title: Preparation of sulfoacetate derivatives of cellulose by direct esterification.
abstract: A new and efficient method for the preparation in one step of water-soluble cellulose acetate sulfate derivatives (CAS) is reported. Acetylation and sulfation were carried out simultaneously, using a mixture of acetic anhydride and sulfuric acid in glacial acetic acid. The reaction time and the amount of acetic anhydride were optimized and the method provided water-soluble esters, with a degree of acetylation in the range 1.6 and 2.4 and a degree of sulfation of 0.3. This method has been successfully applied to pure cellulose and to cellulose-enriched materials obtained from agricultural by-products. The product exhibited a high viscosity in aqueous solution suggesting interesting rheological properties.
authors.affiliation: INRA Centre de Recherche Agro-Alimentaire, BP 71627, 44316 Nantes Cedex 03, France.
authors.forename: Gaëlle
authors.initials: G
authors.lastname: Chauvelon
authors.forename: Alain
authors.initials: A
authors.lastname: Buléon
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Thibault
authors.forename: Luc
authors.initials: L
authors.lastname: Saulnier
mesh_terms: D000085:Acetates / Q000737:chemistry*; D000089:Acetic Anhydrides / Q000737:chemistry; D000107:Acetylation; D002482:Cellulose / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry; D004951:Esterification; D007700:Kinetics; D012995:Solubility; D013431:Sulfates / Q000737:chemistry*; D014783:Viscosity
chemical_list: D000085:Acetates; D000089:Acetic Anhydrides; D013431:Sulfates; D002482:Cellulose