TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Bergrath, Jonas
A1  - Zeppetzauer, Franz
A1  - Rumpf, Jessica
A1  - Kamm, Birgit
A1  - Putz, Robert
A1  - Kling, Hans-Willi
A1  - Schulze, Margit
T1  - Mechanochemical Tailoring of Lignin Structure: Influence of Different Particle Sizes in the Organosolv Process
JF  - Macromolecular Bioscience
N2  - The autocatalyzed ethanolic organosolv process is gaining increasing attention for the sulfur-free isolation of lignin, which is subsequently used as a renewable substitute for various fossil-based applications. For the first time, the mechanochemical influence of seven different particle sizes of two different biomasses on the respective organosolv lignin structure is examined. Wine pruning (Pinot Noir) and wine pomace (Accent) are used for organosolv process with particle sizes ranging from 2.0–1.6 mm to less than 0.25 mm. As particle size decreases, the weight-average molecular weight increases, while the total phenol content decreases significantly. Additionally, the distribution of the lignin-typical monolignols and relevant substructures, as determined by two-dimensional heteronuclear nuclear magnetic resonance spectra single quantum coherence (HSQC), is observed. The degree of grinding of the biomass has a clear chemical–structural influence on the isolated HG and HGS organosolv lignins. Therefore, it is crucial to understand this influence to apply organosolv lignins in a targeted manner. In the future, particle size specifications in the context of the organosolv process should be expressed in terms of distribution densities rather than in terms of a smaller than specification.
KW  - lignin linkage
KW  - molecular weight
KW  - organosolv lignin
KW  - particle size
Y1  - 2024
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-84819
SN  - 1616-5187
SS  - 1616-5187
U6  - https://doi.org/10.1002/mabi.202400090
DO  - https://doi.org/10.1002/mabi.202400090
PM  - 38899790
VL  - 24
IS  - 9
SP  - 8
S1  - 8
PB  - Wiley-VCH
CY  - Weinheim
ER  -