Submicrometer-Sized Pickering Emulsions Stabilized by Silica Nanoparticles with Adsorbed Oleic Acid

Langmuir ◽  
2013 ◽  
Vol 29 (20) ◽  
pp. 6004-6012 ◽  
Author(s):  
Amin Sadeghpour ◽  
Franz Pirolt ◽  
Otto Glatter
Keyword(s):  
Oleic Acid ◽  
Silica Nanoparticles ◽  
Pickering Emulsions

Acidic/amphiphilic silica nanoparticles: new eco-friendly Pickering interfacial catalysis for biodiesel production

2017 ◽  
Vol 19 (19) ◽  
pp. 4552-4562 ◽  
Author(s):  
Bingyu Yang ◽  
Loïc Leclercq ◽  
Jean-Marc Clacens ◽  
Véronique Nardello-Rataj
Keyword(s):  
Surface Modification ◽  
Silica Nanoparticles ◽  
Biodiesel Production ◽  
Pickering Emulsions ◽  
Interfacial Catalysis

Silica nanoparticles have been designed by surface modification to stabilize solventless catalytic Pickering emulsions for effective biodiesel production.

scholarly journals In situ Fabrication of Multi-Walled Carbon Nanotubes/Silica Hybrid Colloidosomes by Pickering Emulsion Templating Using Trialkoxysilanes of Opposite Polarity

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1480 ◽  
Author(s):  
Grzegorzewski ◽  
Benhaim ◽  
Alkotzer ◽  
Zelinger ◽  
Yaakov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silica Nanoparticles ◽  
Droplet Size ◽  
Opposite Polarity ◽  
Pickering Emulsions ◽  
Volume Percentage ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Emulsion Templating ◽  
Silica Hybrid

A simple and effective way to prepare multi-walled carbon nanotubes (MWNT)//silica hybrid microcapsules (colloidosomes) is presented. These microcapsules have been generated by emulsion templating in a biphasic oil-in-water (o/w) system. Two trialkoxysilanes of complementary polarity, (3-aminopropyl)triethoxysilane (APTES) and dodecyltriethoxysilane (DTES), were used to chemically immobilize the silica nanoparticles at the o/w interface and stabilize the as-generated Pickering emulsions. The effects of varying the o/w ratio and the concentration of the added solids on the type of emulsion formed, the oil droplet size, as well as the emulsion stability have been investigated. The emulsion phase fraction was dependent on the silica content while the droplet size increased with increasing oil volume percentage. A solid shell emerged around the oil droplets from copolymerization between silane monomers. The thickness of the resulting shells was several hundreds of nm. Although MWNTs and silica nanoparticles both were co-assembled at the o/w interface, silica has shown to be the sole stabilizer, with APTES being crucial for the formation of the shell structure. Drop-casting of the emulsion and air-drying led to hierarchical open porous MWNT-silica nanocomposites. These new structures are promising as electrically conductive thin films for variety of applications, such as electro-optics, encapsulation, or chemical sensing.

Oleic acid as a synergistic agent in the formation of kaolinite-mineral oil Pickering emulsions

2022 ◽  
Vol 216 ◽  
pp. 106378
Author(s):  
Priscila Gritten Sieben ◽  
Fernando Wypych ◽  
Rilton Alves de Freitas
Keyword(s):  
Oleic Acid ◽  
Mineral Oil ◽  
Pickering Emulsions ◽  
Synergistic Agent

Switchable Pickering Emulsions Stabilized by Silica Nanoparticles Hydrophobized in Situ with a Conventional Cationic Surfactant

Langmuir ◽  
2015 ◽  
Vol 31 (11) ◽  
pp. 3301-3307 ◽  
Author(s):  
Yue Zhu ◽  
Jianzhong Jiang ◽  
Kaihong Liu ◽  
Zhenggang Cui ◽  
Bernard P. Binks
Keyword(s):  
Silica Nanoparticles ◽  
Cationic Surfactant ◽  
Pickering Emulsions

