English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/12587
Título

Phase behavior and preparation of mesoporous silica in aqueous mixtures of fluorinated surfactant and hydrophobic fluorinated polymer

AutorSharma, Suraj Chandra; Kunieda, Hironobu; Esquena, Jordi; Rodríguez Abreu, Carlos
Palabras claveFluorinated surfactant
Polymeric oil
Phase behavior
Rheology
Mesoporous silica
Liquid crystals
Fecha de publicación1-jul-2006
EditorElsevier
CitaciónJournal of Colloid and Interface Science 299(1): 297-304 (2006)
ResumenThe phase behavior and formation of self-assemblies in the ternary water/fluorinated surfactant (C8F17EO10)/hydrophobic fluorinated polymer (C3F6O)nCOOH system and the application of those assemblies in the preparation of mesostructured silica have been investigated by means of phase study, small angle X-ray scattering, and rheology. Hexagonal (H1), bicontinuous cubic (V1) with Ia3d symmetry, and polymer rich lamellar () are observed in the ternary diagram. C8F17EO10 molecules are dissolved in polymer rich aggregates, whereas (C3F6O)nCOOH molecules are practically insoluble in the surfactant lamellar phase due to packing restrictions. Hence, two types of lamellar phases exist: one with surfactant rich (Lα) and the other with polymer rich () in the water/C8F17EO10/(C3F6O)nCOOH system. As suggested by rheological measurements, worm-like micelles are present in C8F17EO10 aqueous solutions but a rod-sphere transition takes place by solubilization of (C3F6O)nCOOH. C8F17EO10 acts as a structure directing agent for the preparation of hexagonal mesoporous silica by the precipitation method. The addition of (C3F6O)nCOOH induces the formation of larger but disordered pores.
Descripción8 pages, 10 figures.
Versión del editorhttp://dx.doi.org/10.1016/j.jcis.2006.01.040
URIhttp://hdl.handle.net/10261/12587
DOI10.1016/j.jcis.2006.01.040
ISSN0021-9797(Print)
1095-7103 (Online)
Aparece en las colecciones: (IQAC) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.