Structure and Reactivity of Wheat Straw Lignin

G.H. Delmas, B. Benjelloun-Mlayah, Y. Le Bigot & M. Delmas
Wheat straw lignin extracted by the CIMV process using organic acid media was analysed by Steric Exclusion Chromatography (SEC), 13C NMR spectroscopy, infrared ATR and Gas Chromatography (GC) to clarify the structure and reactivity of lignin. Lignin was esterified before analysis. The control of the esterification of lignin was conducted via infrared ATR (FTIR-ATR). The total hydroxyl functions in lignin were determined via preliminary saponification of propionylated lignin and measured via GC system. Phenolic groups...