Because of environmental demands, various investigations are carried out in order to find and prepare environmentally friendly wood coatings, as an alternative to conventional formulations for surface treatment of wood. So, wood coatings could be prepared also from liquefied wood, obtained by a thermochemical process (solvolysis). However, the drawback of liquefied wood based coatings is in their dark brown to black colour, importantly limiting their applicability. In this thesis, attempts to prepare light liquefied wood by means of ultrafiltration are described. Lime-tree wood was liquefied by the established procedure and the liquefaction product was ultrafiltered. We stated that the colour of ultrafiltered wood was quite lighter that that of the starting liquefaction mixture. Our results also indicated that the light coloured ultrafiltered liquefied wood could be cured. Additional investigations are needed to find the most appropriate curing conditions to be able to prepare light coloured films with acceptable physical, chemical and resistance properties.
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