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Updated: May 3, 2026

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
Published on: November 30, 2020
Polymerization reactivity of sulfomethylated alkali lignin modified with horseradish peroxidase
Dongjie Yang1, Xiaolei Wu1, Xueqing Qiu1
1State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China; School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China.
Abstract:
Alkali lignin (AL) was employed as raw materials in the present study. Sulfomethylation was conducted to improve the solubility of AL, while sulfomethylated alkali lignin (SAL) was further polymerized by horseradish peroxidase (HRP). HRP modification caused a significant increase in molecular weight of SAL which was over 20 times. It was also found to increase the amount of sulfonic and carboxyl groups while decrease the amount of phenolic and methoxyl groups in SAL. The adsorption quantity of self-assembled SAL film was improved after HRP modification. Sulfonation and HRP modification were mutually promoted. The polymerization reactivity of SAL in HRP modification was increased with its sulfonation degree. Meanwhile, HRP modification facilitated SAL's radical-sulfonation reaction.
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