Aqueous Dispersions of Silica Stabilized with Oleic Acid Obtained by Green Chemistry
AbstractThe present study describes for the first time the synthesis of silica nanoparticles starting from sodium silicate and oleic acid (OLA). The interactions between OLA and sodium silicate require an optimal OLA/OLANa molar ratio able to generate vesicles that can stabilize silica particles obtained by the sol-gel process of sodium silicate. The optimal molar ratio of OLA/OLANa can be ensured by a proper selection of OLA and respectively of sodium silicate concentration. The titration of sodium silicate with OLA revealed a stabilization phenomenon of silica/OLA vesicles and the dependence between their average size and reagent’s molar ratio. Dynamic light scattering (DLS) and scanning electron microscopy (SEM) measurements emphasized the successful synthesis of silica nanoparticles starting from renewable materials, in mild condition of green chemistry. By grafting octadecyltrimethoxysilane on the initial silica particles, an increased interaction between silica particles and the OLA/OLANa complex was achieved. This interaction between the oleyl and octadecyl chains resulted in the formation of stable gel-like aqueous systems. Subsequently, olive oil and an oleophylic red dye were solubilized in these stable aqueous systems. This great dispersing capacity of oleosoluble compounds opens new perspectives for future green chemistry applications. After the removal of water and of the organic chains by thermal treatment, mesoporous silica was obtained. View Full-Text
- Supplementary File 1:
Supplementary (PDF, 164 KB)
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Nistor, C.L.; Ianchis, R.; Ghiurea, M.; Nicolae, C.-A.; Spataru, C.-I.; Culita, D.C.; Pandele Cusu, J.; Fruth, V.; Oancea, F.; Donescu, D. Aqueous Dispersions of Silica Stabilized with Oleic Acid Obtained by Green Chemistry. Nanomaterials 2016, 6, 9.
Nistor CL, Ianchis R, Ghiurea M, Nicolae C-A, Spataru C-I, Culita DC, Pandele Cusu J, Fruth V, Oancea F, Donescu D. Aqueous Dispersions of Silica Stabilized with Oleic Acid Obtained by Green Chemistry. Nanomaterials. 2016; 6(1):9.Chicago/Turabian Style
Nistor, Cristina L.; Ianchis, Raluca; Ghiurea, Marius; Nicolae, Cristian-Andi; Spataru, Catalin-Ilie; Culita, Daniela C.; Pandele Cusu, Jeanina; Fruth, Victor; Oancea, Florin; Donescu, Dan. 2016. "Aqueous Dispersions of Silica Stabilized with Oleic Acid Obtained by Green Chemistry." Nanomaterials 6, no. 1: 9.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.