Sustainable coatings based on core-shell pigments to enhance antibacterial and other beneficial paper properties / M. G. Mohamed in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1857-1866 Titre : Sustainable coatings based on core-shell pigments to enhance antibacterial and other beneficial paper properties Type de document : texte imprimé Auteurs : M. G. Mohamed, Auteur ; N. M. Ahmed, Auteur ; M. Samir, Auteur Année de publication : 2023 Article en page(s) : p. 1857-1866 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Chimie analytique Dioxyde de titane Fragmentation Papier -- Propriétés mécaniques Papier -- Propriétés optiques Papier -- Revêtements Papier et carton couché Pigments Talc Index. décimale : 667.9 Revêtements et enduits Résumé : Paper manufacturers are constantly looking for new methods to improve coated paper properties. Pigments are encountered in paper coatings to add new functions. For example, titanium dioxide (TiO2 ) and talc are considered among the best-known pigments used in paper coating and manufacturing due to their whiteness and other beneficial properties. Nevertheless, talc has a weak dispersion during which its particles agglomerate, and this disadvantage needs to be overcome before its application which means higher cost. Therefore, in this work, a core–shell technique is used to modify the talc surface and enhance its dispersion in order to promote its use in improving the properties of the paper. Core–shell pigments are composed of a thin shell of (nano- and micronized) titanium dioxide precipitated on talc particles. These prepared talc/TiO2 core–shell pigments were characterized using various techniques such as XRF, SEM, and TEM, and then they were incorporated in paper coatings to evaluate their effect on the different properties of the coated papers. The results showed that nano-talc/TiO2 with the obtained unique chemical and morphological structure has improved the physical, mechanical, and optical properties of the coated papers besides improving their antimicrobial activity, especially when compared to papers coated with micronized talc/TiO2. Note de contenu : - EXPERIMENTAL : Materials - Preparation of nano-TiO2/talc core–shell pigments - Preparation of micronized TiO2/talc core–shell pigments - Methods of instrumental analysis - Application of the prepared TiO2/talc core–shell pigments in paper coating - Antibacterial activity test for the prepared pigment - RESULTS AND DISCUSSION : Characterizations of the prepared pigments - Application of the prepared pigments in paper coatings - Mechanical properties - Antibacterial activity measurements - Surface structure of coated paper - Table 1 : XRF of prepared core–shell pigments - Table 2 : Antibacterial activity of the prepared coated paper samples DOI : https://doi.org/10.1007/s11998-023-00782-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00782-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40166 [article]

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