Dispersing Tween 80 (TW 80) with an HLB of 15 in molten wax seems to form reverse micelles. If the molten wax formed with reverse micelles is put into water, will it become a normal micelle O/W structure? Compared to dispersing TW 80 in water first to make normal micelles and then adding molten wax, dispersing TW 80 in wax first and then putting it in water resulted in better dispersion. What is the principle?
1. If you place the wax + TW 80 system and disperse it well, then TW 80 will dissolve in water and TW 80 reverse micelles will be converted into straight micelles.
HLB is used to predict emulsions, wetting agents, detergents, solubilisates. To predict the structure of micelles,
So, to obtain stable direct emulsions (oil in water), surfactants with HLB numbers from 10 to 16 (depending on the nature of the oil) are used, to obtain reverse emulsions (water in oil) - from 3 to 5; at HLB 7-8, a transition of emulsions from direct to reverse is observed; HLB numbers are 7-9 for wetting agents, 13-15 for detergents, and 15-16 for solubilizers in aqueous solutions.
In addition to the HLB numbers and the CMC values, there is one more quantity that characterizes the state of the surfactant in the liquid phase. This quantity is called the packing parameter and is denoted Ns in most literature sources. The packing parameter is a dimensionless value of the ratio of the volume of the hydrophobic part of the surfactant (v) to the length of the hydrophobic part of the surfactant (l) and the area of the terminal polar group (s). Thus:
Ns = v/lхs.
If Ns
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