Effect of Lignin Structure on Bleaching Performance and Brightness of Wheat Straw CMP

摘要

Chromphoric groups and auxchromic groups in lignin structure are determined for wheat straw CMP before and after bleaching with hydrogen peroxide. The chromphoric groups and auxochromic groups in lignin structure in common are phenol hydroxyl, carbonyl and quinone groups. The results indicated that the lignin of wheat straw CMP was highly resistance to H_2O_2, leading to poor bleaching perfonnance. Measures taken to have the lignin activated and the permeability of H_2O_2 improved will help to promote the bleaching results.