Enhancement of UV absorbance and mechanical properties of chitosan films by the incorporation of solvolytically fractionated lignins.
Journal
International journal of biological macromolecules
ISSN: 1879-0003
Titre abrégé: Int J Biol Macromol
Pays: Netherlands
ID NLM: 7909578
Informations de publication
Date de publication:
15 Jul 2020
15 Jul 2020
Historique:
received:
10
11
2019
revised:
01
03
2020
accepted:
16
03
2020
pubmed:
22
3
2020
medline:
12
3
2021
entrez:
22
3
2020
Statut:
ppublish
Résumé
In this work, an effective sequential organic solvent extraction of kraft and organosolv lignins was carried out to separate lignin into more homogeneous fractions with specific properties. The selected solvents were ethyl acetate, ethanol, methanol, and acetone in that order. Fractions were analysed in terms of their yield, molecular weight, S/G ratio, and phenolic hydroxyl groups content. The incorporation of lignin fractions into the chitosan was aimed to increase the UV absorbance and the mechanical resistance of the chitosan films, which would provide good properties for applications in the packaging field. Films were analysed in terms of UV-vis absorption spectra, tensile strength, as well as colour changes. Results showed a significant increase in the absorbance of UV-A and UV-B with the addition of lignin fractions, mechanical properties showed an increase in the ultimate tensile strength in case of kraft fractions, while organosolv fractions do not affect tensile strength significantly.
Identifiants
pubmed: 32198041
pii: S0141-8130(19)39178-0
doi: 10.1016/j.ijbiomac.2020.03.162
pii:
doi:
Substances chimiques
Solvents
0
Lignin
9005-53-2
Chitosan
9012-76-4
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
447-455Informations de copyright
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