Related Experiment Video
Updated: Apr 23, 2026
09:26
Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
9.5K
Hard and soft colloids at fluid interfaces: Adsorption, interactions, assembly & rheology
Omkar S Deshmukh1, Dirk van den Ende1, Martien Cohen Stuart2
1Physics of Complex Fluids Group, Dept. Science and Technology, University of Twente, Enschede, The Netherlands.
Advances in Colloid and Interface Science
|October 8, 2014
Summary
This review compares soft microgel particles and stiff colloids at fluid-fluid interfaces, highlighting differences in adsorption kinetics and particle interactions. Microgel deformation significantly impacts interfacial layer properties and emulsion stability.
Area of Science:
- Colloid and interface science
- Polymer science
- Materials science
Background:
- Soft microgel particles exhibit characteristics of both polymers and particles.
- Understanding particle behavior at fluid-fluid interfaces is crucial for various applications.
- Stiff colloids and soft microgels present distinct properties when interacting at interfaces.
Purpose of the Study:
- To review and compare soft microgel particles and stiff colloids at fluid-fluid interfaces.
- To analyze differences in adsorption kinetics and inter-particle interactions.
- To discuss the impact of particle properties on interfacial rheology and emulsion stability.
Main Methods:
- Review of theoretical and experimental investigations.
- Comparison of adsorption kinetics and interaction models.
- Analysis of interfacial rheology and emulsion stabilization mechanisms.
Main Results:
- Adsorption kinetics analysis requires reconsideration and a proper equation of state.
- Interactions between adsorbed particles differ significantly between soft microgels and hard colloids.
- Microgel deformation upon adsorption influences interfacial layer assembly and rheology.
Conclusions:
- Soft microgels and stiff colloids exhibit distinct behaviors at fluid-fluid interfaces.
- Microgel deformation is a key factor affecting interfacial properties and stability.
- Further research is needed to fully understand microgel-stabilized emulsions and their stimuli-responsive nature.
Related Concept Videos
01:29The Colloidal State
174
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
174
03:22Colloids
17.1K
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...
17.1K
01:17Colloids and Suspensions
3.4K
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...
3.4K
01:09Colloidal precipitates
5.7K
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...
5.7K
01:06Coagulation
1.5K
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...
1.5K
02:57Surface Tension, Capillary Action, and Viscosity
28.5K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
28.5K