OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Cellulose esterification with fatty acids and acetic anhydride in lithium chloride/N,N -dimethylacetamide medium

Vaca-Garcia, Carlos and Thiebaud-Roux, Sophie and Borredon, Marie-Elisabeth and Gozzelino, Giuseppe Cellulose esterification with fatty acids and acetic anhydride in lithium chloride/N,N -dimethylacetamide medium. (1998) Journal of the American Oil Chemists' Society, 75 (2). 315-319. ISSN 0003-021X

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
579kB

Official URL: https://doi.org/10.1007/s11746-998-0047-2

Abstract

Homogeneous esterification of cellulose with saturated fatty acids (n‐octanoic to n‐octadecanoic) was accomplished with acetic anhydride co‐reactant in lithium chloride/N,N‐dimethylacetamide (LiCl/DMAc) medium. Cellulose mixed triesters (CMT) were obtained after 5 h at 130°C with an average of 2.2 acetyl groups and 0.8 fatty substituents per anhydroglucose unit. A mixed acetic‐fatty anhydride, formed in situ, accounts for the grafting of the fatty moiety. The purified products were characterized and compared to the analogous cellulose simple fatty triesters (CST) that were synthesized from fatty acid chlorides in pyridine medium. Dynamic contact angle with water, glass transition, and storage moduli were correlated with the length of the fatty substituents. The CMT proved to be highly hydrophobic and more mechanically resistant than the CST.

Item Type:Article
HAL Id:hal-02073810
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)
Other partners > Politecnico di Torino (ITALY)
Laboratory name:
Statistics:download
Deposited By: Yves MOMBOISSE
Deposited On:20 Mar 2019 10:28

Repository Staff Only: item control page