Synthesis, aggregation behavior of novel cationic silicone surfactants in aqueous solution and their application in metal extraction

The aggregation behaviors of the two novel cationic silicone surfactants (Si4pyrCl and Si4pipCl) are investigated and it is greatly varied for the difference of the head groups. This Figure shows that the surface tension of water can be reduced almost to 20 mN m− 1, which indicates that both the two cationic silicone surfactants exhibit superior surface activity.128