Molecular Structure of Lignin by SEC and FFF Separation with Advanced Detection
Presented by: Antje Potthast, Ph.D., BOKU University Vienna and Stepan Podzimek, Ph.D., Waters | Wyatt Technology
Presented Live: July 2, 2024
Lignin is the most abundant aromatic biopolymer which is inevitably released in large quantities and chemically modified form in different industrial conversion processes. The molecular structure is very complex and characterized by a multitude of different features like functional groups, linkage type or degree of condensation after industrial isolation. One of the most important characteristics for studies on the application of lignin is its molar mass distribution which will be the focus of this webinar.
Deeper understanding of lignin molecular structure is important for the use of lignin as efficient alternative to traditional crude oil-based products.
Classical and more recent methods for molar mass determination of lignins will be discussed. Special emphasis will be on possible problems and pitfalls associated with different types of lignin.
Multi-angle light scattering (MALS) detection to a large extent overcomes the limitations of SEC with conventional column calibration. Coupling the MALS detector with an online viscometer allows additional insight into the molecular structure.