A comprehensive investigation of waste expanded polystyrene recycling by dissolution technique combined with nanoprecipitation

•PS nanoparticles are recycled from EPS waste by dissolution technique.•Solvent and anti-solvent used in this green process are renewable and non-toxic.•The recycled material shows unchanged in its chemical and semicrystalline structure.•Properties of recycled material can compete on equal terms with standard commercial.•The purity, solvent-free and quality of the recycled material assure the industrial viability.