A linalool-based nanostructured fluid for the removal of alkyd paints

• Formulation of a linalool-based o/w microemulsion using a cationic surfactant. • Physicochemical characterization of the nanostructured fluid. • Assessment of the removal capability of tube paint and spray paint based on alkyds. • Evaluation of the removal action of vandalic tags in a real practical scenario. This study presents a novel, naturally-inspired nanostructured formulation based on an unconventional green solvent, linalool, for the removal of alkyd-based paints. Linalool is the main compound in lavender essential oil, and exhibits high chemical affinity to synthetic binders, such as alkyd resins, due to its specific solubility parameters. A linalool based microemulsion was prepared using a cationic surfactant, and its phase behaviour was systematically investigated. The morphology and structure of the micelles were also investigated and characterised by Small-Angle X-ray Scattering (SAXS). In terms of efficacy, the formulation was compared with a commercially available product well established in conservation practice for the removal of synthetic coatings. The system was tested on a laboratory scale using commercial tubes and spray paints applied on mortar mock-ups. Moreover, the system was applied on real case studies for the removal of unauthorized tags, from a cement-based facade covered with silicate-based outdoor paints. The promising results provide valuable insights into the potential application of linalool-based cleaning systems for conservation practice