Carbon nanomaterials are of great interest for next generation nanofluids. nanotubes and graphene are, in particular, highly thermally conductive their use as thermal fluid is gaining momentum among the research community. This work investigates performance nanoplatelet (GnP)-nanofluid multi-walled carbon nanotube (MWCNT)-nanofluid by using a concentric pipe heat exchanger. The prepared nanoflu...

The aim of this study is to produce highly dense Si3N4 based composites with good mechanical properties and bioactivity. ceramics without using sintering aids, Si3N4-HA Si3N4-HA-GNP have been produced by spark plasma (SPS) at temperatures 1525–1550°C. effect reinforcement type content on the densification behavior, phase analysis, microstructural development, properties, in-vitro bioactivity be...

in this research, graphene was synthesized by chemical vapor deposition (cvd) method in atmosphere pressure (14.7 psi). different functionalization method was used for oxidizing of graphene such as acid and alkaline treatments. the functionalized graphene (fg) was characterized by ftir and raman spectroscopy. nanofluid with water and different concentration (0.05, 0.15 and 0.25 wt %) of fg were...

in this study, an efficient and facile technique for preparing graphene oxide in suspension and powder forms was presented based on a modification on hummers' method followed by an additional ultrasonic process. the method involved the provision of graphene oxide from graphite by reaction of potassium permanganate and sulfuric acid with stabilizing the medium complex. furthermore, this stu...

Nanomaterial usage is an effective method to enhance the mechanical and durability properties of cementitious materials. Graphene Nanoplatelets (GNPs) are cost-efficient graphene-based nanomaterials that can exhibit graphene-like features. Although GNPs have been found improve properties, their effect on self-healing behavior materials, particularly Engineered Cementitious Composites (ECC), has...

The use of graphene and other carbon nanoparticles is now interest for developing chemical (gas compounds detectors) physical sensors. In this work, a nanoplatelet (GNP)-PDMS sensor proposed. More specifically, its strain-sensing capabilities under consecutive cycles as well the crack propagation mechanisms are widely analyzed. First, an analysis electrical properties shows that increase GNP co...

The interaction of two types fragmented graphene particles (30–160 nm) with human macrophages is studied. Since have significant phagocytic activity, the incorporation into cells has an effect on response to functional polarization stimuli, favoring anti-inflammatory profile. Incubation foam particles, prepared by chemical vapor deposition, and commercially available nanoplatelet does not affec...