Solvent-free fatty acylation of cellulose and lignocellulosic wastes. Part 2: reactions with fatty acids - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Bioresource Technology Année : 1999

Solvent-free fatty acylation of cellulose and lignocellulosic wastes. Part 2: reactions with fatty acids

Résumé

The mixed acylation of cellulose with fatty acids and acetic anhydride was accomplished in an excess of fatty acid, thus avoiding the addition of a toxic solvent. The experimental design enabled the parameters of a model reaction with octanoic acid to be optimized. The products contained both acetyl and octanoyl acyl groups in a 2.4/1 ratio and the maximum degree of substitution (DS) was 2.2. The use of fatty acids higher than C8 resulted in a decrease of the DS. The model reaction was applied to the esterification of four lignocellulosic wastes (LW). Their reactivity was comparable to that of cellulose when no pretreatment was used. A solvent-exchange pretreatment improved the acylation of LW by about 60%, whereas that of cellulose was increased by more than 400%. The hydrophobic character of the esterified products was confirmed.
Fichier principal
Vignette du fichier
Vaca-Garcia_23240.pdf (218.48 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02079794 , version 1 (26-03-2019)

Identifiants

Citer

Carlos Vaca-Garcia, Marie-Elisabeth Borredon. Solvent-free fatty acylation of cellulose and lignocellulosic wastes. Part 2: reactions with fatty acids. Bioresource Technology, 1999, 70 (2), pp.135-142. ⟨10.1016/S0960-8524(99)00034-6⟩. ⟨hal-02079794⟩
51 Consultations
219 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More