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Solvent-free fatty acylation of cellulose and lignocellulosic wastes. Part 2: reactions with fatty acids1The first paper of this series is: Thiebaud, S., Borredon, M.E., 1995. Solvent-free wood esterification with fatty acid chlorides. Bioresour. Technol., 52, 169–173.1

Vaca-Garcia, Carlos and Borredon, Marie-Elisabeth Solvent-free fatty acylation of cellulose and lignocellulosic wastes. Part 2: reactions with fatty acids1The first paper of this series is: Thiebaud, S., Borredon, M.E., 1995. Solvent-free wood esterification with fatty acid chlorides. Bioresour. Technol., 52, 169–173.1. (1999) Bioresource Technology, 70 (2). 135-142. ISSN 0960-8524

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Official URL: https://doi.org/10.1016/S0960-8524(99)00034-6

Abstract

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.

Item Type:Article
HAL Id:hal-02079794
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
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Deposited By: Yves MOMBOISSE
Deposited On:26 Mar 2019 10:51

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