Direct fluorination applied to wood flour used as a reinforcement for polymers

Florence Saulniera (1) , Marc Dubois (2) , Karine Charlet (1) , Lawrence Frézet (2) , Alexis Beakou (1)

1 IP - Institut Pascal
2 ICCF - Institut de Chimie de Clermont-Ferrand

Direct fluorination was applied to wood flour in order to improve its compatibility with polymers and thus enhance the properties of wood-polymer composites. Fourier-transform infrared spectra and 19F solidstate nuclear magnetic resonance results underlined a successful covalent grafting of fluorine atoms onto the wood chemical structure. No physical damage of the wood particles was observed during scanning electron microscopy analysis. The thermal behaviour of the wood flour was also studied by thermogravimetric analysis. The hydrophilic property changes of wood flour were examined by evaluating the water content and the rate of water uptake of samples under different relative humidity conditions. A decrease in the wood flour water content was noted after fluorination. All these studies tend to prove the efficiency of this treatment on wood hydrophilia

Mots clés: Wood flour Direct fluorination Water content

Florence Saulniera, Marc Dubois, Karine Charlet, Lawrence Frézet, Alexis Beakou. Direct fluorination applied to wood flour used as a reinforcement for polymers. Carbohydrate Polymers, 2013, 94, pp.642-646. ⟨hal-00812677⟩