Hybrid system to develop transparent and conductive ink

International audienceNowadays, conductive and transparent materials are limited. The main material is In-dium Tin Oxide (ITO). Despites their excellent property in terms of transparency and con-ductivity, ITO is brittle and not easily processable to produce patterns for radio-frequencies applications for example. To answer this problematic, we propose in this study a new solution with an ink, formulated with nanocellulose and a conductive material, for screen-printing application. The oxidized cellulose nanofibrils used have multiple roles: i) as a transparent matrix with adapted rheological properties, ii) as an adhesion link between the substrate and the silver nanowire iii) as a dispersing agent to favor the nanostructured network of the conductive material. The hybrid system has been characterized by AFM, SEM-FEG, rheometer and the final antenna by anechoic chamber. The ink developed present new results with a high conductivity (Rs70% @550nm) by keeping adapted rheology properties (G’ and G”). These results allow printing of conductive and transparent pattern usefull for various applications