Work

Glass transition temperature and mechanical damping of spruce lignin plasticized with methylimidazolium-based ionic liquids

Year: 2025

Type: article

Abstract: An isolated spruce lignin was plasticized with methylimidazolium-based ionic liquids (ILs) with varying cations and anions and the glass transition temperature (T g ) and mechanical damping of the blends were determined with dynamic mechanical analysis (DMA). The T g was found to decrease for all blends. The mechanical damping, however, was found to be maintained or decreased upon plasticization, indicating a maintained or increased mechanical rigidity. Only a combination that included the sterically hindered, strongly hydrogen-bond-accepting anion acetate increased mechanical damping. • Lignin was plasticized using ionic liquids (ILs) of different cations and anions. • While the T g was lowered, a decrease in mechanical dampening was often observed. • This discrepancy may stem from strongly interacting networks of lignin and ILs. • The choice of anion had more impact on these properties than choice of cation.

Source: Industrial Crops and Products

DOI: 10.1016/j.indcrop.2025.120962

Authors: Åke Henrik-Klemens, Roujin Ghaffari, Shuichi Haraguchi, Anette Larsson

Institutions: Chalmers University of Technology, Wallenberg Wood Science Center

Language: English

Topic: Lignin and Wood Chemistry

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,720

Funder: VINNOVA