Matériaux nanocomposites sur supports céramiques pour l'assainissement de l'air intérieur (Nanocomposite materials developed using ceramics supports for the indoor air sanitation) [article]

Aliénor Dutheil de la Rochère, Alexei Evstratov, José-Marie lopez-Cuesta
2020 Zenodo  
In developed countries, people spend more than 85% of their time in enclosed areas. Yet, air can carry pathogenic microorganisms such as Mycobacterium tuberculosis or Legionella pneumophila. In this context, the microbiologic quality of indoor air is an issue of common interest. Air treatment technologies for the microbial disinfection of indoor air exist already. However, in most cases, the proposed solutions require external energy inputs and some of them produce harmful compounds (nanoscale
more » ... owders, ozone, etc.) when used. Therefore, the main goal of this thesis was to develop new antimicrobial materials for the disinfection of indoor air. These materials have to be energetically autonomous and function without any complementary energetic assistance; no harmful compounds must be released in the treated gas flows. To achieve this goal, the current research was focused on functionalizing of the surfaces of macroscopic alumina beads. Several compounds have been studied as active components of germicidal composites: manganese dioxide for its oxidizing properties, zinc oxide for its crystalline structure allowing the synthesis of microscale blades for the mechanical disruption of microorganisms and silver for its well-known antimicrobial ability. To assess the germicidal properties of these new materials, new test units have been designed. In particular, this thesis explored the use of tests units working in dynamic conditions with ambient air to evaluate the germicidal ability of materials in life-like conditions.
doi:10.5281/zenodo.3686077 fatcat:cooxp5haujejxac4nu2n3fjgr4