ATMOSPHERIC PLASMA AS NEW TOOL TO REMOVE POLYMERIC COATINGS FROM ARCHEOLOGICAL POTTERY, BRICKS AND CERAMICS TILES. (Abstract/Poster in convegno)

Type
Label
  • ATMOSPHERIC PLASMA AS NEW TOOL TO REMOVE POLYMERIC COATINGS FROM ARCHEOLOGICAL POTTERY, BRICKS AND CERAMICS TILES. (Abstract/Poster in convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Alternative label
  • Nodari Luca (1), Voltolina Stefano(2), Favaro Monica(1), Verga Falzacappa Emanuele(3), Patelli Alessandro(2), Scopece Paolo(3) (2013)
    ATMOSPHERIC PLASMA AS NEW TOOL TO REMOVE POLYMERIC COATINGS FROM ARCHEOLOGICAL POTTERY, BRICKS AND CERAMICS TILES.
    in European Meeting on Ancient Ceramics, Padova, 19-21/09/2013
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Nodari Luca (1), Voltolina Stefano(2), Favaro Monica(1), Verga Falzacappa Emanuele(3), Patelli Alessandro(2), Scopece Paolo(3) (literal)
Note
  • Poster (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1ICIS, Istituto di Chimica Inorganica e delle Superfici, CNR, Area della Ricerca di Padova, Corso Stati Uniti 4, 35127 Padova, Italy 2Veneto Nanotech scpa, Via S. Crispino 106, 35129, Padova, Italy 3Nadir srl, Via F. Zugno 9, 35134, Padova Italy (literal)
Titolo
  • ATMOSPHERIC PLASMA AS NEW TOOL TO REMOVE POLYMERIC COATINGS FROM ARCHEOLOGICAL POTTERY, BRICKS AND CERAMICS TILES. (literal)
Abstract
  • The aim of the present work is the evaluation of the atmospheric plasma device in the removal of conservative polymeric coatings from archeological pottery, bricks and ceramic tiles. The same polymers used in the conservation of stone are also used either to consolidate and protect ceramic materials. In fact, polyvinyl alcohol (PVA), acrylate-metacrylate co-polimers (Paraloid) and siloxanes are used to consolidate archaeological pottery (PVA and Paraloid) or to protect wall bricks and glazed ceramics (Paraloid or acrylic- siloxane mixtures). As consolidants, these polymers are applied by brush on site when the archeological object is too fragile to be unearthed without any damage, while as protective coating they are directly applied by spraying. The main problem connected with the use of these materials concerns the difficulty in their removal especially after ageing. The traditional cleaning makes use of organic solvents, that are not fully effective, besides to be poorly sustainable. The present work deals with the use of atmospheric plasma as innovative removal tool for these coating. The atmospheric plasma consists in a cold plasma, produced at normal pressure, that can interact chemically with the coating. The removal of the coating is therefore promoted by a chemical reaction between the polymers and the radicals formed in the plasma plume. This experimentation is performed by using both a commercial transportable plasma torch and a laboratory set-up one. In the present work we consider the removal of fresh and artificially aged acrylic polymer from different ceramic materials. The experimentation can be summarized as follow: 1. Characterization of the ceramic materials, with particular attention to the surface properties; 2. assessment of the Plasma treatment on ceramics to understand possible modifications due to plasma- surface interactions; 3. evaluation of plasma cleaning on ceramics treated with the polymer, even after artificial ageing of the coating. The characterization is performed mainly by using optical and electronic microscopies, water absorption, contact angle and colorimetric measurements, together with total reflection infrared spectroscopy. The efficiency in removal is evaluated by monitoring the physico-chemical changes of the surface possibly induced by plasma treatment. The current research has been carried out in the frame of the EU Project PANNA (Plasma and Nano for New Age Soft Conservation). (literal)
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