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Study on the Properties of Cellulose Transparent Films Reinforced with Regenerated Lignin Particles
Received:August 16, 2023  
DOI：10.11980/j.issn.0254-508X.2024.02.003
Key Words:black liquor  regenerated lignin particles  calcium acetate  lignin-cellulose film
Fund Project:高校产学合作项目（2021H 6024）；国家留学基金委项目（No. 202208350063）；四川省科技厅项目（2021YFH0105，2023JDGD0032）。
Author NameAffiliationPostcode
FU Chenglong College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108
Limerick Pulp and Paper Centre， University of New Brunswick， Fredericton， E3B5A3， Canada 
LIN Yaling College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
LIU Yishan Limerick Pulp and Paper Centre， University of New Brunswick， Fredericton， E3B5A3， Canada
Sichuan Technology & Business College， Dujiangyan， Sichuan Province， 611830 		611830
HUANG Liulian* College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 350108
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Abstract:Crude lignin was extracted from sulfate pulping black liquor by chelation with calcium ions. Subsequently， the crude lignin underwent 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%.
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