木质素磺酸盐
增塑剂
化学
木质素
有机化学
漆酶
磺酸盐
甲基三甲氧基硅烷
原材料
生物高聚物
化学工程
聚合物
涂层
工程类
酶
钠
作者
Dimitri Areskogh,Jiebing Li,Göran Gellerstedt,Gunnar Henriksson
出处
期刊:Biomacromolecules
[American Chemical Society]
日期:2010-02-23
卷期号:11 (4): 904-910
被引量:102
摘要
Lignosulfonates are by-products from the sulfite pulping process. During this process, lignin is liberated from pulp fibers through sulfonation and washed away. As a consequence, the lignosulfonate molecules contain both hydrophobic and hydrophilic moieties. Lignosulfonates are low-value products with limited performance and are used as such as binders, surfactants, and plasticizers in concrete. Lignosulfonates face strong competition from synthetic petroleum-based plasticizers with superior quality. Therefore, increasing the performance of lignosulfonates is desirable not only from a sustainability point of view but also to expand their usage. One important aspect that describes how well lignosulfonates can act as plasticizers is the molecular weight. In this paper, the molecular weight of four commercial lignosulfonates is increased through oxidation by two laccases without utilization of mediators. Different parameters to obtain maximal molecular weight increase were identified and the technical significance of the experiments is discussed.
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