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Processus de spectroscopie de la lignine

Processus de spectroscopie de la lignine

Danilo Cardoso Ferreira

48,55 €
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Editorial:
KS OmniScriptum Publishing
Año de edición:
2024
Materia
Física
ISBN:
9786207780310
48,55 €
IVA incluido
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Dans ce travail, nous présentons des films ultra-minces (nanomètres d’épaisseur) de lignines extraites de la bagasse de canne à sucre en utilisant la technique d’évaporation sous vide (dépôt physique en phase vapeur - PVD) dans le but de faire progresser l’étude des propriétés moléculaires des lignines. Les principales informations obtenues dans ce projet concernent la possibilité de fabriquer des films PVD de qualité en termes d’intégrité chimique de la molécule une fois qu’elle a été chauffée, ainsi que l’optimisation du contrôle de l’épaisseur, de l’homogénéité et de l’arrangement moléculaire de ces lignines dans les films PVD. La croissance des films a été contrôlée par spectroscopie d’absorption dans l’ultraviolet et le visible (UV-vis), tandis que l’intégrité chimique a été vérifiée par spectroscopie d’absorption infrarouge à transformée de Fourier (FTIR). La lignine étudiée a été extraite de la bagasse de canne à sucre par un procédé 'organosolve modifié' utilisant différents solvants organiques.

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