Scrutiny of the supramolecular structure of bio-sourced fructose/glycerol/water ternary mixtures: Towards green low transition temperature mixtures

Caprin, Benoit; Charton, Virginie; Rodier, Jean-David; Vogelgesang, Boris; Charlot, Aurélia; Cruz-Boisson, Fernande Da; Fleury, Étienne

doi:10.1016/j.molliq.2021.116428

Cited by 10 publications

(17 citation statements)

References 42 publications

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“…Deionized water (18 MΩ•cm) obtained from a Veolia Aquadem system was used as the third component to obtain the FGW LTTM according to the recently described method. 10 κ-Carrageenan was provided by Roth and was used without any further purification. Its water uptake (≈7 wt %) and thermal decomposition temperature (≈250 °C) were measured by thermogravimetric analysis (Figure S1).…”

Section: Methodsmentioning

confidence: 99%

“…Indeed, we recently reported by means of DSC, rheology, and NMR spectroscopy that FGW in 1:1:5 molar ratio (subsequently named FGW) behaves as a cooperatively Hbonded supramolecular structure leading to a stable solvent identified as LTTM exhibiting a unique and low T g and an outstanding microbiological stability. 10 Moreover, this composition was industrially implemented to efficiently extract bioactive substances from plants for cosmetic applications. 11 Due to its appealing advantages in terms of structuration, polarity, and ability to develop synergetic interactions between its compounds, we pursue as a statement of hypothesis that FGW constitutes a well-suited solvent to generate, when mixed with κ-carrageenan, soft materials with improved thermoreversible properties and reinforced mechanical behavior, compared to water-based systems.…”

Section: Introductionmentioning

confidence: 99%

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κ-Carrageenan Associated with Fructose/Glycerol/Water LTTM: Toward Natural Thermosensitive Physical Gels

Caprin

Viñado-Buil

Sudre

et al. 2022

ACS Sustainable Chem. Eng.

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κ-Carrageenan was combined to a natural low-transition temperature mixture composed of fructose, glycerol, and water in a 1:1:5 molar ratio (FGW) to generate fully biobased physical gels through a simple method. The resulting gels can be easily prepared in various shapes. As for their hydrogel analogues, the rheological characterization of FGW-based samples evidenced thermosensitive gelation, attributed to the formation of aggregated H-bonded helices composed of κ-carrageenan chains. FGW-based gels exhibit a gel–sol transition temperature (T g/s) higher than the one of hydrogels with recoverable and reversible viscoelastic properties upon successive heating/cooling cycles. SAXS analysis revealed a more extended conformation of chains in FGW that leads to more physical cross-linking junction zones within the materials. Such peculiar spatial internal organization provides a mechanical reinforcement demonstrated by compression tests. In conclusion, the use of the FGW solvent allows for designing κ-carrageenan physical gels with enhanced thermal and mechanical properties.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

κ-Carrageenan Associated with Fructose/Glycerol/Water LTTM: Toward Natural Thermosensitive Physical Gels

Caprin

Viñado-Buil

Sudre

et al. 2022

ACS Sustainable Chem. Eng.

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“…The density will directly impact the viscosity of NaDES, which is a key parameter for transfer operations and extractive capacities [7,32]. Thus, several strategies have been described for lowering the viscosity of NaDES in order to improve their extractive performance and facilitate their use, in particular at the industrial level.…”

Section: Impact Of Nades Physical Properties On Biomass Valorizationmentioning

confidence: 99%

“…The addition of a small proportion of water (less than 20%) is a strategy conventionally described for reducing viscosity and improving performance [15,29]. The second most common strategy consists in carrying out all the extraction and transfer operations while maintaining a high temperature, generally between 50 and 70 • C [7,32].…”

Section: Impact Of Nades Physical Properties On Biomass Valorizationmentioning

confidence: 99%

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

2021

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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.

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Chemical profiling of botanical extracts obtained in NADES systems using centrifugal partition chromatography combined with ¹³C NMR dereplication—Hypericum perforatum as a case study

Kotland,

Thiery,

Hubert

2023

Phytochemical Analysis

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IntroductionNatural deep eutectic solvents (NADES) have emerged as interesting extractants to develop botanical ingredients. They are nontoxic and biodegradable, nonflammable, easy to prepare, and able to solubilize a wide range of molecules. However, NADES extracts remain difficult to analyze because the metabolites of interest stay highly diluted in the nonvolatile viscous NADES matrix.ObjectiveThis study presents a robust analytical workflow for the chemical profiling of NADES extracts. It is applied to Hypericum perforatum aerial parts extracted with the neutral mixture fructose/glycerol/water (3/1/1, w/w/w), and compared to the chemical profiling of a classical dry methanol extract.MethodsExploiting polarity differences between metabolites, the H. perforatum NADES extract was partitioned in a liquid–liquid solvent system to trap the hydrophilic NADES constituents in the lower phase. The upper phase, containing a diversity of secondary metabolites from H. perforatum, was fractionated by centrifugal partition chromatography. All fractions were chemically investigated using a 13C NMR dereplication method which involves hierarchical clustering analysis of the whole NMR dataset, a natural metabolite database for metabolite identification, and 2D NMR analyses for validation. Liquid chromatography–mass spectrometry (LC‐MS) analyses were also performed to complete the identification process.ResultsA range of 21 metabolites were unambiguously identified, including glycosylated flavonols, lactones, catechins, phenolic acids, lipids, and simple sugars, and 15 additional minor extract constituents were annotated by LC‐MS based on exact mass measurements.ConclusionThe proposed identification process is rapid and nondestructive and provides good prospects to deeply characterize botanical extracts obtained in nonvolatile and viscous NADES systems.

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Scrutiny of the supramolecular structure of bio-sourced fructose/glycerol/water ternary mixtures: Towards green low transition temperature mixtures

Cited by 10 publications

References 42 publications

κ-Carrageenan Associated with Fructose/Glycerol/Water LTTM: Toward Natural Thermosensitive Physical Gels

κ-Carrageenan Associated with Fructose/Glycerol/Water LTTM: Toward Natural Thermosensitive Physical Gels

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

Chemical profiling of botanical extracts obtained in NADES systems using centrifugal partition chromatography combined with ¹³C NMR dereplication—Hypericum perforatum as a case study

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Scrutiny of the supramolecular structure of bio-sourced fructose/glycerol/water ternary mixtures: Towards green low transition temperature mixtures

Cited by 10 publications

References 42 publications

κ-Carrageenan Associated with Fructose/Glycerol/Water LTTM: Toward Natural Thermosensitive Physical Gels

κ-Carrageenan Associated with Fructose/Glycerol/Water LTTM: Toward Natural Thermosensitive Physical Gels

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

Chemical profiling of botanical extracts obtained in NADES systems using centrifugal partition chromatography combined with 13C NMR dereplication—Hypericum perforatum as a case study

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Product

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Chemical profiling of botanical extracts obtained in NADES systems using centrifugal partition chromatography combined with ¹³C NMR dereplication—Hypericum perforatum as a case study