In situ fabrication and characterization of graphene/geopolymer composites
Source abstract
Abstract
Abstract Homogeneously dispersed graphene reinforced geopolymer composites were easily and simply prepared through in-situ reduction of graphene oxide (GO) in alkaline geopolymeric solutions. The in-situ GO reduction degree, microstructure and mechanical properties of reduced graphene oxide (rGO)/geopolymer composites were investigated systematically. The results revealed that the rGO C/O ratio increased dramatically after in situ reaction at 60 °C for 72 h in geopolymeric solutions. The reduction is mainly attributed to conversion of C=O to C–O bonds and then elimination of residual oxygen-function groups under the alkaline conditions. The as-obtained rGO was uniformly dispersed and exhibited good long-term stability in the geopolymeric solutions. The final amorphous geopolymer matrix structure was unaffected by the homogeneously dispersed rGO yet strong interfacial bonding was observed. As a result, the fracture toughness of the composite with 1 wt% rGO was improved by ~17% compared with the pristine geopolymer.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Graphene research and applications · Graphene and Nanomaterials Applications · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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