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Title: Bacterial cellulose/graphene oxide aerogels with enhanced dimensional and thermal stability
Author: Pinto, Susana C.
Gonçalves, Gil
Sandoval, Stefania
López-Periago, Ana M.
Borras, Alejandro
Domingo, Concepción
Tobias, Gerard
Duarte, Isabel
Vicente, Romeu
Marques, Paula A.A.P.
Keywords: Bacterial cellulose
Graphene oxide
Reduction treatments
Dimensional stability
Thermal stability
Issue Date: 11-Nov-2019
Publisher: Elsevier
Abstract: We present a novel method for processing bacterial cellulose/graphene oxide (BC/GO) aerogels with multifunctional properties. The addition of a small amount of dimethyl sulfoxide (DMSO) to the aqueous dispersion of the nanomaterials during the gelification process affected the water freezing temperature of the system and thereby affecting the porous structure of the aerogel obtained after liophilization. The possibility to obtain small and elongated pore with axial orientation allowed a significant improvement of the structural stability of the aerogels. Moreover, the aerogels reduction by thermal treatment with ammonia gas induced crosslinking between the different nanophases, thus given an incremental factor for the mechanical performance of the aerogels under harsh conditions. The resulting aerogels also showed significant improvements in terms of thermal stability and electrical conductivity. These multifunctional BC/GO aerogels present high potential as sustainable and ecological alternative materials for lightweight packaging, filters for atmosphere and water treatment, or energy applications.
Peer review: yes
DOI: 10.1016/j.carbpol.2019.115598
ISSN: 0144-8617
Publisher Version:
Appears in Collections:TEMA - Artigos
DEM - Artigos

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