Biomass Valorization Using Natural Deep Eutectic Solvents: What’s New in France?

Abstract

With the growing interest in more environmentally friendly solvents and processes, the introduction of Natural Deep Eutectic Solvents (NaDES) as low cost, non-toxic and biodegradable solvents represent a new opportunity for green and sustainable chemistry. Thanks to their remarkable advantages, NaDES are now arousing growing interest in many fields of research such as food, health, cosmetics and biofuels. Around the world, NaDES are seen as a promising alternative to commonly used petrochemical solvents. The objective of this review is to draw up a panorama of the existing skills on NaDES in French laboratories and industries for the valuation of natural products. This review therefore focuses on current applications, skills and perspectives, in order to analyze the place of French research in the use of NaDES for the valorization of biomass since 2015.

Glycerol-based NaDES as green solvents for ultrasound-assisted extraction of phycocyanin from Arthrospira platensis—RSM optimization and ANN modelling

“…They are defined as organic compounds with a melting point which is considerably lower than that of each component [25,26]. NaDES are obtained by mixing hydrogen bond-donors with a hydrogenbond acceptor using a suitable molar ratio [26][27][28], based on natural compounds. They are mostly composed by primary metabolites, such as organic acids, amino acids, and sugars.…”

Alternative Solvents for the Biorefinery of Spirulina: Impact of Pretreatment on Free Fatty Acids with High Added Value

“…Their association forms a network of hydrogen bonds resulting in the lowering of the melting point of the solid mixtures [ 18 , 19 ]. Hydrophobic DES have recently emerged in the literature [ 20 , 21 , 22 ]. Those NaDES are composed of a combination of menthol or thymol with sugars, polyols or fatty acids or a combination of short chain fatty acids [ 21 , 22 , 23 ].…”

Monitoring the water content in NADES extracts from spirulina biomass by means of ATR-IR spectroscopy

“…18,19 Their high solubilisation power and their high extraction ability for some natural products make them promising media for green processing. 5,20–22 NADESs have been studied as solvents for solid/liquid (S/L) extraction of polyphenols and flavonoid compounds from plants, 3,5,23 or extraction of lipids and pigments from microalgae. 24,25 Moreover, the stabilizing ability of NADESs suggests them as perfect media for sustainable valorisation of vegetal biomasses.…”

“…Hence, they are valuable environmental friendly alternatives in extraction processes to organics solvents, which are increasingly challenged by greener methods. 23…”

“…E-mail: franck.bonnier@ univ-tours.fr processes to organics solvents, which are increasingly challenged by greener methods. 23 Water can be added in certain ratios to tailor NADES properties, commonly between 5% w/w and 30% w/w, according to the desired application. 1,26 Water affects physicochemical properties such as viscosity, polarity, and density of NADESs, 27 and it strongly affects the extraction yield.…”