Influence mechanism of magnesium lignosulfonates on enzymatic hydrolysis of different cellulose materials

doi:10.11949/j.issn.0438-1157.20170170

Abstract

Abstract:

In order to investigate the influence mechanism of magnesium lignosulfonates as assisted additives on enzymatic of cellulose hydrolysis, two kinds of magnesium lignosulfonates from different materials were selected to study the fabric differences and influences on enzymatic hydrolysis of different lignocellulose materials. It could be found that commercial magnesium lignosulfonate had higher sulfonation degree than homemade magnesium lignosulfonate, but ML had higher total hydroxy related content. Both commercial magnesium lignosulfonate and homemade magnesium lignosulfonate could enhance the enzymatic hydrolysis of Avicel. For enzymatic hydrolysis of lignocellulose material, two kinds of lignosulfonates showed inhibit influences on wheat straw pretreated by liquid hot water pretreatment. Only low concentration homemade magnesium lignosulfonate indicated the positive influence on wheat straw pretreated by magnesium bisulfite pretreatment. This study provided the theoretical references for explanation on influence mechanism of magnesium lignosulfonates on enzymatic hydrolysis.

Key words: magnesium lignosulfonate, cellulose, enzymatic hydrolysis, surfactants, biomass, biofuel

摘要：

为探讨木质素磺酸镁作为辅助添加剂在纤维原料酶解过程的作用机制，以两种木质素磺酸镁为研究对象，考察了不同来源木质素磺酸镁组构差异及其在不同纤维原料酶解过程中的作用。研究发现，商品木质素磺酸镁较自制木质素磺酸镁具有更高的磺化度，但自制木质素磺酸镁具有更高总羟基相对含量。商品木质素磺酸镁和自制木质素磺酸镁对微晶纤维素酶解均有促进作用；对于木质纤维原料酶解，两种木质素磺酸镁对水热法预处理物料均有抑制作用。对亚硫酸氢镁预处理物料酶解，仅低浓度的自制木质素磺酸镁表现出促进作用。该研究为解释木质素磺酸镁对纤维素原料酶解的影响机制提供了理论依据。

关键词: 木质素磺酸镁, 纤维素, 酶解, 表面活性剂, 生物质, 生物乙醇

CLC Number:

TQ353.6

REN Jiwei, LIU Lei, QIAN Zijun, ZHANG Yitong, OUYANG Jia. Influence mechanism of magnesium lignosulfonates on enzymatic hydrolysis of different cellulose materials[J]. CIESC Journal, 2017, 68(8): 3275-3281.

任继巍, 刘蕾, 钱子俊, 张一瞳, 欧阳嘉. 木质素磺酸镁对不同纤维素原料酶解的影响机制[J]. 化工学报, 2017, 68(8): 3275-3281.

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