Formation of cellulose acetate-graphene oxide nanocomposites by supercritical CO2 assisted phase inversion

Baldino, L. ; Sarno, M. ; Cardea, S. ; Irusta, S. (Universidad de Zaragoza) ; Ciambelli, P. ; Santamaria, J. (Universidad de Zaragoza) ; Reverchon, E.

Resumen: Cellulose acetate (CA)/graphene oxide (GO) nanocomposite membranes were generated by an assisted phase inversion process, based on the use of SC–CO2 as nonsolvent, operating at 200 bar and 40 °C; loadings of GO up to 9% w/w were tested. The structures maintained the cellular morphology, characteristics of CA membranes, also at the highest GO loadings used, with a porosity of about 80%, but the presence of GO influenced the pore sizes, that ranged between about 9 and 16 µm. The starting GO and the nanocomposite structures were characterized by the combination of various techniques that evidence as sulfur and chlorinated impurities, that were present in the starting GO material, were completely eliminated by the interaction with SC–CO2 during structures formation; moreover, a partial reduction of GO to graphene was also observed.

Idioma: Inglés

DOI: 10.1021/acs.iecr.5b01452

Año: 2015

Publicado en: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 54, 33 (2015), 8147-8156
ISSN: 0888-5885

Factor impacto JCR: 2.567 (2015)

Categ. JCR: ENGINEERING, CHEMICAL rank: 34 / 135 = 0.252 (2015) - Q2 - T1

Factor impacto SCIMAGO: 0.938 - Chemical Engineering (miscellaneous) (Q1) - Industrial and Manufacturing Engineering (Q1) - Chemistry (miscellaneous) (Q1)

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)