Graphene-based water-repellent, conductive polymeric coatings for electromagnetic and sensor applications

摘要

Aqueous conductive polymer coatings for providing thin conductive, antistatic and possibly pressure resistant coatings are obtained by stripping expanded graphite starting from an aqueous polymeric or aqueous polymer coating filled with graphene nanoflatets (GNP). The process considers the following steps: a) thermally expanding a commercial graphite intercalation compound (GIC) to obtain a structure known as TEGO, WEG or expanded graphite (EG), or using commercial EG; b) dispersing and shredding the TEGO, WEG or EG structure in an aqueous paint / polymer that can be diluted with an alcohol-water mixture of varying concentrations according to the desired final properties; c) sonicating the suspension, wherein the sonication cycle parameters such as the temperature of the suspension, the energy released and the duration of the suspension are determined on the basis of the properties of the material to be obtained.