Publications by authors named "George Maistros"
Article Synopsis
- This investigation examines how electrochemical impedance spectroscopy (EIS) can be used to evaluate the physical and structural properties of graphene-based cement nanocomposites, particularly focusing on electrical resistivity, porosity, and fracture toughness.
- EIS was applied to cement mixtures with varying amounts of graphene nanoplatelets, and findings revealed that electrical resistivity decreased as xGnP content increased, stabilizing at higher concentrations.
- The study found a correlation between fracture toughness and electrical resistivity, highlighting EIS as an effective non-destructive method for assessing the mechanical properties of these advanced materials.
Article Synopsis
- Carbon-based nanomaterials (CBNs) like graphene and carbon nanotubes have superior properties that make them useful in various applications, particularly in cementitious materials.
- A new method using electrical impedance spectroscopy (EIS) with an impedance sensor has been proposed to quickly evaluate and quantify graphene oxide (GO) dispersions, addressing the lack of established characterization protocols.
- The study found that optimal GO concentration (around 0.15 wt%) facilitates better dispersion and conductivity when ultrasonicated at specific energy levels (30 to 65 kJ), making the method valuable for in-field applications in construction.
The main scope of this work is to develop nano-carbon-based mixed matrix cellulose acetate membranes (MMMs) for the potential use in both gas and liquid separation processes. For this purpose, a variety of mixed matrix membranes, consisting of cellulose acetate (CA) polymer and carbon nanotubes as additive material were prepared, characterized, and tested. Multi-walled carbon nanotubes (MWCNTs) were used as filler material and diacetone alcohol (DAA) as solvent.
View Article and Find Full Text PDF