| Titre : |
Water resistance improvement of paperboard by coating formulations based on nanoscale pigments |
| Type de document : |
texte imprimé |
| Auteurs : |
Wasin Thitsartarn, Auteur ; Tunyarut Jinkarn, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 1609-1617 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Cartonnages -- Propriétés mécaniques
Emballages
Enrobage (technologie)
Formulation (Génie chimique)
Hydrophobie
Kaolin
Morphologie (matériaux)
Nanoparticules
Papier et carton couché
Pigments
Résistance à l'humidité:Résistance à l'eau
Rugosité
Surfaces (Physique)
Surfaces -- Analyse
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This research assessed how type, particle size, and concentration of pigment in coating formulations influenced water and water vapor barriers of paperboard packaging. Calcium carbonate (CaCO3) and kaolin of micro- and nanosize of 1 and 0.05 µm, respectively, were added to 3% (w/v) gelatinized cassava starch to prepare coating formulations with different pigment concentrations of 5, 15, and 25% (w/v). These were applied on paperboard surfaces using the rod coating technique. Results showed that water resistance of paperboard, evaluated by contact angle (CA) and water absorptiveness (Cobb) were strongly influenced by pigment type (chemistry), particle size and shape, and pigment concentration (coating layer thickness). A hydrophobic surface (CA > 100) was obtained only for the nano-CaCO3 formulation with 25% (w/v) by combined effects of the nanosize scale, the spherical shape, and the hydrophobic surface of CaCO3 particulates. Kaolin nanoparticle coatings produced hydrophilic surfaces (CA ~ 90) with high water absorptiveness, while high concentrations of kaolin microparticle coating slightly improved water and water vapor barriers by compact arrangement of flattened particles. Mechanical strength properties of the paperboard were not significantly affected by coatings, but surface cracking was observed for large particle size or at high pigment concentration due to the increase in pigment/starch ratio. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Coating formulation preparation - Coating process and conditioning - Physical properties and surface characterization - Water resistance and water vapor analysis - Mechanical property measurement
- RESULTS AND DISCUSSION : Coating weight and coating layer thickness - Surface roughness and morphology - Water resistance and water vapor barrier - Mechanical property analysis |
| DOI : |
https://doi.org/10.1007/s11998-020-00386-5 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-020-00386-5.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34964 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 6 (11/2020) . - p. 1609-1617
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Water resistance improvement of paperboard by coating formulations based on nanoscale pigments in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 6 (11/2020)
