Study on Chemical Structure Characteristics of Wheat Straw Lignin from Enzymatic Hydrolysis-mild Acidolysis

The enzymatic hydrolysis-mild acidolysis lignin (EAL) of wheat straw was isolated through a novel lignin preparation procedure,which has good presentation of the native lignin in fibre wall.Contents of functional groups and arylglycerol-β-arylether bonds,linkage types and dibenzodioxocins(DBDO) structures of EAL were studied intensively through elementary analysis,quantitative ~(31)P NMR and method of derivatization followed by reductive cleavage(DFRC).