溶解纤维素的过程是将其转化为功能性的关键步骤,增值材料,有必要彻底理解基础机制,以完善其先进的处理。本文综述了使用各种溶剂系统溶解纤维素,以及对相关溶解机制的深入探索。不同溶剂的功效,包括水性溶剂,有机溶剂,离子液体,混合离子液体/共溶剂系统,和低共熔溶剂,在溶解纤维素时,并强调了它们的局限性和优势。此外,这篇综述有条不紊地概述了这些不同溶剂体系中的作用机制以及影响纤维素溶解度的因素。得出的结论强调了聚合度的整体作用,结晶度颗粒大小,阳离子和阴离子的类型和大小,烷基链长,离子液体/共溶剂比,粘度,溶剂酸度,碱度,和溶解过程中的疏水相互作用。这篇全面的综述旨在为研究人员在更广泛的背景下研究生物聚合物溶解提供有价值的见解。从而为这些溶剂体系的更广泛的应用和创新铺平了道路。
The process of dissolving cellulose is a pivotal step in transforming it into functional, value-added materials, necessitating a thorough comprehension of the underlying mechanisms to refine its advanced processing. This article reviews cellulose dissolution using various solvent systems, along with an in-depth exploration of the associated dissolution mechanisms. The efficacy of different solvents, including aqueous solvents, organic solvents, ionic liquids, hybrid ionic liquid/cosolvent systems, and deep eutectic solvents, in dissolving cellulose is scrutinized, and their limitations and advantages are highlighted. In addition, this review methodically outlines the mechanisms at play within these various solvent systems and the factors influencing cellulose solubility. Conclusions drawn highlight the integral roles of the degree of polymerization, crystallinity, particle size, the type and sizes of cations and anions, alkyl chain length, ionic liquid/cosolvent ratio, viscosity, solvent acidity, basicity, and hydrophobic interactions in the dissolution process. This comprehensive review aims to provide valuable insights for researchers investigating biopolymer dissolution in a broader context, thereby paving the way for broader applications and innovations of these solvent systems.