title: Morphology and properties of neutralized chitosan-cellulose nanocrystals biocomposite films.
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.
authors.affiliation: Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, INIFTA (UNLP-CONICET CCT La Plata), Diag. 113 y 64 (B1904DPI), CC 16 Suc. 4, La Plata, Argentina.
authors.forename: F A
authors.initials: FA
authors.lastname: Corsello
authors.affiliation: Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco", CINDECA (UNLP-CONICET CCT La Plata), Calle 47 N° 257 (B1900AJK), La Plata, Argentina; Universidad Nacional Arturo Jauretche-UNAJ, Av. Calchaquí 6200, 1888 Florencio Varela, Argentina.
authors.forename: P A
authors.initials: PA
authors.lastname: Bolla
authors.affiliation: Instituto de Física de Materiales Tandil-IFIMAT (UNCPBA), CIFICEN (UNCPBA-CICPBA-CONICET), Pinto 399, 7000 Tandil, Argentina.
authors.forename: P S
authors.initials: PS
authors.lastname: Anbinder
authors.affiliation: Cátedra de Microbiología, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), 47 y 115 s/n, 1900 La Plata, Argentina; Universidad Nacional Arturo Jauretche-UNAJ, Av. Calchaquí 6200, 1888 Florencio Varela, Argentina.
authors.forename: M A
authors.initials: MA
authors.lastname: Serradell
authors.affiliation: Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, INIFTA (UNLP-CONICET CCT La Plata), Diag. 113 y 64 (B1904DPI), CC 16 Suc. 4, La Plata, Argentina.
authors.forename: J I
authors.initials: JI
authors.lastname: Amalvy
authors.affiliation: Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, INIFTA (UNLP-CONICET CCT La Plata), Diag. 113 y 64 (B1904DPI), CC 16 Suc. 4, La Plata, Argentina; Universidad Nacional Arturo Jauretche-UNAJ, Av. Calchaquí 6200, 1888 Florencio Varela, Argentina. Electronic address: pjperuzzo@inifta.unlp.edu.ar.
authors.forename: P J
authors.initials: PJ
authors.lastname: Peruzzo
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D053838:Scattering, Small Angle; D014961:X-Ray Diffraction
chemical_list: D002482:Cellulose; D048271:Chitosan
keywords: Bionanocomposites; Cellulose nanocrystals; Chitosan