DOE OSTI · 3001743
Tuning the Properties of Lignin‐Derived Deep Eutectic Solvents for Biomass Processing
Abstract
Lignin-derived deep eutectic solvents (DESs) have been investigated as sustainable green media for biomass processing. However, the properties and processability of DESs have not been fully understood with the chemical structures of their constituents for biomass fractionation. Here, in this article, the properties of the phenolic DESs are discussed with different numbers of functional groups, such as –OCH 3 and –CHO in their hydrogen bond donor (HBD) structures. The formation of DES is significantly related to the hydrogen bond between its constituents, identified by nuclear magnetic resonance (NMR) analysis and density functional theory calculation (DFT). Lower viscosity and net basicity of DES are achieved with fewer –OCH 3 on HBD structures, resulting in enhanced processability and fractionation efficiency. The thermal stability of the DES is also influenced by the –OCH 3 and –CHO of HBD, as indicated by its onset temperature. The recyclability of the phenolic DES is confirmed by the fractionation performance of the recycled DES. Understanding the structural impacts of DES constituents on the properties and performance is crucial for designing solvents in biorefinery applications.
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Ryu, Jiae [State University of New York (SUNY), Syracuse, NY (United States)], Jeong, Keunhong [Korea Military Academy, Seoul (Korea, Republic of)], Yoon, Chaehwi [State University of New York (SUNY), Syracuse, NY (United States)], Wang, Yunxuan [Univ. of Tennessee, Knoxville, TN (United States)] (ORCID:0000000180950484), He, Zitong [State University of New York (SUNY), Syracuse, NY (United States)], Ragauskas, Arthur J. [University of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000023536554X), Leem, Gyu [State University of New York (SUNY), Syracuse, NY (United States)], Park, Min Bum [State University of New York (SUNY), Syracuse, NY (United States); Incheon National University (Korea, Republic of)], Kim, Kwang Ho [University of British Columbia, Vancouver, BC (Canada)], Yoo, Chang Geun [State University of New York (SUNY), Syracuse, NY (United States)] (ORCID:0000000261792414). 2025-07-03. Tuning the Properties of Lignin‐Derived Deep Eutectic Solvents for Biomass Processing. https://doi.org/10.1002/cssc.202500701
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