Week 8 disperse systems surfactants and suspending agents Flashcards
1
Q
Surface tension
A
Problematic in pharmaceutics;
-Wetting process hindered if surface tension too high
-Add surfactant molecules to replace some of the water molecules in the surface
-Forces of attraction between surfactant and water molecules are less than those between two water molecules, hence the contraction force is reduced
2
Q
A