dispersion – Page 2 – TechConnect Briefs

In-Situ Synthesis of Hydrazine in Graphene Oxide Suspension and Stable Dispersion of Spontaneously Reduced Graphene Oxide Assisted by Hexamethyldisilazane

Han J.T., Jang J.I., Jeong B.H., Jeong H.J., Jeong S.Y., Jeong B.H., Jeong H.J., Jeong S.Y., Jeong B.H., Jeong H.J., Jeong S.Y., Lee G.W., Korea Electrotechnology Research Institute, KR

The development of the efficient and environmental-friendly reduction method of graphene oxide (GO) in solution is one of challenges. Here we show the environmetally friendly reduction and a solution processability of chemically modified graphene nanoplatelets [...]

Low frequencies anomalies in GaAs FETs

Iqbal M.A., University of the Punjab, PK

The activation energy and capture cross section of the traps founds in GaAs field Effect transistors (GaAs FETS) have been measured both in ohmic and saturation region. A variety of transients found using frequency dispersion, [...]

Overcoming the Achilles’ Heel of Processing of Polymer Nanocomposites: Achieving Well-Dispersed Polymer-Graphite, Polymer-Carbon Nanotube, and Polymer-Graphene Nanocomposites with Major Property Enhancements by Solid-State Shear Pulverization

Torkelson J.M., Brunner P.J., Kane N., Northwestern University, US

Polymer nanocomposites, particularly with carbon-based nanofiller, hold promise for large-scale, commercial application of novel materials with enhanced, tunable properties. Unfortunately, a stumbling block in achieving this goal on a commercial scale is the remarkable difficulty [...]

Preparation Routes to Aqueous Graphene Dispersions and Their Influence on Electrical Conductivity of Polymer Composites

Ghislandi M., Tkalya E., Alekseev A., Koning C.E., de With G., TU/e, NL

In this work, starting from graphite, we produced graphene dispersed in water following the two main chemical conversion approaches and a physical conversion via ultrasonic exfoliation. Subsequently, graphene /polystyrene (PS) composites were prepared using the [...]

Dispersion of chemically-modified graphene and its applications

Han J.T., Kim J-S, Kim S-H, Kim J-S, Kim S-H, Jeong H.J., Jeong S.Y., Jeong H.J., Jeong S.Y., Lee G.W., Korea Electrotechnology Research Institute, KR

In this study, we present straightforward methods to produce large-area GO sheets with fewer defects on the basal plane and for addressing the problems associated with dispersing reduced GO nanosheets in organic solvents for applications. [...]

In-situ structural characterization of SWCNTs for probing the polymer/nanorod interactions

Liu T., Florida State University, US

Quantitative characterization of the structures of single-walled carbon nanotubes (SWCNTs) in the dispersion is important. It provides critical information for quality assurance of SWCNT dispersions, and more importantly for understanding and optimizing the properties and [...]

Calculation of Nanoparticle Filler Content in Solid or Liquid Dispersions

Khalfin R.L., Cohen Y., Technion – Israel Institute of Technology, IL

Nano composites have unique properties which depend to a large extent on the quality of the nanoparticle dispersion. An outstanding issue is the quantitative measure of fillers that are actually dispersed to dimensions below a [...]

Biomimetic High Filler Content Composites using Bisphenol-A Ethoxy Diacrylate

Daud N., Shanks R.A., RMIT University, AU

Materials were prepared similar to nacre with its layered structure of high filler content. Nacre is based upon about 95 %·w/w calcium carbonate as a composite with a layered block structure. Nacre has high modulus, [...]

Novel Chemistry and Dispersive Techniques for Diverse Applications

Hladik M., Brewer Science, US

Carbon nanotubes (CNTs) do not disperse very easily in organic media or at low viscosities. Thus, to produce a nanomaterial coating that can be applied by various methods, such as screen printing or ink-jet printing, [...]

Influence of multiwall carbon nanotubes in mechanical properties of E-glass/epoxy resin/jeffamine-D400 composites

Khoshgoftar M.J., Liaghat G.H., Tarbiat Modares University, IR

Polymer nanocomposites reinforced with carbon nanotubes have attracted recently. The properties of nanocomposites depend greatly on the chemistry of polymer matrices, nature of nanofillers and the way in which they are prepared. Properties of epoxy [...]