Morphology, Properties and Antibacterial Activity of Neutralized Chitosan-Cellulose Nanocrystals Biocomposite Films.

PERUZZO, P.J.; ANBINDER, P.S.; AMALVY, J.I.; BOLLA, P.A.; SERRADELL, M. DE LOS A.; CORSELLO, F.A.

CARBOHYDRATE POLYMERS

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2017 vol. 156 p. 452 - 459

0144-8617

Chitosan/cellulosenanocrystals  (CH-CN) films were obtainedby casting of dispersions, and treated with NaOH for neutralization proposes.The composition of films was varied from 1-10 wt.% of CN. Changes in themorphology of the systems were correlated with the different propertiesstudied. FTIR revealed the presence of a weak interaction between the polymermatrix and nanofiller, confirmed by a slightly increase in thermal stability.SEM images suggested that incorporating CN amounts higher than 3 wt.% generatesphase-segregated systems, and SAXS showed that CH avoid the typical organization of CN atconcentrations below 5 wt.%. Improvedperformance against water was obtained in composite materials comparing to thepure polymer matrix, as well as CH and CH-CN films did not show antibacterialactivity demonstrating that remnant acetic acid, when no neutralization step isdone, plays an important role in this property.