Effect of Fractionated Lignin Polyol Addition on Physicochemical Properties of Ligno-Polyurethane
발표자
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초록
내용
Polyurethane (PU) is a representative petrochemical industry-based material, made through the reaction of alcohol-based polyols and isocyanate, and can be used in various industrial fields. However, as it affects environmental pollution, the interest in developing eco-friendly PU is increasing. Lignin, a type of biomass, has the potential to replace petrochemical-based polyols in polyurethane materials because it is abundant in nature, inexpensive, and has various functional groups including a large amount of hydroxyl groups. However, the unique rigid structure and low reactivity of lignin are major obstacles to the direct application of lignin as a polyol. To improve these disadvantages of lignin, in this study, kraft lignin was fractionated with ethanol, one of the eco-friendly solvents. The prepared ethanol-fractionated lignin was used as a polyol in the synthesis of PU. Finally, the physicochemical properties of PU using ethanol-fractionated lignin as a polyol were analyzed in depth.