Activation of Enzymatic Hydrolysis Lignin by NaOH/Urea Aqueous Solution for Enhancing Its Sulfomethylation Reactivity

被引：27

作者：

Zhang, Binpeng ^{[1
]}

Yang, Dongjie ^{[1
,2
]}

Wang, Huan ^{[1
]}

Qian, Yong ^{[1
]}

Huang, JinHao ^{[1
]}

Yu, Lixuan ^{[1
]}

Qiu, Xueqing ^{[1
,2
]}

机构：

[1] South China Univ Technol, Sch Chem & Chem Engn, Guangdong Prov Engn Res Ctr Green Fine Chem, 381Wushan Rd, Guangzhou 510641, Guangdong, Peoples R China

[2] South China Univ Technol, State Key Lab Pulp & Paper Engn, 381Wushan Rd, Guangzhou 510641, Guangdong, Peoples R China

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2019年 / 7卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Enzymatic hydrolysis lignin; NaOH/urea; Sulfomethylation reactivity; Activation; Dispersion performance; ALKALI LIGNIN; CALCIUM LIGNOSULFONATE; CARBOHYDRATE COMPLEX; DISPERSANT; DISSOLUTION; DEPOLYMERIZATION; PRETREATMENT; ETHANOL; FIBERS; UREA;

D O I：

10.1021/acssuschemeng.8b04781

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Enzymatic hydrolysis lignin (EHL), from straw bioethanol process, was activated using NaOH/urea aqueous solution under low temperature condition to enhance its sulfonation degree and dispersion property. The sulfonation degree of EHL increased by 62.60% after the activation of NaOH/urea aqueous solution at -10 degrees C for 12 h, which is resulted from the breakage of the hydrogen bonds and ether bonds in lignin-carbohydrate complexes (LCCs) and the removal of residual carbohydrate. The functional group 2D-HSQC, and AFM analysis indicated that the increase of phenolic groups and the weakened aggregation degree of EHL after the activation are in favor of the increase of activity sites and decrease of steric hindrance, which is beneficial to the enhancement of sulfomethylation reactivity. Owing to the enhancement of reactivity, the dispersion properties significantly enhanced. of sulfomethylated EHL on graphite suspension were

引用

页码：1120 / 1128

页数：17

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