Abstract
This study evaluates the cradle-to-gate environmental life cycle impacts of lignin-derived polyurethane (LPU) using a life cycle assessment approach. It aims to explore sustainable alternatives for conventional petroleum-based and bio-based polyurethane foams by leveraging lignin, a renewable and abundant biomass component. The study compares sixteen biobased polyurethane production formulations, examining the effect of lignin fraction and molecular weight, biomass source, and intended application of PU foam. Results show that various factors, including lignin source/ type of feedstock, molecular weight of lignin, and intended application of PU foam, influence the environmental performance of LPU foam. The study underscores the potential of LPU foams as environmentally sustainable insulation materials while addressing limitations and future directions for enhancing their production processes.
Key Words: Polyurethane foam, Life cycle assessment, Lignin, Climate change, Sustainability