The material has excellent processability, bonding property as well as the good property of shielding electromagnetic waves and conductivity and is used for interior coating of buildings and the housing of electronic products. CONSTITUTION: The coating material comprises 3-7wt.% of polyvinylidene fluoride, 3-7wt.% of polyvinyl pyrrolidone, 81-92wt.% of N-methyl pyrrolidone and 2-5wt.% of carbon nano tube. The method of preparing the coating material comprises the steps of: mixing 3-7wt.% of polyvinylidene fluoride, 3-7wt.% of polyvinyl pyrrolidone and 81-92wt.% of N-methyl pyrrolidone for 30 minutes to 1 hour to make a resin solution; mixing 95-98wt.% of the above solution with 2-5wt.% of carbon nano tube; and stirring at room temperature to 60deg.C for 30 minutes to 1 hour in order to homogenously disperse and impregnate the carbon nano tube.