A study of the efficient and environmentally friendly method of acetylationof lignin sulfonate biopolymer

The purpose of this work is to investigate a new method of acetylation of lignin sulfonate with cholinechloride (catalyst) that is environmentally friendly and efficient. For this purpose, the changes causedby acetylation in the structure of lignin sulfonate were investigated by FTIR analysis. The presenceof the carbonyl functional group at the wavelength of ۱۷۴۴ cm-۱ and the decrease of the hydroxylfunctional group in the range of ۳۲۰۰-۳۵۰۰ cm-۱ in the structure of lignin sulfonate showed theprogress of the acetylation reaction well. Also, due to the use of choline chloride (catalyst), due to itscompatibility with the environment, it can make this acetylation method more prominent.

کلیدواژه ها:

Modification ، Biopolymer ، Lignin sulfonate ، Acetylation ، The environment