Free-standing graphene films embedded in epoxy resin with enhanced thermal properties
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Author/sBustero, Izaskun; Gaztelumendi, Idoia; Obieta, Isabel; Mendizabal, María Asun; Zurutuza, Amaia; [et al.]
Polymer-matrix composites (PMCs)
Scanning electron microscopy (SEM)
The poor thermal conductivity of polymer composites has long been a deterrent to their increased use in high-end aerospace or defence applications. This study describes a new approach for the incorporation of graphene in an epoxy resin, through the addition of graphene as free-standing film in the polymeric matrix. The electrical and thermal conductivity of composites embedding two different free-standing graphene films was compared to composites with embedded carbon nanotube buckypapers (CNT-BP). Considerably higher thermal conductivity values than those achieved with conventional dispersing methods of graphene or CNTs in epoxy resins were obtained. The characterisation was complemented with a study of the structure at the microscale by cross-sectional scanning electron microscopy (SEM) images and a thermogravimetric analysis (TGA). The films are preconditioned in order to incorporate them into the composites, and the complete manufacturing process proposed allows the production and ...