Lignin-Based Bioproducts: Creating Value from the Underutilized Portion of Biomass
Lignin, a complex aromatic biopolymer derived from wood and agricultural residues, is a promising sustainable alternative to petroleum-derived chemicals such as phenol, polyol, and bisphenol A (BPA), which are used in phenolic, polyurethane (PU), and epoxy resins. This talk will highlight our research focused on lignin valorization for the development of biobased adhesives, coatings, foams, and composites. We created a fully biobased adhesive by replacing phenol with corn stover lignin and formaldehyde with glyoxal, achieving suitable dry strength for interior-grade plywood and OSB. We also converted technical lignins into liquid polyols to formulate rigid PU foams for insulation, flexible foams for automotive seating, and structural adhesives for mass timber applications (CLT and glulam). Additionally, we formulated fully biobased epoxy resins by substituting BPA with lignin, using biobased epichlorohydrin and a cashew nutshell-derived curing agent. Reinforced with bamboo fibers, these fully biobased composites outperformed BPA-based counterparts in mechanical strength due to improved lignin–fiber compatibility. With lignin containing over 60% biobased carbon, these lignin-derived products mark meaningful progress toward carbon-neutral construction and automotive components, contributing to more sustainable and environmentally friendly products.
Speaker Biography:
Mojgan Nejad is an Associate Professor with a joint appointment in the Department of Forestry and the Department of Chemical Engineering and Materials Science at Michigan State University. She holds a bachelor’s degree in applied chemistry and a PhD in wood science. Her current research focuses on developing lignin-based coatings, adhesives, foams, and composites, primarily in collaboration with industry partners. She has received several awards, including the Adhesive and Sealant Council Innovation Award in 2018, the Polyurethane Foam Association (PFA) Herman Stone Technical Excellence Award in 2023, and the CARES Automotive Sustainability Innovation Award in 2024.
