Universita' Degli Studi Di Roma &#x201c;la Sapienza&#x201d;

Università Degli Studi Di Roma "la Sapienza"

Università Degli Studi Di Perugia

Giovanni De Bellis

Maria Sabrina Sarto

Alessio Tamburrano

Alessandro Giuseppe D'Aloia

Antonella Polimeni

Hossein Cheraghi Bidsorkhi

Lavanya Rani Ballam

Daniela Uccelletti

Chandrakanth Reddy Chandraiahgari

Irene Bellagamba

Elena Zanni

Erika Bruni

Maurizio Bossu′

Maria Paola Bracciale

Alessandra Broggi

Assunta Marrocchi

Maria Laura Santarelli

A measurement method () of the electric permittivity (ε) at 0 Hz of a substance (), irrespective of the aggregation state, comprising the steps of: pre-arranging () a rheometer () comprising an electrorheology module (), provided with a fixed first plate () and said movable second plate (); connecting () a voltage generator () to said rheometer (); placing () the substance () between said first plate () and said second plate (); arranging () said second plate () at a distance (D) from said first plate (); imposing () said potential difference (ΔV) at 0 Hz between said first plate () and said second plate (); measuring () a normal force (F) to which said second plate () is subjected; converting () the normal force (F) to obtain the dielectric permittivity (ε) of the substance ().

Measurement system and method of electric permittivity at 0 hz

A multi-layer coating with antibacterial and anti-COVID properties which is usable in various environments, including hospitals, and which can be easily deposited by spraying on different surfaces and capable of providing an effective removable barrier against pathogens and bacteria, which waterproof coating is characterized in that it uses graphene nanoparticles as an antibacterial and anti-COVID agent deposited by spraying a polymer material as a host layer on the surface to promote the dispersion and uniform surface distribution thereof, the polymer material being directly adhered by spraying to the surface to be coated or sprayed on a second polymer, in turn sprayed on the surface to be coated, which is used as an element to promote the adhesion of the first polymer forming the antibacterial and anti-COVID coating to the surface to be coated.

Removable, waterproof multi-layer coating having antibacterial properties for contact surfaces and method for the preparation thereof

A process for producing GNP-based polymeric nanocomposites for electromagnetic applications such as shielding and/or absorption of the energy associated to electromagnetic fields envisages a plurality of steps that include: controlled synthesis, for optimizing the morphological and electrical properties thereof, of graphene nanoplatelets (GNPs) to be used as nanofillers in a polymeric matrix; selection of the polymeric matrix so as to optimize its chemical compatibility with the type of GNPs thus obtained; production via the solution-processing technique of GNP-based polymeric nanocomposites with dielectric permittivity and electric conductivity controlled and predictable via the equivalent-effective-medium model by calibrating the parameters of the model for the specific type of polymeric matrix and GNPs used.

Graphene nanoplatelets- or graphite nanoplatelets-based nanocomposites for reducing electromagnetic interferences

Growing community of inventors

Rome, Italy

Giovanni De Bellis