OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Interactions with water of mixed acetic-fatty cellulose esters

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

[img] (Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
584kB

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

Abstract

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/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
French research institutions > Institut National de la Recherche Agronomique - INRA
Laboratory name:
Laboratoire de Chimie Agro-Industrielle - LCA (Toulouse, France) - Lipochimie - Réactivité Chimique des Agromolécules
Statistics:download
Deposited By: Isabelle ALRIC
Deposited On:15 Sep 2011 08:27

Repository Staff Only: item control page