Changes on Content, Structure and Surface Distribution of Lignin in Jute Fibers After Laccase Treatment

ABSTRACT

Effect of laccase treatment on the content, structure, and surface distribution of lignin in jute fibers were fundamentally investigated. Four percent lignin was removed from jute fibers via the laccase treatment. The residual lignin in the laccase-treated jute fibers showed increased molecular weights, which indicated polymerization between lignins on jute fibers. Meanwhile, the phenolic hydroxyl content in lignin decreased during the laccase oxidation accompanied by demethylation of methoxyl groups and generation of carbonyl groups. Due to the degradation and subsequent polymerization of lignin by laccase, the bulgy lignins on jute fiber surfaces were redistributed, which made the surface neat and glossy.

摘要

研究了漆酶处理对黄麻纤维中木质素含量、结构及表面分布的影响。经漆酶处理后，黄麻纤维中4%的木质素被去除，纤维中残余的木质素分子量增加，表明黄麻纤维上的木质素间发生了聚合。同时木质素中酚羟基含量降低，并伴随着脱甲氧基作用和羰基的生成。由于漆酶作用下木质素的降解与后续聚合，黄麻纤维表面凸出的木质素进行了重新分配，从而使表面平整、光滑。

KEYWORDS:

• Content
• distribution
• jute
• laccase
• lignin
• structure

关键词:

• 含量
• 分布
• 黄麻
• 漆酶
• 木质素
• 结构

Funding

This work was financially supported by the National Natural Science Foundations of China (51603087, 51673087), Program for Changjiang Scholars and Innovative Research Team in University (IRT_15R26), Fundamental Research Funds for the Central Universities (JUSRP51717A), Key R&D Program of Jiangsu Province (BE2016208), Portuguese Foundation for Science and Technology (UID/BIO/04469/2013 unit), and COMPETE 2020 (POCI-01-0145-FEDER-006684).

Additional information

Funding

This work was financially supported by the National Natural Science Foundations of China (51603087, 51673087), Program for Changjiang Scholars and Innovative Research Team in University (IRT_15R26), Fundamental Research Funds for the Central Universities (JUSRP51717A), Key R&D Program of Jiangsu Province (BE2016208), Portuguese Foundation for Science and Technology (UID/BIO/04469/2013 unit), and COMPETE 2020 (POCI-01-0145-FEDER-006684).