Search results for " graphene nanoplatelets"

showing 3 items of 3 documents

Effect of Graphene Nanoplatelets on the Physical and Antimicrobial Properties of Biopolymer-Based Nanocomposites

2016

In this work, biopolymer-based nanocomposites with antimicrobial properties were prepared via melt-compounding. In particular, graphene nanoplatelets (GnPs) as fillers and an antibiotic, i.e., ciprofloxacin (CFX), as biocide were incorporated in a commercial biodegradable polymer blend of poly(lactic acid) (PLA) and a copolyester (BioFlex®). The prepared materials were characterized by scanning electron microscopy (SEM), and rheological and mechanical measurements. Moreover, the effect of GnPs on the antimicrobial properties and release kinetics of CFX was evaluated. The results indicated that the incorporation of GnPs increased the stiffness of the biopolymeric matrix and allowed for the t…

BiocideMaterials scienceScanning electron microscopeKineticsAntimicrobial activity; Ciprofloxacin; Drug release; Graphene nanoplatelets (GnPs); Nanocomposites; Poly(lactic acid) (PLA); Materials Science (all)02 engineering and technologyengineering.material010402 general chemistry01 natural scienceslcsh:TechnologyArticlepoly(lactic acid) (PLA)ciprofloxacinnanocompositesGeneral Materials ScienceComposite materiallcsh:Microscopydrug releaselcsh:QC120-168.85NanocompositeNanocompositeantimicrobial activitylcsh:QH201-278.5lcsh:T021001 nanoscience & nanotechnologyAntimicrobialBiodegradable polymerCopolyestergraphene nanoplatelets (GnPs)0104 chemical sciencesChemical engineeringnanocomposites; graphene nanoplatelets (GnPs); poly(lactic acid) (PLA); antimicrobial activity; drug release; ciprofloxacinlcsh:TA1-2040engineeringlcsh:Descriptive and experimental mechanicsMaterials Science (all)Biopolymerlcsh:Electrical engineering. Electronics. Nuclear engineering0210 nano-technologylcsh:Engineering (General). Civil engineering (General)lcsh:TK1-9971Materials; Volume 9; Issue 5; Pages: 351
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Bottom-up realization and electrical characterization of a graphene-based device.

2016

We propose a bottom-up procedure to fabricate an easy-to-engineer graphene-based device, consisting of a microstrip-like circuit where few-layer graphene nanoplatelets are used to contact two copper electrodes. The graphene nanoplatelets are obtained by the microwave irradiation of intercalated graphite, i.e., an environmentally friendly, fast and low-cost procedure. The contact is created by a bottom-up process, driven by the application of a DC electrical field in the gap between the electrodes, yielding the formation of a graphene carpet. The electrical resistance of the device has been measured as a function of the gap length and device temperature. The possible use of this device as a …

Materials scienceFabricationNanotechnologyBioengineering02 engineering and technology01 natural scienceslaw.inventionbottom-upnanoelectronicsElectrical resistance and conductancegraphene devicelaw0103 physical sciencesGeneral Materials ScienceMechanics of MaterialGraphitegraphene device graphene nanoplatelets nanoelectronics bottom-upElectrical and Electronic EngineeringnanoelectronicGraphene oxide paper010302 applied physicsGrapheneMechanical EngineeringGraphene foamgraphene nanoplateletsChemistry (all)General Chemistry021001 nanoscience & nanotechnologygraphene nanoplateletMechanics of MaterialsElectrodeMaterials Science (all)0210 nano-technologyGraphene nanoribbonsNanotechnology
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Reprocessing of PLA/graphene nanoplatelets nanocomposites

2017

This work reports a study on the effect of multiple reprocessing on the properties of poly(lactic acid) (PLA) filled with graphene nanoplatelets (GnP) compared to the melt reprocessed neat polymeric matrix. In particular, morphological, X-Ray Diffraction and Micro-Raman analyses, intrinsic viscosity measurements, thermal, rheological and mechanical tests were carried out on materials reprocessed up five times by means of a single screw extruder. The results indicated that the presence of GnP decreased the degradation rate as a function of the reprocessing cycles in comparison with the neat PLA that, on the contrary, showed a more drastic reduction of the molecular weight. Moreover, the repr…

Materials sciencePolymers and PlasticsIntrinsic viscosityPlastics extrusion02 engineering and technology010402 general chemistry01 natural sciencesArticlePoly(lactic acid) (PLA)lcsh:QD241-441Exfoliated graphite nano-plateletsRheologylcsh:Organic chemistrynanocompositesGraphene nanoplatelets (GnP)RecyclingNanocompositeNanocompositerecycling; nanocomposites; graphene nanoplatelets (GnP); poly(lactic acid) (PLA)General Chemistry021001 nanoscience & nanotechnology0104 chemical sciencesSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiChemical engineeringGraphene nanoplatelets (GnP); Nanocomposites; Poly(lactic acid) (PLA); RecyclingParticleDegradation (geology)0210 nano-technologyDispersion (chemistry)
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