Development of Eco-Friendly Composites Using Isocyanate-Modified Lignin and Polybutylene Adipate Terephthalate (PBAT)
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This study introduces eco-friendly composites using polybutylene adipate terephthalate (PBAT) and isocyanate-modified lignin (mLig). Lignin, derived from renewable biomass, undergoes surface modification by reacting its hydroxyl groups (-OH) with isocyanate groups (-NCO) from diisocyanate compounds. The successful incorporation of diisocyanate onto lignin was confirmed using advanced analytical techniques. PBAT-mLig composites are formed via twin-screw extrusion, resulting in improved mechanical properties compared to pure PBAT and PBAT composites with unmodified lignin. The composites show a uniform lignin dispersion within the polymer matrix. Optimizing the toxic diisocyanate content on lignin further enhances the mechanical properties of PBAT-mLig composites. This research presents a significant advancement in developing environmentally friendly composites with improved performance characteristics.