Enhancing coated paper mechanical properties via doping kaolin with ammonium molybdate / Samya El-Sherbiny in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 6 (11/2018) . - p. 1379-1390 Titre : Enhancing coated paper mechanical properties via doping kaolin with ammonium molybdate Type de document : texte imprimé Auteurs : Samya El-Sherbiny, Auteur ; Nivin M. Ahmed, Auteur Année de publication : 2018 Article en page(s) : p. 1379-1390 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Kaolin Molybdate d'ammonium Papier -- Propriétés mécaniques Papier et carton couché Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Mechanical properties of paper coating layers are very important in converting and printing operations. Kaolin is commonly used in paper coating as cheap pigment in addition to its superior properties. In this study, a new approach for improving coated paper mechanical properties using doped kaolin with ammonium molybdate was presented. Kaolin and modified kaolin were characterized using several analyses tools (e.g., XRD, SEM, and EDX), and then they were applied in paper coating mixture. The results revealed that the dopant was found in the kaolin as MoOx; this oxide form with its needle shapes led to change in the kaolin crystals, and its presence in high concentrations led to exfoliation of kaolin. Also, at high concentration it was found that MoOx reacted with γ-alumina that is found in kaolin after its heating at 300°C to form aluminum molybdate. It can be observed that modified kaolin increased the coated paper porosity and consequently the opacity; also bulk and thickness were increased. Significant improvement in coated paper tensile strength, bursting strength, tensile energy absorption, and bending stiffness was also noticed. Thermal study also showed that increasing the concentration of ammonium molybdate increased the heat stability of the coated paper. Note de contenu : - EXPERIMENTAL : Materials - Chemical treatment of kaolin - Preparation of coating mixture - Preparation of coated paper samples - Characterization fo the treated kaolin and coated paper samples - RESULTS AND DISCUSSION : Characterization of unmodified kaolin and modified kaolin - Coated paper properties - Thermal analysis of coated paper DOI : 10.1007/s11998-016-9903-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9903-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31355 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
20388	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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