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Title
Characterization of non-wood plant lignin and its hydromethylated derivatives by spectroscopy and self-assembling investigations
Authors
Todorciuc Tatiana Adina-Mirela Capraru Irena Kratochvilova and Valentin I. Popa
Received
August 26, 2009
Published
Volume 43 Issue 9-10 October-December
Keywords
lignin, hydroxymethylation, FTIR, UV-VIS, fluorescence, AFM
Abstract
Two types of non-wood lignins, namely wheat straw lignin (L1) and Sarkanda grass lignin (L2) (offered by Granit Recherche Dévloppement S.A., Lausanne) were characterized, together with their hydroxymethylated derivatives. To this end, the afore-mentioned lignins have been subjected to hydroxymethylation, under optimal conditions of temperature, time and pH. The unmodified and the hydroxymethylated lignins were analyzed by spectroscopic methods (FTIR, UV-VIS and fluorescence spectroscopy), and atomic force microscopy (AFM). The results point out that the reactivity level of lignin depends on its origin and structure of lignin, while the characteristics of the synthesized products result from the modifications induced by the new functional groups.
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