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Title: Method To Synthesize Micronized Spherical Carbon Particles from Lignin

Abstract

Spherical carbon particles are versatile products that are of interest in polymer modification and scaffolding, catalysis, and energy storage applications. Despite various complex synthesis methods available currently, there is a need for simplified synthesis techniques to develop spherical carbon particles from sustainable feedstock. Here, we report a simple method for manufacturing micronized carbon particles from lignin, a plant biomass derived phenolic oligomer. By careful selection of a good, high boiling solvent that can fully solvate and stabilize lignin, we were able to create spherical free-flowing carbon particles from lignin by a simple solvothermal process and subsequent carbonization. During solvothermal reaction, lignin degrades into fragments via its thermally sensitive bonds. Simultaneously, the residual lignin and its fragments repolymerize, condense into highly cross-linked structures, and eventually precipitate out of solution with a spherical shape. Infrared and NMR spectroscopy data in combination with the rheological properties of thermally condensed, solvated oligomer elucidate evolution in the chemical architecture of lignin. Finally, the coarse-grained molecular dynamics simulations revealed the growth of spherical char from lignin in a good solvent through intermolecular condensation. X-ray diffraction and electron microscopy data show the morphology of the carbonized product—an increase in the carbonization temperature enhances the structural order.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1608217
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 59; Journal Issue: 1; Journal ID: ISSN 0888-5885
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; chemical structure; solvents; biopolymers; organic polymers; solvothermal reaction

Citation Formats

Ho, Hoi Chun, Bonnesen, Peter V., Nguyen, Ngoc A., Cullen, David A., Uhrig, David, Goswami, Monojoy, Keum, Jong K., and Naskar, Amit K.. Method To Synthesize Micronized Spherical Carbon Particles from Lignin. United States: N. p., 2019. Web. https://doi.org/10.1021/acs.iecr.9b05143.
Ho, Hoi Chun, Bonnesen, Peter V., Nguyen, Ngoc A., Cullen, David A., Uhrig, David, Goswami, Monojoy, Keum, Jong K., & Naskar, Amit K.. Method To Synthesize Micronized Spherical Carbon Particles from Lignin. United States. https://doi.org/10.1021/acs.iecr.9b05143
Ho, Hoi Chun, Bonnesen, Peter V., Nguyen, Ngoc A., Cullen, David A., Uhrig, David, Goswami, Monojoy, Keum, Jong K., and Naskar, Amit K.. Tue . "Method To Synthesize Micronized Spherical Carbon Particles from Lignin". United States. https://doi.org/10.1021/acs.iecr.9b05143. https://www.osti.gov/servlets/purl/1608217.
@article{osti_1608217,
title = {Method To Synthesize Micronized Spherical Carbon Particles from Lignin},
author = {Ho, Hoi Chun and Bonnesen, Peter V. and Nguyen, Ngoc A. and Cullen, David A. and Uhrig, David and Goswami, Monojoy and Keum, Jong K. and Naskar, Amit K.},
abstractNote = {Spherical carbon particles are versatile products that are of interest in polymer modification and scaffolding, catalysis, and energy storage applications. Despite various complex synthesis methods available currently, there is a need for simplified synthesis techniques to develop spherical carbon particles from sustainable feedstock. Here, we report a simple method for manufacturing micronized carbon particles from lignin, a plant biomass derived phenolic oligomer. By careful selection of a good, high boiling solvent that can fully solvate and stabilize lignin, we were able to create spherical free-flowing carbon particles from lignin by a simple solvothermal process and subsequent carbonization. During solvothermal reaction, lignin degrades into fragments via its thermally sensitive bonds. Simultaneously, the residual lignin and its fragments repolymerize, condense into highly cross-linked structures, and eventually precipitate out of solution with a spherical shape. Infrared and NMR spectroscopy data in combination with the rheological properties of thermally condensed, solvated oligomer elucidate evolution in the chemical architecture of lignin. Finally, the coarse-grained molecular dynamics simulations revealed the growth of spherical char from lignin in a good solvent through intermolecular condensation. X-ray diffraction and electron microscopy data show the morphology of the carbonized product—an increase in the carbonization temperature enhances the structural order.},
doi = {10.1021/acs.iecr.9b05143},
journal = {Industrial and Engineering Chemistry Research},
number = 1,
volume = 59,
place = {United States},
year = {2019},
month = {11}
}

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