Hydrophobic Colloids
Hydrophobic Colloids - Related Videos
03:22
Colloids
0 Views •
2020
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...
09:26
Synthesis and Characterization of Supramolecular Colloids
0 Views •
Cited by 3 •
2016
A protocol for the synthesis and characterization of colloids coated with supramolecular moieties is described. These supramolecular colloids undergo self-assembly upon the activation of the hydrogen-bonds between the surface-anchored molecules by UV-light.
01:29
The Colloidal State
0 Views •
2026
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 the...
03:22
Calcium-Dependent Hydrophobic Interaction Chromatography: A Technique to Purify Calcium-Binding Proteins Based on Hydrophobic Interactions
0 Views •
2025
In this video, we demonstrate the purification of calcium-binding protein from a dialyzed cell lysate through calcium-dependent hydrophobic interaction chromatography. The calcium-binding proteins expose a hydrophobic region upon binding with calcium, facilitating interaction with a hydrophobic group on resin. Later these proteins are eluted using calcium chelator EDTA that reverses the interaction.
03:46
Butyl-Dependant Hydrophobic Interaction Liquid Chromatography: A Technique to Characterize Antibody-Drug Conjugates Based on Hydrophobic Interactions
0 Views •
2025
This video demonstrates the hydrophobic interaction liquid chromatography-based characterization of antibody-drug conjugates. Using a butyl ligand-based chromatography column, the antibody-drug conjugates are characterized via hydrophobic interactions with the ligand.
FAQs
Surface charge creates electrostatic repulsion between dispersed particles. When neighboring particles carry sufficiently similar charges, this repulsion limits their approach and reduces aggregation, helping the dispersion remain stable. This mechanism is central to sol stability because the particles have little affinity for the surrounding liquid and therefore rely strongly on interparticle repulsion to remain separated.
An electrolyte can screen the surface charges that normally keep the particles apart. As electrostatic repulsion becomes less effective, particles can approach one another more readily and coagulation may occur. This change connects ionic conditions with colloid stability and provides a chemical basis for deliberately destabilizing a sol during precipitation, separation, or treatment processes.
Because the dispersed substance has little affinity for the liquid medium, surface charge provides the main stabilizing influence identified for these systems. The balance between charge-based repulsion and particle contact determines whether the sol remains dispersed or undergoes coagulation. Examining that balance helps chemists interpret why similar finely divided substances can show different stability under changed conditions.
Their dispersed particles present surfaces that participate in interfacial chemical behavior, making these systems useful for understanding adsorption and precipitation. Changes at the particle surface can influence how substances associate with the dispersed phase, while loss of electrostatic stabilization can move the system toward coagulation. These relationships connect colloid chemistry with separation and solid-formation processes.
Formation requires finely divided particles of a water-insoluble substance to become distributed throughout a continuous liquid phase. The resulting dispersion can persist when particle surfaces acquire or retain enough charge to limit aggregation. Metal sols and sulfur sols illustrate this type of system and provide chemically relevant examples for examining how particle identity and surface behavior affect stability.
Hydrophobic colloids are relevant when a process depends on controlling dispersed particles, their surface interactions, or their removal from a liquid. Their stability and coagulation behavior support applications in water treatment, formulation, and separation processes. In each case, understanding charge stabilization and electrolyte-induced destabilization helps explain whether particles remain suspended or collect for subsequent handling.