INVESTIGADORES
MAURI Adriana Noemi
artículos
Título:
Synthesis and conservation of cellulose nanocrystals
Autor/es:
DI GIORGIO, LUCIANA; MARTÍN, LUCÍA; SALGADO, PABLO R.; MAURI, ADRIANA N.
Revista:
CARBOHYDRATE POLYMERS
Editorial:
ELSEVIER SCI LTD
Referencias:
Año: 2020 vol. 238
ISSN:
0144-8617
Resumen:
This work deals with the preparation of cellulose nanocrystals (CNC) from microcrystalline cellulose by acid hydrolysis, discusses how their characteristics varied according to the drying technique used for their conservation and analyzes their re-dispersion in water. A stable water dispersion of ?rod? or ?needle? type CNC (≈5nm of diameter, 276nm of length and 41mV of Z potencial) was initially prepared and then dried by lyophilization and spray. Thus powders with similar cristalinity but different morphology were obtained, while CNC seemed to aggregate in such an extent that hindered their re-dispersion in water. Only lyophilized CNC could be re-dispersed in water and maintained stable in dispersion for at least 24h, when working with concentrations of CNC higher than a certain minimum value (3 %) and after submitting them to intense ultrasound treatments. The tested time achieved should be enough to allow their subsequent use in several applications.