| 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 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 6 (11/2018) . - p. 1379-1390
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Enhancing coated paper mechanical properties via doping kaolin with ammonium molybdate in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)
