EXPERIMENTAL PLAN BASED ON THE RANDOMIZED COMPLETE BLOCK METHOD FOR THE DEVELOPMENT OF FLEXIBLE MATERIALS FOR ELECTROMAGNETIC ATTENUATION

The negative effects of continuous exposure to electromagnetic waves know a continuous growth on the last years because of new developments in electronics and mobile communication applications in different fields (medical, smart devices for IoT applications). There are some researches concluding that exposure to electromagnetic fields could affect the cells (PMBCs, T lymphocytes, B lymphocytes, NK cells and macrophages) of the immune system including cell proportion, cell cycle, apoptosis, destruction activity and cytokine content. Considering the negative effect of electromagnetic inference, it is necessary to develop advanced materials to attenuate electromagnetic waves to protect electronic equipment and humans. In this context, this paper presents an experimental plan based on completely randomized blocks (RCBD) for obtaining adequate textile coating for electromagnetic shielding applications taking into account the design of electromagnetic shielding devices should include the modelling of the attenuation phenomenon of electromagnetic waves using Schelkunoff and Calculation theories. The proposed experimental plan consists of experiments distributed in blocks, each block corresponding to the technology used. For each experimental block, the factors specific to the technology used (independent variables such as the metals used (Ni, Cu, graphite, Fe3O4, Ag, Zn), mass (M), air permeability (Pa), thickness (δ)) that could influence the response variable (electrical resistance (Rs)) have been taken into consideration.