Journal
HOLZFORSCHUNG
Volume 70, Issue 1, Pages 11-20Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/hf-2014-0346
Keywords
fractionation; Hansen solubility parameters; kraft lignin; solubility; solvent
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Funding
- Knut and Alice Wallenberg Foundation
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The polydispersity of commercially available kraft lignins (KLs) is one of the factors limiting their applications in polymer-based materials. A prerequisite is thus to develop lignin fractionation strategies compatible with industrial requirements and restrictions. For this purpose, a solvent-based lignin fractionation technique has been addressed. The partial solubility of KL in common industrial solvents compliant with the requirements of sustainable chemistry was studied, and the results were discussed in relation to Hansen solubility parameters. Based on this screening, a solvent sequence is proposed, which is able to separate well-defined KL fractions with low polydispersity.
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