colloid
Let an agent explain colloids by type, properties, stability and applications in food, materials, medicine and the environment.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain colloids by type, properties, stability and applications in food, materials, medicine and the environment.
A mixture in which microscopic particles or droplets, roughly 1 nanometre to 1 micrometre across, are dispersed throughout another substance without settling, such as sols, gels, emulsions like mayonnaise and aioli, foams, smoke and fog.
What it is for: Food science, materials, pharmaceuticals and environmental science.
It can be classify a colloid by phases; explain the Tyndall effect and stability; describe emulsifiers and stabilisers; find applications and safety data.
Distinguishing features
Dispersed particles of intermediate size
Scatter light
Do not settle quickly
Stability depends on surface forces
What it looks like
Cloudy or opaque liquids, gels, foams and aerosols that scatter light.
How it is recognised
Milky liquids and gels
Visible light beams through the mixture
True solutions are clear and do not scatter light
Related models
is a kind of - category
includes - kind
shows - property
is stabilised by - additive
In practice
Families and kinds
sols
gels
emulsions
foams
aerosols
Standards and regulation
IUPAC terminology for colloids
Food additive rules for emulsifiers and stabilisers
Nanomaterial regulations where applicable
Failure modes and hazards
Emulsions splitting
Food safety of raw egg emulsions
Inhalation of fine aerosols
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Classify Colloid type.
Phases define types.
Phases
Dispersed and continuous.
Phases
Phases.
- What are the dispersed and continuous phases in this mixture? definition
- Which colloid type does that make it? definition
Size
Particle size.
Size
Particle size.
- What is the particle size range? measurement
- How is it measured? definition
Properties Behaviour.
Surfaces control behaviour.
Tyndall
Light scattering.
Tyndall
Tyndall effect.
- How does the Tyndall effect distinguish a colloid from a solution? definition
- How can it be demonstrated safely? action
Stability
Stabilisation.
Stability
Stability.
- What keeps this colloid stable, and what makes it break? definition
- Which stabilisers are used? provenance
Food Culinary colloids.
Kitchens use colloids.
Emulsions
Sauces.
Emulsions
Food emulsions.
- How can a split emulsion such as mayonnaise or aioli be rescued? action
- Why does it split? definition
Safety
Raw eggs.
Safety
Food safety.
- What do food safety authorities advise about raw egg sauces for vulnerable groups? provenance
- Are pasteurised eggs an option? provenance
Applications Uses.
Colloids are widespread.
Materials
Industry.
Materials
Industrial uses.
- How are colloids used in paints, inks, drugs and materials? definition
- Which examples are typical? provenance
Environment
Aerosols and fog.
Environment
Environmental colloids.
- How do natural colloids such as fog and smoke form? definition
- What are their health effects, according to health authorities? provenance
What the second pass must settle
- Should colloid types be separate entries?
- How should food uses be linked?
- How should nanomaterial rules be linked?