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Interactions with water of mixed acetic-fatty cellulose esters

Peydecastaing, Jérôme and Vaca-Garcia, Carlos and Borredon, Marie-Elisabeth Interactions with water of mixed acetic-fatty cellulose esters. (2011) Cellulose, 18 (4). 1023-1031. ISSN 0969-0239

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Official URL: http://doi.org/10.1007/s10570-011-9530-2


Cellulose powder was acylated with mixtures containing acetic, fatty and acetic-fatty anhydrides to form acetic-fatty cellulose esters. The total degree of substitution (DS) of the mixed cellulose esters (MCE) ranged from 2x10-2 to 2.92. MCE were characterized by their interactions with water. Static contact angles with water were measured on a regular smooth surface. The values found were dependent on the fatty acyl content and independent of the acetyl content. In the case of acetic-oleic cellulose esters, the minimum DS of the oleoyl moiety required to obtain permanent water repellency was 3x10-4. The microporosity of the samples may account for this exceptional hydrophobic character. Nevertheless, water vapor adsorption measurements on powder samples revealed only a limited increase in hydrophobicity of the MCE compared to cellulose acetate with the same acetyl content. It was thus demonstrated that water repellency and vapor water adsorption are not correlated.

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at http://www.springerlink.com/content/c861615u7430111n/
HAL Id:hal-02080031
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Laboratory name:
Laboratoire de Chimie Agro-Industrielle - LCA (Toulouse, France) - Lipochimie - Réactivité Chimique des Agromolécules
Deposited On:15 Sep 2011 08:27

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