| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pessanha, Sofia
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2023Maternal methylmercury exposure during early-life periods adversely affects mature enamel structure of offspring rats at human exposure levelscitations
- 2022Characterization of binders and pigments using an integrated analytical approach: Application to wooden reliefs created by Vasko Lipovac in the 1970scitations
- 2021Investigation of inks, pigments and paper in four Moroccan illuminated manuscripts dated to the eighteenth centurycitations
- 2020Evaluation of the effect of fluorinated tooth bleaching products using polarized Raman microscopy and particle induced gamma-ray emissioncitations
- 2019Josefa d' Óbidos workshop from panel to canvas. Multianalytical approach to materials and technical evolution of the most significant Portuguese painting workshop of the 17 th centurycitations
- 2016Distribution of toxic elements in teeth treated with amalgam using mu-energy dispersive X-ray fluorescencecitations
- 2016Jose de Escovar at the Chapel of the Souls: Technical and material study of a 1603 panel painting
- 2016Artificial aging paper to assess long-term effects of conservative treatment. Monitoring by infrared spectroscopy (ATR-FTIR), X-ray diffraction (XRD), and energy dispersive X-ray fluorescence (EDXRF)citations
- 2015Microscopy and X-Ray Spectroscopy Analyses for assessment gilding and silvering techniques of Portuguese illuminated manuscriptscitations
- 2015Nondestructive analysis of Portuguese “dinheiros” using XRF: overcoming patina constraintscitations
- 2009Comparison of matrix effects on portable and stationary XRF spectrometers for cultural heritage samplescitations
- 2009Efficacy of Waterborne Polyurethane to Prevent the Enzymatic Attack on Paper-Based Materialscitations
- 2008Analysis of a coloured Dutch map from the eighteenth centurycitations
Places of action
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article
Efficacy of Waterborne Polyurethane to Prevent the Enzymatic Attack on Paper-Based Materials
Abstract
The chemical and biological deterioration of paper-based materials is mainly due to the degradation of its main component, the cellulose. However, paper also contains small amounts of organic and inorganic additives which might influence its biodegradability. To protect the paper-based materials against various degradative agents, coating treatments with polymeric materials might be developed. In this study, the protective effect of commercial waterborne polyurethanes (WPU) against an enzymatic attack was investigated. Uncoated and coated samples with WPU of newsprint were subjected to degradation by enzymatic complexes (cellulosomes) produced by Clostridium cellulolyticum for different incubation times and then characterized using several analytical techniques (energy dispersive X-ray fluorescence, scanning electron microscopy, nuclear magnetic resonance, Raman and infrared spectroscopy) with the aim to assess if waterborne polyurethanes can be used in paper conservation, looking at their efficacy against the biodegradation induced by enzymes. The selected waterborne polyurethanes showed a high effectiveness in the protection of paper-based materials when they were submitted to the enzymatic attack. Indeed, their presence delayed the destruction of the cellulose matrix and the release of both soluble sugars and paper additives. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 113: 2030-2040, 2009