Periodic Reporting for period 1 - GrInShield (TWINNING FOR NEW GRAPHENE-BASED COMPOSITES IN ELECTROMAGNETIC INTERFERENCE SHIELDING)
Période du rapport: 2022-11-01 au 2025-10-31
We are witnessing an increasing expansion of the telecommunications and electronic industries in recent years. As a consequence of the widespread use of electronic devices in daily life, we are constantly exposed to electromagnetic waves (EWs) as a pervasive form of pollution that is emitted from cell phones, Wi-Fi devices, microwave ovens, etc. Electromagnetic Interference (EMI) has a strong negative impact on both electrical devices and human health, and the danger of EMI is especially highlighted for those with implanted active medical devices. To fulfill the demand for an effective EW shielding material, the GrInShield project has started with the aim to bring innovation in the field of shielding materials by exploring new nanomaterials as a protective barrier. The goal of this project is twofold: to increase significantly the scientific excellence of the consortium by addressing a scientific issue with potential economic/industrial impact: producing efficient shielding material based on nanotechnology materials for EMI protection, and to improve the administrative skills of the coordinator institution from the widening country staff through collaboration with members of the consortium offices from France, Germany, and Slovenia. By collaborating with top-class partners, researchers from the widening country will develop their scientific expertise, gain access to cutting-edge tools and education, improve their project writing skills, increase their record of publications, and develop a competitive, dynamic, and effective administration for the planning and execution of international projects.
Within the project, 5 workshops, 3 summer schools, and 4 onsite trainings were organized. PhD students and young researchers (8) from the widening country attended 5 different courses at partner institutions. In total, 155 lectures were presented to 372 participants. In collaboration with 28 specialists from 15 organizations worldwide, the team prepared a comprehensive monograph (10 chapters/500 pages). Strengthening of research management capacity was achieved through: (1) education (WSs, training attendances), (2) meetings with the administrative staff of advanced partner institutions, and (3) active participation in the GrInShield project implementation. Templates for all projects and a documentation collecting system, summarized in the Project Implementation Handbook, were created.
The team was focused on graphene oxide (GO) and silver nanowires (AgNWs) for EMI shielding. To create protective, flexible, and durable materials, GO, AgNWs, and GO-AgNWs are incorporated into various polymers. Graphene-based composites are functionalized with textile fabrics to produce EMI protective clothes.
Biowaste from fruit processing was used in the production of graphene-based nanomaterials, gamma irradiation was employed to modify the graphene and structure, and doping with N-atoms was achieved. GO and reduced GO were incorporated in polymers: PMMA, PCL, PP, etc. Obtained composites are lightweight, flexible, up to 2 mm thickness, and with EMI SE up to 16.05 dB. By combining gamma irradiation and annealing in NH3, N-doped graphenes were produced and showed a remarkable EMI SE of 20.30 dB, which rich the value of 35 dB at some frequencies (10.5 GHz). Two types of cotton textiles were functionlized with GO, reduced GO, GO and AgNWs, and rare earth nanoparticles (RENPs) with the ability to block around 80% of incident waves in the wide frequency range (10-35 GHz).
The team was focused on graphene oxide (GO) and silver nanowires (AgNWs) for EMI shielding. To create protective, flexible, and durable materials, GO, AgNWs, and GO-AgNWs are incorporated into various polymers. Graphene-based composites are functionalized with textile fabrics to produce EMI protective clothes.
Biowaste from fruit processing was used in the production of graphene-based nanomaterials, gamma irradiation was employed to modify the graphene and structure, and doping with N-atoms was achieved. GO and reduced GO were incorporated in polymers: PMMA, PCL, PP, etc. Obtained composites are lightweight, flexible, up to 2 mm thickness, and with EMI SE up to 16.05 dB. By combining gamma irradiation and annealing in NH3, N-doped graphenes were produced and showed a remarkable EMI SE of 20.30 dB, which rich the value of 35 dB at some frequencies (10.5 GHz). Two types of cotton textiles were functionlized with GO, reduced GO, GO and AgNWs, and rare earth nanoparticles (RENPs) with the ability to block around 80% of incident waves in the wide frequency range (10-35 GHz).
The GrInShield team developed composites based on graphene, graphene oxides, metallic nano-objects (silver nanoparticles and nanowires, platinum nanoparticles, gold nanoparticles, rare earth nanoparticles), and graphene-based materials from biowaste, which efficiently block the propagation of non-ionizing irradiation in the frequency range from 0.5 to 35 GHz. Composites were produced in the form of powders, thin layers (up to 0.025 mm), and plastic foils with a thickness of several mm.
The team produced polymer-based composites with the ability to block electromagnetic waves (EMW) applicable for various devices.
Furthermore, the team developed functionalized textile fabrics, which are currently able to block 80% of incident waves in the 10-35 GHz frequency range.
By employing new experimental strategies in the modification of graphene oxides, such as gamma irradiation, the team achieved a shielding effectiveness of 26.90 dB.
The team produced polymer-based composites with the ability to block electromagnetic waves (EMW) applicable for various devices.
Furthermore, the team developed functionalized textile fabrics, which are currently able to block 80% of incident waves in the 10-35 GHz frequency range.
By employing new experimental strategies in the modification of graphene oxides, such as gamma irradiation, the team achieved a shielding effectiveness of 26.90 dB.