WATER-BASED PIEZORESISTIVE CONDUCTIVE POLYMERIC PAINT CONTAINING GRAPHENE FOR ELECTROMAGNETIC AND SENSOR APPLICATIONS

摘要

A water-based conductive polymeric paint for providing thin conductive, antistatic, and possibly piezoresistive coatings, is produced starting from a liquid water-based polymer or else from a water-based polymeric paint filled with graphene nanoplatelets (GNPs), obtained by exfoliation of expanded graphite. The process envisages the following steps: a) subjecting to thermal expansion commercial graphite intercalation compound (GIC) to obtain known structures such as TEGO, WEG, or expanded graphite (EG), or else using EG of a commercial type; b) dispersing and shredding the TEGO, WEG, or EG structures in water-based paint/polymer possibly diluted with alcohol-water mixture, in variable concentrations according to the desired final properties; c) subjecting the suspension to ultrasonication, where the parameters of the sonication cycle such as temperature of the suspension, energy released, and duration are defined on the basis of the properties of the material that is to be obtained.