title: Polymerization reactivity of sulfomethylated alkali lignin modified with horseradish peroxidase.
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.
authors.affiliation: State 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.
authors.forename: Dongjie
authors.initials: D
authors.lastname: Yang
authors.affiliation: State 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.
authors.forename: Xiaolei
authors.initials: X
authors.lastname: Wu
authors.affiliation: State 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. Electronic address: xueqingqiu66@163.com.
authors.forename: Xueqing
authors.initials: X
authors.lastname: Qiu
authors.affiliation: State 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.
authors.forename: Yaqi
authors.initials: Y
authors.lastname: Chang
authors.affiliation: State 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.
authors.forename: Hongming
authors.initials: H
authors.lastname: Lou
mesh_terms: D000327:Adsorption; D000468:Alkalies / Q000378:metabolism; D002849:Chromatography, Gas; D006735:Horseradish Peroxidase / Q000378:metabolism*; D008031:Lignin / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D058105:Polymerization
chemical_list: D000468:Alkalies; D008031:Lignin; D006735:Horseradish Peroxidase
keywords: Horseradish peroxidase; Polymerization; Reactivity; Sulfomethylated alkali lignin