Lignin, which is the most abundant aromatic polymer in nature, was used as a green substitute for the toxic bisphenol A. In particular, the ability of epoxidized lignin to simultaneously serve as a cross-linker and rigid segment was investigated. The epoxidized lignin was preferably reacted with a monofunctional amine, which acted as a chain extender, to evaluate its performance as a cross-linker, and in the presence of poly(ethylene glycol) diglycidyl ether as a soft segment to adjust the resin properties. Different poly(ethylene glycol) diglycidyl ether/lignin stoichiometric ratios were tested, whereas the amine/epoxy equivalent ratio was fixed at 1:2. Some of the remarkable resin samples were subjected to differential scanning calorimetry analysis and compared with blank samples that did not include lignin in the composition. Moreover, the evolution over time of the molecular weight distribution of the selected compositions was analyzed by gel permeation chromatography until the solubility in tetrahydrofuran was appreciable.

Salanti, A., Zoia, L., Simonutti, R., Orlandi, M. (2018). Epoxidized lignin derivatives as bio-based crosslinkers used in the preparation of epoxy resins. BIORESOURCES, 13(2), 2374-2396 [10.15376/biores.13.2.2374-2396].

Epoxidized lignin derivatives as bio-based crosslinkers used in the preparation of epoxy resins

Salanti, Anika;Zoia, Luca
;
Simonutti, Roberto;Orlandi, Marco
2018

Abstract

Lignin, which is the most abundant aromatic polymer in nature, was used as a green substitute for the toxic bisphenol A. In particular, the ability of epoxidized lignin to simultaneously serve as a cross-linker and rigid segment was investigated. The epoxidized lignin was preferably reacted with a monofunctional amine, which acted as a chain extender, to evaluate its performance as a cross-linker, and in the presence of poly(ethylene glycol) diglycidyl ether as a soft segment to adjust the resin properties. Different poly(ethylene glycol) diglycidyl ether/lignin stoichiometric ratios were tested, whereas the amine/epoxy equivalent ratio was fixed at 1:2. Some of the remarkable resin samples were subjected to differential scanning calorimetry analysis and compared with blank samples that did not include lignin in the composition. Moreover, the evolution over time of the molecular weight distribution of the selected compositions was analyzed by gel permeation chromatography until the solubility in tetrahydrofuran was appreciable.
Articolo in rivista - Articolo scientifico
Cross-linker; Differential scanning calorimetry (DSC); Epoxy resin; Gel permeation chromatography (GPC); Lignin;
Cross-linker; Differential scanning calorimetry (DSC); Epoxy resin; Gel permeation chromatography (GPC); Lignin; Environmental Engineering; Bioengineering; Waste Management and Disposal
English
8-feb-2018
2018
13
2
2374
2396
none
Salanti, A., Zoia, L., Simonutti, R., Orlandi, M. (2018). Epoxidized lignin derivatives as bio-based crosslinkers used in the preparation of epoxy resins. BIORESOURCES, 13(2), 2374-2396 [10.15376/biores.13.2.2374-2396].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/196609
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