Nanostructured bio-based castor oil organogels for the cleaning of artworks.

Autor: Poggi G; Department of Chemistry 'Ugo Schiff' and CSGI, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, (FI), Italy., Santan HD; Department of Chemistry 'Ugo Schiff' and CSGI, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, (FI), Italy., Smets J; The Procter & Gamble Company, 1853 Strombeek-Bever, Brussels, Belgium., Chelazzi D; Department of Chemistry 'Ugo Schiff' and CSGI, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, (FI), Italy., Noferini D; European Spallation Source ERIC, 224 84 Lund, Skåne County, Sweden; Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum, Forschungszentrum Jülich GmbH, Lichtenbergstrasse 1, Garching, Garching., Petruzzellis ML; Peggy Guggenheim Collection, Dorsoduro 701, 30123 Venice, Italy., Pensabene Buemi L; Peggy Guggenheim Collection, Dorsoduro 701, 30123 Venice, Italy., Fratini E; Department of Chemistry 'Ugo Schiff' and CSGI, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, (FI), Italy. Electronic address: emiliano.fratini@unifi.it., Baglioni P; Department of Chemistry 'Ugo Schiff' and CSGI, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, (FI), Italy. Electronic address: baglioni@csgi.unifi.it.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2023 May 15; Vol. 638, pp. 363-374. Date of Electronic Publication: 2023 Feb 01.
DOI: 10.1016/j.jcis.2023.01.119
Abstrakt: Hypothesis: Organic solvents are often used for cleaning highly water-sensitive artifacts in modern/contemporary art. Due to the toxicity of most solvents, confining systems must be formulated to use these fluids in a safe and controlled way. We propose here castor oil (CO) organogels, obtained thorough cost-effective sustainable polyurethane crosslinking. This methodology is complementary to previously demonstrated hydrogels, when conservators opt for organic solvents over aqueous formulations.
Experiments: The gels were characterized via Small-angle Neutron Scattering and rheology before and after swelling in two organic solvents commonly adopted in cleaning paintings. The removal of a photo-aged acrylic-ketonic varnish was evaluated under visible and ultraviolet light, and with FTIR 2D imaging.
Findings: The new gels are dry systems that can be easily stored and loaded with solvents before use. Their nanoscale organization, viscoelasticity and cleaning action are controlled changing the amount of crosslinking, the polymeric backbone, and the loaded solvents. The fluids are confined in the nanosized polymeric mesh of the gels, which are highly retentive, granting controlled release over delicate paint layers, and transparent, allowing monitoring of the cleaning process. These features, along with their sustainable synthesis, candidate the CO organogels as feasible solutions for cultural heritage preservation, expanding the palette of advanced tools for conservators over traditional thickeners.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: