Neutron Radiography as a tool for monitoring the effectiveness of consolidant nanomaterials applied to the stone heritage
| Autor: | Sierra-Fernández, Aránzazu, Gómez Villalba, Luz Stella, Rabanal, M. Eugenia, Fort González, Rafael |
|---|---|
| Přispěvatelé: | Comunidad de Madrid |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Trabajo presentado en el 5th YOuth in COnservation of CUltural Heritage, celebrado en Madrid (España) del 21 al 23 de septiembre de 2016 The development of nanomaterials for the consolidation of stone heritage is crucial for the conservation science. The knowledge of the penetration depth of the consolidant product and its distribution into the stone matrix determine the treatment effectiveness. However, most of the techniques used for evaluating the penetration of consolidant products are destructive in nature, such as staining techniques or micro-drilling. The analyses of art works that constitute our cultural heritage require non-destructive and non-invasive approaches and analytical tools due to the high cultural values. Therefore, during last years, the possibility of monitoring the consolidant action in natural stone by means of neutron and X-rays radiography has been introduced (E.H. Lehmann et al. 2001). Due to its high sensitive toward hydrogen the advantage of neutron radiography is in possibility to visualize materials which can be hardly distinguished with other non-destructive techniques such as x-rays, nuclear magnetic resonance or ultrasound. Thus, this study is based on the effectiveness and stability research of a new consolidant product based on Mg(OH)2 nanoparticles designs in order to protect the calcium-magnesium substrates (Sierra-Fernández et al. 2014). The nanomaterial has been applied in dolostone specimens both by brushing and capillary absorption and the penetration depth and its distribution into the stone has been monitored by neutron radiography. The results showed that the nanomaterial can easily penetrate into the stone. However, at the drying phase the application method had important implication for the migration of the nanomaterials, reaching a maximum particle penetration of 1.52 cm in the dolostone treated by capillary absorption. Neutron radiography has proved to be an excellent tool to monitor clearly the Mg(OH)2 nanoparticles solution content in porous carbonate stone non-destructively with good spatial and time resolution. Research funded by Geomaterials 2 (S2013/MIT_2914) Programme |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|