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Développement de vitrages organiques et hybrides à base de réseaux interpénétrés de polymères pour la protection des biens culturels

Abstract : This work position itself on a primary issue of heritage and more precisely on the preventive conservation of artworks. To provide a low cost solution to museums, capable of meeting the requirements set for the cultural heritage protection, we have developed new polymer glazing to protect works without altering their perception by the public. These materials will eventually be able to replace poly(methyl methacrylate) (PMMA) glazing, which are widely used but have high sensitivity to scratching and cleaning solvents as mains drawbacks.These materials were synthesized by combining, with various proportions, two polymers, PMMA and polycarbonate of CR39® (PCR39®), into an interpenetrating polymer network (IPN) architecture. This association generated new transparent materials (T% > 95%) of which resistance toward scratching and solvents is considerably improved compared to PMMA's one. Their ageing have been studied when exposed to artificial or natural light (UV). To improve their scratch resistance, we selectively crosslinked the PMMA phase with functionalized silica nanoparticles, leading to the formation of a new hybrid IPN. Finally, in order to obtain a smart material, we studied the possibility of integrating within these glazing, a UV sensor to warn of their presence. The PCR39® having properties consistent with the development of such a sensor, we tried to increase the sensitivity of the material. For that purpose, first an organic fluorescent compounds, and secondly an inorganic one (gadolinium oxide nanoparticles doped with terbium or europium) were incorporated in the IPN.
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https://hal.archives-ouvertes.fr/tel-01206444
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Mickael Berrebi. Développement de vitrages organiques et hybrides à base de réseaux interpénétrés de polymères pour la protection des biens culturels. Mécanique des matériaux [physics.class-ph]. Université de Cergy Pontoise, 2015. Français. ⟨NNT : 2015CERG0783⟩. ⟨tel-01206444v2⟩

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