Morphology and properties of neutralized chitosan-cellulose nanocrystals biocomposite films.
Carbohydr Polym
; 156: 452-459, 2017 Jan 20.
Article
em En
| MEDLINE
| ID: mdl-27842846
ABSTRACT
Chitosan/cellulose nanocrystals (CH-CN) films were obtained by casting of dispersions, and treated with NaOH for neutralization proposes. The composition of films was varied from 1 to 10wt.% of CN. Changes in the morphology of the systems were correlated with the different properties studied. FTIR revealed the presence of a weak interaction between the polymer matrix and nanofiller, confirmed by a slightly increase in thermal stability. SEM images suggested that incorporating CN amounts higher than 3wt.% generates phase-segregated systems, and SAXS showed that CH avoid the typical organization of CN at concentrations below 5wt.%. Improved performance against water was obtained in composite materials comparing to the pure polymer matrix, as well as CH and CH-CN films did not show antibacterial activity demonstrating that remnant acetic acid, when no neutralization step is done, plays an important role in this property.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Celulose
/
Quitosana
/
Nanocompostos
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Argentina