Effect of ink formulation on the inkjet printing process of Al–ZnO nanoparticles / Olga Shavdina in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 591-600 Titre : Effect of ink formulation on the inkjet printing process of Al–ZnO nanoparticles Type de document : texte imprimé Auteurs : Olga Shavdina, Auteur ; Céline Grillot, Auteur ; Fabien Giovannelli, Auteur ; Valêrie Bertagna, Auteur ; Jimmy Nicolle, Auteur ; Christine Vautrin-Ul, Auteur ; Chantal Boulmer-Leborgne, Auteur ; Nadjib Semmar, Auteur Année de publication : 2021 Article en page(s) : p. 591-600 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Encre Formulation (Génie chimique) Impression jet d'encre Nanoparticules Oxyde de zinc Index. décimale : 667.9 Revêtements et enduits Résumé : This study focuses on the inkjet printing of aluminum-doped zinc oxide (AZO) spherical and platelet nanoparticle-based nanoflakes with typical sizes ranging from 700 to 800 nm. The AZO nanoparticles were synthesized by aqueous precipitation. The preparation of the solvent-based inks was performed with the control of the viscosity, ink stability, and nanoparticle dispersion. The results showed that the viscosity for nanoparticle dispersions slightly changes (from 6.9 to 8.7 cPs) when the nanoparticles mass concentration increases from 1.8 to 10%. In order to achieve thin films of AZO nanoparticles, we optimized the printing process by real-time monitoring of drop velocity with a stroboscopic camera. This technology involves direct patterning of a functional material by tiny MEMS-jets on a flexible and rigid substrate at specific locations. The lowest concentration of AZO nanoparticles corresponding to 1.8% enables printing several times during the nanoparticle dispersions and the clogging of printhead nozzles is less pronounced. In our conditions, the optimum voltage value is 25 V to achieve a drop velocity from 7 to 9 m/s. In the case of nanospheres with 10% of AZO nanoparticles, for a large dropspace (90 μm), the individual printed droplets appear as a sequence of linear dots. When the drop spacing decreases to 75 μm, isolated drops start to overlap and merge. Further decrease in the drop spacing eliminates scalloping and leads finally to a regular and continuous layer at 55 μm. Note de contenu : - MATERIALS AND METHODS : Synthesis of AZO nanoparticles - Ink formulation - Printing process - RESULTS AND DISCUSSION : Characterization of the ink properties - Optimization of the printing process - Table 1 : Detailed compositions of the AZO ink formulations. Ethanol and EG are mixed with different AZO concentrations - Table 2 : Viscosity values ν [cPs] for the different AZO loading at share rate corresponding to 30 rpm DOI : https://doi.org/10.1007/s11998-020-00427-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00427-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35618 [article]

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