Titre :

Hydrotropic extraction of carnosic acid from rosemary with short-chain alkyl polyethylene glycol ethers

Auteur(s) :

Mazaud, Agathe [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lebeuf, Raphael [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Laguerre, Mickael [Auteur]
Naturex SA [Avignon]
Nardello-Rataj, Véronique [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Titre de la revue :

ACS Sustainable Chemistry & Engineering

Nom court de la revue :

ACS Sustain. Chem. Eng.

Numéro :

8

Pagination :

15268-15277

Date de publication :

2020-10-12

ISSN :

2168-0485

Mot(s)-clé(s) :

rosemary
antioxidant
cloud point
alkyl polyethylene glycol ether
hydrotropic extraction
carnosic acid

Discipline(s) HAL :

Chimie/Chimie organique

Résumé en anglais : [en]

Carnosic acid (CA) is a hydrophobic secondary metabolite and the main antioxidant of rosemary. Extractions of CA from whole leaves of rosemary have been performed with aqueous solutions of 12 short-chain alkyl polyethylene ...
Lire la suite >Carnosic acid (CA) is a hydrophobic secondary metabolite and the main antioxidant of rosemary. Extractions of CA from whole leaves of rosemary have been performed with aqueous solutions of 12 short-chain alkyl polyethylene glycol ethers, abbreviated as CiEj with i = 4–8 and j = 1–4. Such compounds act as hydrotropes which are known to enhance the solubilization of hydrophobic molecules in water while avoiding the formation of liquid crystals like surfactants. The extractions are compared with those carried out with alcohols, sodium xylene sulfonate (SXS) which is an archetypical ionic hydrotrope, and longer CiEj (i = 10 or 12 and j = 4) which behave as true surfactants. C5E2 and C4E1 are the best candidates and provide 1.21 g/L CA in 21 h and 1.02 g/L in 8 h, respectively. They are more efficient than SXS and alcoholic aqueous solutions. Correlations between the chemical structure and activity have highlighted three requirements for better performances: (i) a small molecular volume Vm (<250 Å3), (ii) a log P above 1, and (iii) a linear alkyl chain rather than a branched one. Finally, kinetic study and optical microscopy observations of the leaves after extraction give insight into the mode of action of the C4Ej compared to ethanol.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Colloïdes catalyse oxydation (CÏSCO)

Date de dépôt :

2022-03-02T07:15:04Z
2023-12-15T20:18:16Z
2023-12-15T20:20:14Z