Organic-inorganic material for the consolidation of plaster |
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| Authors: | Jean-Marc Tulliani Alessandra Formia Marco Sangermano |
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| Institution: | Department of Materials Science and Chemical Engineering, Politecnico di Torino (I), INSTM R.U PoliTO-LINCE Lab, Corso Duca degli Abruzzi 24, 10129 Torino, Italy |
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| Abstract: | Organic-inorganic materials to be used as hydrophobic consolidants for plasters were synthesized starting from an inorganic precursor (Tetraethoxysilane TEOS]), added to a polysiloxane epoxy formulation and thermally cured with Ytterbium as acid catalyst. The TEOS reduces the viscosity of the resin, contributing to the mechanical properties of the film, without causing cracking. Solvents, that are harmful for workers and environment and show some drawbacks in the practice of restoration, were not used. The film properties and the formation of silica clusters were investigated. The products were applied by brush on plaster's samples and their compatibility and effectiveness were verified. Thanks to the organic content, the products penetrate deeply, are more stable to photo-oxidative degradation, and the hydrophobicity of the resin, provided by the silicone component, is not altered. |
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| Keywords: | Plaster consolidation Organic-inorganic hybrids Tetraethoxysilane (TEOS) Compatibility Solvent free |
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