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Colloid properties: suspensions of 1 nm-1 μm particles; colloidal stability depends on pH, ionic strength, surface charge.
Trin-for-trin guide
- 1Input particle size, charge, solution composition
- 2Calculate DLVO potential or colloidal stability
- 3Predict aggregation/sedimentation
Løste eksempler
Input
Oil-in-water emulsion: stability improved by surfactants reducing interfacial tension
Resultat
Surfactant concentration critical
Almindelige fejl at undgå
- ✕Neglecting DLVO interactions
- ✕Not accounting for pH effects on charge
Ofte stillede spørgsmål
Why are colloids kinetically stable?
Brownian motion prevents settling; particles too small for gravity, too fast for diffusion aggregation.
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