Graphene EMI Shielding: Introduction and Market News - Page 4

The UK based Perpetuus Carbon, producer and global supplier of high quality functionalized graphene, signed a preliminary agreement to achieve full commercial partnership and manufacturing agreement with G24 Power, a leading dye sensitized solar cell (DSSC) company from the UK.

Perpetuus is to provide functionalized graphene, in sheet or roll form, for G24’s production of a range of advanced graphene-enabled components. G24 reportedly has manufacturing capabilities of thousands of metres of components per month for use in areas like resistance heating, biosensor platforms, barrier packaging, composite physical reinforcements, water treatment, fuel cell membranes, thermal management and heat dissipation, EMI shielding, electrodes for batteries and supercapacitors and LI-AIR battery cathodes.

Researchers from India's VIT University developed new a basic nanocomposite material for naval/marine application devices. This material is anti-corrosive and is a high-performance functional device, which the researchers say suits the requirements for applications for marine and naval conditions (humidity, temperature, etc).

The material is a graphene-oxide reinforced/conjugated polymer nanocomposite. A PEDO-block-PEG polymer was used as a host medium, with graphene-oxide as a modifier and PVDF as crosslinker. The researchers say this is a novel composite that exhibits high performance in structure, thermal, morphology and electrical properties.

Back in October, researchers from India's VIT University started to study a new composite material made from graphene oxide and PVC. The GO was found to enhance the PVC to make it useful for battery electrodes, membranes and coatings.

The researchers continued to study the material, and they now published an article regarding the electrical characterization of the PVC-GO material as function of temperature. They say that according to their findings, the new material be very useful for all sorts of EMI applications, including radiation shields for radar and communication towers.

Garmor announced a few days ago that it will begin to start producing graphene oxide flakes next month using its low-cost environmentally-friendly production process. Sean Christiansen, Garmor's VP of engineering has been kind enough to answer a few question regarding the company's business and technology.

Dr. Christiansen received his Ph.D. in chemical engineering from the University of California at Santa Barbara in 2001. Since then he worked in several companies, helping them to commercialize new innovations in high technology industries.

Turkey's Grafen Chemical Industries has selected Angstron Materials to supply them with graphene materails for a polymer nanocomposite application for electromagnetic shielding material.

Grafen will buy both pristine and oxidized graphene products from Angstron and plans to commercialize the EMI product for full-scale production.

Researchers from Korea have shown that single-layer graphene is an excellent high-performance electromagnetic interference (EMI) shield. They used CVD-synthesized graphene, and have found that it features seven times greater EMI shielding effectiveness (in terms of dB) than gold film of the same thickness.

The researchers say that an ideal single-layer graphene can shield as much as 97.8% of incident waves (!) - the most effective material in terms of effectiveness per mass. The actual graphene sheet they used shielded about 40% of incident waves.

Angstron Materials announced that they have been awarded a $1.494 million project to develop processes for mass-producing chemically modified (functionalized) Nano Graphene Platelets (NGP) for a nearly limitless number of applications in the aerospace, energy, defense, automotive and telecommunications markets. Angstron was selected for the award by the U.S. Commerce Department’s National Institute of Standards and Technology (NIST).

Angstron developed NGPs as an alternative to carbon nanotubes, which are difficult to disperse in plastic and often have purity issues—not to mention the cost factor. NGPs have been shown to have striking material properties; among other things, it has the highest intrinsic strength and the highest thermal conductivity of all existing materials as well as exceptional in-plane electrical conductivity (up to ~ 20,000 S/cm)and electron mobility that is 100 times faster than silicon.