UJI faculty participates in an international project that uses nanoparticles for the restoration of historical and cultural heritage



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## UJI faculty participates in an international project that uses nanoparticles for the restoration of historical and cultural heritage

20/04/2017 |
SCP

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The Solid State Chemistry Group from the Universitat Jaume I, together with the Conservation, Restoration and Research Unit of the Valencian Institute for the Conservation and Restoration of Cultural Property (IVC+R) CulturArts from the Valencian Regional Government, in collaboration with the Federal University of São Carlos (UFSCar) and the Functional Materials Development Centre/Paulista State University of Brazil (CDMF) have developed nanostructured materials based on calcium and barium with viable applications in restoration treatments, such as the consolidation and surface protection of Goods of Cultural Interest in stone support and parietal decorations. This multidisciplinary collaboration has allowed opening a new line of research in the field of materials.

The study is a result of the line of research currently being developed by UJI doctoral student Livio Ferrazza, led by professors Eloísa Cordoncillo and Héctor Beltrán Mir, in collaboration with Thales Machado, researcher in pre-doctoral training of the Santiago Grisolía programme at the UJI who defended his thesis at the Federal University of São Carlos under the direction of the professor and director of the CDMF Elson Longo. The work focuses on the study of different inorganic nanostructured materials that can be applied in the restoration treatments of historical-artistic buildings.

This multidisciplinary collaboration has allowed opening a new line of research in the field of materials, an area where the professor Elson Longo, director of the Brazilian group, and the Group of Theoretical and Computational Chemistry from the UJI directed by professor Juan Andrés Bort are working together since more than 25 years ago.

"The main purpose of the project is to have new materials optimized for restoration treatments, which can be obtained through cheap synthesis routes and in aqueous media," explains Dr. Machado. In this way, new products compatible with the materials of the works to be treated, not harmful to human health and to the environment, will be available.

Together with IVC+R technicians, the nanoparticles have been evaluated in their possible action as consolidators and protectors in stone specimens from the main cover of the Church of Our Lady of the Assumption in the town of Corral de Almaguer in Toledo, as well as in fragments of mural painting from the archaeological site of the House of Ariadna in Pompeii.

The efficiency of the materials is being analysed in the stone coming from the main facade of the Toledo church and the first results obtained have been promising. Studies of SEM-EDX, XRD, FTIR and colorimetric coordinate measurements, among others, have shown that no changes have been observed in the surface characteristics of the stone support and the mural painting after the application of the nanoparticles (colour, texture, morphology), keeping intact the original characteristics of the substrate treated. Researchers have also appreciated that the developed nanoparticles allow consolidating and protecting the material, thus increasing its mechanical resistance against future mechanisms of chemical, physical or biological alteration that causes disintegration and pulverization.

**Publications**

Livio Ferrazza; David Juanes Barber; Eloísa Cordoncillo; Héctor Beltrán Mir. “La investigación científica aplicada en el proyecto de conservación de la portada renacentista de la Iglesia de Nuestra Señora de la Asunción de Corral de Almaguer (Toledo)”. Actas de EMERGE 2014 - Jornadas de Investigación Emergente en Conservación y Restauración de Patrimonio. pp. 773 - 781. Editorial Universitat Politècnica de València, 2014.

Livio Ferrazza; David Juanes Barber; Eloísa Cordoncillo; Héctor Beltrán Mir. “Stone Heritage: VP-SEM as non-destructive technical in the evaluation of the influence of the petrophysical characteristics in the consolidation treatments”. Actas del art’14. 11th international conference on non-destructive investigations and microanalysis for the diagnostics and conservation of cultural environmental heritage. Madrid, 2014.

**Text extracted in large part from the original article by Jose Angelo Santilli from the Centre for the Development of Functional Materials in Brazil and the journal *Pesquisa FAPESP*.**

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