Dynamic Covalent Silica Nanoparticles for pH-Switchable Pickering Emulsions

Langmuir ◽  
2018 ◽  
Vol 34 (20) ◽  
pp. 5798-5806 ◽  
Author(s):  
Gaihuan Ren ◽  
MaoXin Wang ◽  
Lei Wang ◽  
Zengzi Wang ◽  
Qianqian Chen ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Pickering Emulsions

scholarly journals Thermoresponsive Pickering Emulsions Stabilized by Silica Nanoparticles in Combination with Alkyl Polyoxyethylene Ether Nonionic Surfactant

Langmuir ◽  
2017 ◽  
Vol 33 (23) ◽  
pp. 5724-5733 ◽  
Author(s):  
Yue Zhu ◽  
Ting Fu ◽  
Kaihong Liu ◽  
Qi Lin ◽  
Xiaomei Pei ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Silica Nanoparticles ◽  
Pickering Emulsions ◽  
Polyoxyethylene Ether

Surface-functionalizable amphiphilic nanoparticles for pickering emulsions with designer fluid–fluid interfaces

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 39926-39932 ◽  
Author(s):  
Ming Pan ◽  
Minkyu Kim ◽  
Lucas Blauch ◽  
Sindy K. Y. Tang
Keyword(s):  
Silica Nanoparticles ◽  
Interfacial Properties ◽  
Fluid Interfaces ◽  
Pickering Emulsions ◽  
Amphiphilic Nanoparticles

This work describes the synthesis of amphiphilic silica nanoparticles with functionalizable surfaces for stabilizing aqueous drops in fluorinated oils, and for enabling the generation of emulsions with tailored interfacial properties.

scholarly journals Carminic Acid Linked to Silica Nanoparticles as Pigment/Antioxidant Bifunctional Excipient for Pharmaceutical Emulsions

Pharmaceutics ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 376
Author(s):  
Francisco Arriagada ◽  
Catalina Ugarte ◽  
Germán Günther ◽  
María Angélica Larraín ◽  
Víctor Guarnizo-Herrero ◽  
...  
Keyword(s):  
Vitamin E ◽  
Antioxidant Capacity ◽  
Silica Nanoparticles ◽  
Chemical Stability ◽  
Carminic Acid ◽  
Solid Core ◽  
Pharmaceutical Chemical ◽  
Pickering Emulsions ◽  
Ethylcarbodiimide Hydrochloride ◽  
The Stability

The incorporation of pigments and natural polyphenols into inorganic matrices, resulting in a hybrid material that improves the resistance and chemical stability of the pigments and the antioxidant capacity of the materials, has been of great interest to the pharmaceutical, chemical and food industries. The aim of this work was to prepare and characterize a bifunctional pigment–antioxidant nanomaterial-based carminic acid-decorated solid core-mesoporous shell silica nanoparticles, evaluating its properties as a pigment, its antioxidant capacity and its properties as a chemical stabilizer of emulsions. The chemical stability of oil-in-water (O/W) Pickering emulsions was evaluated determining the stability of vitamin E solubilized in the oil phase. Carminic acid was attached through the action of coupling ethylcarbodiimide hydrochloride (EDC)/N-hydroxysuccinimide (NHS) agents, and the resulting spherical and homogeneous nanoparticles showed a diameter close to 175 nm. A notorious change of emulsion color was observed by the addition of the nanomaterial. Emulsions showed an attractive pink color, and when the pH was adjusted to pH 3 and pH 9, a change in color was observed, analogous to carminic acid in solution. The nanomaterial incorporation also improved chemical stability, decreasing vitamin E consumption to 9.26% of the initial value, demonstrating an important antioxidant effect of the developed nanomaterial.

Different cationic surfactants-modified silica nanoparticles for Pickering emulsions

2019 ◽  
Vol 291 ◽  
pp. 111341 ◽  
Author(s):  
Xiao-Qian Wei ◽  
Wan-Ju Zhang ◽  
Lu Lai ◽  
Ping Mei ◽  
Li-Mei Wu ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Cationic Surfactants ◽  
Pickering Emulsions ◽  
Modified Silica ◽  
Modified Silica Nanoparticles
Sign in / Sign up

Export Citation Format

Share Document