Surface Dispersive Energy Determined with Igc - Id in Anti - 1 Graffiti - Coated Building Materials
نویسندگان
چکیده
11 Abstract 12 13 Coating building materials with anti-graffiti treatments hinders or prevents spray paint 14 adherence by generating low energy surfaces. This paper describes the effect of coating 15 cement paste, lime mortar, granite, limestone and brick with two anti-graffiti agents (a 16 water-base fluoroalkylsiloxane, “Protectosil Antigraffiti®”, and a Zr ormosil) on the 17 dispersive component of the surface energy of these five construction materials. The 18 agents were rediluted in their respective solvents at concentrations of 5 and 75 % and 19 the values were determined with inverse gas chromatography at infinite dilution (IGC20 ID). 21 22 The dispersive energy of the five materials prior to coating, ranked from highest to 23 lowest, was as follows: limestone > granite > cement paste > brick > lime mortar. After 24 application of the two anti-graffiti compounds, CF3 terminals (Protectosil) were found 25 to reduce the surface energy of both basic (limestone and lime mortar) and acidic 26 (granite) substrates more effectively than CH3 (ormosil) terminals. 27
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