IR – TechConnect Briefs

Graphene oxide/vinyl ester resin nanocomposite: the effect of graphene oxide, curing kinetics, mechanical properties and thermal stability

Arabli V., Aghili A., Islamic Azad University, Shiraz, IR

Graphene oxide (GO) was synthesized and nanocomposite was achieved using different contents of the GO and Vinyl Ester Resin (VE). The suspension was sonicated in order to prevent the agglomeration. Non-isothermal differential scanning calorimetry (DSC) [...]

Graphene Oxide/Vinyl Ester Resin Nanocomposite: Effect of Graphene Oxide, Thermal Stability, and Modeling of the Curing Kinetics”

Arabli V., Aghili A., National Iranian Oil Company, IR

Graphene oxide (GO) was synthesized and nanocomposites were prepared using different contents of the GO and vinyl ester resin (VE). The onisothermal differential scanning calorimetry (DSC) was used to study the cure kinetics of VE [...]

Modeling the effect of the increase in the actuation voltage on the dynamic behavior of a RF MEMS switch

Jamshidzadeh M., Casals J., Assistant Professor, IR

Abstract—In the past few years many reports have demonstrated the development of RF-MEMS switches considering the mechanical, electrical and chemical behaviors separately. However there are a few works which address the whole aspects of RF-MEMS [...]

A fluorescent nanosensor base on magnetic silica nanoparticles as illicit drug vapor logic gate

Rouhani S., Institute for Color Science and technology, IR

Herein we report a fluorescent nanosensor base on magnetic silica nanoparticle as illicit drug logic gate. A novel naphthlimide derivative was synthesized (F) , characterized and doped into the magnetic silica nanoparticles (Fe3O4@SiO2-F). Herein we [...]

Preparation and characterization of porous polyethersulfone nanofiltrationmembranes via combined phase separation method for water desalination

Jahanbakhsh Asl H., Soltanieh M., Sharif University of Technology, IR

In this work combined thermally induced phase separation (TIPS) and nonsolvent induced phase separation (NIPS), were used to fabricate nanofiltration membranes for water desalination at low pressures. Polyethersulfone (PES) flat-sheet membranes were successfully prepared by [...]

Global Gas Flaring -The Energy Waste with Serious Environmental Impacts: Case Study of Iran

Soltanieh M., Zohrabian A., Gholipour M.J., Sharif University of Technology, IR

Gas flaring in oil production and oil and gas refining is a major environmental issue with great energy and economic loss. In this paper the global gas flaring and its adverse environmental impacts have been [...]

H2 purification with PVDF/GTA blended membranes

Rabiee H., Soltanieh M., Mousavi S.A., Ghadimi A., Sharif University of Technology, IR

In this study, poly(vinylidene fluoride) (PVDF) and Glycerol Triacetate (GTA) have been selected as the main blending materials in order to fabricate membranes with a high separation ability for CO2/H2. GTA as a plasticizer possesses [...]

A novel method for realization of nickel silicide nanosheets with advanced morphology and photoemission

Gharooni M., Hosseini M., Talei R., Taghinejad H., Taghinejad M., Taghinejad H., Taghinejad M., Mohajerzadeh S., Abdolahad M., University of Tehran, IR

Morphologically controlled nanostructures have been increasingly important, because of their highly shape dependent physical and chemical properties. Nickel-silicide nanomaterials, due to their wide range of applications, attracted strong attentions. There are some reports on fabrication [...]

Epoxy/Silica Nanocomposite: Effect of Silica Nanoparticles, Thermal Stability, and Modeling of the Curing Kinetics

Rahim Vaseghi M., Arabli V., Aghili A., Islamic Azad University, IR

A nanocomposite was synthesized using silica nanoparticles (SN) and Epoxy Vinyl Ester Resin (VE671). Nanoparticles were dispersed in the mixture by ultrasonic equipment to prevent the agglomeration. Transmission electron microscopy (TEM) was used to investigate [...]

Three-Dimensional High-order Nano-rod Formation Using a Hydrogen-assisted Deep Reactive Ion Etching

Soleimani S., Zanganeh S., Azimi S., Sanaee Z., Mohajerzadeh S., Taghinejad H., University of Tehran, IR

We report the formation of three-dimensional nano-sized vertical features on amorphous silicon by means of a hydrogen-assisted deep reactive ion etching. The thickness of amorphous silicon has been varied between 5 and 10 µm. The [...]