Synthesis of Renewable Thermoset Polymers through Successive Lignin Modification Using Lignin-Derived Phenols
- Univ. of California, Santa Barbara, CA (United States). Dept. of Chemistry and Biochemistry
- Univ. of California, Santa Barbara, CA (United States). Dept. of Chemistry and Biochemistry, and Dept. of Chemical Engineering
An approach to lignin-based epoxy networks from both organosolv lignin and lignin derived phenol (dihydroeugenol) are developed using multiple chemical modifications including demethylation, phenolation and phenol-formaldehyde reaction. Structures of lignin incorporated novolac polyphenols (LINPs) and epoxy networks (LINENs) were characterized using proton nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy. Compared to a common synthesis route in which lignin was epoxidized prior to blend with comonomers (LBEN), LINEN derivatives exhibited improved crosslink density ($$ρ$$), $$α$$-relaxation temperature ($$T_α$$) and storage modulus in glassy region ($$E_g'$$) as obtained from dynamic mechanical analysis (DMA), and increased thermal stability measured by thermogravimetric analysis (TGA). This study widens the routes of lignin modification. Renewable epoxy networks derived from both lignin and lignin derivatives are economically and ecologically attractive.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Direct Catalytic Conversion of Biomass to Biofuels (C3Bio)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC000997
- OSTI ID:
- 1470490
- Journal Information:
- ACS Sustainable Chemistry & Engineering, Vol. 5, Issue 6; Related Information: C3Bio partners with Purdue University (lead); Argonne National Laboratory; National Renewable Energy Laboratory; Northeastern University; University of Tennessee; ISSN 2168-0485
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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