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Flashcards in Disperse system Deck (7)
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1

Colloidal disperse system size

1nm-1μm

2

Preparation of colloids

-Dispersion method
Breaking down of large molecule

-Condensation method
aggregation of small particle

3

Dispersion method

coarse material broken down by
-colloid mill
-ultrasonic tratment

4

Condensation method

rapid production of supersaturate solution to produce colloid particle
-chemical reaction
-change in solvent

5

Properties of colloid

-Kinetic
-optical
-electrical

6

Kinetic properties of colloid

-Thermal motion
~Brownian motion
~Diffusion
~Osmotic pressure/osmosis
-Sedimentation
-Viscosity

7

Optical properties of colloid

-Light scattering
~Tyndall effect
-Ultramicroscope
-Electron microscope