Monitoring Molecular Weight Changes during Technical Lignin Depolymerization by Operando Attenuated Total Reflectance Infrared Spectroscopy and Chemometrics.

ABSTRACT: Technical lignins are increasingly available at industrial scale, offering opportunities for valorization, such as by (partial) depolymerization. Any downstream lignin application requires careful tailoring of structural properties, such as molecular weight or functional group density, properties that are difficult to control or predict given the structure variability and recalcitrance of technical lignins. Online insight into changes in molecular weight (M_w ), to gauge the extent of lignin depolymerization and repolymerization, would be highly desired to improve such control, but cannot be readily provided by the standard ex-situ techniques, such as size exclusion chromatography (SEC). Herein, operando attenuated total reflectance infrared (ATR-IR) spectroscopy combined with ch

SUBMITTER: Khalili KNM 

PROVIDER: S-EPMC9299174 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature