A simple approach for the fractionation of industrial softwood kraft lignin is presented in this work aimed at predictively obtaining readily usable lignin fractions with tailored material properties in a straightforward manner. This method is based on the use of three distinct solvents of different chemical nature to isolate soluble and insoluble fractions from the parent lignin by a single-step extraction process. A thorough characterization of the soluble and insoluble lignin fractions highlighted a direct correlation between the chemical-physical characteristics of the extraction solvent and the final properties of the recovered materials. In particular, hydrogen bonding interactions between solvent and lignin were demonstrated to play a major role in the extraction process, controlling to a great extent the final materials properties. The results of this study give a clear demonstration of a straightforward approach to access easily lignin fractions with well-defined characteristics and provide strong evidence of the direct correlation between solvent characteristics and properties of the extracted materials as predictive tool for the development of high-performance lignin-based systems. (Figure Presented).

Fractionation of Industrial Softwood Kraft Lignin: Solvent Selection as a Tool for Tailored Material Properties

LEVI, MARINELLA;TURRI, STEFANO;GRIFFINI, GIANMARCO ENRICO
2016-01-01

Abstract

A simple approach for the fractionation of industrial softwood kraft lignin is presented in this work aimed at predictively obtaining readily usable lignin fractions with tailored material properties in a straightforward manner. This method is based on the use of three distinct solvents of different chemical nature to isolate soluble and insoluble fractions from the parent lignin by a single-step extraction process. A thorough characterization of the soluble and insoluble lignin fractions highlighted a direct correlation between the chemical-physical characteristics of the extraction solvent and the final properties of the recovered materials. In particular, hydrogen bonding interactions between solvent and lignin were demonstrated to play a major role in the extraction process, controlling to a great extent the final materials properties. The results of this study give a clear demonstration of a straightforward approach to access easily lignin fractions with well-defined characteristics and provide strong evidence of the direct correlation between solvent characteristics and properties of the extracted materials as predictive tool for the development of high-performance lignin-based systems. (Figure Presented).
2016
Biobased; Fractionation; Lignin; Polymer; Thermal properties; Chemistry (all); Environmental Chemistry; Chemical Engineering (all); Renewable Energy, Sustainability and the Environment
File in questo prodotto:
File Dimensione Formato  
Lignin fractionation_Passoni_Griffini et al_2016.pdf

Accesso riservato

Descrizione: ACSSustChemEng_2016
: Publisher’s version
Dimensione 2.42 MB
Formato Adobe PDF
2.42 MB Adobe PDF   Visualizza/Apri
11311-1000857 Levi.pdf

accesso aperto

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 2.76 MB
Formato Adobe PDF
2.76 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1000857
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 127
  • ???jsp.display-item.citation.isi??? 116
social impact