OBTAINING SUSTAINABLE DISPERSIONS OF GRAPHENE NANOPLATELETS
This paper shows the possibility of using phenol-formaldehyde resin (PFR) as a surfactant in obtaining stable dispersions of graphene nanoplastic (GNP). Dispersion of oxidized GNP in an aqueous medium at 50 °C in the presence of PFR allows to obtain stable colloidal dispersions with a concentration of up to 1 %. The maximum concentration of GNP in an aqueous solution is observed at a mass ratio of 2: 1 graphene / dry residue of PFR. The resulting dispersions of GNP translated into acetone or isopropanol can be used as modifiers of epoxy resins. The advantage of using PFR as a surfactant is the absence of the need to remove it from the GNP-based nanocomposite. A preliminary experiment showed the possibility of using the obtained dispersions as an initial component in the process of synthesizing a porous carbon / GNP nanocomposite with a specific surface area of 2300–2500 m2 / g.