dispersion
Let an agent explain dispersions as heterogeneous mixtures, relay classification, stability and characterisation from colloid science references, describe applications in food, paint, pharmaceuticals and materials, and distinguish the mixture sense from optical dispersion, statistical dispersion and seed dispersal.
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 dispersions as heterogeneous mixtures, relay classification, stability and characterisation from colloid science references, describe applications in food, paint, pharmaceuticals and materials, and distinguish the mixture sense from optical dispersion, statistical dispersion and seed dispersal.
In chemistry and materials science, a system in which particles of one phase are distributed throughout another, as in colloidal dispersions of solid particles, droplets or bubbles in a liquid or gas, including suspensions, emulsions, foams and aerosols, with stability governed by particle size, surface chemistry and interactions; the word also names optical, statistical and biological dispersion, which are separate senses.
What it is for: Not applicable; a state of matter mixture.
It can be explain the class; relay stability and characterisation; describe applications; distinguish other senses.
Distinguishing features
Two or more phases
Particle size range
Stability issues
Multiple senses
What it looks like
Cloudy or opaque liquids, foams or smokes.
Physical character
colloidal particle size: about 1-1000 nm
common types: sol, emulsion, foam, aerosol, gel list
Tyndall effect: scattering by colloids note
How it is recognised
Particles distributed in another phase
Colloidal dispersion, suspension, emulsion, foam, aerosol
Optical dispersion separates wavelengths; statistical dispersion is spread; seed dispersal is biological
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is exemplified by - liquid in liquid
is contrasted with - a homogeneous mixture
In practice
Families and kinds
colloidal dispersions or sols
suspensions of larger particles
emulsions of liquid droplets
foams of gas in liquid or solid
aerosols of particles in gas
gels and dispersions in polymers
Standards and regulation
ISO standards for particle size and colloid characterisation
Food and pharmaceutical standards for emulsions and suspensions
Failure modes and hazards
Instability such as settling and coalescence
Confusing senses of dispersion
Confusing colloids with solutions
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.
Understand What a dispersion is.
Science.
Definition
Definition.
Definition
Definition.
- What is a dispersion, and how does it differ from a solution and from optical, statistical and biological dispersion? definition
- Is the question about mixtures or another sense? boundary
Kinds
Kinds.
Kinds
Kinds.
- What are sols, suspensions, emulsions, foams, aerosols and gels? definition
- Which entry fits the specific kind? action
Science Stability and characterisation.
Science.
Stability
Stability.
Stability
Stability.
- What governs dispersion stability, including DLVO theory, surfactants and steric stabilisation? provenance
- Which references are standard? provenance
Characterisation
Characterisation.
Characterisation
Characterisation.
- How are dispersions characterised by light scattering, zeta potential and microscopy? measurement
- Which sources are cited? provenance
Use Applications.
Application.
Products
Products.
Products
Products.
- How are dispersions used in food, paints, cosmetics and pharmaceuticals? provenance
- Which entry fits the specific product class? action
Materials
Materials.
Materials
Materials.
- How are nanoparticle and polymer dispersions used in materials science? provenance
- Which entry fits nanoparticle? action
Context Other senses and history.
Context.
Senses
Other senses.
Senses
Senses.
- What are optical dispersion, statistical dispersion and seed dispersal, and where are they covered? provenance
- Which entry fits the specific sense? action
History
History.
History
History.
- How did colloid science develop from Graham and Tyndall onward? provenance
- Which entry fits the history of colloid science? action
What the second pass must settle
- Should colloid, emulsion and aerosol be the primary linked entries?
- How should colloid science references be linked?
- How should the other senses of dispersion be kept apart?