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Bioactive nanocomposites for the control of stone monuments biodeterioration


A conservation treatment of stone monuments meant for consolidation, protection, and inhibition of biofilm formation is proposed. This systematic investigation is aimed at producing nanocomposite coatings able to exert a marked biological activity over a long period of time thanks to their peculiar structure. The coatings contain bioactive copper or zinc oxide nanoparticles (NPs), which are embedded in commercially available and commonly used consolidant/water repellent matrices based on tetraethoxysilane and/or polysiloxanes. Characterisation was performed with XPS and spectrophotometry and metal release studies were carried out with ICP-MS. In a second step, the nanomaterials were applied on stone samples and studied with SEM and spectrophotocolorimetry. Then, experimentation in situ was undertaken by applying nanocomposite coatings on the exterior of a 12th-century church in the south of Italy and the performances were successfully tested and monitored for more than a year by means of colorimetry and biomolecular techniques.


In situ experimentation of bioactive nanocomposites: San Leonardo di Siponto (Manfredonia, Italy)


Published papers
van der Werf I.D., Ditaranto N., Picca R.A., Sportelli M.C., Sabbatini L., "Preventive conservation of stone monuments with bioactive nanocomposites", submitted to Heritage Science
Ditaranto N., van der Werf I.D., Picca R.A., Sportelli M.C., Giannossa L.C., Bonerba E., Tantillo G., Sabbatini L., "Characterization and behaviour of ZnO-based nanocomposites designed for the control of stone monuments biodeterioration", submitted to New Journal of Chemistry
Modelli L., Materiali nanostrutturati per la lotta al biodeterioramento dei materiali lapidei, MSc thesis, 2012-2013, University of Bari Aldo Moro
Ciasca A., Preparazione, caratterizzazione ed applicazione di nanocompositi bioattivi per la conservazione del materiale lapideo, MSc thesis, 2013-2014, University of Bari Aldo Moro
Guagnano R., Nanocompositi innovativi a base di titania per la prevenzione del degrado di substrati lapidei, BSc thesis, 2013-2014, University of Bari Aldo Moro
Degennaro M., Caratterizzazione molecolare della colonizzazione microbica di un monumento lapideo allo scopo di pilotare la sintesi di nanoparticelle per il suo restauro, MSc thesis, 2012-2013, University of Bari Aldo Moro


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