Fig. 1 Used mask to define the test area for the graffiti simulation.
Fig. 2 Gloss change after removal cycles using MEK (M) and commercial remover (X) means for the wrinkled surface samples.
Fig. 3 1W sample after 8 removal cycles using commercial remover.
Fig. 4 Surface of sample 1S after different UV-B exposure time.
Fig. 5 Gloss change during UV-B exposure time for the studied samples.
Fig. 6 Colour change during UV-B exposure time for the studied samples.
Fig. 7 Impedance diagrams (modulus and phase) of 1S sample at different UV-B exposure time.
Fig. 8 Impedance diagrams (modulus and phase) of 2S sample at different UV-B exposure time.
Fig. 9 Coating capacitance obtained from the fitting of EIS data at different UV-B exposure time for samples 1S and 2S.
Fig. 11 EIS Modulus and phase of sample 1S in function of contact time with commercial remover.
Fig. 10 Pore resistance obtained from the fitting of EIS data at different UV-B exposure time for samples 1S and 2S.
Fig. 12. Coating capacitance obtained by fitting EIS data for sample 1S after different time in contact with commercial remover.
Fig. 13 Coating resistance obtained by fitting EIS data for sample 1S after different time in contact with commercial remover.
Fig. 14 surface of sample 1S after 10 hours of contact with commercial remover.
Table 1 Studied samples with surface finishing and polymeric matrix characteristics
Table 2 Number of cycles of graffiti removal effectiveness of the different studied removers
References
- M. Lettieri and M. Masieri, Appl. Surf. Sci., 288, 466 (2014). https://doi.org/10.1016/j.apsusc.2013.10.056
- T. Bengtsson, Proc. European Coatings Conference Antigraffiti Coatings, p. 169, Berlin, Germany (1999).
- D. Perlman and R. H. Black, Anti-graffiti coatings and method of graffiti removal, US Patent 5,773,091 (1998).
- R. H. Black, Anti-graffiti coating material and method of using same, US Patent 5,387,434 (1995).
- M. Licchelli, S. J. Marzolla, A. Poggi, and C. Zanchi, J. Cult.Herit., 12, 34 (2011). https://doi.org/10.1016/j.culher.2010.07.002
- G. N. Manvi, A. R. Singh, R. N. Jagtap, and D. C. Kothar, Prog. Org. Coat., 75, 139 (2012). https://doi.org/10.1016/j.porgcoat.2012.04.007
- A. R. Mohammad, M. Mohseni, S. M. Mirabedini, and M. T. Hashemi, Appl. Surf. Sci., 258, 4391 (2012). https://doi.org/10.1016/j.apsusc.2011.12.123
- D. K. Chattopadhyay and K. V. S. N. Raju, Prog. Polym. Sci., 32, 352 (2007). https://doi.org/10.1016/j.progpolymsci.2006.05.003
- Y. Zhang, J. Maxted, A. Barber, C. Lowe C, and R. Smith, Polym. Degrad. Stabil., 98, 527 (2013). https://doi.org/10.1016/j.polymdegradstab.2012.12.003
- F. Schmitt, A. Wenning, and J. V. Weiss, Prog. Org. Coat., 34, 227 (1998). https://doi.org/10.1016/S0300-9440(98)00036-8
- G. Avar, U. Meier-Westhues, H. Casselmann, and D. Achten, Polym. Sci., 10, 441 (2012).
- K. McLaren, J. Soc. Dyers Colour, 92, 338 (1976).
- G. Wyszecki and W. S. Stiles, Colour science; concepts and methods, quantitative data and formulae, 2nd ed., John Wiley & Sons, New York (2000).
- S. Amand, M. Musiani, M. E. Orazem, N. Pebere, B. Tribollet, and V. Vivier, Electrochim. Acta, 87, 693 (2013). https://doi.org/10.1016/j.electacta.2012.09.061