Radical–quinone chain suppression in Catechyl lignin via isocyanate modification for permanently whitened and dispersible optical additives

Puntos clave

• The aim is to investigate how isocyanate modification can reduce color and enhance dispersibility in lignin for optical uses.
• Modified lignin using isocyanates to alter its chemical structure.
• Analyzed the effects on color and optical properties through various spectroscopic techniques.
• Conducted assessments on dispersibility in different environments.
• Successfully reduced the intrinsic dark color of lignin.
• Enhanced the dispersibility of modified lignin in optical plastics.
• Demonstrated potential for using modified lignin as a bio-based optical additive.