L1 /
8
CH1012
LYOPHILIC COLLOIDS
2. Lyophilic (in H2O
hydrophilic)
• 1 phase macromolecular
colloidal system
• absence of
surfaces between the disperse phase and
the dispersion medium
• particles are in true solution but
the size of the solute particles
(macromolecules) means that these are
colloidal solutions
• the solution forms spontaneously from the components,
is thermodynamically stable.
eg. PVA
+ H2O ® PVA glue
polyvinyl alcohol sol
(MW 20 000)
polyvinyl alcohol sol
(MW 20 000)
