Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

2.3K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
2.3K
Colloids03:22

Colloids

19.1K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
19.1K
Coagulation01:06

Coagulation

549
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
549
Solubility03:00

Solubility

19.7K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
19.7K
Ion Exchange01:17

Ion Exchange

763
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
763
Colloids and Suspensions01:17

Colloids and Suspensions

2.6K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
2.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Catanionics from biosurfactants and regular surfactants: miscibility and structure.

Soft matter·2026
Same author

PERFECTA Loaded Lipid Cubosomes for <sup>19</sup>F-MRI: Physico-Chemical Characterization.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

Human APOB-expressing mice translate molecular phenotypes across the Alzheimer's disease spectrum.

Brain, behavior, and immunity·2026
Same author

Features and mechanism of localized enzyme-assisted self-assembly of peptides from unilamellar vesicles.

Frontiers in chemistry·2026
Same author

Impact of the polymer donor side-chain length on the formation and processing of waterborne nanoparticles for organic solar cells.

Journal of materials chemistry. A·2026
Same author

Halloysite nanotubes interacting with lipid vesicle membranes.

Journal of colloid and interface science·2026

Related Experiment Video

Updated: Nov 5, 2025

Cellular Affinity of Particle-Stabilized Emulsion to Boost Antigen Internalization
10:06

Cellular Affinity of Particle-Stabilized Emulsion to Boost Antigen Internalization

Published on: September 2, 2022

2.0K

pH-switchable pickering emulsions stabilized by polyelectrolyte-biosurfactant complex coacervate colloids.

Sandrine Laquerbe1, Alain Carvalho2, Marc Schmutz2

  • 1Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire de Chimie de la Matière Condensée de Paris, LCMCP, F-75005 Paris, France.

Journal of Colloid and Interface Science
|May 17, 2021
PubMed
Summary

Polyelectrolyte-surfactant complexes (PESCs) in coacervate form, using sophorolipid (SL) biosurfactants and chitosan (CHL) or poly-l-lysine (PLL), act as effective Pickering stabilizers for oil-in-water emulsions. These biobased coacervates offer pH-switchable emulsion properties.

Keywords:
BolaamphiphilesComplex coacervatesPickering emulsionPolyelectrolyte Surfactant Complex (PESC)PolyelectrolytesSophorolipidsSurfactantspH-responsive

More Related Videos

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
10:16

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties

Published on: January 8, 2016

14.1K
Assembly and Characterization of Polyelectrolyte Complex Micelles
08:44

Assembly and Characterization of Polyelectrolyte Complex Micelles

Published on: March 2, 2020

11.1K

Related Experiment Videos

Last Updated: Nov 5, 2025

Cellular Affinity of Particle-Stabilized Emulsion to Boost Antigen Internalization
10:06

Cellular Affinity of Particle-Stabilized Emulsion to Boost Antigen Internalization

Published on: September 2, 2022

2.0K
Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
10:16

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties

Published on: January 8, 2016

14.1K
Assembly and Characterization of Polyelectrolyte Complex Micelles
08:44

Assembly and Characterization of Polyelectrolyte Complex Micelles

Published on: March 2, 2020

11.1K

Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Biotechnology

Background:

  • Polyelectrolyte-surfactant complexes (PESCs) traditionally stabilize emulsions but haven't been explored as Pickering stabilizers in coacervate structures.
  • Pickering emulsifiers require a specific balance of colloidal structure, stability, amphiphilicity, and wettability, which complexed PESCs may not inherently possess.

Purpose of the Study:

  • To investigate the potential of PESC coacervates as Pickering stabilizers for oil-in-water (o/w) emulsions.
  • To utilize sophorolipid (SL) biosurfactants with polyelectrolytes like chitosan (CHL) or poly-l-lysine (PLL) to form novel, biobased, and pH-switchable Pickering emulsions.

Main Methods:

  • Formation of SL-CHL and SL-PLL complex coacervates in aqueous solutions.
  • Emulsification of dodecane using these coacervates to create o/w emulsions.
  • Characterization using confocal laser scanning microscopy (CLSM), cryo-scanning electron microscopy (cryo-SEM), optical microscopy, and oscillatory rheology.

Main Results:

  • SL-CHL and SL-PLL PESC coacervates effectively stabilize o/w emulsions (up to 70% oil) within a specific pH range (6-9) corresponding to complex coacervation.
  • Emulsions exhibit solid-like rheological behavior and mechanical recovery.
  • Microscopy confirmed the colloidal structure of coacervates at the oil/water interface, demonstrating the Pickering effect.

Conclusions:

  • PESC coacervates, particularly those formed with SL biosurfactants, function as efficient Pickering stabilizers.
  • The developed Pickering emulsions are biobased, biocompatible, and pH-switchable.
  • Potential applications exist in cosmetics, food science, and enhanced oil recovery.