Towards a molecular understanding of cellulose dissolution in ionic liquids: anion/cation effect, synergistic mechanism and physicochemical aspects.
Towards a molecular understanding of cellulose dissolution in ionic liquids: anion/cation effect, synergistic mechanism and physicochemical aspects.
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从分子角度理解纤维素在离子液体中的溶解：阴离子/阳离子效应、协同机制和物理化学方面
DOI：
10.1039/c7sc05392d
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发表时间：
2018-05-07
期刊：
影响因子：
8.4
通讯作者：
Zhang S
中科院分区：
文献类型：
--
作者：
Li Y;Wang J;Liu X;Zhang S
本文综述了纤维素在离子液体中溶解的机理研究，重点介绍了纤维素在离子液体中的协同作用机理、理化方面以及未来的研究趋势。纤维素是地球上最丰富的生物可再生材料之一，将其转化为生物燃料为满足日益增长的全球能源需求提供了一条有吸引力的途径。然而，在进行酶解葡萄糖或多糖的过程之前，需要对纤维素进行预处理以克服其顽固性。近年来，多种离子液体被发现是纤维素的有效溶剂，提供了一种新的、可行的预处理策略。为了探究其溶解机理，人们进行了大量的实验和计算研究。然而，许多细节尚未完全了解，这突出了概述纤维素溶解的现有知识和确定未来研究趋势的必要性。这一观点总结了纤维素溶解的机理研究和微观见解。综述了近年来阳离子/阴离子协同作用的研究进展以及纤维素微纤维在人工纤维中的独特结构变化。此外，从结构和物理化学的角度探讨了控制溶解过程的因素，如阴离子/阳离子的结构、il的粘度、预处理温度、加热速率等。最后，对存在的问题进行了讨论，并对未来的发展进行了展望。希望本文的研究能对进一步了解纤维素在纤维素纤维中的溶解过程，合理设计更高效、可循环利用的纤维素纤维有所帮助。
This perspective summarizes mechanistic studies on cellulose dissolution in ionic liquids, highlighting the synergistic mechanism, physicochemical aspects and future research trends. Cellulose is one of the most abundant bio-renewable materials on the earth and its conversion to biofuels provides an appealing way to satisfy the increasing global energy demand. However, before carrying out the process of enzymolysis to glucose or polysaccharides, cellulose needs to be pretreated to overcome its recalcitrance. In recent years, a variety of ionic liquids (ILs) have been found to be effective solvents for cellulose, providing a new, feasible pretreatment strategy. A lot of experimental and computational studies have been carried out to investigate the dissolution mechanism. However, many details are not fully understood, which highlights the necessity to overview the current knowledge of cellulose dissolution and identify the research trend in the future. This perspective summarizes the mechanistic studies and microscopic insights of cellulose dissolution in ILs. Recent investigations of the synergistic effect of cations/anions and the distinctive structural changes of cellulose microfibril in ILs are also reviewed. Besides, understanding the factors controlling the dissolution process, such as the structure of anions/cations, viscosity of ILs, pretreatment temperature, heating rate, etc., has been discussed from a structural and physicochemical viewpoint. At the end, the existing problems are discussed and future prospects are given. We hope this article would be helpful for deeper understanding of the cellulose dissolution process in ILs and the rational design of more efficient and recyclable ILs.
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影响因子：
4.9
作者：
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通讯作者：
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DOI：
10.1073/pnas.0912073107
发表时间：
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