非离子型表面活性剂对木质纤维素酶催化水解的影响及机理
Effects of Non-Ionic Surfactant on the Enzymatic Hydrolysis of Lignocellulose and Corresponding Mechanism
查看参考文献114篇
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文摘
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木质纤维素的酶解糖化过程是纤维素生物质转化中的关键步骤,也是限制纤维素生物转化生产燃料和化学品的主要瓶颈。大量的研究表明,非离子型表面活性剂能够强化木质纤维素酶解过程,显著提高纤维素的酶催化水解效率。本文综述了非离子型表面活性剂对纯纤维素和木质纤维素底物酶解的影响,分析了底物结构特性、水解条件、纤维素酶组成等诸多因素与表面活性剂作用效果之间的关联,并从纤维素酶的吸附特性、纤维素酶组分间的协同作用等方面对非离子表面活性剂的作用机理进行了总结。结合已有的研究进展和存在的问题,提出了今后表面活性剂对于木质纤维素酶催化水解影响的研究重点方向,即系统分析底物结构、水解条件等因素对表面活性剂作用的宏观影响,以及分析这种作用的热力学和动力学特性,而微观上需要从原子和分子层面上解析表面活性剂与底物和纤维素酶之间的相互作用特性。 |
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其他语种文摘
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During the bioconversion of lignocellulose,enzymatic hydrolysis of cellulose to produce glucose is a key step. However, it also has become a bottle-neck for effective bioconversion of lignocellulosic biomass to fuels or chemicals. A large amount of works have demonstrated that addition of non-ionic surfactant during enzymatic hydrolysis of pretreated lignocelluloses can effectively improve the cellulose conversion thus reducing the enzyme loading. In this paper, the effects of non-ionic surfactant on enzymatic hydrolysis of pure cellulose and pretreated lignocellulose are reviewed comprehensively. The relationships of the structural features of substrate, hydrolysis conditions and cellulase formulation with the action of surfactant are discussed. Corresponding mechanisms are analyzed in terms of the adsorption of cellulases and the synergism of the cellulase components. However,the current research progress has not clearly elucidated the mechanisms for the effects of non-ionic surfactant on cellulose hydrolysis. It is proposed that to deeply understand the mechanism, further researches should be focused on systematically investigating the relations of substrate structure,hydrolysis conditions with the actions of non-ionic surfactant to the enzymatic hydrolysis of cellulose. Microscopically, the interactive actions and forces between surfactant and substrate, surfactant and cellulase enzymes should be investigated from the atomic and molecular levels. The thermodynamic and kinetic behaviors of enzymatic hydrolysis of cellulose with addition of surfactant should also be illustrated. |
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来源
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化学进展
,2015,27(11):1555-1565 【核心库】
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DOI
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10.7536/pc150511
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关键词
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木质纤维素
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纤维素
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非离子型表面活性剂
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酶解
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纤维素酶吸附
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地址
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清华大学化学工程系应用化学研究所, 北京, 100084
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-281X |
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学科
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化学 |
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基金
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国家自然科学基金项目
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国家973计划
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国家能源局重点项目
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文献收藏号
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CSCD:5588010
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