skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Conformations of low-molecular-weight lignin polymers in water

Journal Article · · ChemSusChem
 [1];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Low-molecular-weight lignin binds to cellulose during the thermochemical pretreatment of biomass for biofuel production, which prevents the efficient hydrolysis of the cellulose to sugars. The binding properties of lignin are influenced strongly by the conformations it adopts. Here, we use molecular dynamics simulations in aqueous solution to investigate the dependence of the shape of lignin polymers on chain length and temperature. Lignin is found to adopt collapsed conformations in water at 300 and 500 K. However, at 300 K, a discontinuous transition is found in the shape of the polymer as a function of the chain length. Below a critical degree of polymerization, Nc=15, the polymer adopts less spherical conformations than above Nc. The transition disappears at high temperatures (500 K) at which only spherical shapes are adopted. As a result, an implication relevant to cellulosic biofuel production is that lignin will self-aggregate even at high pretreatment temperatures.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1327737
Journal Information:
ChemSusChem, Vol. 9, Issue 3; ISSN 1864-5631
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

References (64)

Lignin Valorization: Improving Lignin Processing in the Biorefinery journal May 2014
Predicting Enzyme Adsorption to Lignin Films by Calculating Enzyme Surface Hydrophobicity journal May 2014
Chemistry of lignin-based materials journal September 2013
Milled Wood Lignin: A Linear Oligomer journal November 2011
Lignin depolymerization/repolymerization and its critical role for delignification of aspen wood by steam explosion journal November 2007
Pseudo-lignin and pretreatment chemistry journal January 2011
The fate of lignin during hydrothermal pretreatment journal January 2013
Visualizing lignin coalescence and migration through maize cell walls following thermochemical pretreatment journal December 2008
The lignin present in steam pretreated softwood binds enzymes and limits cellulose accessibility journal January 2012
Investigation of lignin deposition on cellulose during hydrothermal pretreatment, its effect on cellulose hydrolysis, and underlying mechanisms: Investigation of Lignin Deposition on Cellulose journal October 2013
Enzymatic conversion of lignocellulose into fermentable sugars: challenges and opportunities journal October 2007
Substrate and Enzyme Characteristics that Limit Cellulose Hydrolysis journal October 1999
How Does Plant Cell Wall Nanoscale Architecture Correlate with Enzymatic Digestibility? journal November 2012
Adsorption of Trichoderma reesei CBH I and EG II and their catalytic domains on steam pretreated softwood and isolated lignin journal January 2004
Inhibition of cellulase, xylanase and β-glucosidase activities by softwood lignin preparations journal September 2006
Effect of poly(ethylene glycol) on enzymatic hydrolysis and adsorption of cellulase enzymes to pretreated lignocellulose journal July 2007
The impact of lignin source on its self-assembly in solution journal January 2015
Poly(Ethylene Oxide)/Organosolv Lignin Blends:  Relationship between Thermal Properties, Chemical Structure, and Blend Behavior journal September 2004
Collapse of a polymer chain in poor solvents journal January 1975
Globule-to-Coil Transition of a Single Homopolymer Chain in Solution journal May 1998
Simulation study of the collapse of linear and ring homopolymers journal August 1995
Simulation of short-chain polymer collapse with an explicit solvent journal April 2002
Block Copolymer Thermodynamics: Theory and Experiment journal October 1990
On the Origins of Morphological Complexity in Block Copolymer Surfactants journal April 2003
Self-Assembled Aggregates of Rod-Coil Block Copolymers and Their Solubilization and Encapsulation of Fullerenes journal March 1998
Conformations of intrinsically disordered proteins are influenced by linear sequence distributions of oppositely charged residues journal July 2013
Micellization of amphiphiles: selected aspects journal May 1997
Conformational Polymorphism of Amphiphilic Polymers in a Poor Solvent journal December 2003
Lignins: Natural polymers from oxidative coupling of 4-hydroxyphenyl- propanoids journal January 2004
Theoretical Study of the Remarkably Diverse Linkages in Lignin journal October 2011
Computational Study of Bond Dissociation Enthalpies for a Large Range of Native and Modified Lignins journal October 2011
Chemical Factors that Control Lignin Polymerization journal December 2013
