Expanding lignin thermal property space by fractionation and covalent modification.

ABSTRACT: To fully exploit kraft lignin's potential in material applications, we need to achieve tight control over those key physicochemical lignin parameters that ultimately determine, and serve as proxy for, the properties of lignin-derived materials. Here, we show that fractionation combined with systematic (incremental) modification provides a powerful strategy to expand and controllably tailor lignin property space. In particular, the glass transition temperature (T_g) of a typical kraft lignin could be tuned over a remarkable and unprecedented 213 °C. Remarkably, for all fractions the T_g proved to be highly linearly correlated with the degree of derivatisation by allylation, offering such tight control over the T_g of the lignin and ultimate

SUBMITTER: Riddell LA 

PROVIDER: S-EPMC10389295 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature