Chemical modifications of lignin for the preparation of macromers containing cyclic carbonates. Issue 14 (10th May 2016)

• Record Type: Journal Article
• Authors: Salanti, Anika; Zoia, Luca; Orlandi, Marco
• Is Part Of: Green chemistry. Volume 18:Issue 14(2016)
• Page Start: 4063
• Page End: 4072
• Publication Date: 2016-05-10
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/c6gc01028h
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : An epoxidized lignin derivative was prepared directly inserting epichlorohydrin on the phenolic functionalities and then the oxirane rings were converted to cyclic carbonate through the coupling reaction with CO2 . Abstract : An epoxidized lignin derivative was prepared directly inserting epichlorohydrin on the phenolic functionalities. The epoxidized lignin was then converted to cyclic carbonates through the coupling reaction of CO2 with the oxirane rings. Imidazolium based ionic liquids, acting as both solvents and catalysts, were successfully employed in the carbonation reaction. Moreover, the ionic liquid was reused up to three times without significant loss in activity. Finally, an exhaustive spectroscopic characterization was carried out on the epoxidized and carbonated lignins by quantitative 31 P and 13 C NMR analyses.