Synthesis and Characterization of Hydroxymethylated Lignin

Chemical modification of lignin has been studied in a wide range of reactions. Modification of lignin through reaction with formaldehyde was performed to increase number of the hydroxyl groups compared to native lignin. In the present work, systematic study on the quantitative characterization of hydroxyl groups of modified lignin and native one was performed by FT-IR and 1HNMR spectroscopies. It was found that number of hydroxyl groups increases from 6.43 in the native lignin to 7.77 mmol/g in the hydroxymethylated lignin

کلیدواژه ها:

Lignin ، Hydroxymethylation ، Characterization