Diploma Food Technology
Reference: Think Quest
http://library.thinkquest.org/3659/structures/
Lesson Eight
Colloids
Definition of colloids and examples
Crystalloid
and colloids (glue like)
Colloidal
systems (not substances)
Solutions, suspensions and colloids
Colloidal particles size max ca. 0.2
u, min 5mu
Separation
Dialysis and filtration
Ultrafiltration
Ultacentifuge
Optical
Properties
Tyndall Effect
Sols
and Gels and Cogels
Disperse Systems
Disperse
phase (particles)
Solids,
liquids, gas
Dispersion
medium (surrounding phase)
Solids,
liquids, gas
|
Dispersion
Medium |
solid |
liquid |
Gas |
|
Disperse
Phase |
|
|
|
|
Solid |
alloy |
Sol, gel |
Dust
,smoke |
|
Liquid |
gel |
emulsion |
Cloud ,
aerosol |
|
gas |
foam |
foam |
N/A. |
Lyophobic
and Lyophilic Systems
Lyophobic (liquid hating)
Lyophilic (liquid loving)
cf.
Hydrophobic and Hydrophilic
Lyophobic
Sols Lyophilic
Sols
|
ST same
as disperse medium |
|
|
PPT |
|
|
|
|
|
|
|
Differences
between properties of colloidal and pure solutions