Silver nanoparticles-based hydrogels synthetized by ionizing radiation for cleaning of tangible cultural heritage surfaces. (October 2022)

• Record Type: Journal Article
• Authors: José Alves Oliveira, Maria; Otubo, Larissa; Pires, Adriana; Fernando Brambilla, Rodrigo; Cristina Carvalho, Ana; Santos, Paulo S.; Oliveira Neto, Almir; Vasquez, Pablo
• Is Part Of: Radiation physics and chemistry. Volume 199(2022)
• Publication Date: 2022-10
• Subjects: Hydrogel -- Cultural heritage -- AgNP -- Ionizing radiation -- Tangible material; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2022.110345
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: The surfaces of the works of art are one of their most important parts since they interact directly with the observer's perception. On the other hand, they are also in direct contact with physical, chemical and biological agents that can induce degradation and signs of aging. Dust deposits, stains and aged layers of protection can degrade, causing irreversible damage to works of art. In this way, the removal of undesirable materials from artistic surfaces is essential to preserve cultural heritage articles. The aim of this work was to develop silver nanoparticles-based hydrogels and to study the behavior regarding solvent concentration, stability and ability to clean dirt samples based on paper and canvas. The hydrogels were synthesized (reticulated) by gamma rays having the simultaneous formation of silver nanoparticles (AgNP) in the same process. The samples were characterized by swelling tests, attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR), Raman spectroscopy, differential scanning calorimetry (DSC), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and optical microscopy (OM). The results showed the removal of dirt from the paper samples, as well as the softening of the dirt from the canvas, without leaving residues and without affecting the integrity of the art works submitted to treatment. Highlights: The hydrogel is capable of removing dirt from paper and fabric. Cleaning with hydrogels does not affect the integrity of cultural heritage. Crosslinking, non-reducing silver reduction and sterilization by gamma radiation.