Radical Coupling Reactions in Lignin Synthesis: A Density Functional Theory Study journal April 2012
Molecular simulation as a tool for studying lignin journal December 2011
ReaxFF Study of the Oxidation of Lignin Model Compounds for the Most Common Linkages in Softwood in View of Carbon Fiber Production journal January 2014
Self-similar multiscale structure of lignin revealed by neutron scattering and molecular dynamics simulation journal June 2011
Simulation Analysis of the Temperature Dependence of Lignin Structure and Dynamics journal December 2011
Molecular Modeling of the Structural and Dynamical Properties of Secondary Plant Cell Walls: Influence of Lignin Chemistry journal March 2012
Solvent-Driven Preferential Association of Lignin with Regions of Crystalline Cellulose in Molecular Dynamics Simulation journal September 2013
Plant Biomass Recalcitrance: Effect of Hemicellulose Composition on Nanoscale Forces that Control Cell Wall Strength journal December 2013
Molecular Origin of Strength and Stiffness in Bamboo Fibrils journal June 2015
Why genetic modification of lignin leads to low-recalcitrance biomass journal January 2015
Morphological variation in a collapsed single homopolymer chain journal September 1998
Chain length dependence of the state diagram of a single stiff-chain macromolecule: Theory and Monte Carlo simulation journal February 2003
Morphological changes in the cellulose and lignin components of biomass occur at different stages during steam pretreatment journal January 2014
Loss of function of cinnamyl alcohol dehydrogenase 1 leads to unconventional lignin and a temperature-sensitive growth defect in Medicago truncatula journal July 2013
Downregulation of Cinnamyl Alcohol Dehydrogenase (CAD) Leads to Improved Saccharification Efficiency in Switchgrass journal January 2011
Altered Lignin Biosynthesis Improves Cellulosic Bioethanol Production in Transgenic Maize Plants Down-Regulated for Cinnamyl Alcohol Dehydrogenase journal July 2012
Structural Characterization of Glycoconjugate Polystyrene in Aqueous Solution journal March 1999
The effect of initial pore volume and lignin content on the enzymatic hydrolysis of softwoods journal May 1998
The new forestry biofuels sector journal January 2008
Comparison of simple potential functions for simulating liquid water journal July 1983
A molecular mechanics force field for lignin journal February 2009
Scalable molecular dynamics with NAMD journal January 2005
Particle mesh Ewald: An N ⋅log( N ) method for Ewald sums in large systems journal June 1993
A smooth particle mesh Ewald method journal November 1995
Numerical integration of the cartesian equations of motion of a system with constraints: molecular dynamics of n-alkanes journal March 1977
Constant pressure molecular dynamics algorithms journal September 1994
Constant pressure molecular dynamics simulation: The Langevin piston method journal September 1995
Optimizing Liquid Hot Water pretreatment conditions to enhance sugar recovery from wheat straw for fuel-ethanol production journal December 2008
Pyrolysis behavior of Japanese cedar wood lignin studied with various model dimers journal March 2008
Effects of various solvents on the liquefaction of biomass to produce fuels and chemical feedstocks journal December 2008
Universal features of polymer shapes journal January 1986
A molecular dynamics study on universal properties of polymer chains in different solvent qualities. Part I. A review of linear chain properties journal March 2005

Cited By (6)

Coupling Nanofibril Lateral Size and Residual Lignin to Tailor the Properties of Lignocellulose Films journal August 2019
Molecular-level driving forces in lignocellulosic biomass deconstruction for bioenergy journal October 2018
Impact of hydration and temperature history on the structure and dynamics of lignin journal January 2018
Recent progress in theoretical and computational studies on the utilization of lignocellulosic materials journal January 2019
Lignin Biopolymers in the Age of Controlled Polymerization journal July 2019
Wood-Moisture Relationships Studied with Molecular Simulations: Methodological Guidelines text January 2019

Similar Records

Simulation Analysis of the Temperature Dependence of Lignin Structure and Dynamics
Journal Article · Sat Jan 01 00:00:00 EST 2011 · Journal of the American Chemical Society · OSTI ID:1327737

Simulation analysis of the temperature dependence of lignin structure and dynamics
Journal Article · Sat Jan 01 00:00:00 EST 2011 · Journal of the American Chemical Society · OSTI ID:1327737

Effect of lignin content on changes occurring in poplar cellulose ultrastructure during dilute acid pretreatment
Journal Article · Tue Oct 14 00:00:00 EDT 2014 · Biotechnology for Biofuels · OSTI ID:1327737