Deep eutectic solvents as sustainable extraction media for extraction of polysaccharides from natural sources: Status, challenges and prospects

• Published in: Carbohydrate polymers 2024-08, Vol.338, p.122199-122199, Article 122199
• Main Authors: Yahaya, Noorfatimah, Mohamed, Ahmad Husaini, Sajid, Muhammad, Zain, Nur Nadhirah Mohamad, Liao, Pao-Chi, Chew, Kit Wayne
• Format: Article
• Language: English
• Subjects: Animals; Biological Products - chemistry; Biological Products - isolation & purification; Chemical Fractionation - methods; Deep eutectic solvent; Deep Eutectic Solvents - chemistry; Extraction; Plants - chemistry; Polysaccharides; Polysaccharides - chemistry; Polysaccharides - isolation & purification; Solvents - chemistry; Sustainable extraction media
• ISSN: 0144-8617; 1879-1344
• DOI: 10.1016/j.carbpol.2024.122199

Deep eutectic solvents (DES) emerge as promising alternatives to conventional solvents, offering outstanding extraction capabilities, low toxicity, eco-friendliness, straightforward synthesis procedures, broad applicability, and impressive recyclability. DES are synthesized by combining two or more components through various synthesis procedures, such as heat-assisted mixing/stirring, grinding, freeze drying, and evaporation. Polysaccharides, as abundant natural materials, are highly valued for their biocompatibility, biodegradability, and sustainability. These versatile biopolymers can be derived from various natural sources such as plants, algae, animals, or microorganisms using diverse extraction techniques. This review explores the synthesis procedures of DES, their physicochemical properties, characterization analysis, and their application in polysaccharide extraction. The extraction optimization strategies, parameters affecting DES-based polysaccharide extraction, and separation mechanisms are comprehensively discussed. Additionally, this review provides insights into recently developed molecular guides for DES screening and the utilization of artificial neural networks for optimizing DES-based extraction processes. DES serve as excellent extraction media for polysaccharides from different sources, preserving their functional features. They are utilized both as extraction solvents and as supporting media to enhance the extraction abilities of other solvents. Continued research aims to improve DES-based extraction methods and achieve selective, energy-efficient processes to meet the demands of this expanding field. [Display omitted] •DES are well-suited as green solvents, replacing traditional solvents.•The physicochemical properties of DES influence extraction efficiency.•Overview of DES-assisted/enhanced extraction methods.•Optimization strategy and factors affecting the performance of DES are discussed.