Méthodologie de transformation chimique du bois : étude des propriétés des nouveaux matériaux modifiés

Abstract : The studydeals with the research of new methods of chemical modification of wood in order to give to the material new properties and to improve its stability. In the frrst part, the chemical modifications carried out on sawdusts prepare the material for removal ions by grafting acid carboxylic and quaternary ammmonium groups with wood. On the one hand, sawdusts are esterified with succinic anhydride and the reaction is improved. 011 the other hand, sawdusts are graft-copolymerized with acrylié acid or 2-(methacryloyloxyethryl)trimethylarnmonium chloride using KMn04 .as initiator. The studies by SEM, IR and NMR H and 13C show that lignin is more reactive the holocellulose.The modified sawdusts show good capacities to extract heavy metals and dyes. In the second part, the chemical modifications are devoted to graft new byproducts of glycerol onto wood in order to improve the dimensionnal stability of material. Epoxypolyglycerols and,polyglycerol methacrylates are prepared. These products give good A.S.E. for the material.
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Véronique Marchetti-Georges. Méthodologie de transformation chimique du bois : étude des propriétés des nouveaux matériaux modifiés. Autre. Université Henri Poincaré - Nancy 1, 1998. Français. ⟨NNT : 1998NAN10258⟩. ⟨tel-01747111⟩

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