APPLICATIONS OF ULTRASOUND IN MANUFACTURING PROCESS OF ELECTRIC CONDUCTIVE COATINGS BASED ON CARBON MATERIALS

Abstract

Development of the basics of technology for obtaining electrically conductive coatings using ultrasonic dispersion of carbon materials.
Methods. The  following  methods  were  used  in  the  work:  ultrasonic  dispersion  of  materials,  optical microscopy,  four-electrode  method  of  measuring  the  electrical  conductivity  of  coatings.  The  shielding
effectiveness of materials was performed following ASTM D4935. The research results were processed using computer programs Microsoft office Excel and ImageJ. Results. The ultrasound treatment of carbon materials with a high specific surface area was performed. The influence of ultrasonic treatment on the efficiency of dispersion of carbon black in ethanol was established. The  parameters  of  the  process  of  destruction  of  natural  graphite  particles  under  the  action  of  ultrasonic treatment are determined. The mechanism of structure formation into the composite material after ultrasonic treatment  was  proposed.  The  process  of  forming  a  spatial  electrically  conductive  grid  in  a  suspension  by
dispersed carbon black was established. It was shown that the use of ultrasonic treatment in the production of electromagnetic shielding materials allows to obtain oriented particles of the carbon component in the polymer matrix of the carrier and to get samples with high surface conductivity and shielding efficiency. Scientific novelty. The influence of ultrasonic treatment of carbon materials on the fabrication process,
structure, and properties of shielding materials was established.
Practical significance. The basics of the technology of the manufacturing process of shielding materials based on carbon materials pre-dispersed using ultrasonic treatment were developed. The optimal parameters of
ultrasonic treatment of carbon materials for manufacturing shielding materials were substantiated.