低共熔溶剂体系下木质纤维素的功能化改性及应用研究进展

Research advances on functional modification of lignocellulose under deep eutectic solvents and their applications

低共熔溶剂(DES)作为一种新型绿色溶剂,相比离子液体等其它溶剂,其具有制备简单、配制灵活、成本低、效率高等特点,在木质纤维素绿色加工领域有着广泛的应用前景。近年来,基于DES体系下木质纤维素的溶解、组分分离、衍生化改性等研究取得了一系列重要的进展,相比于在传统离子液体或有机溶剂体系,在DES体系下木质纤维素的化学改性更绿色环保,经过改性的木质纤维素在纳米纤维的制备、复合材料的构建等领域得到了广泛的应用。本文综述了在DES体系下木质纤维素的阳离子化、酯化及其它衍生化等功能化改性及DES体系下改性的木质纤维素在纳米分散、复合材料等功能化应用方面的研究进展。最后总结并展望了在DES体系下木质纤维素功能化改性及应用所面临的机遇和挑战。

Different from ionic liquids or other solvents, deep eutectic solvent(DES), as a novel environmentally friendly solvent, owns the advantages of easy and flexible preparation, low cost and high efficiency, and shows great potential applications in the pretreatment of lignocellulose. A series of important advances have been made related to the dissolution, component separation and modification of lignocellulose in DES system in recent years. The chemical modification with smaller impact on the environment can be achieved in DES system when compared to traditional ionic liquid and other organic solvent systems. Moreover, the modified lignocellulose has been widely applied in the preparation of nanofibers and the construction of composite materials. This article reviews the research advances in the cationization, esterification and other derivatizations of lignocellulose in the DES system.The applications of thus pretreated and modified lignocellulose in nano-dispersion, functional compositing are also included. Finally, the development and challenges of lignocellulose modification based on DES system are discussed.