1 research outputs found
Conical Ionic Amphiphiles Endowed with Micellization Ability but Lacking Air–Water and Oil–Water Interfacial Activity
Micellization in
water and reduction of the surface tension at
water interfaces with air and oil are two archetypical properties
of surfactants, caused by self-aggregation and Gibbs monolayer formation
at the interfaces, respectively. We present here a new type of amphiphiles
that possess a conical shape consisting of a hydrophobic apex and
five ionic termini at the base of the cone. The conical shape and
the high charge density cooperatively impede monolayer formation at
the interfaces, hence preventing foaming and emulsification. On the
other hand, the conical shape strongly assists micelle formation in
water and hemimicelle formation on a solid surface to promote dissolution
of nanoparticles such as magnetic nanoparticles and nanocarbons in
water. The well-defined shape and charge locations distinguish the
new amphiphiles from known polymer amphiphiles that show similar surface
activity