Study on the Properties of Cellulose Transparent Films Reinforced with Regenerated Lignin Particles
Crude lignin was extracted from sulfate pulping black liquor by chelation with calcium ions.Subsequently,the crude lignin under-went dissolution and regeneration by employing an ethanol-water anti-solvent method,resulting in the production of pure lignin particles.The resulting regenerated lignin particles demonstrated a fine and uniform granular morphology while remaining stably suspended in water.Lignin particles could form robust hydrogen bonds with cellulose,leading to the formation of dense and uniform composite transparent films.The tensile strength of the lignin-cellulose film(the dosage of lignin was 10％)reached 105.77 MPa,an increase of 27.6％compared with the pure cellulose film,the elongation increased by 67.6％.In terms of optics,the visible light transmittance of the lignin-cellulose film(the dosage of lignin was 5％)reached 87.9％.
black liquorregenerated lignin particlescalcium acetatelignin-cellulose film
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