Etude de systèmes de finitions pour bois : application de nouvelles formulations, vieillissement et amélioration des performances

Abstract : The durability of a finish applied onto wood is generally affected by the natural origin of the material and merely by its anatomy and the presence of extractives. In the first part of this work, the photocurable finishes used in industrial joinery were studied because of their advantages and especially the reduction of Volatile Organic Compounds (VOC). The reaction of polymerization of acrylic resins was investigated using photocalorimetry under monochromatic radiation at 366, 420, 440 and 450 nm, with a filter at 450 nm and with the overall light spectrum. The results obtained show that solar light allows the curing reaction if some improved photoinitiators are used (2nd generation photoinitiators). The influence of UV absorbers -on the polymerization initiated by these products- was also studied. The performances of complete finishing systems were evaluated in an accelerated weathering test in QUV. The second part of the work is an exploratory study aiming to develop nanodisperse inorganic UV absorbers with optimized composition and morphology. Three compounds were thus tested namely CUB, HTB and RNE. Nevertheless their performances appeared quite insufficient during an accelerated weathering test simulating outside conditions.
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Youcef Irmouli. Etude de systèmes de finitions pour bois : application de nouvelles formulations, vieillissement et amélioration des performances. Biologie végétale. Université Henri Poincaré - Nancy 1, 2007. Français. ⟨NNT : 2007NAN10128⟩. ⟨tel-01748254⟩

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