Related Experiment Video
Updated: Jan 26, 2026
10:06
Cellular Affinity of Particle-Stabilized Emulsion to Boost Antigen Internalization
Published on: September 2, 2022
2.3K
Destabilizing Pickering emulsions using fumed silica particles with different wettabilities
Christopher Griffith1, Hugh Daigle1
1Hildebrand Department of Petroleum and Geosystems Engineering, University of Texas at Austin, Austin, TX, USA.
Journal of Colloid and Interface Science
|April 6, 2019
Summary
Hydrophobic silica particles can destabilize Pickering emulsions. More hydrophobic particles are more effective at inducing coalescence, with highly hydrophobic particles achieving 85% oil coalescence.
Area of Science:
- Colloid and surface science
- Materials science
Background:
- Pickering emulsions are stabilized by colloidal particles at the oil/water interface, offering stability but posing challenges for destabilization.
- Hydrophobic particles are known to destabilize conventional surfactant-stabilized emulsions.
Purpose of the Study:
- To investigate the potential of hydrophobic colloidal particles for destabilizing Pickering emulsions.
- To explore the correlation between particle hydrophobicity and the ability to induce coalescence in Pickering emulsions.
Main Methods:
- A model oil-in-water Pickering emulsion was prepared using PEG-modified silica nanoparticles.
- Three types of fumed silica particles with varying hydrophobicity (hydrophilic, intermediate, hydrophobic) were added to assess their destabilization efficacy.
- Optical microscopy was employed to observe particle-emulsion interactions.
Main Results:
- A strong correlation was observed between fumed silica particle wettability and Pickering emulsion destabilization.
- Hydrophilic and intermediate hydrophobicity particles failed to induce coalescence due to wetting by the continuous phase.
- Hydrophobic fumed silica particles effectively coalesced the emulsion, achieving 85% oil coalescence at 0.05 wt% addition.
Conclusions:
- Sufficient particle hydrophobicity is crucial for destabilizing Pickering emulsions.
- Hydrophobic particles can dewet emulsion films and induce droplet coalescence, overcoming the steric barrier provided by stabilizing particles.
More Related Videos
Related Concept Videos
01:45Destabilization of Microtubules
3.5K
The destabilization of microtubules can occur during different stages of the microtubule lifecycle, such as nucleation or elongation. It can take place at either end of the microtubule or in the microtubule lattices as a whole. The lifespan of individual microtubules within a cell varies according to the cell type and stage of the cell cycle. During interphase, the lifespan of the microtubule is about 30 minutes, while during cell division, it is about 15 minutes. In axonal microtubules of...
3.5K
01:10Drugs that Destabilize Microtubules
3.7K
Microtubules are dynamic structures and can be regulated by microtubule targeting agents (MTAs). Microtubule destabilizing drugs are a class of MTAs that destabilize and prevent microtubules' polymerization. Both natural and synthetic chemicals can be found under this class of drugs. Vincristine and vinblastine, two vinca alkaloids, and colchicine were among the first to be discovered. These drugs can affect cells in various ways, either by inducing a change in cell morphology, preventing...
3.7K
03:37Subatomic Particles
112.6K
Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
112.6K
01:10Silica Gel Column Chromatography: Overview
3.5K
Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
3.5K
02:10The Nucleosome Core Particle
14.2K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
14.2K
01:12The Nucleosome Core Particle
2.3K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
2.3K