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Pure and Applied Chemistry

The Scientific Journal of IUPAC

Ed. by Burrows, Hugh / Stohner, Jürgen

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IMPACT FACTOR 2017: 5.294

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1365-3075
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Volume 89, Issue 1

Issues

Organogels for the cleaning of artifacts

Maria Diletta Pianorsi
  • Department of Chemistry Ugo Schiff and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
  • Other articles by this author:
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/ Martina Raudino
  • Department of Chemistry Ugo Schiff and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
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/ Nicole Bonelli
  • Department of Chemistry Ugo Schiff and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
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/ David Chelazzi
  • Department of Chemistry Ugo Schiff and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
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/ Rodorico Giorgi
  • Department of Chemistry Ugo Schiff and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
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/ Emiliano Fratini
  • Department of Chemistry Ugo Schiff and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
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/ Piero Baglioni
  • Corresponding author
  • Department of Chemistry Ugo Schiff and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, Italy
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Published Online: 2017-01-20 | DOI: https://doi.org/10.1515/pac-2016-0908

Abstract

The cleaning of artifacts must not alter the original properties of the objects. While the use of free solvents is risky, their confinement into polymeric networks can allow the safe removal of unwanted layers from artifacts. Recently, a methyl 2-methylprop-2-enoate (MMA)-based organogel was formulated as loaded with butan-2-one (MEK), and used to remove aged varnishes from canvas paintings. However, this formulation is not enough retentive to allow its use on paper, where higher retentiveness is needed to avoid the uncontrolled spreading of MEK and dissolved materials. Here, a new PMMA-MEK gel was designed to overcome this limitation. The amount of cross-linker and monomer used in the synthesis of the gel were tuned to achieve optimal retentiveness. Differential scanning calorimetry (DSC), differential thermogravimetry (DTG), small-angle X-ray scattering (SAXS) and attenuated total reflection fourier transform infrared spectroscopy (ATR-FTIR) provided information on the solvent content, release rate, and mesoporosity of the gel as compared to the previous system. The lower solvent release rate of the new formulation allowed the safe removal of wax that jeopardized a 19th century paper document. The removal was confirmed through optical microscopy and ATR-FTIR, which also highlighted the absence of gel residues on the treated surface.

Keywords: cleaning; colloids; methyl methacrylate; organogels; paper artworks; POC-16

Article note:

A collection of invited papers based on presentations at the 16th International Conference on Polymers and Organics Chemistry (POC-16), Hersonissos (near Heraklion), Crete, Greece, 13–16 June 2016.

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About the article

Published Online: 2017-01-20

Published in Print: 2017-01-01


Funding Source: Ministero dell’Istruzione, dell’Università e della Ricerca

Award identifier / Grant number: 646063

CSGI and European Union (project NANORESTART, H2020-NMP-21-2014/646063) are acknowledged for financial support. The authors acknowledge Maria Chiara Sbolci (University of Florence) for her cooperation during the tests on the 19th century missal. Ministero dell’Istruzione, dell’Università e della Ricerca, (Grant/Award Number: 646063) Horizon 2020.


Citation Information: Pure and Applied Chemistry, Volume 89, Issue 1, Pages 3–17, ISSN (Online) 1365-3075, ISSN (Print) 0033-4545, DOI: https://doi.org/10.1515/pac-2016-0908.

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