TECHNICAL FEASIBILITY TO PRODUCE MODIFIED PHENOLS FROM LIGNOCELLULOSIC MATERIALS

摘要

The possible aplications of polymeric materials from renewable resourses depends on some modifications in the lignins structure. Two different samples of lignins were used; kraft lignin from E. grandis and solid lignocellulosic materials. The objective of this work is to obtain modified phenols and little poliphenols to use in copoliesters. We use two processes: enzymatic modifications of kraft lignins and solid fermentation to modificate lignocellulosic matherials. The enzymatic extracts of P. chrysosporium and G. trabeum had Lig-peroxidase 20UE/ml, Lacasse 10UE/ml and Demethylase activity 5UE /ml. The solid fermentation process was done during 30 days at room temperature. The lignocellulosic materials were inoculated whith P. chrysosporium culture 5% w/w and G. trabeum culture 5% w/w. The humidity was 70% and was necessary to remove the materials each 5 days to incorporate oxygen. The molecular weight and OH groups from the modificated phenols were determinated. We believed that this work showed a good approximation in the standardized productions of modified phenols to use in different macromolecules formulations. Same applications were done in copoliesters with good characteristics. In the future we study the production of this polymers and different applications.