colloid
Sign in to saveA colloid is a mixture in which one substance, consisting of microscopically dispersed insoluble particles, is suspended throughout another substance. Some definitions specify that the particles must be dispersed in a liquid, while others extend the definition to include substances like aerosols and gels. The term colloidal suspension refers unambiguously to the overall mixture (although a narrower sense of the word suspension is distinguished from colloids by larger particle size). A colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). thu
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A colloid is a mixture where tiny, insoluble particles are suspended throughout another substance—like particles floating in a liquid, gas, or gel. Colloids matter because they're common in everyday materials (milk, fog, and paint are all examples) and understanding their structure helps explain how these mixtures behave and function.
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Article
18 sectionsContents
- Definition
- Classification
- Hydrocolloids
- Components
- Compared with solution
- Interaction between particles
- Sedimentation velocity
- Preparation
- Stabilization
- Destabilization
- Monitoring stability
- Accelerating methods for shelf life prediction
- As a model system for atoms
- Crystals
- In biology
- In the environment
- Intravenous therapy
- References
A colloid is a mixture in which one substance, consisting of microscopically dispersed insoluble particles, is suspended throughout another substance. Some definitions specify that the particles must be dispersed in a liquid, while others extend the definition to include substances like aerosols and gels. The term colloidal suspension refers unambiguously to the overall mixture (although a narrower sense of the word suspension is distinguished from colloids by larger particle size). A colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). thumb|upright=1.2|Scanning electron microscope image of a colloid
Some colloids are translucent because of the Tyndall effect, which is the scattering of light by particles in the colloid. Other colloids may be opaque or have a slight color.