Artículo
Supercritical CO2-assisted impregnation of LDPE/sepiolite nanocomposite films with insecticidal terpene ketones: Impregnation yield, crystallinity and mechanical properties assessment
Goñi, Maria Laura
; Gañan, Nicolas Alberto
; Barbosa, Silvia Elena
; Strumia, Miriam Cristina
; Martini, Raquel Evangelina
Fecha de publicación:
06/2017
Editorial:
Elsevier Science
Revista:
Journal of Supercritical Fluids
ISSN:
0896-8446
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this contribution, supercritical CO2-assisted impregnation of LDPE/sepiolite nanocomposite films with two insecticidal terpene ketones (thymoquinone and R-(+)-pulegone) is investigated, as a strategy to enhance the loading capacity compared to pure LDPE. A factorial experimental design was applied in order to evaluate the effect of five process variables at two levels (sepiolite content: 1–10% w/w; initial ketone mole fraction: 0.0017–0.0025; pressure: 9–13 MPa; depressurization rate: 0.5–2.0 MPa/min; time: 2–4 h) on impregnation yield, at 45 °C. ANOVA test of the results indicated that pressure, time and ketone mole fraction significantly affect impregnation yield (ranging between 2.36 ± 0.18 and 8.60 ± 1.66% w/w). Thermal analysis (DSC) and X-ray diffraction (XRD) allowed to investigate the nanocomposite morphology and the modifications induced by the impregnation. The mechanical properties of the films were assessed by stress-strain tests, showing that the impregnation process had a very low impact on the material ductility and strength.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IPQA)
Articulos deINSTITUTO DE INVESTIGACION Y DESARROLLO EN INGENIERIA DE PROCESOS Y QUIMICA APLICADA
Articulos deINSTITUTO DE INVESTIGACION Y DESARROLLO EN INGENIERIA DE PROCESOS Y QUIMICA APLICADA
Citación
Goñi, Maria Laura; Gañan, Nicolas Alberto; Barbosa, Silvia Elena; Strumia, Miriam Cristina; Martini, Raquel Evangelina; Supercritical CO2-assisted impregnation of LDPE/sepiolite nanocomposite films with insecticidal terpene ketones: Impregnation yield, crystallinity and mechanical properties assessment; Elsevier Science; Journal of Supercritical Fluids; 130; 6-2017; 337-346
Compartir
Altmétricas