Effect of solvents and dispersants on polyol synthesis of V–ZrSiO4 nanopigment stable suspension for ink application / Hossein Heydari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1243–1253 Titre : Effect of solvents and dispersants on polyol synthesis of V–ZrSiO4 nanopigment stable suspension for ink application Type de document : texte imprimé Auteurs : Hossein Heydari, Auteur ; Mardali Yousefpour, Auteur ; Esmaeil Emadoddin, Auteur ; Maryam Hosseini Zori, Auteur ; Mohsen Khajeh Aminian, Auteur Année de publication : 2020 Article en page(s) : p. 1243–1253 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Colorimétrie Dispersions et suspensions Encre Matériaux céramiques Nanoparticules Pigments Polymères -- Synthèse Polyols Revêtement de céramique Rhéologie solvants Index. décimale : 667.9 Revêtements et enduits Résumé : The polyol method was implemented to prepare stable V–ZrSiO4 suspensions as ceramic ink. It was shown how the rheology, surface tension, viscosity, and particle size of suspensions were affected by the length of polyol solvent and dispersants. The effect of ethylene glycols, diethylene glycol (DEG), triethylene glycol, and tetraethylene glycol as solvents, as well as polyvinylpyrrolidone (PVP) and cetyltrimethylammonium bromide as dispersants on the ink properties was investigated. The X-ray diffraction, Fourier-transform infrared (FTIR), electron microscopy (FESEM/TEM) and dynamic light scattering analyses were performed to characterize the features of nanopigments. Crystalline V–ZrSiO4 nanopigment was obtained at 1100°C by DEG solvent in the presence of PVP. The sizes of the resulting nanoparticles were in the range of 10–50 nm. The achieved suspensions were tested as ceramic inks on a tile, and the colorimetric CIELAB parameters were measured. The CIE L*a*b* values confirmed the blue color. The surface tension and viscosity of prepared ceramic ink, as well as microstructure of the annealed nanopigments, were in the range required for drop-on-demand inkjet printers. Note de contenu : - EXPERIMENTAL : Precursor and reagents - Experimental procedure - Techniques of characterization - RESULTS AND DISCUSSION : Synthesis and characterization of nanosuspensions - Structural evolution from suspension to V–ZrSiO4 nanopigments - Rheological and printability of suspensions - Microstructural characteristics of nanopigments - Stability of V–ZrSiO4 suspensions - Colorimetric results DOI : https://doi.org/10.1007/s11998-020-00343-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00343-2.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34570 [article]

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Microwave-assisted polyol synthesis of V–ZrSiO4 nanoparticles and its use as a blue ceramic pigment / Hossein Heydari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 5 (09/2022) . - p. 1595-1607 Titre : Microwave-assisted polyol synthesis of V–ZrSiO4 nanoparticles and its use as a blue ceramic pigment Type de document : texte imprimé Auteurs : Hossein Heydari, Auteur ; Mardali Yousefpour, Auteur ; Esmaeil Emadoddin, Auteur ; Maryam Hosseini Zori, Auteur ; Mohsen Khajeh Aminian, Auteur Année de publication : 2022 Article en page(s) : p. 1595-1607 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Bleu (couleur) Caractérisation Colorimétrie Dispersions et suspensions Matériaux céramiques Micro-ondes Pigments inorganiques Polymères -- Synthèse Polyols Zircon Le zircon est un minéral du groupe des silicates, sous-groupe des nésosilicates. De composition ZrSiO4, c'est un silicate de zirconium naturel. Ses cristaux font partie des pierres fines de la joaillerie. Le mot zircon proviendrait, soit de l'arabe zarqun (cinabre), soit du persan zargun (doré). On retrouve cette étymologie dans l'anglais jargoon, qui désigne des zircons de couleur claire. Les zircons jaunes à grenat sont appelés hyacinthes (du grec signifiant "jacinthe"). Les spécimens transparents sont utilisés en joaillerie pour des utilisations similaires à celles du diamant. Le terme de zircon est parfois utilisé à tort pour désigner la zircone, l'oxyde de zirconium de composition ZrO2. La zircone à l'état naturel (minéral baddeleyite (en)) est extraite industriellement pour servir de substitut peu onéreux au diamant. (Wikipedia) Index. décimale : 667.9 Revêtements et enduits Résumé : In this study, a microwave-assisted polyol technique was used to synthesize vanadium-containing nanopigments of ZrSiO4. The influence of microwave power (300–900 W) and irradiation time (60–120 s) on the purity, crystallinity, and particle size of the synthesized nanoparticles was studied. The resulting powder (synthesized and calcined) was investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). XRD analysis shows that the 300 W synthesized powder is composed of solid amorphous particles. The microwave power was increased to 900 W to convert all particles to crystalline nano-ZrSiO4. The experiment revealed the critical influence of irradiation time and microwave power on purity and crystallinity. The microwave effect can accelerate the reaction and the nucleation rate of ZrSiO4 at a lower reaction temperature. The nanoparticles obtained were tested as ceramic pigments, and the colorimetric parameters of CIELab were measured. Structure and colorimetric studies have confirmed that a fully crystalline zircon phase can be obtained at 1100°C and can be used as a blue pigment. Note de contenu : - EXPERIMENTAL PROCEDURE : Precursor and reagents - Preparation of suspensions - Techniques of characterization - RESULTS AND DISCUSSION : Synthesis and characterization of suspensions - Effect of microwave power and irradiation time on crystallinity - Microstructure investigation - Colorimetric results - Table 1 : Sample preparation conditions for different microwave power and irradiation time in EG solvent - Table 2 : CIELab values of the glazes provided by pigments calcined at 1100°C DOI : https://doi.org/10.1007/s11998-022-00632-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00632-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38292 [article]

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