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Colloid and Polymer Science
Erschienen in: Colloid and Polymer Science 5/2017

06.04.2017 | Original Contribution

A simplified synthesis of silica Colloids with tunable hydrophobicity

verfasst von: Maliheh Dargahi-Zaboli, Eghbal Sahraei, Behzad Pourabbas, Brian A. Korgel

Erschienen in: Colloid and Polymer Science | Ausgabe 5/2017

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Abstract

Colloidal silica nanoparticles with average diameters less than 100 nm were made using a modified Stöber method involving tetraethylorthosilicate (TEOS) and octadecyl trimethoxysilane (OTMOS) as a surface modifier. We show that the hydrophobicity of the nanoparticles could be tuned in this one-step reaction by introducing methanol as a co-solvent with ethanol and optimizing the ammonium hydroxide concentration and time elapsed between TEOS and OTMOS addition. Using this approach, silica nanoparticles could be made directly with the proper surface hydrophobicity to stabilize invert (water-in-oil) emulsions with shear-thinning rheological behavior as needed in oil drilling applications. Particle characterization data from transmission and scanning electron microscopy (TEM and SEM), Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), and contact angle measurements are presented.
Vorheriger Artikel Influence of the amphiphilicity profile of copolymers on the formation of liquid crystalline mesophases in microemulsions
Nächster Artikel Hydrothermal synthesis of Cr-doped SrTiO3 nanoparticles for rhodamine-B dye degradation under visible light illumination

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Metadaten
Titel
A simplified synthesis of silica Colloids with tunable hydrophobicity
verfasst von
Maliheh Dargahi-Zaboli
Eghbal Sahraei
Behzad Pourabbas
Brian A. Korgel
Publikationsdatum
06.04.2017
Verlag
Springer Berlin Heidelberg
Erschienen in
Colloid and Polymer Science / Ausgabe 5/2017
Print ISSN: 0303-402X
Elektronische ISSN: 1435-1536
DOI
https://doi.org/10.1007/s00396-017-4079-8

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