Dispersion stability enhancement of titania nanoparticles in organic solvent using a bead mill process / I Made Joni in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 6916–6922 Titre : Dispersion stability enhancement of titania nanoparticles in organic solvent using a bead mill process Type de document : texte imprimé Auteurs : I Made Joni, Auteur ; Agus Purwanto, Auteur ; Ferry Iskandar, Auteur Année de publication : 2009 Article en page(s) : pp. 6916–6922 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Titania nanoparticles Stable dispersion Organic solvent Diglyme Bead milling process Résumé : A stable dispersion of titania nanoparticles (primary size 15 nm) in an organic solvent of diethylene glycol dimethylether (diglyme) was successfully prepared using a bead milling process. In order to enhance dispersion stability of the solution, surface modification of dispersed titania particles was carried out during the centrifugal bead mill process. Surface modification was utilized with silane coupling agents, (3-acryl-oxypropyl)trimethoxysilane and trimethoxypropylsilane. The effects of surface modification at selected milling times on the morphology, mean particle size distribution, and degree of dispersion stability by means of zeta potential were investigated. The effect of titania concentration (1 wt %, 5 wt %, and 10 wt %) on the optical transmission properties was also examined. Finally, a solution with a high degree of dispersion stability with zeta potential up to 80 mV was obtained. The achievement of a decrease in average particle size to approximately the primary size of 15 nm and high dispersion stability has improved solution optical transparency at a corresponding concentration of titania particles. Surface-modified nanoparticles sustained their UV filter properties as desired in titania-based composites for optical applications. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801812f [article] Dispersion stability enhancement of titania nanoparticles in organic solvent using a bead mill process [texte imprimé] / I Made Joni, Auteur ; Agus Purwanto, Auteur ; Ferry Iskandar, Auteur . - 2009 . - pp. 6916–6922. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 6916–6922 Mots-clés : Titania nanoparticles Stable dispersion Organic solvent Diglyme Bead milling process Résumé : A stable dispersion of titania nanoparticles (primary size 15 nm) in an organic solvent of diethylene glycol dimethylether (diglyme) was successfully prepared using a bead milling process. In order to enhance dispersion stability of the solution, surface modification of dispersed titania particles was carried out during the centrifugal bead mill process. Surface modification was utilized with silane coupling agents, (3-acryl-oxypropyl)trimethoxysilane and trimethoxypropylsilane. The effects of surface modification at selected milling times on the morphology, mean particle size distribution, and degree of dispersion stability by means of zeta potential were investigated. The effect of titania concentration (1 wt %, 5 wt %, and 10 wt %) on the optical transmission properties was also examined. Finally, a solution with a high degree of dispersion stability with zeta potential up to 80 mV was obtained. The achievement of a decrease in average particle size to approximately the primary size of 15 nm and high dispersion stability has improved solution optical transparency at a corresponding concentration of titania particles. Surface-modified nanoparticles sustained their UV filter properties as desired in titania-based composites for optical applications. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801812f

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