Adsorption characteristics of ionic and nonionic surfactants on hydrophobic pigment in aqueous medium / Hikmet Sis in COLORATION TECHNOLOGY, Vol. 128, N° 3 (2012)

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 3 (2012) . - p. 244-249 Titre : Adsorption characteristics of ionic and nonionic surfactants on hydrophobic pigment in aqueous medium Type de document : texte imprimé Auteurs : Hikmet Sis, Auteur ; Mustafa Birinci, Auteur Année de publication : 2012 Article en page(s) : p. 244-249 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Colorants -- Adsorption Hydrophobie Nonylphenol éthoxylates Oléate de sodium Phtalocyanine de cuivre Potentiel zeta Surfactants Index. décimale : 667.3 Teinture et impression des tissus Résumé : The current study is based on the investigation of the adsorption properties of ionic and nonionic surfactants on an organic hydrophobic pigment powder, namely, β-copper phthalocyanine, in aqueous medium. The nonionic surfactants, selected systematically to represent varying degrees of ethoxylation, are nonylphenol ethoxylates, whereas the ionic surfactant is sodium oleate, a carboxylate-type anionic reagent. The adsorption of surfactants was assessed qualitatively by surface analysis of powders, before and after the adsorption of the surfactants. The experimental results were explained by the structural and other properties of the surfactants and the surface properties of the pigment. The specific adsorption of surfactants on pigments was verified by zeta potential measurements, as they altered the zeta potential values to a great extent. Nonionic surfactants decreased the absolute value of the zeta potential of the powder; whereas anionic surfactant sodium oleate shifted the zeta potential to more negative values. On the one hand, Fourier Transform–infrared and X-ray diffraction examinations of the pigments did not show any noticeable evidence for surfactant untreated or treated copper phthalocyanine. On the other hand, thermal analysis (both thermogravimetric and differential thermal analysis) showed clear evidence of the surfactants on both pigments, as substantial changes in thermogravimetric curves were assessed. Note de contenu : - EXPERIMENTAL : Materials - Zeta potential measurements - RESULTS AND DISCUSSION : Zeta potential of copper phthalocyanine blue pigment - Interactions of surfactants and pigments DOI : 10.1111/j.1478-4408.2012.00369.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15128 [article]

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