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A Quantitative Molecular Atlas for Interactions Between Lignin and Cellulose

Published on Dec 16, 2019in ACS Sustainable Chemistry & Engineering6.97
· DOI :10.1021/acssuschemeng.9b04648
Josh V. Vermaas10
Estimated H-index: 10
(NREL: National Renewable Energy Laboratory),
Michael F. Crowley36
Estimated H-index: 36
(NREL: National Renewable Energy Laboratory),
Gregg T. Beckham50
Estimated H-index: 50
(NREL: National Renewable Energy Laboratory)
Abstract
Lignin and cellulose are two of the most abundant polymers on Earth, and are found in close proximity within plant cell walls. Despite their ubiquity, relatively little is known quantitatively about their interactions within plants, and by extension how their interaction may affect industrial biomass utilization. Given the inherent heterogeneity of the lignin polymer and the structural complexity of cellulose, quantitative relationships between given cellulose faces and specific lignin chemistries have been challenging to ascertain experimentally. In this study, we use molecular simulation to examine individual combinations of cellulose binding face and lignin chemistry to build a quantitative lignin-cellulose interaction atlas, including contributions from both specific hydrogen bonds observed in simulation and nonspecific interactions between lignin and cellulose driven by solvent considerations. Over all monomeric and dimeric lignin chemistries tested, the hydrophobic 100 face is the preferred cellulos...
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